Switching Relays – Oil Boiler Wiring Safety Notice. 2 3 – 4. Switching Relays –
NON EXP Connected .... iring diagram, the boiler oper- ... iring diagram, wiring.
TACO ZONE CONTROLS WIRING GUIDE Pages Switching Relays – Single Zone Wiring Switching Relays – Oil Boiler Wiring Safety Notice Switching Relays – NON EXP Connected Together with Priority
2– 2 23 – 4 5 – 11
Switching Relays – EXP Connected Together with Priority
12 – 14
Switching Relays – Multiple Indirect Hot Water Heaters
15 – 16
Switching Relays – EXP Connected To Reset Controls (PC700, 702 & 705)
17 – 28
Zone Valve Controls – NON EXP Connected Together with Priority
29 – 34
Zone Valve Controls – EXP Connected Together with Priority
35 – 38
Zone Valve Controls – Connected To Reset Controls (PC700, 702 & 705)
39 – 46
Hydro Air Fan Controls (HAFC 101 & 201)
47 – 51
Specialty Thermostat and Zone Valve Wiring
52 – 56
Radiant Mixing Block
57 – 58
X-Pump Block
59 – 61
iSeries Mixing Valves
62 – 63
Low Water Cutoffs and Electric Water Feeders
64 – 79
Aquastat Wiring
80 – 86
Instruction Sheets
87 – 97
Standard Terms and Definitions Cross Reference
– 98 99 – 100
Do it once. Do it right. © Taco Catalog No. 100-9.0
Effective Date: July 1, 2010 Supersedes Date: July 1, 2007
TACO Zone Control Product Information Switching Relays Product No. SR501 SR501-845RP SR502 SR503 SR504 SR506
Description 1 Zone Switching Relay 1 Zone Switching Relay Replacement PC Board for Honeywell R845, RA89A, RA832 or Comparable Relay 2 Zone Switching Relay with Priority 3 Zone Switching Relay with Priority 4 Zone Switching Relay with Priority 6 Zone Switching Relay with Priority
Switching Relays with PowerPort Options and Expandable to 20 Zones Product No. Description SR501-EXP 1 Zone Switching Relay SR503-EXP 3 Zone Switching Relay with Priority and 3 PowerPorts SR504-EXP 4 Zone Switching Relay with Priority and 3 PowerPorts SR506-EXP 6 Zone Switching Relay with Priority and 3 PowerPorts Zone Valve Controls Product No. ZVC403 ZVC404 ZVC405 ZVC406
Description 3 Zone Valve 4 Zone Valve 5 Zone Valve 6 Zone Valve
Control Control with Priority Control Control with Priority
Zone Valve Controls with PowerPort Options and Expandable to 20 Zones Product No. Description ZVC404-EXP 4 Zone Valve Control with Priority and 2 PowerPorts ZVC406-EXP 6 Zone Valve Control with Priority and 2 PowerPorts Plug-In PowerPort Cards (For use with all -EXP controls) Product No. Description PC600 Post Purge Timer Plug-In Card PC605 Priority Protection Plug-In Card PC610 Universal Timer/Pump Exercise Plug-In Card Add-On Power Controls (For use with all -EXP controls) Product No. Description PC700 Boiler Reset Control PC702 2-Stage Boiler Reset Control PC705 Variable Speed Pump Injection Mixing Control Fan Controls Product No. HAFC101 HAFC201
Description Hydro Air Fan Control Hydro Air Fan Control with Optional Time Delays
Do it once. Do it right.
TO: 120 VAC POWER
JUMPER
CIRCULATOR
TO: TT ON BOILER
TO: ZC
CIRCULATOR
Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death.
TO: 120 VAC POWER
TO: ZR
4 4 6 6 5 N H 3 N/O N/C N/C N/O
4 4 6 6 5 N H 3 N/O N/C N/C N/O
T STAT
120 VAC INPUT
POWER
T STAT
24 R W VAC T T COM
POWER
SR501 1 ZONE SWITCHING RELAY
T
T
24 R W VAC T T COM
THERMOSTAT
THERMOSTAT
ALTERNATIVE WIRING (TANKLESS COIL)
SR501 Switching Relay Wiring
120 VAC INPUT
SR501 1 ZONE SWITCHING RELAY
TYPICAL WIRING (COLD START)
2 TO: 120 VAC POWER
REMOVE JUMPER. DO NOT CONNECT POWER TO N AND H TERMINALS.
N
H
24 R W VAC T T COM
T STAT *
POWER *
24 VAC SIGNAL
* T STAT LIGHT WILL GO ON AND OFF WITH 24 VAC SIGNAL. POWER LIGHT WILL ALWAYS BE OFF.
CIRCULATOR
TO: TT ON BOILER
4 4 6 6 5 N H 3 N/O N/C N/C N/O
SR501 1 ZONE SWITCHING RELAY
ALTERNATIVE WIRING (24 VAC POWERED INPUT SIGNAL)
NOTE: No tankless coil priority.
3
(cont.)
L1 (HOT)
L2 THERMOSTATS
(NEUTRAL)
CIRCUIT BREAKER
THERMOSTAT ZONE 4 PRIORITY ON OFF
SR 504 ZONE 1 ZONE 2 ZONE 3 ZONE 4
CUSTOMER EMERGENCY SWITCH
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
L1 POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
THERMAL FUSE (FIROMATIC)
120V RELAY
24 VAC POWER
X
X
ZC ZR END SWITCH
SERVICE SWITCH
ZONE1 ZONE2
ZONE3
T
L2
T
HONEYWELL L8124 OR EQUAL C1 B2
ZC
C2
ZR
B1
ZONE4 POWER
120 VOLT CIRCULATORS
CIRCULATOR ON BOILER (IF ATTACHED)
INPUT
FUSE 1 AMP LINE VOLTAGE OIL BURNER RELAY
LOW WATER CUTOFF
120 VAC INPUT
NOTE: Tankless coil has priority.
L1 (HOT)
L2 THERMOSTAT
(NEUTRAL)
CIRCUIT BREAKER
THERMOSTAT 24 VAC POWER
SR 503 ZONE 1 ZONE 2
CUSTOMER EMERGENCY SWITCH
ZONE 3
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
FUSE 1 AMP
L1
THERMAL FUSE (FIROMATIC)
L2
C1 B2
N
SERVICE SWITCH
P
ZC
H
X2 X1 ZR
ZONE1
ZONE2
C2
ZONE3
120 VOLT CIRCULATORS
CIRCULATOR ON BOILER (IF ATTACHED)
LINE VOLTAGE OIL BURNER RELAY
LOW WATER CUTOFF
120 VAC INPUT
NOTE: The boiler operating control’s ZC terminal will see the load of the circulator(s).
4
T
T
HONEYWELL L8124 OR EQUAL
POWER ZONE 1 ZONE 2 ZONE 3
ZC ZR
B1
SR502/503 Switching Relay Controlling Another SR502/503 Switching Relay AQUASTAT ON DHW HEATER
A
T
T
ZONE1
ZONE2
ZONE3
MASTER 24 VAC POWER
PRIORITY ON VIA JUMPER PLACEMENT
SR 503
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP
POWER ZONE 1 ZONE 2 ZONE 3
N P ZC H
X2 X1 ZR ZONE1 ZONE2
ZONE3
JUMPER
120 VOLT CIRCULATORS
N 120 VAC POWER
H
DHW HEATER CIRCULATOR
T
T
T
ZONE1
ZONE2
ZONE3
PRIORITY OFF VIA JUMPER PLACEMENT
SLAVE 24 VAC POWER
SR 503
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP
N P ZC H
POWER ZONE 1 ZONE 2 ZONE 3
X2 X1 ZR ZONE1 ZONE2
ZONE3
JUMPER
BOILER 120 VOLT CIRCULATORS TO: "TT" ON AQUASTAT CONTROL
5
SR502/503 Switching Relay Controlling Another SR504/506 Switching Relay
AQUASTAT ON DHW HEATER
T
A
T
MASTER PRIORITY ON VIA JUMPER PLACEMENT
24 VAC POWER
SR 503
ZONE1
ZONE2
ZONE3
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP
POWER ZONE 1 ZONE 2 ZONE 3
N P ZC H
X2 X1 ZR ZONE1 ZONE2
ZONE3
JUMPERS
120 VOLT CIRCULATORS
THERMOSTATS
T
SLAVE SR 506
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
ZONE 6 PRIORITY ON
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
120V RELAY
24 VAC POWER
X
X
END SWITCH
PRIORITY OFF
OFF
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
REMOVE JUMPER
TO: "TT" ON BOILER
BOILER
6
120 VAC INPUT
H N
Two SR504/506 Switching Relays Connected Together AQUASTAT ON DHW HEATER
A T
T
T ZONE 4 PRIORITY ON OFF
SR 504
PRIORITY ON
ZONE 1 ZONE 2 ZONE 3 ZONE 4
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY
24 VAC POWER
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER INPUT
120 VOLT CIRCULATORS
FUSE 1 AMP
120 VAC INPUT
JUMPER
DHW HEATER CIRCULATOR
T
BOILER
SR 504
T
T ZONE 4 PRIORITY ON OFF
PRIORITY ON
ZONE 1 ZONE 2 ZONE 3 ZONE 4
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY
24 VAC POWER
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
H 120 VAC INPUT
JUMPER
N
TO: "TT" ON BOILER OUTPUT NOT USED
7
Priority Zoning Circulator Controlling SR504/506 Switching Relay
MASTER PRIORITY ON
PRIORITY ZONING CIRCULATOR PRIORITY OFF THERMOSTAT 2 1
BOILER 4 3
ON
PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT
120 VAC INPUT
A AQUASTAT ON DHW HEATER
THERMOSTATS
T
PRIORITY OFF
SLAVE
SR 506
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
ZONE 6 PRIORITY ON
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
120V RELAY
24 VAC POWER
X
X
END SWITCH
OFF
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
REMOVE JUMPER
TO: "TT" ON BOILER
BOILER
8
120 VAC INPUT
H N
9
BOILER
FUSE 1 AMP
SLAVE
24 VAC POWER
X
A
T
T ZONE 4 PRIORITY ON OFF
INPUT
ZONE4 POWER
120 VOLT CIRCULATORS
ZONE3
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
ZONE1 ZONE2
TO: "TT" ON BOILER
REMOVE JUMPER
ZC ZR END SWITCH
X
120V RELAY
SR 504
T
AQUASTAT ON DHW HEATER
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY OFF
THERMOSTAT 2 1
BOILER 4 3
FUSE 1 AMP
SLAVE
PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT
OFF ON
X
X
T
T
T
ZONE3
ZONE 4 PRIORITY ON OFF
INPUT
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
PRIORITY ON
REMOVE JUMPER
ZC ZR END SWITCH
120V RELAY
SR 504
120 VAC INPUT
PRIORITY
PRIORITY ZONING CIRCULATOR
MASTER
Priority Zoning Circulator Controlling 2 SR504/506 Switching Relays
24 VAC POWER
120 VAC INPUT
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY OFF
N
H
BOILER
FUSE 1 AMP
SLAVE
24 VAC POWER
X
REMOVE JUMPER
ZC ZR
T
T ZONE 4 PRIORITY ON OFF
INPUT
ZONE4 POWER
120 VOLT CIRCULATORS
ZONE3
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
ZONE1 ZONE2
TO: "TT" ON BOILER
END SWITCH
X
120V RELAY
SR 504
T
24 VAC POWER
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
JUMPER
A
ZONE2
T
ZONE3
T
ZONE3
FUSE 1 AMP
SLAVE
X2 X1 ZR ZONE1 ZONE2
TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE1
N P ZC H
FUSE 1 AMP
SR 503
PRIORITY OFF
MASTER
AQUASTAT ON DHW HEATER
X
X
END SWITCH
120V RELAY
REMOVE JUMPER
ZC ZR
SR 504
POWER ZONE 1 ZONE 2 ZONE 3
PRIORITY ON
T
T
T
ZONE3
ZONE 4 PRIORITY ON OFF
120 VAC INPUT
INPUT
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
SR502/503 Switching Relay Controlling 2 SR504/506 Switching Relays
24 VAC POWER
10 N
H
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY OFF
11
BOILER
24 VAC POWER
FUSE 1 AMP
SLAVE
X
TO: "TT" ON BOILER
REMOVE JUMPER
ZC ZR END SWITCH
X
120V RELAY
SR 504
T
T
T
ZONE3
JUMPER
4 4 6 6 5 N H 3 N/O N/C N/C N/O
ZONE 4 PRIORITY ON OFF
INPUT
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY OFF
DHW CIRCULATOR
ZONE4 POWER
120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
FUSE 1 AMP
SLAVE
120 VAC INPUT
T STAT
POWER
24 VAC POWER
DHW HEATER
AQUASTAT ON
24 R W VAC T T COM
1 ZONE SWITCHING RELAY
SR501
MASTER
A
X
X
REMOVE JUMPER
ZC ZR END SWITCH
120V RELAY
SR 504
T
T
T
ZONE3
120 VAC INPUT
INPUT
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY OFF ZONE 4 PRIORITY ON OFF
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
SR501 Switching Relay Controlling 2 SR504/506 Switching Relays
H N
SR501-EXP Switching Relay Controlling Another SR504/506 Switching Relay
AQUASTAT ON DHW HEATER TO: "TT" ON BOILER
A TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE
MASTER
MODE
POWER CONTROLS
RESET
END SWITCH
NORMAL
EXPANSION
X X 1 2 3 4
SLAVE FUSE 1 AMP
THERMOSTAT
ZONE VALVE
T/R T/W COM
1 2
SR 501-EXP MASTER
POWER T STAT
FUSE 5 AMP
N
H ZC ZR H
POWER INPUT
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
DHW CIRCULATOR
JUMPER
T
THERMOSTATS
SLAVE SR 506
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
ZONE 6 PRIORITY ON
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
120V RELAY
24 VAC
X
POWER
X
END SWITCH
PRIORITY OFF
OFF
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
REMOVE JUMPER
TO: "TT" ON BOILER
BOILER
12
120 VAC INPUT
H N
MODE
H
N
MASTER
SLAVE
NORMAL
RESET
BOILER
120 VAC INPUT
FUSE 1 AMP
POWER CONTROLS
TO BOILER AQUASTAT RELAY
EXPANSION
1 2
ZONE VALVE
H
24 VAC
SLAVE
SYSTEM PUMP TURNS ON WHEN ANY ZONE VALVE OPENS EXCEPT WHEN THE DHW HEATER (SR501-EXP) CALLS.
SYSTEM PUMP
24 VAC
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
WHITE
DHW HEATER CIRCULATOR
T STAT
POWER
TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE
BOILER TURNS ON WHEN ANY ZONE VALVE OPENS.
JUMPER
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
H ZC ZR H
FUSE 5 AMP
POWER INPUT
N
T/R T/W COM
THERMOSTAT
SR 501-EXP
X X 1 2 3 4
END SWITCH
A
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
AQUASTAT ON DHW HEATER
EXTRA MAIN END END SWITCH SWITCH
POWER IN
MASTER
MODE
NORMAL RESET
JUMPER 3&4
ZONE 1 1 2 3 4
2 WIRE ZONE VALVE (NO END SWITCH)
N/O COM N/C ZONE 6 RELAY
T T ZONE 1
T T ZONE 4
ZVC 406
T T ZONE 3
T T ZONE 5
T
1 2 3
ZONE 3 1 2 3 4
TACO 3 WIRE ZONE VALVE
ZONE 2 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
PRIORITY ZONE
SEE NOTE
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
JUMPER 3&4
ZONE 6 1 2 3 4
ON
OFF
ZONE 6 PRIORITY
T T ZONE 6
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
T
T 24 VAC
THERMOSTAT
THERMOSTAT
THERMOSTAT
SR501-EXP Switching Relay Controlling a ZVC404/406 Zone Valve Control
FUSE (7 AMP MAX)
13
2 Expandable Switching Relays Connected Together
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
THERMOSTATS
T
SLAVE SLAVE
PLUG-IN CARDS MASTER
EXPANSION
POWER CONTROL INTERFACE
ZONE 4 PRIORITY ON OFF
1 2 3 4
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
RESET NORMAL
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC
120V RELAY
SR 504-EXP
POWER
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
120 VAC INPUT
JUMPER
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On THERMOSTATS
T
MASTER PLUG-IN CARDS
SLAVE
POWER CONTROL INTERFACE
A
MASTER
1 2 3 4
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
EXPANSION
RESET
24 VAC
NORMAL
X
X
END SWITCH
ZC ZR
ZONE 6 PRIORITY ON OFF
SR 506-EXP SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
120V RELAY
POWER
AQUASTAT ON DHW HEATER
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
H JUMPER
N
TO: "TT" ON BOILER
BOILER
14
120 VAC INPUT
DHW CIRCULATOR
15
FUSE 1 AMP
BOILER
24 VAC POWER
SLAVE
X
TO: "TT" ON BOILER
JUMPER
ZC ZR END SWITCH
X
120V RELAY
SR 504
T
T
ZONE3
ZONE NOT USED
24 VAC POWER
ZONE 4 PRIORITY ON OFF
INPUT
ZONE4 POWER
120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
MASTER
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY ON
JUMPERS
A
ZONE2
A
ZONE3
POWER
24 V AC
ZONE3
FUSE 1 AMP
SLAVE
X2 X1 ZR ZONE1 ZONE2
TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE1
N P ZC H
FUSE 1 AMP
SR 502
AQUASTATS ON DHW HEATERS
X
X
JUMPER
ZC ZR END SWITCH
120V RELAY
SR 504
POWER ZONE 1 ZONE 2
PRIORITY OFF
T
T
ZONE3
ZONE 4 PRIORITY ON OFF
ZONE NOT USED
120 VAC INPUT
INPUT
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
2 Indirect Water Heaters with Priority Connected to Standard Switching Relays
N
H
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
PRIORITY ON
16
SWITCH SETTINGS
BOILER
24 VAC POWER
POWER CONTROL INTERFACE
SLAVE
1 2 3 4
X
TO: "TT" ON BOILER
JUMPER
ZC ZR END SWITCH
X
120V RELAY
SR 504-EXP
ZONE 4 PRIORITY ON OFF
MASTER
ZONE NOT USED
INPUT
ZONE4 POWER
120 VOLT CIRCULATORS
ZONE3
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
SR504-EXP
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
ZONE1 ZONE2
PLUG-IN CARDS
RESET NORMAL
EXPANSION
FUSE 1 AMP
MASTER
Master/Slave: Master Reset/Normal: Normal Priority Zone: On
24 VAC POWER
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
JUMPERS
ZONE2
A
ZONE3
AQUASTATS ON DHW HEATERS
24 VAC POWER
POWER CONTROL INTERFACE
SLAVE
FUSE 1 AMP
X
END SWITCH
X
120V RELAY
JUMPER
ZC ZR
RESET NORMAL
EXPANSION
SWITCH SETTINGS
SR504-EXP
SR 504-EXP
120 VAC INPUT
INPUT
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE3
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE 4 PRIORITY ON OFF
SLAVE
N
H
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
ZONE1 ZONE2
PLUG-IN CARDS
POWER ZONE 1 ZONE 2
PRIORITY OFF
1 2 3 4
DHW CIRCULATORS
ZONE3
MASTER
X2 X1 ZR ZONE1 ZONE2
TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE1
N P ZC H
FUSE 1 AMP
SR 502
A
2 Indirect Water Heaters with Priority Connected to EXP Switching Relays
PC700 Boiler Reset Control Connected to SR501-EXP Switching Relay
OUTDOOR SENSOR
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset
PC700
THERMOSTAT TO: "TT" ON BOILER
BOIL OUT SEN SEN
T
ZONE CONTROL
TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE
BOILER SENSOR POWER CONTROLS
MODE RESET
NORMAL SLAVE
END SWITCH
EXPANSION
X X 1 2 3 4
FUSE 1 AMP
THERMOSTAT
ZONE VALVE
T/R T/W COM
1 2
SR 501-EXP MASTER
POWER T STAT
FUSE 5 AMP
N
H ZC ZR H
POWER INPUT
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
BOILER JUMPER
H 120 VAC INPUT
SYSTEM CIRCULATOR
N
17
SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Switching Relay OUTDOOR SENSOR
AQUASTAT ON DHW HEATER
A
Note: If Zone Control comes on without a call for heat, reverse Reset Override input (1 & 2) wires on SR501-EXP. TO: "TT" ON BOILER
PC700 BOIL OUT SEN SEN
EXISTING ZONE CONTROL
POWER CONTROLS
ZONE CONTROL
END SWITCH
EXPANSION
X X 1 2 3 4 K1-A
BOILER SENSOR FUSE 1 AMP
THERMOSTAT
RESET OVERRIDE
T/R T/W COM
1 2
THERMOSTATS
T
MODE RESET
ZONE 4 PRIORITY ON OFF
SR 504 ZONE1 ZONE2 ZONE3 ZONE4
MASTER
SR 501-EXP
SLAVE
K1
NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER T STAT
K2
FUSE 5 AMP
K2-A
H ZC ZR H
POWER INPUT
24 VAC POWER
120V RELAY
K1-B
N
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
K2-A
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
X
X
END SWITCH
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
JUMPER
MASTER
JUMPER PRIMARY SYSTEM CIRCULATOR (Optional)
BOILER
DHW HEATER CIRCULATOR
120 VAC INPUT
H N
Connecting a DHW Heater to an Existing Heating Only Switching Relay Using an SR501-EXP and PC700 Boiler Reset Control OUTDOOR SENSOR
A
AQUASTAT ON DHW HEATER
TO: "TT" ON BOILER
T PC700 BOIL OUT SEN SEN
MASTER
EXISTING ZONE CONTROL
POWER CONTROLS
ZONE CONTROL
END SWITCH
EXPANSION
X X 1 2 3 4 BOILER SENSOR
K1-A FUSE 1 AMP
THERMOSTAT
RESET OVERRIDE
T/R T/W COM
1 2
SLAVE
MODE RESET
SR 504 ZONE1 ZONE2 ZONE3 ZONE4
MASTER
SR 501-EXP
SLAVE
K1
NORMAL
K2-A
K2-A
H
24 VAC POWER
120V RELAY
H ZC ZR H
POWER INPUT
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
POWER T STAT
K2
K1-B
N
ZONE 4 PRIORITY ON OFF
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
FUSE 5 AMP
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
X
X
END SWITCH
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
JUMPER
BOILER
THERMOSTATS
DHW HEATER CIRCULATOR
REMOVE JUMPER 120 VAC INPUT
H N
18
SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Zone Valve Control OUTDOOR SENSOR
AQUASTAT ON DHW HEATER
A
Note: If Zone Control comes on without a call for heat, reverse Reset Override input (1 & 2) wires on SR501-EXP. TO: "TT" ON BOILER
PC700 BOIL OUT SEN SEN
120 VAC INPUT
POWER CONTROLS
ZONE CONTROL
BLACK END SWITCH
EXPANSION
X X 1 2 3 4 K1-A
BOILER SENSOR
MASTER
RESET OVERRIDE
T/R T/W COM
1 2
SR 501-EXP
SLAVE
K1
T
EXISTING ZONE CONTROL
24 VAC
T
T 24 VAC
ZONE 4 PRIORITY
MODE
MODE
NORMAL RESET
RESET
OFF
T T ZONE 1
POWER IN
T T ZONE 2
T T ZONE 3
ON
T T ZONE 4
T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 POWER
NORMAL FUSE (3 AMP MAX)
FUSE 1 AMP
THERMOSTAT
FACTORY INSTALLED TRANSFORMER
THERMOSTATS WHITE
POWER T STAT
K2
ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 5 AMP EXTRA MAIN END END SWITCH SWITCH
K1-B
N
K2-A
H ZC ZR H
POWER INPUT
ZONE 1 1 2 3 4
N/O COM N/C ZONE 4 RELAY
ZONE 2 1 2 3 4
ZONE 4 1 2 3 4
ZONE 3 1 2 3 4
K2-A
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
JUMPER
TACO 3 WIRE ZONE VALVE
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE VALVE SYSTEM CIRCULATOR
PRIMARY SYSTEM CIRCULATOR (Optional)
BOILER
MOTOR
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
DHW HEATER CIRCULATOR
H N
120 VAC INPUT
Connecting a DHW Heater to an Existing Heating Only Zone Valve Control Using an SR501-EXP and PC700 Boiler Reset Control OUTDOOR SENSOR
A
AQUASTAT ON DHW HEATER
TO: "TT" ON BOILER
PC700 BOIL OUT SEN SEN
WHITE
MASTER
120 VAC INPUT
POWER CONTROLS
ZONE CONTROL
BLACK END SWITCH
RESET THERMOSTAT OVERRIDE
EXPANSION
X X 1 2 3 4 K1-A
BOILER SENSOR
MASTER
T/R T/W COM
SLAVE
K1
T
EXISTING ZONE CONTROL
T
T
SLAVE
24 VAC
ZONE 4 PRIORITY
MODE
MODE
NORMAL RESET
RESET
OFF
1 2
SR 501-EXP
24 VAC
T T ZONE 1
POWER IN
T T ZONE 2
T T ZONE 3
T T ZONE 4
NORMAL FUSE (3 AMP MAX)
FUSE 1 AMP
FACTORY INSTALLED TRANSFORMER
THERMOSTATS
POWER T STAT
K2
ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 5 AMP EXTRA MAIN END END SWITCH SWITCH
K1-B
N
K2-A
H ZC ZR H
POWER INPUT
N/O COM N/C ZONE 4 RELAY
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ON
T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 POWER
K2-A
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
JUMPER
DHW HEATER CIRCULATOR
BOILER
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
ZONE VALVE SYSTEM CIRCULATOR
H N
120 VAC INPUT
19
SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Tankless Coil Boiler – Zoning with Circulators OUTDOOR SENSOR
THERMOSTATS
T
EXISTING ZONE CONTROL
POWER CONTROLS END SWITCH
PC700
EXPANSION
X X 1 2 3 4
RESET OVERRIDE
T/R T/W COM
1 2
MODE RESET
ZONE 4 PRIORITY ON OFF
SR 504 ZONE1 ZONE2 ZONE3 ZONE4
K1-A
MASTER
FUSE 1 AMP
ZONE CONTROL
SR 501-EXP
SLAVE
BOILER SENSOR
K1
NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
120V RELAY
K1-B
N
K2-A
H ZC ZR H
POWER INPUT
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
POWER T STAT
K2
FUSE 5 AMP
24 VAC POWER
BOIL OUT SEN SEN
THERMOSTAT
K2-A
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
X
X
END SWITCH
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
JUMPER PRIMARY SYSTEM CIRCULATOR (Optional)
REMOVE JUMPER
TO: "ZR" ON BOILER CONTROL 120 VAC INPUT
TO: "ZC" ON BOILER CONTROL
H
BOILER
N
Boiler and Zone Control(s) need to be on same power supply (same circuit breaker).
SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Tankless Coil Boiler – Zoning with Zone Valves OUTDOOR SENSOR
MASTER
BLACK
POWER CONTROLS
PC700 END SWITCH
BOIL OUT SEN SEN
EXPANSION
X X 1 2 3 4
ZONE CONTROL
K1-A
BOILER SENSOR
T/R T/W COM
SLAVE
K1
T
EXISTING ZONE CONTROL
T
T
SLAVE
24 VAC
ZONE 4 PRIORITY
MODE
MODE
NORMAL RESET
RESET
OFF
1 2
SR 501-EXP
24 VAC
T T ZONE 1
POWER IN
T T ZONE 2
T T ZONE 3
T T ZONE 4
NORMAL FUSE (3 AMP MAX)
FUSE 1 AMP
MASTER
RESET THERMOSTAT OVERRIDE
FACTORY INSTALLED TRANSFORMER
THERMOSTATS WHITE 120 VAC INPUT
POWER T STAT
K2
ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 5 AMP EXTRA MAIN END END SWITCH SWITCH
K1-B
N
K2-A
H ZC ZR H
N/O COM N/C ZONE 4 RELAY
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ON
T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 POWER
K2-A
H
POWER 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT INPUT
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE 1 2 3
TACO 2 WIRE ZONE VALVE (NO END SWITCH) 3 WIRE ZONE VALVE
JUMPER PRIMARY SYSTEM CIRCULATOR (Optional) TO: "ZR" ON BOILER CONTROL
ZONE VALVE SYSTEM CIRCULATOR
MOTOR
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
TO: "ZC" ON BOILER CONTROL
BOILER
H N
120 VAC INPUT
Boiler and Zone Control(s) need to be on same power supply (same circuit breaker).
20
21
OUTDOOR SENSOR
ZONE CONTROL
BOILER
BOILER SENSOR
BOIL OUT SEN SEN
PC700
24 VAC POWER
POWER CONTROL INTERFACE
FUSE 1 AMP
MASTER
1234
X
JUMPER
ZC ZR END SWITCH
X
120V RELAY
RESET NORMAL
PLUG-IN CARDS
TO: "TT" ON BOILER
SLAVE
Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
SWITCH SETTINGS
ZONE3
INPUT
N
H
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VAC INPUT
ZONE 4 PRIORITY ON OFF
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
SR 504-EXP
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
THERMOSTATS
PC700 Boiler Reset Control Connected to EXP Switching Relay
22
BOILER #2
BOILER #1
BOILER SENSOR
STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL
PC702
DHW DEMAND
OUTDOOR SENSOR
1234
FUSE 1 AMP
MASTER
WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW
POWER
24 VAC
POWER CONTROL INTERFACE
SLAVE
X
JUMPER
ZC ZR END SWITCH
X
120V RELAY
RESET NORMAL
PLUG-IN CARDS
SYSTEM CIRCULATOR (OPTIONAL)
Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
SWITCH SETTINGS
ZONE3
INPUT
N
H
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VAC INPUT
ZONE 4 PRIORITY ON OFF
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
SR 504-EXP
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
THERMOSTATS
PC702 2–Stage Boiler Reset Control Connected to EXP Switching Relay
23
OUTDOOR SENSOR
ZONE CONTROL
BOILER
BOILER SENSOR
SUPPLY SENSOR
BOIL SUP OUT SEN SEN SEN
PC705-2
BLACK
BLUE
RED
FUSE 1 AMP
MASTER
1234
X
SYSTEM CIRCULATOR AND/OR BOILER (SEE NOTE A)
END SWITCH
X
120V RELAY
JUMPER
ZC ZR
RESET NORMAL
PLUG-IN CARDS
TO: "TT" ON BOILER
SLAVE
24 VAC POWER
INJECTION CIRCULATOR
SYSTEM CIRCULATOR AND/OR BOILER
(SEE NOTE B)
Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
ZONE3
INPUT
NOTE B: WHEN SYSTEM CIRCULATOR IS CONNECTED TO RED WIRE ON PC705-2, THE CIRCULATOR WILL OPERATE ONLY WHEN THERMOSTAT CALLS FOR HEAT AND THE OUTDOOR TEMPERATURE IS BELOW THE WARM WEATHER SHUT DOWN (WWSD) TEMPERATURE. THE WWSD CAN BE ADJUSTED OR TURNED OFF SO THAT THE CIRCULATOR IS NOT AFFECTED BY OUTDOOR TEMPERATURE.
H
N
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VAC INPUT
ZONE 4 PRIORITY ON OFF
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE1 ZONE2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
SR 504-EXP
ZONE 1 ZONE 2 ZONE 3 ZONE 4
T
THERMOSTATS
NOTE A: WHEN SYSTEM CIRCULATOR IS CONNECTED TO ZR TERMINAL ON SWITCHING RELAY, THE MODE SWITCH MUST BE SET TO NORMAL. THE PC705-2 WILL NOT RESET THE BOILER WHEN IN THE NORMAL MODE.
GREEN/GROUND
SWITCH SETTINGS
PC705 Variable Speed Pump Injection Control Connected to EXP Switching Relay
PC700 Boiler Reset Control Connected to 2 EXP Switching Relays
OUTDOOR SENSOR
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
PC700
T
SLAVE
MASTER
PLUG-IN CARDS
ZONE 4 PRIORITY ON OFF
1 2 3 4
MASTER
ZONE CONTROL
BOIL OUT SEN SEN
THERMOSTATS
EXPANSION
POWER CONTROL INTERFACE
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR 504-EXP
BOILER SENSOR
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
RESET NORMAL
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC
120V RELAY
POWER
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
TO: "TT" ON BOILER
JUMPER 120 VAC INPUT
BOILER
SWITCH SETTINGS THERMOSTATS
Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority
T
SLAVE MASTER POWER CONTROL INTERFACE
SLAVE
PLUG-IN CARDS 1 2 3 4 EXPANSION
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 PRIORITY ON OFF
SR 504-EXP RESET NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
120V RELAY
24 VAC POWER
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
H
JUMPER
N 120 VAC INPUT SYSTEM CIRCULATOR (OPTIONAL)
24
PC702 2–Stage Boiler Reset Control Connected to 2 EXP Switching Relays
OUTDOOR SENSOR
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
DHW DEMAND
THERMOSTATS
T MASTER
PC702
SLAVE
STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL
PLUG-IN CARDS
ZONE 4 PRIORITY ON OFF
1 2 3 4
MASTER
EXPANSION
POWER CONTROL INTERFACE
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR 504-EXP
BOILER SENSOR
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
RESET NORMAL
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC
120V RELAY
POWER
X
BOILER #1
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
120 VAC INPUT
JUMPER
BOILER #2
WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority
THERMOSTATS
T
SLAVE
PLUG-IN CARDS MASTER
POWER CONTROL INTERFACE
SLAVE
1 2 3 4 EXPANSION
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 PRIORITY ON OFF
SR 504-EXP RESET NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC POWER
120V RELAY
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
H JUMPER
N 120 VAC INPUT
SYSTEM CIRCULATOR (OPTIONAL)
25
PC705 Variable Speed Pump Injection Control Connected to 2 EXP Switching Relays
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off OUTDOOR SENSOR
THERMOSTATS
T MASTER
GREEN/GROUND (SEE NOTE B ON PAGE 23)
SLAVE
PLUG-IN CARDS 1 2 3 4
MASTER
RED
EXPANSION
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SYSTEM CIRCULATOR
BLUE
SR 504-EXP
PC705-2
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
RESET NORMAL BOIL SUP OUT SEN SEN SEN
ZONE CONTROL
BLACK
ZONE 4 PRIORITY ON OFF
INJECTION CIRCULATOR
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
SUPPLY SENSOR
24 VAC POWER
BOILER SENSOR
120V RELAY
X
X
END SWITCH
ZC ZR
ZONE1 ZONE2
ZONE3
ZONE4 POWER INPUT
120 VOLT CIRCULATORS
FUSE 1 AMP
JUMPER TO: "TT" ON BOILER
120 VAC INPUT
BOILER
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority
THERMOSTATS
T SLAVE
SLAVE
PLUG-IN CARDS MASTER
POWER CONTROL INTERFACE
1 2 3 4 EXPANSION
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 PRIORITY ON OFF
SR 504-EXP RESET NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC POWER
120V RELAY
X
X
END SWITCH
ZC ZR
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
H JUMPER
N 120 VAC INPUT
SYSTEM CIRCULATOR (OPTIONAL) (SEE NOTE A ON PAGE 23)
26
PC700 and PC705 Controls Connected to 2 EXP Switching Relays OUTDOOR SENSOR
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
T
SLAVE
PC700
MASTER
PLUG-IN CARDS 1 2 3 4
MASTER
ZONE CONTROL
BOIL OUT SEN SEN
THERMOSTATS
EXPANSION
POWER CONTROL INTERFACE
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 PRIORITY ON OFF
SR 504-EXP
BOILER SENSOR
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
RESET NORMAL
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC POWER
120V RELAY
X
X
END SWITCH
ZONE1 ZONE2
ZC ZR
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP
120 V AC INPUT
JUMPER
TO: "TT" ON BOILER
BOILER
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority OUTDOOR SENSOR
THERMOSTATS
GREEN/GROUND
T
(SEE NOTE B ON PAGE 23)
SLAVE
RED
BLUE
SYSTEM CIRCULATOR
PC705-2 BOIL SUP OUT SEN SEN SEN
ZONE CONTROL
BLACK
SLAVE
PLUG-IN CARDS MASTER
1 2 3 4 EXPANSION
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 PRIORITY ON OFF
SR 504-EXP
INJECTION CIRCULATOR
RESET NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
SUPPLY SENSOR BOILER SENSOR
24 VAC POWER
120V RELAY
X
X
END SWITCH
ZC ZR
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP JUMPER
SYSTEM CIRCULATOR (OPTIONAL LOCATION) (SEE NOTE A ON PAGE 23)
H N 120 VAC INPUT
27
PC702 and PC705 Controls Connected to 2 EXP Switching Relays SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
OUTDOOR SENSOR
THERMOSTATS
T MASTER
DHW DEMAND
SLAVE
PC702
PLUG-IN CARDS 1 2 3 4
MASTER
EXPANSION
POWER CONTROL INTERFACE
STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE 4 PRIORITY ON OFF
SR 504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
RESET NORMAL BOILER SENSOR
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC POWER
120V RELAY
X
X
ZONE1 ZONE2
ZC ZR END SWITCH
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
BOILER #1
FUSE 1 AMP
120 VAC INPUT
JUMPER
BOILER #2 WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority OUTDOOR SENSOR
THERMOSTATS
T
GREEN/GROUND (SEE NOTE B ON PAGE 23)
SLAVE SLAVE
PLUG-IN CARDS
RED
BLUE
SYSTEM CIRCULATOR
MASTER
1 2 3 4 EXPANSION
ZONE 1 ZONE 2 ZONE 3 ZONE 4
PC705-2 BOIL SUP OUT SEN SEN SEN
ZONE CONTROL
BLACK
ZONE 4 PRIORITY ON OFF
SR 504-EXP
INJECTION CIRCULATOR
RESET NORMAL
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
SUPPLY SENSOR BOILER SENSOR
24 VAC POWER
120V RELAY
X
X
ZC ZR END SWITCH
ZONE1 ZONE2
ZONE3
ZONE4 POWER
120 VOLT CIRCULATORS
INPUT
FUSE 1 AMP JUMPER
SYSTEM CIRCULATOR (OPTIONAL LOCATION) (SEE NOTE A ON PAGE 23)
H N 120 VAC INPUT
28
BOILER
H
N 24 VAC
24 VAC
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
END SWITCH
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
SYSTEM PUMP
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
WHITE
N/O COM N/C
POWER IN
T T ZONE 2
T T ZONE 4
ZVC 405
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
2 WIRE ZONE VALVE (NO END SWITCH)
1 2 3
ZONE 3 1 2 3 4
TACO 3 WIRE ZONE VALVE
ZONE 2 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
FIVE ZONE ZONE VALVE CONTROL
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 1
T
T 24 VAC
THERMOSTAT
THERMOSTAT
ZVC403/405 with System Pump
FUSE (5 AMP MAX)
29
VALVE 4 T STAT 5 VALVE 5 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
BOILER
H
N
WHITE 24 VAC
24 VAC
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
SYSTEM PUMP
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
EXTRA MAIN END END SWITCH SWITCH
DRY CONTACTS
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 1
2 WIRE ZONE VALVE (NO END SWITCH)
N/O COM N/C ZONE 6 RELAY
MODE
NORMAL RESET
ZVC 406
T T ZONE 4
T T ZONE 5
T
THERMOSTAT
1 2 3
ZONE 3 1 2 3 4
TACO 3 WIRE ZONE VALVE
ZONE 2 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
OFF
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
T STAT 2
VALVE 1
T STAT 1
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
ON
SEE NOTE
AQUASTAT ON DHW HEATER
ZONE 6 PRIORITY
T T ZONE 6
A
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
T T ZONE 3
T
T 24 VAC
THERMOSTAT
THERMOSTAT
ZVC404/406 with System Pump
POWER IN
30 FUSE (7 AMP MAX)
BOILER
H
N
WHITE 24 VAC
24 VAC
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
DHW PUMP
EXTRA MAIN END END SWITCH SWITCH
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 1
T T ZONE 4
ZVC 406
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
1 2 3
ZONE 3 1 2 3 4
TACO 3 WIRE ZONE VALVE
ZONE 2 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
AQUASTAT ON DHW HEATER
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
SEE NOTE
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
ON
OFF
ZONE 6 PRIORITY
T T ZONE 6
A
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
2 WIRE ZONE VALVE (NO END SWITCH)
N/O COM N/C ZONE 6 RELAY
MODE
T
T 24 VAC
THERMOSTAT
THERMOSTAT
NORMAL RESET
DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
BOILER TURNS ON WHEN ANY ZONE VALVE OPENS.
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK POWER IN
ZVC404/406 with Domestic Hot Water (DHW) Pump
FUSE (7 AMP MAX)
31
BOILER
H
N
WHITE 24 VAC
24 VAC
EXTRA MAIN END END SWITCH SWITCH
DHW PUMP
DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 1
T T ZONE 4
ZVC 406
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
1 2 3
ZONE 3 1 2 3 4
TACO 3 WIRE ZONE VALVE
ZONE 2 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
AQUASTAT ON DHW HEATER
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
SEE NOTE
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
ON
OFF
ZONE 6 PRIORITY
T T ZONE 6
A
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
2 WIRE ZONE VALVE (NO END SWITCH)
N/O COM N/C ZONE 6 RELAY
MODE
NORMAL RESET
T
T 24 VAC
THERMOSTAT
THERMOSTAT
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
SYSTEM PUMP
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
ZVC404/406 with System and DHW Pumps
POWER IN
32 FUSE (7 AMP MAX)
BOILER
H
N
WHITE 24 VAC
24 VAC
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
DHW PUMP
EXTRA MAIN END END SWITCH SWITCH
SECONDARY PUMP COMES ON WHEN ANY ZONE CALLS EXCEPT PRIORITY ZONE.
DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
T T ZONE 4
ZVC 406
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
1 2 3
ZONE 3 1 2 3 4
TACO 3 WIRE ZONE VALVE
ZONE 2 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
AQUASTAT ON DHW HEATER
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
SEE NOTE
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
ON
OFF
ZONE 6 PRIORITY
T T ZONE 6
A
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
2 WIRE ZONE VALVE (NO END SWITCH)
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 1
SECONDARY PUMP
N/O COM N/C ZONE 6 RELAY
MODE
NORMAL RESET
T
T 24 VAC
THERMOSTAT
THERMOSTAT
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
SYSTEM PUMP
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK POWER IN
ZVC404/406 with System, DHW and Secondary Pumps
FUSE (7 AMP MAX)
33
2 ZVC404/406 Connected Together with Priority
THERMOSTAT
THERMOSTAT
THERMOSTAT
T
T
T
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
N H
FACTORY INSTALLED TRANSFORMER
24 VAC
WHITE 120 VAC INPUT BLACK
ZONE 4 PRIORITY
MODE
NORMAL RESET
24 VAC
OFF
PRIORITY ON
ON
T T ZONE 1
POWER IN
T T ZONE 2
FUSE (3 AMP MAX)
EXTRA MAIN END END SWITCH SWITCH
T T ZONE 3
T T ZONE 4
T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3
ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
ZONE 1 1 2 3 4
N/O COM N/C ZONE 4 RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
VALVE 3 T STAT 4 VALVE 4 POWER ZONE 4 1 2 3 4
TO BOILER AQUASTAT RELAY JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE 1 2 3
DRY CONTACTS
MOTOR
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
THERMOSTAT
THERMOSTAT
THERMOSTAT
T
T
T
AQUASTAT ON DHW HEATER
A
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
24 VAC ZONE 4 PRIORITY
MODE
NORMAL RESET
24 VAC
OFF ON
T T ZONE 1
POWER IN
FUSE (3 AMP MAX)
EXTRA MAIN END END SWITCH SWITCH
N/O COM N/C ZONE 4 RELAY
T T ZONE 2
T T ZONE 3
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
VALVE 3 T STAT 4 VALVE 4 POWER ZONE 4 1 2 3 4
JUMPER 3&4
PRIORITY ZONE 1 2 3
DRY CONTACTS
2 WIRE ZONE VALVE (NO END SWITCH)
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3
ZVC 404
TO BOILER AQUASTAT RELAY
34
T T ZONE 4
FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
JUMPER 3&4
BOILER
PRIORITY ON
SEE NOTE
2 EXP Zone Valve Controls Connected Together with System Pump
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On
T
T 24 VAC
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE
FACTORY INSTALLED TRANSFORMER
MASTER 120 VAC INPUT BLACK
AQUASTAT ON DHW HEATER
A
T
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
ZONE 1 1 2 3 4
END SWITCH A BOILER
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
VALVE 6 POWER ON
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE
TO BOILER AQUASTAT RELAY
MOTOR
1 2 3
BOILER
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
SYSTEM PUMP
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
N H
120 VAC INPUT
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
T
T
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
SLAVE
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
VALVE 6 POWER ON
SEE NOTE
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
35
2 EXP Zone Valve Controls Connected Together with DHW Pump
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On
T
T 24 VAC
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE
FACTORY INSTALLED TRANSFORMER
MASTER 120 VAC INPUT BLACK
AQUASTAT ON DHW HEATER
A
T
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
ZONE 1 1 2 3 4
END SWITCH A BOILER
TO BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
VALVE 6 POWER ON
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE MOTOR
1 2 3
BOILER
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
DHW PUMP
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
N H
120 VAC INPUT
BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
T
T
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2 VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
36
T T ZONE 4
ZVC 406-EXP FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
SLAVE
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
VALVE 6 POWER ON
SEE NOTE
2 EXP Zone Valve Controls Connected Together with System and DHW Pumps
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On
T
T 24 VAC
SLAVE
1 2 3 4
POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE
FACTORY INSTALLED TRANSFORMER
MASTER 120 VAC INPUT BLACK
AQUASTAT ON DHW HEATER
A
T
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
ZONE 1 1 2 3 4
END SWITCH A BOILER
TO BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
VALVE 6 POWER ON
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE
BOILER
MOTOR
1 2 3
SYSTEM PUMP
DHW PUMP
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
N H
120 VAC INPUT
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
T
T
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
SLAVE
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
VALVE 6 POWER ON
SEE NOTE
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
37
2 EXP Zone Valve Controls Connected Together with System, DHW and Secondary Pumps
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On
T
T 24 VAC
SLAVE POWER CONTROLS
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
24 VAC
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE
FACTORY INSTALLED TRANSFORMER
MASTER 120 VAC INPUT BLACK
AQUASTAT ON DHW HEATER
A
T
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
ZONE 1 1 2 3 4
END SWITCH A BOILER
TO BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
VALVE 6 POWER ON
JUMPER 3&4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE
BOILER
DHW PUMP
MOTOR
1 2 3
SYSTEM PUMP
SECONDARY PUMP
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
N H
120 VAC INPUT
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SECONDARY PUMP TURNS ON WHEN ANY ZONE CALLS, EXCEPT PRIORITY ZONE.
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
T
T
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2 VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
38
T T ZONE 4
ZVC 406-EXP FUSE 7 AMP MAX
24 VAC
MODE
WHITE
ZONE 6 PRIORITY ON
PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
SLAVE
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
VALVE 6 POWER ON
SEE NOTE
39
BOILER
OUTDOOR SENSOR
ZONE CONTROL
TACO, INC ZVC406-EXP END SWITCH B PUMP
RESET
NORMAL
END SWITCH A BOILER
SYSTEM CIRCULATOR
DRY CONTACTS
1 2 3 4
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 4
ZVC 406-EXP
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
TACO 3 WIRE ZONE VALVE
1 2 3
ZONE 3 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
OFF
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
T T ZONE 6
ZONE 6 PRIORITY ON
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
ZONE 2 1 2 3 4
T T ZONE 1
2 WIRE ZONE VALVE (NO END SWITCH)
EXPANSION MASTER
N/O COM N/C ZONE 6 RELAY
MODE
SLAVE POWER CONTROLS
PLUG-IN CARDS
T
T 24 VAC
THERMOSTAT
THERMOSTAT
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
24 VAC
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK 24 VAC
BOILER SENSOR
WHITE
BOIL OUT SEN SEN
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
POWER IN
PC700
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
PC700 Boiler Reset Control Connected To EXP Zone Valve Control
FUSE 7 AMP MAX
N
H
SEE NOTE
POWER ON
VALVE 6
T STAT 6
VALVE 5
T STAT 5
VALVE 4
T STAT 4
VALVE 3
T STAT 3
VALVE 2
T STAT 2
VALVE 1
T STAT 1
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
BOILER #2
BOILER #1
BOILER SENSOR
STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL
BLACK
120 VAC INPUT
WHITE
BLACK
120 VAC INPUT
WHITE 24 VAC
WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW
N/O COM N/C ZONE 6 RELAY
END SWITCH A BOILER
DHW CIRCULATOR
NORMAL
SYSTEM CIRCULATOR
1 2 3 4
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 4
ZVC 406-EXP
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
TACO 3 WIRE ZONE VALVE
1 2 3
ZONE 3 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
OFF
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
T T ZONE 6
ZONE 6 PRIORITY ON
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
ZONE 2 1 2 3 4
T T ZONE 1
2 WIRE ZONE VALVE (NO END SWITCH)
EXPANSION MASTER
PLUG-IN CARDS
T
T 24 VAC
THERMOSTAT
THERMOSTAT
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
END SWITCH B PUMP
RESET
MODE
SLAVE POWER CONTROLS
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
TACO, INC ZVC406-EXP
PC702
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
24 VAC
DHW DEMAND
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
POWER IN
OUTDOOR SENSOR
PC702 2–Stage Boiler Reset Control Connected To EXP Zone Valve Control
FUSE 7 AMP MAX
40 N
H
SEE NOTE
POWER ON
VALVE 6
T STAT 6
VALVE 5
T STAT 5
VALVE 4
T STAT 4
VALVE 3
T STAT 3
VALVE 2
T STAT 2
VALVE 1
T STAT 1
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
41
BOILER
ZONE CONTROL
WHITE
BLACK
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
BOILER SENSOR
SUPPLY SENSOR
BOIL SUP OUT SEN SEN SEN
PC705-2
BLUE
RED
TO BOILER AQUASTAT RELAY
24 VAC END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
NORMAL
DRY CONTACTS
1 2 3 4
END SWITCH A BOILER
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 4
ZVC 406-EXP
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
TACO 3 WIRE ZONE VALVE
1 2 3
ZONE 3 1 2 3 4
MOTOR
END SWITCH
ZONE 5 1 2 3 4
OFF
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
T T ZONE 6
ZONE 6 PRIORITY ON
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
ZONE 4 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
ZONE 2 1 2 3 4
T T ZONE 1
2 WIRE ZONE VALVE (NO END SWITCH)
EXPANSION MASTER
SYSTEM CIRCULATOR (OPTIONAL LOCATION)
RESET
MODE
SLAVE POWER CONTROLS
T
T 24 VAC
THERMOSTAT
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
THERMOSTAT
PLUG-IN CARDS
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
24 VAC
INJECTION CIRCULATOR
(SEE NOTE B ON PAGE 23)
SYSTEM CIRCULATOR
TACO, INC ZVC406-EXP
GREEN/GROUND
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
POWER IN
OUTDOOR SENSOR
PC705 Variable Speed Pump Injection Control Connected To EXP Zone Valve Control
FUSE 7 AMP MAX
N
H
SEE NOTE
POWER ON
VALVE 6
T STAT 6
VALVE 5
T STAT 5
VALVE 4
T STAT 4
VALVE 3
T STAT 3
VALVE 2
T STAT 2
VALVE 1
T STAT 1
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
PC700 Boiler Reset Control Connected To 2 EXP Zone Valve Controls
OUTDOOR SENSOR
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
PC700 ZONE CONTROL
T
BOILER SENSOR
T
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
ZONE 6 PRIORITY ON
PLUG-IN CARDS
24 VAC
SLAVE POWER CONTROLS
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
MODE
WHITE
T
24 VAC
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
T STAT 1
OFF
VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
MASTER POWER IN
BOIL OUT SEN SEN
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
ZONE 1 1 2 3 4
END SWITCH A BOILER
N/O COM N/C ZONE 6 RELAY
TO BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
MOTOR
1 2 3
BOILER
DHW CIRCULATOR
POWER ON
JUMPER 3&4
JUMPER 3&4
SYSTEM CIRCULATOR
VALVE 6
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
SEE NOTE
PRIORITY ZONE
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
H N
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
120 VAC INPUT BLACK
SLAVE POWER CONTROLS
MODE
24 VAC
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
2 WIRE ZONE VALVE (NO END SWITCH)
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
42
T ZONE 6 PRIORITY ON
FUSE 7 AMP MAX
WHITE
FACTORY INSTALLED TRANSFORMER
BLACK
POWER IN
120 VAC INPUT
T 24 VAC
PLUG-IN CARDS
24 VAC
TACO, INC ZVC406-EXP
WHITE
FACTORY INSTALLED TRANSFORMER
SLAVE
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
VALVE 6 POWER ON
SEE NOTE
PC702 2–Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls
OUTDOOR SENSOR
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
DHW DEMAND
PC702
WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL
T
BOILER SENSOR
T
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
ZONE 6 PRIORITY ON
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
T
24 VAC PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
MASTER
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
ZONE 1 1 2 3 4
END SWITCH A BOILER
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
POWER ON
JUMPER 3&4
JUMPER 3&4
BOILER #1
VALVE 6
SEE NOTE
PRIORITY ZONE MOTOR
1 2 3
SYSTEM CIRCULATOR
DHW CIRCULATOR
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
H N
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. BOILER #2
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
T
SLAVE POWER CONTROLS
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
ZONE 6 PRIORITY ON
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
T
24 VAC PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
SLAVE
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4
VALVE 6 POWER ON
SEE NOTE
PRIORITY ZONE 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
43
PC705 Variable Speed Pump Injection Control Connected To 2 EXP Zone Valve Controls
OUTDOOR SENSOR
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
GREEN/GROUND (SEE NOTE B ON PAGE 23)
RED
SYSTEM CIRCULATOR
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
BLUE
PC705-2
INJECTION CIRCULATOR
BLACK BOIL SUP OUT SEN SEN SEN
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
ZONE CONTROL
T
SUPPLY SENSOR
T
24 VAC
SLAVE POWER CONTROLS
BLACK
24 VAC
TACO, INC ZVC406-EXP
WHITE
FACTORY INSTALLED TRANSFORMER
MODE RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
BLACK
ZONE 6 PRIORITY ON
PLUG-IN CARDS POWER IN
FACTORY INSTALLED TRANSFORMER
WHITE 120 VAC INPUT
T
24 VAC
MASTER
BOILER SENSOR
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
ZONE 1 1 2 3 4
END SWITCH A BOILER
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
MOTOR
1 2 3
BOILER
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
SYSTEM CIRCULATOR (OPTIONAL LOCATION)
VALVE 6 POWER ON
JUMPER 3&4
JUMPER 3&4
DRY CONTACTS
TO BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
END SWITCH
SEE NOTE
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
H N
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
T
T
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
BLACK
ZONE 6 PRIORITY ON
PLUG-IN CARDS
24 VAC
SLAVE POWER CONTROLS
MODE
WHITE
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
2 WIRE ZONE VALVE (NO END SWITCH)
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
44
T
24 VAC
FUSE 7 AMP MAX
120 VAC INPUT BLACK
POWER IN
WHITE
FACTORY INSTALLED TRANSFORMER
SLAVE
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
VALVE 6 POWER ON
SEE NOTE
PC700 and PC705 Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
PC700 ZONE CONTROL
T
BOILER SENSOR
T
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
ZONE 6 PRIORITY ON
PLUG-IN CARDS
24 VAC
SLAVE POWER CONTROLS
MODE
WHITE
T
24 VAC
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
T STAT 1
OFF
VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
MASTER POWER IN
BOIL OUT SEN SEN
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
ZONE 1 1 2 3 4
END SWITCH A BOILER
N/O COM N/C ZONE 6 RELAY
TO BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
POWER ON
JUMPER 3&4
JUMPER 3&4 MOTOR
1 2 3
BOILER
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM CIRCULATOR
VALVE 6
SEE NOTE
PRIORITY ZONE
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
DHW CIRCULATOR
H N OUTDOOR SENSOR
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
GREEN/GROUND
(SEE NOTE B ON PAGE 23) SYSTEM CIRCULATOR
RED
BLUE
PC705-2 BOIL SUP OUT SEN SEN SEN
INJECTION CIRCULATOR
ZONE CONTROL
BLACK
SUPPLY SENSOR BOILER SENSOR
T
T
120 VAC INPUT BLACK
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
ZONE 6 PRIORITY ON
24 VAC
SLAVE POWER CONTROLS
MODE
24 VAC
RESET
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
WHITE
FACTORY INSTALLED TRANSFORMER
BLACK
POWER IN
120 VAC INPUT
T
24 VAC PLUG-IN CARDS
TACO, INC ZVC406-EXP
WHITE
FACTORY INSTALLED TRANSFORMER
SLAVE
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
JUMPER 3&4
JUMPER 3&4 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
ZONE 6 1 2 3 4
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
VALVE 6 POWER ON
SEE NOTE
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
45
PC702 and PC705 Connected To 2 EXP Zone Valve Controls SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
OUTDOOR SENSOR
DHW DEMAND
PC702
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL
T
BOILER SENSOR
T
SLAVE POWER CONTROLS
24 VAC
FACTORY INSTALLED TRANSFORMER
RESET
TACO, INC ZVC406-EXP
BOILER #1 120 VAC INPUT BLACK
ZONE 6 PRIORITY ON
1 2 3 4
T T ZONE 1
EXPANSION MASTER
NORMAL
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
T STAT 1
OFF
VALVE 1 T STAT 2
ZVC 406-EXP
VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
FUSE 7 AMP MAX
24 VAC
MODE
WHITE
T
24 VAC PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
MASTER
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
ZONE 1 1 2 3 4
END SWITCH A BOILER
N/O COM N/C ZONE 6 RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
MOTOR
1 2 3
SYSTEM CIRCULATOR
DHW CIRCULATOR
POWER ON
JUMPER 3&4
JUMPER 3&4
BOILER #2
VALVE 6
TACO 3 WIRE ZONE VALVE
2 WIRE ZONE VALVE (NO END SWITCH)
END SWITCH
SEE NOTE
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
H N OUTDOOR SENSOR
SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
GREEN/GROUND
(SEE NOTE B ON PAGE 23)
RED
SYSTEM CIRCULATOR
BLUE
PC705-2
INJECTION CIRCULATOR
BLACK BOIL SUP OUT SEN SEN SEN
ZONE CONTROL
SUPPLY SENSOR BOILER SENSOR
T
T
SLAVE POWER CONTROLS
SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
24 VAC
TACO, INC ZVC406-EXP
FACTORY INSTALLED TRANSFORMER
120 VAC INPUT BLACK
RESET
1 2 3 4
ZONE 6 PRIORITY ON
T T ZONE 1
EXPANSION MASTER NORMAL
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2 VALVE 2
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
N/O COM N/C ZONE 6 RELAY
DRY CONTACTS
END SWITCH A BOILER
ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4
PRIORITY ZONE 1 2 3
2 WIRE ZONE VALVE (NO END SWITCH)
46
T T ZONE 2
ZVC 406-EXP FUSE 7 AMP MAX
24 VAC
MODE
WHITE
T
24 VAC PLUG-IN CARDS
POWER IN
WHITE 120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
SLAVE
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
VALVE 6 POWER ON
SEE NOTE
HAFC101 with 1 Speed Air Handler
THERMOSTAT
T
Optional Power Wire to Thermostat that Requires 24VAC
To: Aquastat on Return Line of Hydro Coil
C R W Y G T T THERMOSTAT
AQUASTAT
Power On Call for Heat Fan, Cooling Fan, Heating
HAFC101 HYDRO AIR FAN CONTROL
BOILER
AIR HANDLER
X X C R Y G G
LOW HIGH
Dry Contacts To: “T T” on Boiler or Switching Relay
24 VAC
Jumper
Line
Fan Relay
Outdoor Condenser Unit
M
HAFC 101 WITH 1 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)
47
HAFC101 with 2 Speed Air Handler
THERMOSTAT
T To: Aquastat on Return Line of Hydro Coil
Optional Power Wire to Thermostat that Requires 24VAC
C R W Y G T T THERMOSTAT
AQUASTAT
Power On Call for Heat Fan, Cooling Fan, Heating
HAFC101 HYDRO AIR FAN CONTROL
BOILER
AIR HANDLER
X X C R Y G G
Line
Fan Relays
High
Low
Dry Contacts To: “T T” on Boiler or Switching Relay
24 VAC
LOW HIGH
Outdoor Condenser Unit
M
HAFC 101 WITH 2 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)
48
HAFC201 with 1 Speed Air Handler
To: Optional Aquastat on Return Line of Hydro Coil
THERMOSTAT
T Optional Power Wire to Thermostat that Requires 24VAC
To: Optional Aquastat or Thermostat to sense low ambient temperature
C R W Y G T T T T THERMOSTAT
WATER COIL FREEZE PR AQUASTATS
Power On Call for Heat Fan, Cooling Fan, Heating
HAFC201 HYDRO AIR FAN CONTROL OFF
DRY CONTACTS 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP
ON
NOTE: For 4 minute on delay of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position.
5 AMP 1/6 HP RATED
PUMP
BOILER
AIR HANDLER
XX X X C R Y G G
LOW HIGH Jumper
Hot Neutral 24 VAC
(or to “T T” on switching relay)
Fan Relay
Dry Contacts To: “T T” on Boiler or Switching Relay
Line
Circulator
Outdoor Condenser Unit
M
HAFC 201 WITH 1 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)
49
HAFC201 with 2 Speed Air Handler
To: Optional Aquastat on Return Line of Hydro Coil
THERMOSTAT
T Optional Power Wire to Thermostat that Requires 24VAC
To: Optional Aquastat or Thermostat to sense low ambient temperature
C R W Y G T T T T THERMOSTAT
WATER COIL FREEZE PR AQUASTATS
Power On Call for Heat Fan, Cooling Fan, Heating
HAFC201 HYDRO AIR FAN CONTROL OFF
DRY CONTACTS 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP
ON
NOTE: For 4 minute on delay of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position.
5 AMP 1/6 HP RATED
PUMP
BOILER
AIR HANDLER
XX X X C R Y G G
LOW HIGH
Hot
Line
“T T” on Boiler or Switching Relay
Low
Circulator
High
24 VAC
(or to “T T” on switching relay)
Fan Relays
Neutral
Outdoor Condenser Unit
M
HAFC 201 WITH 2 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.)
50
51
OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC
AQUASTAT
AIR HANDLER
LOW
HIGH
M
BOILER
TO: "TT" ON BOILER
FUSE 1 AMP
OUTDOOR CONDENSER UNIT
POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING
24 VAC POWER
2 SPEED AIR HANDLER
Low
X X C R Y G G
BOILER
HAFC101 HYDRO AIR FAN CONTROL
THERMOSTAT
High
X
END SWITCH
X
120V RELAY
JUMPER
ZC ZR
SR 504
AQUASTAT
BOILER HIGH
M
INPUT
ZONE4 POWER 120 VOLT CIRCULATORS
ZONE3
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
N
H
OUTDOOR CONDENSER UNIT
120 VAC INPUT
ZONE 4 PRIORITY ON OFF
2 SPEED AIR HANDLER
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE1 ZONE2
LOW
AIR HANDLER
X X C R Y G G
POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING
TO: AQUASTAT ON RETURN LINE OF HYDRO COIL
HAFC101 HYDRO AIR FAN CONTROL
THERMOSTAT
C R W Y G T T
T
Low
C R W Y G T T
OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC
High
TO: AQUASTAT ON RETURN LINE OF HYDRO COIL
Fan Relays
T
Fan Relays
THERMOSTAT
OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC
AQUASTAT
BOILER
LOW
AIR HANDLER HIGH
X X C R Y G G
DHW HEATER AQUASTAT
2 SPEED AIR HANDLER
M
OUTDOOR CONDENSER UNIT
POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING
TO: AQUASTAT ON RETURN LINE OF HYDRO COIL
HAFC101 HYDRO AIR FAN CONTROL
THERMOSTAT
C R W Y G T T
T
THERMOSTAT
Low
THERMOSTAT
24 VAC
Line
24 VAC Line
24 VAC Line
High
Multiple HAFC’s and Switching Relay
Fan Relays
3 Wire Thermostat Connected to TACO Switching Relay 3 WIRE THERMOSTAT
T
COM
T W
T
T
R
ZONE 4 PRIORITY ON OFF
SR 504
ZONE 1 ZONE 2 ZONE 3 ZONE 4
FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC POWER 120V RELAY
X
X
ZONE1 ZONE2
ZC ZR END SWITCH
ZONE3
ZONE4 POWER INPUT
120 VOLT CIRCULATORS
FUSE 1 AMP
H 120 VAC INPUT
JUMPER
N
TO: "TT" ON BOILER
BOILER
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
WHITE
THERMOSTAT
THERMOSTAT
T
T
T
R
RED
W
WH
24 VAC
POWER IN
120 VAC INPUT BLACK
THERMOSTAT
C
COMMON
WHITE
FACTORY INSTALLED TRANSFORMER
3 Wire Thermostat Connected to TACO Zone Valve Control
T T ZONE 1
T T ZONE 2
T T ZONE 3
T T ZONE 4
T T ZONE 5
VALVE 1 T STAT 2
24 VAC
ZVC 405 FIVE ZONE ZONE VALVE CONTROL
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
JUMPER 3&4
RED RED
T T
ZONE 1 1 2 3 4
BLACK BLACK
END SWITCH
TO T&T ON BOILER OR PUMP RELAY 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH)
52
T STAT 1
3 WIRE ZONE VALVE (TACO TYPE)
MOTOR
END SWITCH
4 WIRE ZONE VALVE (HONEYWELL TYPE)
VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 POWER
53
WHITE
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
END SWITCH
TO T&T ON BOILER OR PUMP RELAY
24 VAC
FACTORY INSTALLED TRANSFORMER
FACTORY INSTALLED TRANSFORMER
T T
24 VAC
POWER IN
NOTE: WHEN USING ZVC 404 OR ZVC 406, CONNECT WIRE #2 OF ZONE VALVE TO PRIORITY ZONE RIGHT TT SCREW
T T ZONE 2
T T ZONE 4
ZVC 405
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
1 2 3
ZONE 3 1 2 3 4
3 WIRE ZONE VALVE (TACO TYPE)
ZONE 2 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
FIVE ZONE ZONE VALVE CONTROL
WHITE-ROGERS 1361 HYDRONIC ZONE VALVE
2 1 4 3
ZONE 1 1 2 3 4
T T ZONE 1
T
T RIGHT TT SCREW (SEE NOTE)
THERMOSTAT
THERMOSTAT
END SWITCH
4 WIRE ZONE VALVE (HONEYWELL TYPE)
MOTOR
BLACK BLACK
VALVE 4 T STAT 5 VALVE 5 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
TERMINAL ASSIGNMENT ZONE VALVE CONTROL 1 1 2 TT (Rt) 3 3 4 2
White-Rogers 1361 Hydronic Zone Valve with TACO Zone Valve Control
RED RED
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
WHITE
END SWITCH
TO T&T ON BOILER OR PUMP RELAY
24 VAC
FACTORY INSTALLED TRANSFORMER
FACTORY INSTALLED TRANSFORMER
T T
24 VAC
POWER IN
NOTE: WHEN USING ZVC 404 OR ZVC 406, CONNECT WIRE #3 OF ZONE VALVE TO PRIORITY ZONE RIGHT TT SCREW
T T ZONE 4
ZVC 405
T T ZONE 3
T T ZONE 5
T
THERMOSTAT
6 4 1
1 2 3
ZONE 3 1 2 3 4
3 WIRE ZONE VALVE (TACO TYPE)
ZONE 2 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
FIVE ZONE ZONE VALVE CONTROL
T T ZONE 2
HONEYWELL VC (SPST) HYDRONIC ZONE VALVE SERIES 40 & 80
3 2
ZONE 1 1 2 3 4
T T ZONE 1
T
T RIGHT TT SCREW (SEE NOTE)
THERMOSTAT
THERMOSTAT
END SWITCH
4 WIRE ZONE VALVE (HONEYWELL TYPE)
MOTOR
BLACK BLACK
VALVE 4 T STAT 5 VALVE 5 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
TERMINAL ASSIGNMENT ZONE VALVE CONTROL ORANGE 1 3 BLUE 2 1 BROWN 3 TT (Rt) GRAY 4 4 BLACK 6 2
Honeywell VC 40 & 80 (spdt) Hydronic Zone Valve with TACO Zone Valve Control
RED RED
54
570 Zone Valve to Switching Relay
T
THERMOSTAT
24 VAC TRANSFORMER 1 2 3
24 VAC POWER
SR 503
ZONE1
ZONE2
ZONE3
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP
N P ZC H
POWER ZONE 1 ZONE 2 ZONE 3
X2 X1 ZR ZONE1 ZONE2
ZONE3
JUMPERS
120 VOLT CIRCULATORS TO: 120 VAC POWER (NEUTRAL) TO: 120 VAC POWER (HOT) TO: "TT" ON AQUASTAT CONTROL TO: "TT" ON AQUASTAT CONTROL
55
WHITE 24 VAC
24 VAC
SYSTEM PUMP
TO BOILER AQUASTAT RELAY
120 VAC INPUT BLACK
WHITE
120 VAC INPUT BLACK
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
BOILER
H
N
FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER
EXTRA MAIN END END SWITCH SWITCH
DRY CONTACTS
N/O COM N/C ZONE 6 RELAY
MODE
NORMAL RESET
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
MOTOR
JUMPER 3&4
ZONE 1 1 2 3 4
T T ZONE 1
ZVC 406
T T ZONE 4
T T ZONE 5
T
THERMOSTAT
ZONE 2 1 2 3 4
ZONE 4 1 2 3 4
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
MOTOR
ZONE 5 1 2 3 4
PRIORITY ZONE
JUMPER 3&4
ZONE 6 1 2 3 4
OFF
THERMOSTAT 2 1
BOILER 4 3
120 VAC INPUT
PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT
OFF
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
VALVE 2 T STAT 3 VALVE 3 T STAT 4
VALVE 1 T STAT 2
T STAT 1
PRIORITY ON
PRIORITY ON
Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
ON
SEE NOTE
AQUASTAT ON DHW HEATER
ZONE 6 PRIORITY
T T ZONE 6
A
PRIORITY ZONING CIRCULATOR
TACO 3 WIRE ZONE VALVE
1 2 3
ZONE 3 1 2 3 4
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY
T T ZONE 2
T T ZONE 3
T
T 24 VAC
THERMOSTAT
THERMOSTAT
Zone Valve Control with 1 Low Temperature Zone Using Priority Zoning Circulator
POWER IN
56 FUSE (7 AMP MAX)
Radiant Mixing Block (RMB) Back of Control Boiler Operation Off-Enable On-Control
Front of Control
R
C US 158033
Meets Class B: Canadian ICES FCC Part 15
Boiler
Power: 120 V + 10% 50/60 Hz, 750 VA Var. Speed: 120 V (ac) 1 A Pmp Relay: 120 V (ac) 5 A, 1/6 hp Use copper conductors only
Sys
Fuse
Com Sup Sys Com Boil Out Com Heat Ret Dem
Boiler
MENU ITEM
Y R B
Pump H
Man
N
Var RADIANT MIXING BLOCK PATENT PENDING
UL
Line Cord
RMB-1
Supply Sensor
Injection Circulator
Boiler Sensor
To Zone Control End Switch or Thermostat
Outdoor Sensor
Radiant Circulator
Radiant Mixing Block, Single Zone
Boiler
RMB
Boiler Operation Off-Enable On-Control
Back of Control
T
Thermostat (Dry Contact)
Pump
ComSup Sys Com Boil Out Com Heat Dem Ret
H
H
N
N
Power Input
Outdoor Sensor
N
Boiler Sensor
Supply Sensor
High Mass Boiler
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 57
Radiant Mixing Block Connected to Zone Valve Control with System Pump Wired off the RMB N
POWER IN
Input Outdoor Sensor
Boiler
Boiler Operation Off-Enable On-Control
RMB
T
T T ZONE 1
T T ZONE 2
E ND SWITCH
THREE ZONE ZONE VALVE CONTROL ZONE 1 1 2 3 4
N/O COM N/C
Pump
Com Sup Sys Com Boil Out Com Heat Dem Ret
T T ZONE 3
ZVC 403
FUSE (5 AMP MAX)
Back of Control
Thermostats
T
Factory Installed Transformer
Power H
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
H
M
N
End Switch
Motor
Motor
End Switch
N
M
Boiler Sensor
Supply Sensor
Radiant Mixing Block Connected to 2 EXP Switching Relays with DHW Pump T
Thermostats
A
T
Power Cord
DHW Aquastat Outdoor Sensor
T SLAVE MASTER
1 2 3 4 ZONE1
EXPANSION
RESET
NORMAL
ZONE2
ZONE3
OFF
Boiler
POWER CONTROL INTERFACE
SLAVE
PLUG-IN CARDS MASTER
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
EXPANSION
RMB
X END SWITCH
ZC ZR
ZONE1 ZONE2 ZONE3 120 VOLT CIRCULATORS
ZONE3
OFF
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
SR503-EXP
On-Control
Pump ComSup Sys Com Boil Out ComHeat Dem Ret X
ZONE2
Back of Control
SR503-EXP
24 VAC POWER
ZONE1
RESET NORMAL
Boiler Operation Off-Enable
ZONE 3 PRIORITY ON
1 2 3 4
POWER CONTROL INTERFACE
ZONE 3 PRIORITY ON
PLUG-IN CARDS
Thermostats
T
POWER INPUT
X 24 VAC POWER
H
X END SWITCH
ZC ZR
ZONE1 ZONE2 ZONE3 120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
N
FUSE 1 AMP
H N
DHW Circ.
N
Boiler Sensor
Supply Sensor
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 58
Power Input
X - Pump Block (XPB) Back of Control Boiler Operation Off-Enable On-Control
Front of Control
R
C US 158033
Meets Class B: Canadian ICES FCC Part 15
Boiler
Power: 120 V + 10% 50/60 Hz, 750 VA Var. Speed: 120 V (ac) 1 A Pmp Relay: 120 V (ac) 5 A, 1/6 hp Use copper conductors only
Fuse
Manual Operation Switch
Sys MENU ITEM
Com Sup Sys Com Boil Out Com Heat Dem Ret
Heat Source
Y R B
H
X – PUMP BLOCK UL
PATENT PENDING
Pump
Var
XPB-1
Man
N
Line Cord System Supply Sensor Variable Speed Circulator
Heat Source Sensor
To Zone Control End Switch or Thermostat (Relay or Mechanical Type)
Outdoor Sensor
Heating: Heat Source Circulator Snowmelt: System Circulator
Constant Speed Circulator Heating: System Circulator Snowmelt: Heat Source Circulator
X - Pump Block, Single Zone Outdoor Sensor
Power Cord Boiler
XPB
Boiler Operation Off-Enable On-Control
Back of Control Thermostat (Relay or Mechanical Type)
Pump ComSup Sys Com Boil Out Com Heat Dem Ret
H
T
N
Pressure Relief
Exp Tank
HEAT SOURCE Input from Heat Source
Output to System
Supply Sensor
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 59
X - Pump Block Connected to Zone Valve Control Power H N Input Outdoor Sensor
T
Power Cord
Boiler Operation Off-Enable On-Control
Boiler
XPB
T
Factory Installed Transformer
ZONE 4 PRIORITY
MODE NORMAL RESET
T T ZONE 1
POWER IN
Back of Control
MAIN END SWITCH
H
EXTRA END SWITCH
T T ZONE 2
T T ZONE 3
T T ZONE 4
OFF ON
ZVC 404
FUSE (3 AMP MAX)
Pump ComSup Sys Com Boil Out Com Heat Dem Ret
T
FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 1 2 3 4 1 2 3 4 1 2 3 4
N/O COM N/C ZONE 4 RELAY
ZONE 4 1 2 3 4
N
Pressure Relief Radiant Manifold - Return
HEAT SOURCE
Exp Tank Output to System
Input from Heat Source
Supply Sensor Radiant Manifold - Supply
X - Pump Block Connected to 2 SR502/503 Switching Relays T T T 24 VAC POWER
ZONE1
SR 502
Power Cord
ZONE2
T
Outdoor Sensor
TWO ZONE SWITCHING RELAY FUSE 1 AMP
24 VAC POWER
ZONE1
SR 502
ZONE2
TWO ZONE SWITCHING RELAY N
P
ZC
H
X1
X2 ZR
ZONE1
ZONE2
Boiler
Power Input
XPB
Boiler Operation Off-Enable On-Control
FUSE 1 AMP
Back of Control
N
H N
P
ZC
H
X1
X2 ZR
Pump
ComSup Sys Com Boil Out Com Heat Dem Ret
H
Power Input
N
H N
Pressure Relief
Return Sensor
Exp Tank
Input from Heat Source
Output to System
Supply Sensor
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 60
ZONE1
ZONE2
Typical Radiant Floor to Water Heater Installation
Domestic Hot Supply
Cold Supply
X-PUMP BLOCK Relief Valve
Air Separator C MIX H
Return
ASSE 1017 Tempering Valve
Exp. Tank
RADIANT SYSTEM (Secondary Side of the System)
Supply Check Valve Hot
Cold
WATER HEATER
WARNING! A pressure relief valve and expansion tank must be installed on the secondary side in addition to any pressure relief valve and expansion tank which is installed on primary side of system. Use dedicated supply and return piping to the X-Pump Block from the water heater so as not to add heated water into the house’s cold water piping.
Typical Snow Melt Installation Separator SYSTEM RETURN SENSOR
Exp. Tank
Relief Valve
X-PUMP BLOCK
{
Note 3
{
Return Exp. Tank
{ }
{
Note 1
Note 2 Note 2
Note 1
{ Note 3
(Tb)
Air Separator
(Ts)
(ΔTs) SYSTEM SUPPLY SENSOR
Supply
HEAT SOURCE
HEAT SOURCE RETURN SENSOR (OPTIONAL)
Tb = Boiler Supply Temperature Ts = System Supply Temperature ΔTs = System Temperature Drop (typically 20°F for convectors and 10°F for radiant floor heating)
FIXED SPEED CIRCULATOR (4 PIN PLUG)
SNOW MELT SYSTEM
VARIABLE SPEED CIRCULATOR (3 PIN PLUG)
Note 1: There must be no more than 4 pipe diameters between the tees in the boiler and system loops in order to prevent ghost flow when the variable speed injection pump is off and either the boiler pump or system pump is on. Note 2: There must be at least 6 pipe diameters of straight pipe on either side of the tees in order to prevent the momentum of water in the boiler and system loops from pushing flow through the injection loop. Note 3: There should be a minimum 1 foot drop to create a thermal trap in order to prevent convective heat transfer through the injection loop.
61
iSeries Mixing Valve System Supply Sensor
Boiler Return Sensor
Back of Control
Boiler Return Sensor (optional)
BOILER SUPPLY SETBACK
C
POWER GREEN
R BOILER SUPPLY OUTDOOR
24 VAC POWER INPUT
SENSOR ERROR RED
SENSOR COMMON
Setback Input
Back of Control
System Supply Sensor
C
POWER GREEN
R
24 VAC POWER INPUT
SENSOR ERROR RED
SENSOR COMMON
Outdoor Sensor 24 V (ac) Transformer
or
End Switch
24 V (ac) Transformer
iValve-S
End Switch
or
iValve-R
iValve, 2-Way Injection, Single Zone Outdoor Sensor
Thermostat
T BACK OF iVALVE-R MIXING VALVE ACTUATOR
SENSOR COMMON
BOILER POWER SUPPLY GREEN OUTDOOR
24 VAC POWER INPUT
SR501 1 Z ONE SWIT CHING RELAY
R W T T
24 VAC COM
C R 24 Volt Transformer
120 VAC INPUT
SENSOR ERROR RED
N H 3
4
N/O
4
N/C
6
N/C
6
N/O
5
H N
Power Input
iSeries-R
A
B
Supply Sensor Boiler Sensor
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 62
iValve, 3-Way Mixing Working with SR502/503 Switching Relay with DHW Priority T DHW Aquastat Power Input H
Outdoor Sensor
T
A
24 VAC POWER
Z ONE1
SR 503
N
Z ONE2
Z ONE3
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP
BACK OF iVALVE-R MIXING VALVE ACTUATOR 24 Volt
Transformer
BOILER POWER SUPPLY GREEN OUTDOOR
Thermostats
N
24 VAC SENSOR COMMON POWER INPUT
P
ZC
H
X1
X2 ZR
Z ONE1
Z ONE2
Z ONE3
C R
SENSOR ERROR RED
DHW Circ.
Supply Sensor
iSeries-R
C C
B B A A
Boiler Sensor
iValve, 4-Way Mixing Working with Zone Valve Control BACK OF iVALVE-R MIXING VALVE ACTUATOR
M
24 Volt
Motor
End Switch
SENSOR ERROR RED
M
T T ZONE 1 FUSE (5 AMP MAX)
Transformer
C R
POWER IN
Power H Input N
24 VAC SENSOR COMMON POWER INPUT
E ND SWITCH
N/O COM N/C
T
Thermostats
T T ZONE 2
T T ZONE 3
ZVC 403 THREE ZONE ZONE VALVE CONTROL ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
End Switch
BOILER POWER SUPPLY GREEN OUTDOOR
Factory Installed Transformer
T
Motor
Outdoor Sensor
Supply Sensor
iSeries-R
Boiler Sensor
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 63
Wiring for Boilers with Honeywell Control Center Model R8285 or Equivalent
TACO LTR0243T-1
WH RED YEL GRN YEL
FACTORY WIRING
FEMALE CONNECTOR
MALE CONNECTOR
GROUND CONNECTION
Alternate Wiring
TACO LTR0243T-1
WH RED YEL GRN YEL
24 VAC CLASS 2 TRANSFORMER LIMIT CONTROLS HOT 120 VAC 24 VAC
COMMON
64
GAS VALVE
Wiring Boilers with a United Technologies Integrated Control Module and a Taco LTR0243U-1
INTEGRATED BOILER CONTROL
MALE CONNECTOR
FEMALE CONNECTOR FACTORY WIRING
BOILER MODULE WIRING HARNESS
Wiring Boilers with a United Technologies Ucontrol or other Integrated Control Modules which accept a 4-pin harness and a Taco LTR0243L-1
4-PIN CONNECTOR (#1)
4-PIN CONNECTOR (#2)
INTEGRATED CONTROL MODULE WIRING HARNESS
Wiring Instructions 1. Plug the 4-pin connector on the wiring harness (#1 as shown) into the integrated control module. 2. Plug the 4-pin connector on the wiring harness (#2 as shown) into the LTR.
65
Wiring Taco LN and LTA-2 Series Low Water Cutoffs Using Burner Circuit Power Source
*
*Factory Installed
NOTE: For 24 VAC models, LNA024xx and LTA0243S-2, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LNA120xx and LTA1203S-2, 120 VAC is supplied by an external circuit to terminals H and N.
Wiring Taco LN and LTA-2 Series Low Water Cutoffs Using Power Source Other Than Burner Circuit
NOTE: For 24 VAC models, LNA024xx and LTA0243S-2, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LNA120xx and LTA1203S-2, 120 VAC is supplied by an external circuit to terminals H and N.
66
Wiring Taco LT Series (1st generation, -1) Low Water Cutoffs Using Burner Circuit Power Source
* *Factory Installed
NOTE: For 24 VAC models, LTx024xx-1, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LTx120xx-1, 120 VAC is supplied by an external circuit to terminals H and N.
Wiring Taco LT Series (1st generation, -1) Low Water Cutoffs Using Power Source Other Than Burner Circuit
NOTE: For 24 VAC models, LTx024xx-1, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LTx120xx-1, 120 VAC is supplied by an external circuit to terminals H and N.
67
Wiring Taco LF Series Low Water Cutoffs Using Burner Circuit Power Source
NOTE: Remote probe available on remote probe models only. NOTE: For 24 VAC models, LFx024xx, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LFx120xx, 120 VAC is supplied by an external circuit to terminals H and N.
Wiring Taco LF Series Low Water Cutoffs Using Power Source Other Than Burner Circuit
NOTE: For 24 VAC models, LFx024xx, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LFx120xx, 120 VAC is supplied by an external circuit to terminals H and N.
68
Taco Low Water Cutoff Replacement Guide Taco LFA1203S-1 LTA1203N-1 LTA1203S-1
LFM1203S-1 LTM1203N-1 LTM1203S-1
LFA0243S-1 LTA0243N-1 LTA0243S-1 LFM0243S-1 LTM0243N-1 LTM0243S-1 LFA1203R-1 LTA1203R-1 LFM1203R-1 LTM1203R-1 LFA1202R-1 LTA1202R-1 LFM1202R-1 LTM1202R-1 LFA0242R-1 LTA0242R-1 LTA0243S-2 LNA0243S-1
LTA1203S-2 LNA1203S-1
LTR0243T-1 P3R-1
EWF120
EWF024
McDonnell & Miller PS-801-120 PSE-801-120 PS-800-120 PS-850-120 900 900C PS-801-M-120 PS-851-M-120 PS-851-SP-M-120 PS-850-M-120 900M 901M 902M PS-802-24 PSE-802-24 PS-800-24 PS-850-24 PS-802-M-24 PS-852-M-24 PS-852-SP-M-24 PS-850-M-24 750-T-120 750-120 750-MT-120 750-M-120
Hydrolevel
Honeywell
450 CG450 CGT450 OEM170TD
RW700A1031 RW700A1056 RW700A1080
550 550SV 750 OEM170MC OEM170M
RW700B1054 RW700B1039 RW700B1021
400 CG400 OEM24TD
RW700A1098
500 500SV 700 OEM24MC 650R 550R
PS-851-RX2-120
650R
PS-851-M-RX2-120
550R
PS-802-RX2-24
400R
PS-852-24 PS-852-SP-24 750-MT-SP-24 750P-MT-24 750P-MT-U-24 RB-120 RB-122E PS-851-120 PS-851-SP-120 750P-MT-120 750P-MT-SP-120 750P-MT-U-120 901 RB-120II RB-122 RB-24E RB-24
24 24SV 600 600SV OEM24C
RS-1-BR-1 RS-1-LP RS-1-LP-S WFE-120 WF2-U-120V WF-2-120 WF-4-120 WFE-24 WF2-U-24V WF-2-24 WF-4-24
Bold / Italics Indicates Discontinued Part Number
170 170SV 1150 650 650SV OEM170C OEM170
RW700A1007 RW700A1006
1100 EL1214-R
VRTX-120 V-120-1&2
VW400A1004
VRTX-24 V-24-1&2
VW800A1004
69
Taco LF Series 120 Volt LWCO Competitive Wiring Cross Reference 120 VAC Models with 120 VAC Burner Circuits McDONNELL & MILLER PS-801/851-120 w/Red & Amber LEDs Series 750
TACO LFx120x NC
NO COM
H
N
GND
P
1
2
3
4
5
HOT HOT BURNER CIRCUIT
120 VAC CIRCUIT
FACTORY INSTALLED JUMPER
BURNER CIRCUIT
120 VAC CIRCUIT NEUTRAL NEUTRAL
McDONNELL & MILLER PS-801/851-120 w/Red & Green LEDs
HYDROLEVEL 450, 550, 650 & 750 2
1
P1
P2
N
A
HOT
H
C
W
B
HOT BURNER CIRCUIT
120 VAC CIRCUIT
BURNER CIRCUIT
120 VAC CIRCUIT
NEUTRAL
NEUTRAL
120 VAC Models with 24 VAC Burner Circuits McDONNELL & MILLER PS-801/851-120 w/Red & Amber LEDs Series 750
TACO LFx120x NC
NO COM
H
N
GND
1
P HOT
BURNER CIRCUIT
120 VAC CIRCUIT
NEUTRAL
HOT 120 VAC CIRCUIT NEUTRAL
70
P2
A
BURNER CIRCUIT
24 VAC TRANSFORMER
5 BURNER CIRCUIT
24 VAC TRANSFORMER McDONNELL & MILLER PS-801/851-120 w/Red & Green LEDs
HYDROLEVEL 450, 550, 650 & 750 P1
4
HOT
24 VAC TRANSFORMER
1
3
120 VAC CIRCUIT NEUTRAL
2
2
N
H
C
W
HOT
BURNER CIRCUIT
120 VAC CIRCUIT NEUTRAL
B
24 VAC TRANSFORMER
Taco LF Series 24 Volt LWCO Competitive Wiring Cross Reference 24 VAC Models with 24 VAC Burner Circuits
TACO LFx024x NC
NO COM
H
N
GND
P HOT
BURNER CIRCUIT
24 VAC CIRCUIT
FACTORY INSTALLED JUMPER
NEUTRAL
McDONNELL & MILLER PS-802/852-24
HYDROLEVEL 400, 500, 600 & 700 2
1
P1
P2
N
A
HOT
H
C
W
B
HOT BURNER CIRCUIT
24 VAC CIRCUIT
BURNER CIRCUIT
24 VAC CIRCUIT
NEUTRAL
NEUTRAL
24 VAC Models with 120 VAC Burner Circuits
TACO LFx024x NC
NO COM
H
N
GND
P
HOT BURNER CIRCUIT
120 VAC CIRCUIT
24 VAC TRANSFORMER
NEUTRAL
McDONNELL & MILLER PS-802/852-24
HYDROLEVEL 400, 500, 600 & 700 2
1
P1
P2
HOT
N
A
C
W
B
HOT BURNER CIRCUIT
120 VAC CIRCUIT
BURNER CIRCUIT
120 VAC CIRCUIT
24 VAC TRANSFORMER NEUTRAL
H
24 VAC TRANSFORMER NEUTRAL
71
Taco LTA-2 Series 120 Volt LWCO Competitive Wiring Cross Reference 120 VAC Models with 120 VAC Burner Circuits McDONNELL & MILLER RB-120
TACO LTA1203S-2 N
H
COM NC
NO
1
HOT
2
3
4
5
HOT
120 VAC CIRCUIT
FACTORY INSTALLED JUMPER
BURNER CIRCUIT
BURNER CIRCUIT
120 VAC CIRCUIT
NEUTRAL
NEUTRAL
McDONNELL & MILLER RB-122E N
H
B
HYDROLEVEL 1150 H
C
HOT
N
HYDROLEVEL 170
CUT-OFF
GN
HOT BURNER CIRCUIT
120 VAC CIRCUIT
P1
P2
A
HOT BURNER CIRCUIT
120 VAC CIRCUIT
NEUTRAL
H
BURNER CIRCUIT
120 VAC CIRCUIT
NEUTRAL
NEUTRAL
120 VAC Models with 24 VAC Burner Circuits
McDONNELL & MILLER RB-120
TACO LTA1203S-2 N
H
COM NC
HOT
1
NEUTRAL
24 VAC TRANSFORMER
H
B
HOT 120 VAC CIRCUIT NEUTRAL
72
H
24 VAC TRANSFORMER
HOT 120 VAC CIRCUIT NEUTRAL
N
24 VAC TRANSFORMER
5
24 VAC TRANSFORMER
HYDROLEVEL 170SV
CUT-OFF
BURNER CIRCUIT
4
BURNER CIRCUIT
HYDROLEVEL 1150
C
BURNER CIRCUIT
3
120 VAC CIRCUIT
McDONNELL & MILLER RB-122E N
2
HOT
BURNER CIRCUIT
120 VAC CIRCUIT NEUTRAL
NO
GN HOT 120 VAC CIRCUIT NEUTRAL
H
P1
P2
A
BURNER CIRCUIT
24 VAC TRANSFORMER
Taco LTR and LTA-2 Series 24 Volt LWCO Competitive Wiring Cross Reference 24 VAC Models with 24 VAC Burner Circuits
McDONNELL & MILLER RB-24E
TACO LTA0243S-2 N
COM NC
H
Red White Yellow Yellow Wire Wire Wire Wire
NO
HOT
HOT
24 VAC CIRCUIT
BURNER CIRCUIT
FACTORY INSTALLED JUMPER
NEUTRAL
NEUTRAL
TACO LTR0243T-1
HYDROLEVEL 1100
Red White Yellow Yellow Wire Wire Wire Wire
Red White Yellow Yellow Wire Wire Wire Wire
HOT 24 VAC CIRCUIT
BURNER CIRCUIT
24 VAC CIRCUIT
24 VAC CIRCUIT
NEUTRAL
2
P1
1
P2
A
HOT
HOT BURNER CIRCUIT
HYDROLEVEL 24
BURNER CIRCUIT
24 VAC CIRCUIT
BURNER CIRCUIT
JUMPER
NEUTRAL
NEUTRAL
24 VAC Models with 120 VAC Burner Circuits
HYDROLEVEL 24
TACO LTA0243S-2 N
H
COM NC
2
NO
HOT
HOT
120 VAC CIRCUIT
120 VAC CIRCUIT
BURNER CIRCUIT
NEUTRAL 24 VAC TRANSFORMER
1
P1
P2
A
BURNER CIRCUIT
NEUTRAL 24 VAC TRANSFORMER
73
Wiring Taco LF Series Low Water Cutoffs to Taco Electric Water Feeder with the Same Voltages
EWF Standard Wiring Taco LFx120x / L F x024x
NC
NO
COM
H
N
GND
P
HOT BURN ER C IR C U IT
FACTORY INSTALLED JUMPER
120 V AC / 24 V A C C I R C U IT
NEUTRAL
LW
N
H
Taco E W F 120 /E W F 024
Wiring Taco LF Series Low Water Cutoffs to Taco Electric Water Feeder with Different Burner Voltages
EWF Alternate Wiring
T a c o L F x 02 4 x
T a co L F x1 2 0 x NC
NO
COM
H
* B UR NE R CI RC UI T
N
GND
P
NC
NO
COM
*
HO T 12 0 V A C C IR C U IT
B UR NE R CI RC UI T
LW
T a co E W F 0 2 4
24 V AC C IR C U IT
NE U TR AL
P
HO T
HO T
H
N
LW
T a co E W F 1 2 0
* N O T E : R e m o v e f a c to r y i n s t a ll e d ju m p e r b etw e e n H a n d C O M t e r m in a ls
74
GND
NE U TR AL
HO T
N
N
24 V AC C IR C U IT
NE U TR AL
H
H
12 0 V A C C IR C U IT
NE U TR AL
Wiring Taco 24VAC Electric Water Feeder to Taco LF Series 24VAC Low Water Cutoff or 24VAC McDonnell & Miller or Hydrolevel Low Water Cutoffs
M c D o n n e l l & M il l e r P S -8 0 2 /8 5 2 -2 4
B
W
C
H
N
H yd ro le v e l 400, 50 0, 600, & 700
P2
A
P1
1
2
Taco LFx024x
NC
NO
COM
H
N
GND
P
HOT B UR N E R C IR C U IT
** Ma y be fa ctory installed on som e L W C O s
24 V A C C IR C U IT
INSTALLED JUMPER **
N O T E : Wiring s hown only for control an d burner circuits of the sam e volta ge. S om e term ina l designations ar e n ot in their actual order on the LW C O s.
NEUTRAL
LW
N
H
Taco EW F 024
Wiring Taco 120VAC Electric Water Feeder to Taco LF Series 120VAC Low Water Cutoff or 120VAC McDonnell & Miller or Hydrolevel Low Water Cutoffs
M c D o n n e ll & M ill e r P S -8 0 1 /8 5 1 -1 2 0 w /R e d & A m b e r L E D s , S e rie s 7 5 0
5
4
3
1
2
M c D o n n e ll & M ill e r P S -8 0 1 /8 5 1 -1 2 0 w /R e d & G r e e n L E D s
B
W
C
H
N
H yd ro le v e l 450, 55 0, 650, & 750
P2
A
P1
1
2
Taco LFx120x
NC
NO
COM
H
N
GND
P
HOT B UR N E R C IR C U IT
INSTALLED JUMPER **
120 V A C C IR C U IT
NEUTRAL
LW
N
** Ma y be fa ctory installed on som e L W C O s N O T E : W iring s hown only for control an d burner circuits of the sam e volta ge. S om e term ina l designations are n ot in their actual order on the LW C O s.
H
Taco EW F 120
75
Wiring TACO LTA-2 or LF Series 24VAC Low Water Cutoff to McDonnell & Miller Series WF2 Uni-Match Electric Water Feeder SWITCH POSITION #2 1
UNI-MATCH WATER FEEDER MODEL WF2-U-24
24VAC SUPPLY 50/60 Hz
2
3
0R
W
N
M&M 2 3
H
N Note on switch position:
H BURNER
N
H
If using the LTA-2 series, choose whichever position best matches the application:
NC NO
COM
Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle.
AC POWER OUTPUT CONTACTS
24 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages.
WF-2 switch to position 1 - 60 sec. delay, 90 sec. feed, repeats WF-2 switch to position 2 - 90 sec. delay, 90 sec. feed WF-2 switch to position 3 - 100 sec. delay, 90 sec. feed
Do not connect feeder to a manual reset LWCO.
Wiring TACO LTA-2 or LF Series 120VAC Low Water Cutoff to McDonnell & Miller Series WF2 Uni-Match Electric Water Feeder SWITCH POSITION #2 1
UNI-MATCH WATER FEEDER MODEL WF2-U-120
120VAC SUPPLY 50/60 Hz
2
3
0R
W
N
M&M 2 3
H
N
Note on switch position:
H BURNER
Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle. If using the LTA-2 series, choose whichever position best matches the application:
N
H
COM
NC NO
AC POWER OUTPUT CONTACTS
120 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO. 76
WF-2 switch to position 1 - 60 sec. delay, 90 sec. feed, repeats WF-2 switch to position 2 - 90 sec. delay, 90 sec. feed WF-2 switch to position 3 - 100 sec. delay, 90 sec. feed
Wiring TACO LF Series 24VAC Low Water Cutoff to Hydrolevel VXT-24 Water Feeder (Non-Display Model) Set Safgard as desired.
SAFGARD VXT-24 WATER FEEDER WHITE
BLACK
N
24VAC SUPPLY 50/60 Hz
H
Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages.
BURNER
N
H
COM
NC NO
AC POWER OUTPUT CONTACTS
Do not connect feeder to a manual reset LWCO.
24 VAC LWCO Using Burner Circuit Power Source
Wiring TACO LF Series 120VAC Low Water Cutoff to Hydrolevel VXT-120 Water Feeder (Non-Display Model) Set Safgard as desired.
SAFGARD VXT-120 WATER FEEDER WHITE
120VAC SUPPLY 50/60 Hz
BLACK
N H
Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages.
BURNER
N
H
COM
NC NO
AC POWER OUTPUT CONTACTS
Do not connect feeder to a manual reset LWCO.
120 VAC LWCO Using Burner Circuit Power Source
77
Wiring TACO LTA-2 or LF Series 24VAC Low Water Cutoff to Hydrolevel VXT-24 Programmable Water Feeder (Model with Display) Set Safgard as desired.
SAFGARD VRTX-24 WATER FEEDER WHITE
24VAC SUPPLY 50/60 Hz
BLACK
RED
N H
Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages.
BURNER
N
H
COM
NC NO
AC POWER OUTPUT CONTACTS
Do not connect feeder to a manual reset LWCO.
24 VAC LWCO Using Burner Circuit Power Source
Wiring TACO LTA-2 or LF Series 120VAC Low Water Cutoff to Hydrolevel VXT-120 Programmable Water Feeder (Model with Display) Set Safgard as desired.
SAFGARD VRTX-120 WATER FEEDER WHITE
120VAC SUPPLY 50/60 Hz
BLACK
RED
N H
Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages.
BURNER
N
H
COM
NC NO
AC POWER OUTPUT CONTACTS
Do not connect feeder to a manual reset LWCO.
120 VAC LWCO Using Burner Circuit Power Source
78
RB-120
RB-24
24
170
1100
1150
McDonnell & Miller
McDonnell & Miller
Hydrolevel
Hydrolevel
Hydrolevel
Hydrolevel
Hydrolevel
Hydrolevel
RW700A1098
400, 500, 600, 700, 450, 550, 650, 750 RW700 Series (Except RW700A1098)
RB-122
McDonnell & Miller
Hydrolevel
Series 750
McDonnell & Miller
McDonnell & Miller
McDonnell & Miller
McDonnell & Miller
PS-801/851 (Older Models w/Red & Amber LEDs) PS-801/851 (New Models w/Red & Green LEDs) PS-802/852 (Older Models w/Red & Amber LEDs) PS-802/852 (Older Models w/Red & Green LEDs)
LTR Series
Taco
McDonnell & Miller
LTA-2 & LN Series
Taco
Device or Series
LF & LT-1 Series
Manufacturer
T1
L1
T2
L2
2
N (White Wire)
H (Black Wire) 1
White Wire
GN
2
White Wire
Red Wire
H
1
Red Wire
2
N (White Wire)
H (Black Wire) 1
2
N
N
N
2
White Wire
N
N
Neutral
1
H
H
H
1
Red Wire
H
H
Hot
Power Connections
—
—
P1
CUT-OFF (Yellow Wire)
Yellow Wire
P1
P1
Yellow Wire
3
C (Yellow Wire)
3
C
C
C
3
Yellow Wire
COM
COM
Common
B
B
P2
CUT-OFF (Yellow Wire)
Yellow Wire
P2
P2
Yellow Wire
4
B (Yellow Wire)
5
B
B
B
5
Yellow Wire
NC
NC
To Burner Circuit
A
A
A
—
—
A
A
—
5
—
4
W
W
W
4
—
NO
NO
To EWF’s LW Terminal/Alarm
Output Contacts
2 Red Wires, White Wire 2 Red Wires, White Wire
H3
—
—
—
—
—
—
—
P
J3
J7
J2
P or J2
—
—
P
Probe
Green Wire
Green Wire
Chassis GND
—
—
—
—
—
—
—
Chassis GND
Chassis GND
Chassis GND
Chassis GND
Chassis GND
—
—
GND
Probe Preference
Remote Probes
Taco LTR, LN, LT-1, LTA-2 & LF Series Low Water Cutoff and Taco Electric Water Feeder Wiring Cross Reference
Taco
79
Aquastat Wiring L1 (HOT)
L2 (NEUTRAL) 120 VAC INPUT
L1
T
L2
TACO ZONE CONTROL
T END SWITCH
C1
B2
ZC
C2
ZR
B1
CIRCULATOR ON BOILER (IF ATTACHED)
HONEYWELL L8124A & C OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
MILLI-VOLTAGE GAS VALVE
B1
T
B2
TACO ZONE CONTROL
T END SWITCH
C
L1
L1 (HOT)
TV
L2
CIRCULATOR ON BOILER (IF ATTACHED)
C2
L2 (NEUTRAL)
120 VAC INPUT
HONEYWELL L8124B OR EQUAL
TACO ZONE CONTROL
Z
T
END SWITCH CIRCULATOR ON BOILER (IF ATTACHED)
B1
C2
L1
L2
B2
LOW VOLTAGE GAS VALVE
80
C1
L1 (HOT)
120 VAC INPUT
L2 (NEUTRAL)
HONEYWELL L8124E OR EQUAL
Aquastat Wiring
TV
TACO ZONE CONTROL
Z
T
END SWITCH
L1
ZC
ZR
B1
L2
B2 C2
C1
LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
120 VAC INPUT
L1 (HOT)
CIRCULATOR ON BOILER (IF ATTACHED)
L2 (NEUTRAL)
L1 (HOT)
HONEYWELL L8124G & L OR EQUAL
L2 (NEUTRAL) 120 VAC INPUT
L1
T
L2
TACO ZONE CONTROL
T END SWITCH
B2
C1
ZC
C2
ZR
B1
CIRCULATOR ON BOILER (IF ATTACHED)
L1 (HOT)
HONEYWELL L8124M OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
L2 (NEUTRAL) 120 VAC INPUT
L1
T
L2
TACO ZONE CONTROL
T END SWITCH
3
C1
C2
B1
CIRCULATOR ON BOILER (IF ATTACHED)
B2
LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
HONEYWELL L8148A OR EQUAL
81
Aquastat Wiring
TV
TACO ZONE CONTROL
T
W
END SWITCH CIRCULATOR ON BOILER (IF ATTACHED)
Z
B1
C1
C2
L1
L2
B2
TV
W
TP
Z
120 VAC INPUT
L1 (HOT)
LOW VOLTAGE GAS VALVE
L2 (NEUTRAL)
HONEYWELL L8148E OR EQUAL
TACO ZONE CONTROL
T END SWITCH
MILLIVOLTAGE GAS VALVE
B1
B2
CIRCULATOR ON BOILER (IF ATTACHED)
C2
L1
L2
B3
LOW VOLTAGE GAS VALVE
OR
C1
L1 (HOT)
L1 (HOT)
120 VAC INPUT
L2 (NEUTRAL)
HONEYWELL L8148J OR EQUAL
L2 (NEUTRAL) 120 VAC INPUT
L1
B1
L2
B2 C2
TACO ZONE CONTROL
OIL BURNER AND IGNITION END SWITCH
C1 ZC
CIRCULATOR ON BOILER (IF ATTACHED)
ZR T
T
F
F
CAD CELL
82
HONEYWELL L8182D OR EQUAL
Aquastat Wiring
L1 (HOT)
L2 (NEUTRAL)
120 VAC INPUT
L1
T
L2
TACO SWITCHING RELAY
T END SWITCH X X
T
ZC
ZR
N
H
THERMOSTAT (IF INDEPENDENT ZONE)
C1
B2
ZC
C2
ZR
B1
CIRCULATOR ON BOILER (IF ATTACHED)
THERMOSTAT (IF INDEPENDENT ZONE)
T
TV
HONEYWELL L8124A & C OR EQUAL
LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
END SWITCH X X
Z
T
L1
ZC
ZR
B1
L2
B2 C2
C1
120 VAC INPUT
CIRCULATOR ON BOILER (IF ATTACHED)
L2 (NEUTRAL)
L1 (HOT)
TACO SWITCHING RELAY ZC
ZR
N
H
LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
HONEYWELL L8124G & L OR EQUAL
L1 (HOT)
120 VAC INPUT
L1
L2 (NEUTRAL) T
L2
TACO SWITCHING RELAY
T
T
END SWITCH X X
ZC
ZR
N
H
THERMOSTAT (IF INDEPENDENT ZONE)
C1
B2
C2
ZC ZR
CIRCULATOR ON BOILER (IF ATTACHED)
B1
LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
HONEYWELL L8124M OR EQUAL
83
Aquastat Wiring
L1 (HOT) 120 VAC
L2 (NEUTRAL)
INPUT
L1
T
L2
R B2
3
W
B
B L6006 LOW LIMIT CONTROLER
TACO SWITCHING RELAY
T
T
END SWITCH X X
ZC
ZR
N
H
THERMOSTAT (IF INDEPENDENT ZONE)
R C2
C1
B2
B1
LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE
CIRCULATOR ON BOILER (IF ATTACHED)
L1 (HOT)
L2 (NEUTRAL)
120 VAC INPUT
L1
HONEYWELL L8148A OR EQUAL
B1
L2
B2 C2 C1 ZC
OIL BURNER AND IGNITION
CIRCULATOR ON BOILER (IF ATTACHED)
END SWITCH X X
TACO SWITCHING RELAY ZC
ZR
N
H
ZR T
T
T
84
F THERMOSTAT (IF INDEPENDENT ZONE)
F
CAD CELL
HONEYWELL L8182D OR EQUAL
Wiring for Boilers with Honeywell Aquastat Model L8124E or Equivalent FACTORY WIRING (unplug from B1 terminal)
TACO LTR0243T-1
WH RED YEL GRN YEL
TV
Z
T
CIRCULATOR ON BOILER (IF ATTACHED)
HONEYWELL L8124E
B1
C1
C2
L1
L2
MALE CONNECTOR
B2 G
L1 (HOT)
FEMALE CONNECTOR
L2 (NEUTRAL) 120 VAC INPUT
NOTE: The green wire must be connected to a ground source electrically common to the boiler ground.
Wiring for Boilers with Honeywell Aquastat Model L8148E or Equivalent TACO LTR0243T-1
FACTORY WIRING (unplug from B1 terminal)
WH RED YEL GRN YEL
TV
T
W
Z CIRCULATOR ON BOILER (IF ATTACHED)
HONEYWELL L8148E B1
C1
C2
L1
L2
B2 G L1 (HOT)
FEMALE CONNECTOR
MALE CONNECTOR
L2 (NEUTRAL) 120 VAC INPUT
NOTE: The green wire must be connected to a ground source electrically common to the boiler ground.
85
Aquastat Wiring to 24VAC Low Water Cutoff TO THERMOSTAT
TACO LNA024 or LTA024-2
N
TV
COM NC NO
HONEYWELL L8148E
T
W
H
Z
B
CIRCULATOR ON BOILER (IF ATTACHED)
R
B1
C1
C2
L1
L2
B2
SPILL SWITCH
L1 (HOT)
G
L2 (NEUTRAL) 120 VAC INPUT
LOW VOLTAGE GAS VALVE
Aquastat Wiring to 120VAC Low Water Cutoff TO THERMOSTAT
TACO LNA120 OR LTA120-2
N
TV
HONEYWELL L8148E
T
W Z
CIRCULATOR ON BOILER (IF ATTACHED)
B R
B1
C1
C2
L1
L2
B2
G
SPILL SWITCH
LOW VOLTAGE GAS VALVE
86
L1 (HOT)
L2 (NEUTRAL) 120 VAC INPUT
H
COM NC NO
Instruction Sheet SR501 Switching Relay Typical Wiring
Features: External Indicator Lights Universal Replaceability Snap-in PC Board Simplified Wiring Fully Enclosed Snap-Out Relays 100% Factory Tested Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty Made in the USA
Alternative Wiring
THERMOSTAT
SR501 1 ZONE SWITCHING RELAY
SR501 1 ZONE SWITCHING RELAY
24 R W VAC COM T T
24 R W VAC COM T T
POWER
POWER
T STAT
T STAT
120 VAC INPUT
Operation: Connect a thermostat to the “T T” terminals on the switching relay. When the thermostat calls for heat, the relay is energized and power is given to the circulator.
THERMOSTAT
120 VAC INPUT
4 4 6 6 5 N H 3 N/O N/C N/C N/O
4 4 6 6 5 N H 3 N/O N/C N/C N/O
JUMPER
TO: ZC
TO: TT ON BOILER
Power Input: Connect 120 volt ac power to terminals N and H.
TO: 120 VAC POWER
TO: 120 VAC POWER
CIRCULATOR
Jumper Placement: The jumper is factory installed between terminals H and 3 to switch power on terminals 4 n/o and 4 n/c.
TO: ZR
CIRCULATOR
Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death.
External Diagnostics: The External lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized.
Terminal Description: T&T Thermostat Connection COM Common side of transformer, to power some setback thermostats N Neutral wire of power input H Hot wire of power input 3 Common terminal for 4 n/o and 4 n/c 4 n/o Normally open terminal 4 n/c Normally closed terminal 6 n/c Normally closed terminal 6 n/o Normally open terminal 5 Common terminal for 6 n/o and 6 n/c
The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.
TACO SR501 REPLACEMNENT CROSS-REFERENCE
Specifications: PRODUCT NUMBER SR501
NUMBER TRANSFORMER OF ZONES VOLTAGE 1 Zone
120 VAC Input
MAXIMUM COMBINED LOAD 7.2 amps
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4"
5 1/4"
2 3/4"
All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.
Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
MANUFACTURER
MODEL
Taco
SR501
CONNECTIONS H
N
3
4 NO 4 NC 5
6 NO
Argo
AR821
1
2
3
4
6
5
6 NC
R/T
W/T C
T
AR822
L1 L2 3
4 NO 4 NC 5
6 NO
6 NC
R/T
G/T
C
Colombus
MR10
L1 L2 3
4 NO 4 NC 5
6 NO
6 NC
R/T
G/T
C
Erie
SR100
L1 L2 3
4 NO 4 NC 5
6 NO
6 NC
R/T
G/T
C
Honeywell
RA89A
1
2
3
4
T
T
RA832A
1
2
3
4
X
X
T
T
R845A
1
2
3
4
5
6
T
T
889-189
1
2
3
4
T
T
829-845
1
2
3
4
T
T
White-Rogers
5
Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
6
Printed in USA Copyright 2005 TACO, Inc.
Visit our web site at: http://www.taco-hvac.com
87
Instruction Sheet SR501-845RP Universal Replacement Relay Alternative Wiring
THERMOSTAT
REPLACES HONEYWELL R845, RA89A & RA832 OR COMPARABLE RELAY
THERMOSTAT
REPLACES HONEYWELL R845, RA89A & RA832 OR COMPARABLE RELAY
Features: Universal Replaceability Indicator Lights Snap-in PC Board to Existing Enclosure Simplified Wiring Fully Enclosed Snap-Out Relay 100% Factory Tested Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty Made in the USA
Typical Wiring
R W T T
R W T T POWER
POWER
UNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP
UNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP
T STAT
120 VAC INPUT
120 VAC INPUT
L2 L1 3 4 5 6
L2 L1 3 4 5 6
Operation: Connect a thermostat to the “T T” terminals on the switching relay. When the thermostat calls for heat, the relay is energized and power is given to the circulator.
T STAT
TO: TT ON BOILER TO: ZC
CIRCULATOR
TO: ZR
CIRCULATOR
JUMPER
Power Input: Connect 120 volt ac power to terminals L1 and L2. Jumper Placement: The jumper is factory installed between terminals L1 and 3 to switch power on terminal 4. Diagnostics: The Indicator lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.
Terminal Description: T&T L2 L1 3 4 6 5
Thermostat Connection Neutral wire of power input Hot wire of power input Common terminal for 4 Normally open terminal Normally open terminal Common terminal for 6
TO: 120 VAC POWER
TO: 120 VAC POWER
Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death.
Specifications: PRODUCT NUMBER
NUMBER OF ZONES
SR501-845RP
1 Zone
TRANSFORMER MAXIMUM VOLTAGE COMBINED LOAD
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH
120 VAC Input
4 1/4"
7.2 amps
TACO SR501-845RP REPLACEMENT CROSS-REFERENCE MANUFACTURER MODEL
CONNECTIONS
Taco
SR501-845RP
L1
L2
3
4
5
6
R/T
Argo
AR821
1
2
3
4
5
6
T
W/T
AR822
L1
L2
3
4 NO
5
6 NO
R/T
G/T
Colombus
MR10
L1
L2
3
4 NO
5
6 NO
R/T
G/T
Erie
SR100
L1
L2
3
4 NO
5
6 NO
R/T
G/T
Honeywell
RA89A
1
2
3
4
RA832A
1
2
3
4
X
R845A
1
2
3
4
5
889-189
1
2
3
4
829-845
1
2
3
4
White-Rogers
5
T
T
X
T
T
6
T
T
6
T
T
T
T
Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
88
2 3/4"
All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.
Do it Once. Do it Right.® Visit our web site at: http://www.taco-hvac.com
5 1/4"
Printed in USA Copyright 2005 TACO, Inc.
Instruction Sheet SR502 & SR503 Switching Relay Cold Start Boiler Application
Tankless Coil Boiler Application
THERMOSTATS
THERMOSTATS
24 VAC POWER
24 VAC POWER
SR 503
ZONE1
ZONE2
SR 503
ZONE3
ZONE1
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP
N P ZC H
ZONE3
FUSE 1 AMP
POWER ZONE 1 ZONE 2 ZONE 3
X2 X1 ZR ZONE1 ZONE2
ZONE2
THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
N P ZC H
ZONE3
POWER ZONE 1 ZONE 2 ZONE 3
X2 X1 ZR ZONE1 ZONE2
ZONE3
JUMPERS
JUMPERS
TO: 120 VAC POWER (NEUTRAL)
TO: 120 VAC POWER (NEUTRAL)
TO: 120 VAC POWER (HOT)
TO: 120 VAC POWER (HOT) 120 VOLT CIRCULATORS
TO: "TT" ON AQUASTAT CONTROL
TO: "ZC" ON AQUASTAT CONTROL
120 VOLT CIRCULATORS
TO: "ZR" ON AQUASTAT CONTROL
TO: "TT" ON AQUASTAT CONTROL
Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When the thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X1 and X2) will start the boiler. Jumper Placement: The jumper should be placed between terminals ZC and H. Connect the isolated end switch, X1 and X2 to the boiler aquastat control. For zone 1 priority, remove jumper between terminals P and ZC.
Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. Specifications: PRODUCT NUMBER
NUMBER OF ZONES
TRANSFORMER VOLTAGE
MAXIMUM COMBINED LOAD
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH
SR502 SR503
2 with Priority 3 with Priority
120 VAC Input 120 VAC Input
15 amps 15 amps
10 1/4" 10 1/4"
6 3/4" 6 3/4"
2 3/4" 2 3/4"
All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.
Operation: When any thermostat calls for heat, the boiler and appropriate circulator are energized when the boiler temperature is above the set low limit. Jumper Placement: A jumper should be placed between terminals ZC and X1. Connect terminal ZC to ZC terminal on the aquastat control. Connect terminal ZR to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. For zone 1 priority, remove jumper between terminals P and ZC. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Features:
External Indicator Lights Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA
Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Printed in USA Copyright 2005 TACO, Inc.
Visit our web site at: http://www.taco-hvac.com
89
Instruction Sheet SR504 & SR506 Switching Relay THERMOSTATS
THERMOSTATS
Tankless Coil Boiler Application
Cold Start Boiler Application
SR 506
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
ZONE 6 PRIORITY ON
X
X
END SWITCH
ZC ZR
120 VOLT CIRCULATORS
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC POWER
POWER INPUT
OFF
120V RELAY
ZONE 5 ZONE 6 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
ZONE 6 PRIORITY ON
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4
120V RELAY
24 VAC POWER
SR 506
OFF
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
X
X
END SWITCH
ZONE 5 ZONE 6
ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP
FUSE 1 AMP
TO: "ZR" ON AQUASTAT
JUMPER
JUMPER
TO: "TT" ON BOILER TO: "ZC" ON AQUASTAT
120 VAC INPUT
120 VAC INPUT
Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When any thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Jumper Placement: The jumper should be placed between terminals ZC and ZR. Connect the isolated end switch to the aquastat control on the boiler.
Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized.
Specifications: PRODUCT NUMBER
NUMBER OF ZONES
TRANSFORMER VOLTAGE
MAXIMUM COMBINED LOAD
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH
SR504 SR506
4 with Priority 6 with Priority
120 VAC Input 120 VAC Input
20 amps 20 amps
10 1/4" 11 3/4"
6 3/4" 7 1/2"
2 3/4" 3"
All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.
Operation: When any thermostat calls for heat, the boiler and appropriate circulator are energized when the boiler temperature is above the set low limit. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Jumper Placement: MOVE the jumper between terminals ZC and ZR to end switch X and ZC. Connect terminal ZC to ZC terminal on the aquastat control. Connect the other end switch X to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Features:
External Indicator Lights Switchable Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA
Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com
90
Printed in USA Copyright 2005 TACO, Inc.
Instruction Sheet SR501-EXP Switching Relay Cold Start Boiler Application
Tankless Coil Boiler Application
THERMOSTAT
T
THERMOSTAT
T
TO: DHW Aquastat if PC700 Boiler Reset is installed.
TO: "TT" on Boiler Aquastat
TO: DHW Aquastat if PC700 Boiler Reset is installed.
POWER CONTROLS
POWER CONTROLS
MODE
MODE END SWITCH
EXPANSION
X X 1 2 3 4 FUSE 1 AMP
K1-A
THERMOSTAT
RESET OVERRIDE
T/R T/W COM
1 2
MASTER
K2
K1-B
K2-A
THERMOSTAT
RESET OVERRIDE
T/R T/W COM
1 2
RESET
NORMAL
MASTER
K1
SLAVE
T STAT
H ZC ZR H
POWER INPUT
K1-A
POWER
FUSE 5 AMP
N
EXPANSION
X X 1 2 3 4 FUSE 1 AMP
NORMAL
K1
SLAVE
END SWITCH
RESET
K2
POWER T STAT
FUSE 5 AMP
K2-A
K1-B
H
N
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
POWER INPUT
SR 501-EXP
K2-A
H ZC ZR H
K2-A
H
120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT
SR 501-EXP
TO: ZC on Boiler Control
JUMPER CIRCULATOR
TO: ZR on Boiler Control CIRCULATOR
TO: 120 VAC POWER
TO: 120 VAC POWER
Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When the thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler. Priority Output has power all the time, except when the thermostat is calling. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized through the operation of a plug-in reset control or closure of Priority Input. Jumper Placement: The jumper should be placed between terminals ZC and H. Connect the isolated end switch to the aquastat control on the boiler.
Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls.
Features: External Indicator Lights Ideal for Retrofitting Priority Output Simplified Wiring Add-On Power Controls Sealed Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch
Expandable to 20 Zones Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA
Operation: When the thermostat calls for heat, the appropriate circulator is energized when the boiler’s aquastat is above the set low limit. The ZR (120VAC) output will signal the boiler to start. Priority Output has power all the time, except when the thermostat is calling. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized through the operation of a plug-in reset control or closure of Priority Input. Jumper Placement: REMOVE the jumper between terminals ZC and H. Connect terminal ZC to ZC terminal on the aquastat control. Connect terminal ZR to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light are energized. Specifications: PRODUCT NUMBER
NUMBER OF ZONES
SR501-EXP
1
POWER CONTROLS 1
TRANSFORMER VOLTAGE 120 VAC Input
MAXIMUM COMBINED LOAD 5.0 amps
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4"
5 1/4"
2 3/4"
All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (5.0A) @ 120 VAC.
Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only with a minimum temperature rating of 60/75°C. Failure to follow this instruction can result in personal injury or death and/or property damage. 12-18 gauge wire recommended for 120 VAC connections, 14-22 gauge wire for thermostat connections, and 14-22 gauge wire for 24 VAC source connections.
Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Printed in USA Copyright 2005 TACO, Inc.
Visit our web site at: http://www.taco-hvac.com
91
Instruction Sheet SR503-EXP, SR504-EXP & SR506-EXP Switching Relay Cold Start Boiler Application
Tankless Coil Boiler Application
THERMOSTATS
EXPANSION CONNECTIONS 1234
SLAVE
POWER CONTROL INTERFACE
EXPANSION CONNECTIONS PLUG-IN CARDS
MASTER
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
RESET
24 VAC POWER
NORMAL
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
120V RELAY
X
THERMOSTATS
X
END SWITCH
ZONE 6 PRIORITY ON OFF
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
SR 506-EXP ZC ZR
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
1234
SLAVE
POWER CONTROL INTERFACE
PLUG-IN CARDS
MASTER
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
RESET
24 VAC POWER
SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY
120V RELAY
X
POWER INPUT
POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
SR 506-EXP
X
ZC ZR
END SWITCH
FUSE 1 AMP
NORMAL
ZONE 6 PRIORITY ON OFF
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
120 VOLT CIRCULATORS
POWER INPUT
FUSE 1 AMP TO: "ZR" ON AQUASTAT JUMPER
JUMPER TO: "TT" ON BOILER
120 VAC INPUT
120 VAC INPUT
TO: "ZC" ON AQUASTAT
Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When any thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler.
Operation: When any thermostat calls for heat, the boiler and appropriate circulator are energized when the boiler temperature is above the set low limit.
Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently.
Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently.
Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation, or through the operation of a plug-in reset control.
Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation, or through the operation of a plug-in reset control.
Jumper Placement: The jumper should be placed between terminals ZC and ZR. Connect the isolated end switch to the aquastat control on the boiler.
Jumper Placement: MOVE the jumper between terminals ZC and ZR to end switch X and ZC. Connect terminal ZC to ZC terminal on the aquastat control. Connect the other end switch X to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay.
Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.
Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H.
Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls.
Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls.
Features: External Indicator Lights Plug-In PowerPort Cards Switchable Priority Simplified Wiring Add-On Power Controls Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested
External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized.
Isolated End Switch Expandable to 20 Zones Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA
Specifications: PRODUCT NUMBER
NUMBER OF ZONES
POWER PORTS
TRANSFORMER VOLTAGE
MAXIMUM COMBINED LOAD
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH
SR503-EXP SR504-EXP SR506-EXP
3 with Priority 4 with Priority 6 with Priority
3 3 3
120 VAC Input 120 VAC Input 120 VAC Input
20 amps 20 amps 20 amps
10 1/4" 10 1/4" 11 3/4"
6 3/4" 6 3/4" 7 1/2"
2 3/4" 2 3/4" 3"
All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.
Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com
92
Printed in USA Copyright 2005 TACO, Inc.
Instruction Sheet ZVC403 & ZVC405 Zone Valve Control THERMOSTAT
THERMOSTAT
WHITE
24 VAC
T T ZONE 1 FUSE (5 AMP MAX)
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
WHITE
24 VAC
END SWITCH
Installation of Optional System Circulator
T T ZONE 2
T T
ZONE 2 1 2 3 4
T STAT 1
T T ZONE 5
VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
VALVE 4 T STAT 5 VALVE 5 POWER
ZONE 5 1 2 3 4
JUMPER 3&4
1 2 3
DRY CONTACTS
N/O COM N/C
2 WIRE ZONE VALVE (NO END SWITCH)
T T
T T ZONE 4
FIVE ZONE ZONE VALVE CONTROL
ZONE 1 1 2 3 4
N/O COM N/C
T T ZONE 3
ZVC 405
TO CIRCULATOR OR BOILER AQUASTAT RELAY END SWITCH
THERMOSTAT
24 VAC
POWER IN
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
Wiring Diagram
MOTOR
TACO 3 WIRE ZONE VALVE
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
HOT BOILER
120 VAC NEUTRAL
Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relay. The green light should always be on, indicating that power is connected. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
Specifications: PRODUCT NUMBER
NUMBER OF ZONES
TRANSFORMER VOLTAGE
MAX OUTPUT AT 24 VAC
ZVC403 ZVC405
3 Zone 5 Zone
120 VAC Input 120 VAC Input
40 VA 80 VA
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 10 1⁄4" 113⁄4"
6 3⁄4" 71⁄2"
2 3⁄4" 3"
All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄ hp (5A) @ 120 VAC. 6
Features: External Indicator Lights Simplified Wiring Works with 2, 3, or 4Wire Zone Valves Compact Design Fuse Protected 100% Factory Tested Isolated End Switch
Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Sturdy Screw Connections Extended 3 Year Warranty Made in the USA
Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Printed in USA Copyright 2000 TACO, Inc.
Visit our web site at: http://www.taco-hvac.com
93
Instruction Sheet ZVC404 & ZVC406 Zone Valve Control Wiring Diagram
24 VAC
24 VAC
T T ZONE 1
24 VAC
Installation of Optional System and/or DHW Circulator
EXTRA MAIN END END SWITCH SWITCH
N/O COM N/C ZONE 6 RELAY
T T
T T ZONE 2
SYSTEM CIRCULATOR DHW CIRCULATOR
T T ZONE 4
T T ZONE 5
T T ZONE 6
SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 1 2 3 4
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4
ZVC 406
ZONE 5 1 2 3 4
VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER
ZONE 6 1 2 3 4
JUMPER 3&4
SEE NOTE
PRIORITY ZONE
DRY CONTACTS
BOILER
T T ZONE 3
JUMPER 3&4
TO CIRCULATOR OR BOILER AQUASTAT RELAY
N/O COM N/C
OFF ON
FUSE (7 AMP MAX)
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
WHITE
ZONE 6 PRIORITY
MODE
NORMAL RESET
POWER IN
FACTORY INSTALLED TRANSFORMER
WHITE
T T
THERMOSTAT INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
120 VAC INPUT BLACK
EXTRA MAIN END END SWITCH SWITCH
THERMOSTAT
THERMOSTAT
1 2 3 2 WIRE ZONE VALVE (NO END SWITCH)
TACO 3 WIRE ZONE VALVE
MOTOR
END SWITCH
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
(See Note)
NEUTRAL 120 VAC HOT
Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relay. The green light should always be on, indicating that power is connected. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.
Specifications: PRODUCT NUMBER
NUMBER OF ZONES
TRANSFORMER VOLTAGE
MAX OUTPUT AT 24 VAC
ZVC404 ZVC406
4 with Priority 6 with Priority
120 VAC Input 120 VAC Input
40 VA 80 VA
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 23⁄4" 3"
Features: External Indicator Lights Switchable Priority Simplified Wiring Works with 2, 3, or 4-Wire Zone Valves Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Sturdy Screw Connections Extended 3 Year Warranty Made in the USA Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
94
63⁄4" 71⁄2"
All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄ hp (5A) @ 120 VAC. 6
Do it Once. Do it Right. Visit our web site at: http://www.taco-hvac.com
101⁄4" 113⁄4"
Printed in USA Copyright 2000 TACO, Inc.
Instruction Sheet ZVC404-EXP & ZVC406-EXP Zone Valve Control THERMOSTAT
THERMOSTAT
WHITE
N/O COM N/C
SLAVE
24 VAC
1 2 3 4
T T ZONE 1
EXPANSION MASTER
T T ZONE 3
T T ZONE 4
T T ZONE 5
T T ZONE 6
OFF
T STAT 1 VALVE 1 T STAT 2 VALVE 2
SIX ZONE ZONE VALVE CONTOL WITH OPTIONAL PRIORITY
T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6
END SWITCH B PUMP
ZONE 1 1 2 3 4
END SWITCH A BOILER
N/O COM N/C ZONE 6 RELAY
TO CIRCULATOR OR BOILER AQUASTAT RELAY
ZONE 2 1 2 3 4
ZONE 3 1 2 3 4
ZONE 4 1 2 3 4
ZONE 5 1 2 3 4
ZONE 6 1 2 3 4
JUMPER 3&4
JUMPER 3&4
DRY CONTACTS
END SWITCH A BOILER
T T ZONE 2
ZVC 406-EXP
NORMAL FUSE 7 AMP MAX
RESET
ZONE 6 PRIORITY ON
PLUG-IN CARDS
MODE
Installation of Optional System and/or DHW Circulator END SWITCH B PUMP
INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT
24 VAC
POWER CONTROLS
TACO, INC ZVC406-EXP
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
WHITE
THERMOSTAT
24 VAC
POWER IN
120 VAC INPUT BLACK
FACTORY INSTALLED TRANSFORMER
Wiring Diagram
TO CIRCULATOR OR BOILER AQUASTAT RELAY
2 WIRE ZONE VALVE (NO END SWITCH)
SYSTEM CIRCULATOR
MOTOR
1 2 3
TACO 3 WIRE ZONE VALVE
END SWITCH
VALVE 6 POWER ON
SEE NOTE
PRIORITY ZONE
4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING)
T T BOILER DHW CIRCULATOR (See Note)
120 VAC
NEUTRAL
HOT
Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relays. The green light should always be on, indicating that power is connected. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. Mode Operation: When the mode switch is set to NORMAL, both end switch relays will be energized if any zone is in operation. When the mode switch is set to RESET, the end switch relay “A” will only be energized when the priority zone is in operation. The end switch relay “B” will be energized when any zone is in operation Power Input: Connect 120 volt ac power input to leads on transformer. Neutral to white wire. Hot to black wire. Expansion Connections: Set the expansion switch to MASTER on the zone valve control that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of Switching Relay -EXP or Zone Valve -EXP controls.
The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service.
Specifications: PRODUCT NUMBER
NUMBER OF ZONES
ZVC404-EXP 4 with Priority ZVC406-EXP 6 with Priority
TRANSFORMER VOLTAGE
MAX OUTPUT AT 24 VAC
120 VAC Input 120 VAC Input
80 VA 80 VA
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 113⁄4" 113⁄4"
71⁄2" 71⁄2"
3" 3"
All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone
of 1⁄6 hp (5A) @ 120 VAC.
Features: External Indicator Lights Plug-In PowerPort Cards Switchable Priority Simplified Wiring Add-On Power Controls Works with 2, 3, or 4-Wire Zone Valves UL Approved Fuse Protected 100% Factory Tested
Isolated End Switch Expandable to 20 Zones Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility Sturdy Screw Connections Extended 3 Year Warranty Made in the USA
Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Printed in USA Copyright 2000 TACO, Inc.
Visit our web site at: http://www.taco-hvac.com
95
Instruction Sheet Hydro Air Fan Controls To: Optional Aquastat on Return Line of Hydro Coil
THERMOSTAT
Optional Power Wire to Thermostat that Requires 24VAC
4
1 minute on fan delay, in heating mode 3 minute on fan delay, in heating mode 4 minute on fan delay, in heating mode Pump dry contact activated for 2 minutes every 24 hours (boiler contacts not activated) Pump dry contacts activated for 30 seconds every two weeks (boiler contacts not activated)
External Diagnostics: The external lights show full functionality of the Hydro Air Fan Control. The green light should always be on, indicating that power is connected. Red lights indicate fan operation for heating and cooling modes. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque.
Specifications:
Power On Call for Heat Fan, Cooling Fan, Heating
Power On Call for Heat Fan, Cooling Fan, Heating
HAFC101 HYDRO AIR FAN CONTROL
DRY CONTACTS PUMP
BOILER
BOILER
AIR HANDLER
AIR HANDLER
X X C R Y G G
XX X X C R Y G G Jumper
Hot
M
1 Speed Air Handler*
Line
Dry Contacts To: “T T” on Boiler or Switching Relay
High
Dry Contacts To: “T T” on Boiler or Switching Relay
Fan Relays
Fan Relay
Circulator
Outdoor Condenser Unit
Low
24 VAC
(or to “T T” on switching relay)
24 VAC
Neutral
Outdoor Condenser Unit
M
2 Speed Air Handler*
* Both HAFC101 and 201 capable of 1 and 2 speed applications
Terminal Description: Thermostat: C Optional: Common side of transformer W White - Heating signal to power some styles of thermostats Y Yellow - Condenser signal R Red - Hot side of transformer used to G Green - Fan signal switch all functions Water Coil Aquastat: TT Connect to aquastat at air handler to control operation of the fan when in the heating mode. Install a jumper if the aquastat is not used Freeze Protection Aquastat: TT Connect to aquastat or thermostat to sense low ambient temperature. Reduces the chance of pipes freezing by energizing the pump dry contacts. Pump Dry Contacts: XX May switch pump directly by bringing in external line voltage or connect to “T T” on a switching relay. Boiler Dry Contacts: XX Connect to the boiler or “T T” terminals on a switching relay. Air Handler: C Common side of transformer to power the Fan Control R Red - Hot side of transformer used to switch all functions Y Yellow - Condenser signal One Speed Motor: Glow Connect the fan to the relay. Keep the jumper installed between Ghigh and Glow. Two Speed Motor: Ghigh Remove jumper and connect Ghigh to the high speed fan relay and connect Glow to the low speed fan relay.
** Model number changed from SR501-F
PRODUCT NUMBER POWER INPUT MAXIMUM RELAY THERMOSTAT SINGLE PHAZE MOTOR NUMBER OF ZONES VOLTAGE COMBINED LOAD TYPE CURRENT RATING (RELAY) HAFC101** 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC HAFC201•• 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC The Hydro Air Fan Controls are relay type DPDT, have a thermostat current of .18 and a single phase motor rating per zone of 1/6
DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4" 5 1/4" 2 3/4" 4 1/4" 5 1/4" 2 3/4" HP (5A) @ 120 VAC.
Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com
96
AQUASTAT
5 AMP 1/6 HP RATED 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP
1 2 1&2 3
THERMOSTAT
AQUASTATS
HAFC201 HYDRO AIR FAN CONTROL
ON
Switch Settings (HAFC201):
WATER COIL FREEZE PR
THERMOSTAT
To: Aquastat on Return Line of Hydro Coil
Optional Power Wire to Thermostat that Requires 24VAC
C R W Y G T T
C R W Y G T T T T
Additional HAFC201 Operations: Selectable one, three or four minute delay on fan operation in heating mode. Selectable pump exercise activates circulator but does not enable boiler contacts. Two minutes every 24 hours minimizes the chance of bacteria build-up in an open loop system. Thirty seconds every two weeks minimizes seasonal start-up problems generally associated with harsh water conditions. Optional aquastat or thermostat can be connected to Freeze Protection TT terminals to reduce the chance of pipes freezing by energizing the pump dry contacts (boiler contacts not activated.)
To: Optional Aquastat or Thermostat to sense low ambient temperature
OFF
The Hydro Air Fan Control is an interface between the thermostat and air handler. It also has an isolated end switch to start the boiler and/or pump. When the thermostat calls for heat, the Fan Control energizes the end switch relay and allows the fan to operate at low speed when the water is above the optional aquastat setting. When the thermostat calls for cooling, the Fan Control energizes the condenser and operates on high speed.
Line
Operation HAFC101 and 201:
THERMOSTAT
Printed in USA Copyright 1999 TACO, Inc.
Instruction Sheet
102-094
PC600 Post Purge Timer Plug-In PowerPort Card SUPERSEDES: August 1, 1997 Plant ID No. 9300-867
EFFECTIVE: May 1, 2000
Operation: Once the priority zone is satisfied, the PC600 maintains power to the circulator, but does not fire the boiler. The circulator purges excess heat into the priority zone, minimizing standby loss during warm weather months and optimizing boiler operation when used with a boiler reset control. Power can be maintained to the circulator from a minimum of 10 seconds to a maximum of 420 seconds. The power LED light is energized when the priority zone or the post purge card is in operation. Installation: The PC600 can be installed in any one of the PowerPort terminals located on the Taco Expandable (-EXP) Control(s). Remove the shunt/jumper between pins 9 & 10 on the PowerPort terminal before installing the PC600. Align the connector on the base of the post purge card with the PowerPort terminal on the Expandable Control and push until the two mate. XX Terminals (Optional): The XX terminals on the post purge card can be wired to TT on the boiler to fire only when the priority zone is calling for heat. If using a boiler with an internal reset control, wire the XX terminals in parallel with the TT connections of the internal reset control.
Do it Once. Do it Right.
Printed in USA
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Instruction Sheet
Copyright 2000 TACO, Inc.
102-095
PC605 Priority Protection Plug-In PowerPort Card SUPERSEDES: MAY 1, 1998 PLANT ID NO. 9300-1012
EFFECTIVE: MAY 1, 2000
Operation: The PC605 Priority Protection Plug-In Card is a solid state control that helps prevent freeze-ups in the event of a priority zone failure. If the priority zone calls for heat continuously for more than one hour, power is returned to the space heating (non-priority) zones, allowing all zones to function independently. Once the priority zone is satisfied, the PC605’s auto-reset is activated and the priority zone is again allowed to have priority for up to one hour the next time it calls. The one hour time frame is not adjustable. The red LED light is energized only when the Priority Protection Card is operating in priority override mode. Installation: The PC605 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 on the Expandable Control unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on the Expandable Control and push until the two mate. The PC605 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls.
Do it Once. Do it Right.
Printed in USA
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Instruction Sheet
Copyright 2000 TACO, Inc.
102-096
PC610 Pump Exercise and Timer Plug-In PowerPort Card SUPERSEDES: May 31, 1998 Plant ID No. 9300-1025
EFFECTIVE: May 1, 2000
Operation: The PC610 Pump Exercise and Timer Plug-In Card is a solid state universal timer designed to cycle all the pumps that are attached to the Expandable Control(s) at selected time intervals. This minimizes seasonal start-up problems generally associated with harsh water conditions. The control can be configured to reduce the chance of freeze-ups by cycling the pumps more often during cold weather months. Bacteria can be minimized in heating systems that utilize domestic hot water heaters as their heat source by systematically circulating the water. Installation: The PC610 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 on the Expandable Switching Relay unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on the Expandable Switching Relay and push until the two mate. The PC610 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls. Typical Settings: Application On Time Off Time Pump Exercise Bacteria Minimization Freeze Protection
30 sec. 4 min. 4 min.
2 weeks 12 hours 1 hour
Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436.
Printed in USA Copyright 2000 TACO, Inc.
97
Standard Terms and Definitions Switching Relay: Transformer and relay in one box, which allows a low voltage thermostat to control a line voltage load (circulator), with an isolated end switch that can energize the boiler. Zone Valve Control: Transformer and relay in one box, which allows a low voltage thermostat to control a low voltage zone valve, with an isolated end switch that can energize the boiler and/or circulators.
Dry Contacts: Set of relay contacts that make and beak, where no voltage is present. Usually can switch 24 or 120 VAC. Isolated End Set Switch: Set of dry contacts that make when a zone calls for heat. Usually connected to a boiler’s aquastat TT. Mode Switch: Switch set to NORMAL – When any zone calls for heat, the end switch will make and fire the boiler. Switch set to RESET – When any zone calls for heat, a heat demand signal is given to external add-on reset control and it controls boiler operation.Also when the priority zone calls for heat and is switched to priority, the end switch will override reset control and fire boiler to high limit.
TT: Where thermostat or aquastat connects on a heating control. XX: Denotes Isolated End Switch. Low Voltage: 24 VAC for most HVAC systems. Line Voltage: Normally 120 VAC relative to ground. H or L1: Hot side of line voltage. N or L2: Neutral side of line voltage. ZR: 120 VAC (Hot) signal from switching relay to boiler’s operating aquastat to fire the burner to high limit when any zone calls for heat. Also ideal for controlling primary circulator.
ZC: 120 VAC (Hot) signal from boiler’s operating aquastat to switching relay allowing circulator(s) to run when aquastat is above the set low limit. Cold Start: A boiler that fires only when there is a call for heat. Tankless Coil: A method of heating domestic water utilizing a heat exchanger inside a boiler.The boiler also maintains heat year round to deliver hot water on demand.
DHW Heater: A method of heating domestic water utilizing a heat exchanger and storage tank. Transformer: A component for increasing or reducing AC voltage. Rated in VA (volts x amps). OHMS Law:
Example: A 24 volt, 40 VA transformer can produce how much current? Current = VA / Voltage
I = E/R R = E/I E=IxR W=ExI I = W(VA)/E
where
40 / 24 = 1.6 Amps
I = Current in Amps R = Resistance in Ohms E = Volts W = Watts or VA
RELAY CONTACTS: N/C: Normally closed connection of a relay, when not energized. N/O: Normally open connection of a relay, when not energized. Com: The common terminal for normally open and normally closed. Pole: The number of independent circuits of a switch or relay. Throw: The number of settings which a switch or relay can have. DPDT = Double Pole Double Throw 98
3 4 4 6 6 5
COM N/O N/C N/C N/O COM
Zone Zone Zone Zone Zone Zone
Switching Switching Switching Switching Switching Switching
Relay Relay Relay Relay Relay Relay
(DPDT) Replacement PC Board (DTSP) with Priority with Priority with Priority with Priority
Zone Valve Zone Valve Zone Valve Zone Valve
Control Control with Priority Control Control with Priority
Post Purge Timer Plug-In Card Priority Protection Plug-In Card Universal Timer/Pump Exercize Plug-In Card
PLUG IN POWERPORT CARDS
4 Zone Valve Control with Priority and 2 Power Ports 6 Zone Valve Control with Priority and 2 Power Ports
ZONE VALVE CONTROLS WITH POWERPORT OPTIONS
3 4 5 6
ZONE VALVE CONTROLS
3 Zone Switching Relay with Priority and 3 Power Ports 4 Zone Switching Relay with Priority and 3 Power Ports 6 Zone Switching Relay with Priority and 3 Power Ports
SWITCHING RELAYS WITH POWERPORT OPTIONS
1 1 2 3 4 6
SWITCHING RELAYS
99
(7) (7) (7) (7)
PC600 PC605 PC610
ZVC404-EXP ZVC406-EXP
ZVC403 ZVC404 ZVC405 ZVC406
SR503-EXP SR504-EXP SR506-EXP
SR501 SR501-845RP SR502 SR503 SR504 SR506
TACO
DPM-1
AZ-3 AZ-4P AZ-5 AZ-6P
ARM-861-DP (5,6), ARM-3P ARM-842-DP (5,6), ARM-4P ARM-866-DP (5,6), ARM-6P
AR-861-2 (3) AR-861-3 (3) AR-842 AR-866
AR821 (1), AR822
ARGO
VL500 (8) VL500 (8)
SR201 SR301 SR601 SR601 (4)
SR100
ERIE
HONEYWELL
R8889A1014 R8889B1012
R8888A1007 R8888B1005
RA89A (2), RA845A (1), RA832A (1)
TACO Zone Controls Cross-Reference
889-189 (2), 829-845 (1)
WHITE-ROGERS
SR024-001RP SR120-001RP
R-35 R-49
ARH-1, ARH-2, ARH-3
DPM-2
ARGO
EXP10
WA300
BB3000
BB1200
ERIE
1. Does not have both normally open and normally closed contacts. 2. Has only one set of normally open contacts (SPST). 3. Does not have optional priority. 4. Can be expanded to five and six zones with the addition of EXP10 relays. 5. Argo ARM units are expandable to 10 zones using special controls (ARM-1, ARM-4) with a phone jack. TACO switching relays can be expanded up to 20 zones using any combination of -EXP models with no special connections. 6. Includes only one data port for adding data port modules. 7. All TACO zone valve controls include an extra set of dry contacts (N/O, Common, N/C). 8. VL500 is only 5 zones, 4 normal and 1 priority.
NOTES:
24 Volt Replacement Relay 120 Volt Replacement Relay
REPLACEMENT PARTS
HAFC101 HAFC201
PC700 PC702 PC705
TACO
HONEYWELL
TACO Zone Controls Cross-Reference (Continued)
1 Zone Hydro Air Fan Control (1 or 2 Speed) 1 Zone Hydro Air Fan Control with Time Delays (1 or 2 Speed)
FAN CONTROLS
Boiler Reset Control 2-Stage Boiler Reset Control Variable Speed Pump Injection Mixing Control
ADD-ON POWER CONTROLS
100
WHITE-ROGERS
CONTROLS MADE EASY.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com
Printed in USA Copyright 2010 TACO, Inc.