Taco Zone Controls Wiring Guide

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


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


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



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


N P ZC H

X2 X1 ZR ZONE1 ZONE2

ZONE3

JUMPER


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


N P ZC H



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



N P ZC H


ZONE3

JUMPERS


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



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


FUSE 1 AMP

120 VAC INPUT

JUMPER


T

BOILER

SR 504

T


PRIORITY ON


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

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


ZONE 6 PRIORITY ON


120V RELAY

24 VAC POWER

X

X

END SWITCH

OFF


ZC ZR



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


INPUT

ZONE4 POWER


ZONE3



T

ZONE1 ZONE2

TO: "TT" ON BOILER

REMOVE JUMPER

ZC ZR END SWITCH

X

120V RELAY

SR 504

T


POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4

PRIORITY OFF

THERMOSTAT 2 1

BOILER 4 3

FUSE 1 AMP

SLAVE


OFF ON

X

X

T

T

T

ZONE3

ZONE 4 PRIORITY ON OFF

INPUT

ZONE4 POWER 120 VOLT CIRCULATORS

ZONE1 ZONE2



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


PRIORITY OFF

N

H

BOILER

FUSE 1 AMP

SLAVE

24 VAC POWER

X

REMOVE JUMPER

ZC ZR

T


INPUT

ZONE4 POWER


ZONE3



T

ZONE1 ZONE2

TO: "TT" ON BOILER

END SWITCH

X

120V RELAY

SR 504

T

24 VAC POWER


JUMPER

A

ZONE2

T

ZONE3

T

ZONE3

FUSE 1 AMP

SLAVE


TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

ZONE1

N P ZC H

FUSE 1 AMP

SR 503

PRIORITY OFF

MASTER


X

X

END SWITCH

120V RELAY

REMOVE JUMPER

ZC ZR

SR 504


PRIORITY ON

T

T

T

ZONE3


120 VAC INPUT

INPUT


ZONE1 ZONE2



T

SR502/503 Switching Relay Controlling 2 SR504/506 Switching Relays

24 VAC POWER

10 N

H


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


INPUT


PRIORITY OFF

DHW CIRCULATOR

ZONE4 POWER


ZONE1 ZONE2



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


PRIORITY OFF ZONE 4 PRIORITY ON OFF


ZONE1 ZONE2



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


ZONE 6 PRIORITY ON


120V RELAY

24 VAC

X

POWER

X

END SWITCH

PRIORITY OFF

OFF


ZC ZR



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


120 VAC INPUT BLACK

WHITE

120 VAC INPUT BLACK

WHITE


T STAT

POWER

TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE

BOILER TURNS ON WHEN ANY ZONE VALVE OPENS.

JUMPER


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


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


1 2 3 4


SR504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL


24 VAC

120V RELAY

SR 504-EXP

POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER


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


A

MASTER

1 2 3 4


EXPANSION

RESET

24 VAC

NORMAL

X

X

END SWITCH

ZC ZR


SR 506-EXP SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY


120V RELAY

POWER




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


INPUT

ZONE4 POWER


ZONE1 ZONE2



T

MASTER


PRIORITY ON

JUMPERS

A

ZONE2

A

ZONE3

POWER

24 V AC

ZONE3

FUSE 1 AMP

SLAVE



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 NOT USED

120 VAC INPUT

INPUT


ZONE1 ZONE2



T

2 Indirect Water Heaters with Priority Connected to Standard Switching Relays

N

H


PRIORITY ON

16

SWITCH SETTINGS

BOILER

24 VAC POWER


SLAVE

1 2 3 4

X

TO: "TT" ON BOILER

JUMPER

ZC ZR END SWITCH

X

120V RELAY

SR 504-EXP


MASTER

ZONE NOT USED

INPUT

ZONE4 POWER


ZONE3


SR504-EXP


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


JUMPERS

ZONE2

A

ZONE3

AQUASTATS ON DHW HEATERS

24 VAC POWER


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


ZONE3



SLAVE

N

H


Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off


T

ZONE1 ZONE2

PLUG-IN CARDS

POWER ZONE 1 ZONE 2

PRIORITY OFF

1 2 3 4

DHW CIRCULATORS

ZONE3

MASTER



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


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


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


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


K2-A

H


X

X

END SWITCH

ZC ZR

ZONE1 ZONE2 ZONE3 ZONE4


POWER INPUT

FUSE 1 AMP

JUMPER

MASTER

JUMPER PRIMARY SYSTEM CIRCULATOR (Optional)

BOILER


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


TO: "TT" ON BOILER

T PC700 BOIL OUT SEN SEN

MASTER


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


MASTER

SR 501-EXP

SLAVE

K1

NORMAL

K2-A

K2-A

H

24 VAC POWER

120V RELAY

H ZC ZR H

POWER INPUT


POWER T STAT

K2

K1-B

N



FUSE 5 AMP


X

X

END SWITCH

ZC ZR



POWER INPUT

FUSE 1 AMP

JUMPER

BOILER

THERMOSTATS


REMOVE JUMPER 120 VAC INPUT

H N

18

SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Zone Valve Control OUTDOOR SENSOR


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


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


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


ZONE 2 1 2 3 4

ZONE 4 1 2 3 4

ZONE 3 1 2 3 4

K2-A

H


JUMPER 3&4

JUMPER 3&4

SEE NOTE

PRIORITY ZONE 1 2 3


JUMPER


END SWITCH


ZONE VALVE SYSTEM CIRCULATOR

PRIMARY SYSTEM CIRCULATOR (Optional)

BOILER

MOTOR



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


TO: "TT" ON BOILER


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


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


FUSE 1 AMP


THERMOSTATS

POWER T STAT

K2



K1-B

N

K2-A

H ZC ZR H

POWER INPUT


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


K2-A

H


JUMPER 3&4

JUMPER 3&4

SEE NOTE

PRIORITY ZONE 1 2 3


JUMPER


BOILER


MOTOR

END SWITCH




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


POWER CONTROLS END SWITCH

PC700

EXPANSION

X X 1 2 3 4

RESET OVERRIDE

T/R T/W COM

1 2

MODE RESET



K1-A

MASTER

FUSE 1 AMP

ZONE CONTROL

SR 501-EXP

SLAVE

BOILER SENSOR

K1

NORMAL


120V RELAY

K1-B

N

K2-A

H ZC ZR H

POWER INPUT


POWER T STAT

K2

FUSE 5 AMP

24 VAC POWER

BOIL OUT SEN SEN

THERMOSTAT

K2-A

H


X

X

END SWITCH

ZC ZR



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


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


FUSE 1 AMP

MASTER

RESET THERMOSTAT OVERRIDE


THERMOSTATS WHITE 120 VAC INPUT

POWER T STAT

K2



K1-B

N

K2-A

H ZC ZR H


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


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


MOTOR

END SWITCH



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


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


120 VAC INPUT



ZONE1 ZONE2


SR 504-EXP


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


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


120 VAC INPUT



ZONE1 ZONE2


SR 504-EXP


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


120 VAC INPUT



ZONE1 ZONE2


SR 504-EXP


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


1 2 3 4

MASTER

ZONE CONTROL

BOIL OUT SEN SEN

THERMOSTATS

EXPANSION



SR 504-EXP

BOILER SENSOR


RESET NORMAL


24 VAC

120V RELAY

POWER

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER


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



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


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


PLUG-IN CARDS


1 2 3 4

MASTER

EXPANSION



SR 504-EXP

BOILER SENSOR


RESET NORMAL


24 VAC

120V RELAY

POWER

X

BOILER #1

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER


INPUT

FUSE 1 AMP

120 VAC INPUT

JUMPER

BOILER #2


SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority

THERMOSTATS

T

SLAVE



SLAVE

1 2 3 4 EXPANSION





24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER


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


SYSTEM CIRCULATOR

BLUE

SR 504-EXP

PC705-2


RESET NORMAL BOIL SUP OUT SEN SEN SEN

ZONE CONTROL

BLACK




SUPPLY SENSOR

24 VAC POWER

BOILER SENSOR

120V RELAY

X

X

END SWITCH

ZC ZR

ZONE1 ZONE2

ZONE3

ZONE4 POWER INPUT


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



1 2 3 4 EXPANSION





24 VAC POWER

120V RELAY

X

X

END SWITCH

ZC ZR

ZONE1 ZONE2

ZONE3

ZONE4 POWER


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


T

SLAVE

PC700

MASTER


MASTER

ZONE CONTROL

BOIL OUT SEN SEN

THERMOSTATS

EXPANSION




SR 504-EXP

BOILER SENSOR


RESET NORMAL


24 VAC POWER

120V RELAY

X

X

END SWITCH

ZONE1 ZONE2

ZC ZR

ZONE3

ZONE4 POWER


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


1 2 3 4 EXPANSION



SR 504-EXP


RESET NORMAL


SUPPLY SENSOR BOILER SENSOR

24 VAC POWER

120V RELAY

X

X

END SWITCH

ZC ZR

ZONE1 ZONE2

ZONE3

ZONE4 POWER


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


MASTER

EXPANSION





SR 504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY

RESET NORMAL BOILER SENSOR


24 VAC POWER

120V RELAY

X

X

ZONE1 ZONE2

ZC ZR END SWITCH

ZONE3

ZONE4 POWER


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


SLAVE SLAVE

PLUG-IN CARDS

RED

BLUE

SYSTEM CIRCULATOR

MASTER

1 2 3 4 EXPANSION



ZONE CONTROL

BLACK


SR 504-EXP


RESET NORMAL



24 VAC POWER

120V RELAY

X

X

ZC ZR END SWITCH

ZONE1 ZONE2

ZONE3

ZONE4 POWER


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


END SWITCH

SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

SYSTEM PUMP


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


1 2 3

ZONE 3 1 2 3 4


ZONE 2 1 2 3 4

MOTOR

END SWITCH

ZONE 5 1 2 3 4


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 1 T STAT 2

T STAT 1

BOILER

H

N

WHITE 24 VAC

24 VAC


SYSTEM PUMP


120 VAC INPUT BLACK

WHITE

120 VAC INPUT BLACK



DRY CONTACTS

JUMPER 3&4

ZONE 1 1 2 3 4

T T ZONE 1



MODE

NORMAL RESET

ZVC 406

T T ZONE 4

T T ZONE 5

T

THERMOSTAT

1 2 3

ZONE 3 1 2 3 4


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



T STAT 2

VALVE 1

T STAT 1


ON

SEE NOTE


ZONE 6 PRIORITY

T T ZONE 6

A


ZONE 4 1 2 3 4


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


DHW PUMP


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


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

SEE NOTE



VALVE 1 T STAT 2

T STAT 1


ON

OFF

ZONE 6 PRIORITY

T T ZONE 6

A


ZONE 4 1 2 3 4


T T ZONE 2



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.


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


DHW PUMP


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


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

SEE NOTE



VALVE 1 T STAT 2

T STAT 1


ON

OFF

ZONE 6 PRIORITY

T T ZONE 6

A


ZONE 4 1 2 3 4


T T ZONE 2



MODE

NORMAL RESET

T

T 24 VAC

THERMOSTAT

THERMOSTAT


SYSTEM PUMP


120 VAC INPUT BLACK

WHITE

120 VAC INPUT BLACK


ZVC404/406 with System and DHW Pumps

POWER IN

32 FUSE (7 AMP MAX)

BOILER

H

N

WHITE 24 VAC

24 VAC


DHW PUMP


SECONDARY PUMP COMES ON WHEN ANY ZONE CALLS EXCEPT PRIORITY ZONE.


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


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

SEE NOTE



VALVE 1 T STAT 2

T STAT 1


ON

OFF

ZONE 6 PRIORITY

T T ZONE 6

A


ZONE 4 1 2 3 4


T T ZONE 2


JUMPER 3&4

ZONE 1 1 2 3 4

T T ZONE 1

SECONDARY PUMP


MODE

NORMAL RESET

T

T 24 VAC

THERMOSTAT

THERMOSTAT


SYSTEM PUMP


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


N H


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)


T T ZONE 3

T T ZONE 4

T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 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

TO BOILER AQUASTAT RELAY JUMPER 3&4

JUMPER 3&4

SEE NOTE

PRIORITY ZONE 1 2 3

DRY CONTACTS

MOTOR



END SWITCH


THERMOSTAT

THERMOSTAT

THERMOSTAT

T

T

T


A



24 VAC ZONE 4 PRIORITY

MODE

NORMAL RESET

24 VAC

OFF ON

T T ZONE 1

POWER IN

FUSE (3 AMP MAX)



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



MOTOR

END SWITCH


T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3

ZVC 404


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


SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On

T

T 24 VAC

SLAVE POWER CONTROLS

24 VAC

TACO, INC ZVC406-EXP


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


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN

WHITE


MASTER 120 VAC INPUT BLACK


A

T

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

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



SYSTEM PUMP

END SWITCH


N H

120 VAC INPUT



T

T

T


24 VAC



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


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN



SLAVE


END SWITCH B PUMP


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



MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE


35

2 EXP Zone Valve Controls Connected Together with DHW Pump



T

T 24 VAC


24 VAC



120 VAC INPUT BLACK

RESET

1 2 3 4

T T ZONE 1


T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN

WHITE




A

T


END SWITCH B PUMP


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 MOTOR

1 2 3

BOILER



DHW PUMP

END SWITCH


N H

120 VAC INPUT

BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.


T

T

T


24 VAC



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



END SWITCH B PUMP


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


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



SLAVE


MOTOR

END SWITCH

PRIORITY ZONE


VALVE 6 POWER ON

SEE NOTE

2 EXP Zone Valve Controls Connected Together with System and DHW Pumps



T

T 24 VAC

SLAVE

1 2 3 4

POWER CONTROLS

24 VAC



120 VAC INPUT BLACK

RESET

T T ZONE 1


T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN

WHITE




A

T


END SWITCH B PUMP


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

BOILER

MOTOR

1 2 3

SYSTEM PUMP

DHW PUMP



END SWITCH


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.


T

T

T


24 VAC



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


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN



SLAVE


END SWITCH B PUMP


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



MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE


37

2 EXP Zone Valve Controls Connected Together with System, DHW and Secondary Pumps



T

T 24 VAC




120 VAC INPUT BLACK

24 VAC

RESET

1 2 3 4

T T ZONE 1


T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN

WHITE




A

T


END SWITCH B PUMP


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

BOILER

DHW PUMP

MOTOR

1 2 3

SYSTEM PUMP

SECONDARY PUMP



END SWITCH


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.


T

T

T


24 VAC



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




END SWITCH B PUMP


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


38

T T ZONE 4


24 VAC

MODE

WHITE

ZONE 6 PRIORITY ON

PLUG-IN CARDS

POWER IN



SLAVE


MOTOR

END SWITCH

PRIORITY ZONE


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


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


ZONE 4 1 2 3 4


T T ZONE 2

ZONE 2 1 2 3 4

T T ZONE 1


EXPANSION MASTER


MODE


PLUG-IN CARDS

T

T 24 VAC

THERMOSTAT

THERMOSTAT

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

24 VAC


120 VAC INPUT BLACK

WHITE

120 VAC INPUT BLACK 24 VAC

BOILER SENSOR

WHITE

BOIL OUT SEN SEN



POWER IN

PC700


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


BLACK

120 VAC INPUT

WHITE

BLACK

120 VAC INPUT

WHITE 24 VAC



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


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


ZONE 4 1 2 3 4


T T ZONE 2

ZONE 2 1 2 3 4

T T ZONE 1


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




PC702


24 VAC

DHW DEMAND


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


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


24 VAC END SWITCH B PUMP


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


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


ZONE 4 1 2 3 4


T T ZONE 2

ZONE 2 1 2 3 4

T T ZONE 1


EXPANSION MASTER

SYSTEM CIRCULATOR (OPTIONAL LOCATION)

RESET

MODE


T

T 24 VAC

THERMOSTAT


THERMOSTAT

PLUG-IN CARDS


SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.

24 VAC



SYSTEM CIRCULATOR


GREEN/GROUND


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


PC700 Boiler Reset Control Connected To 2 EXP Zone Valve Controls

OUTDOOR SENSOR




PC700 ZONE CONTROL

T

BOILER SENSOR

T

24 VAC



120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS

24 VAC


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


FUSE 7 AMP MAX



MASTER POWER IN

BOIL OUT SEN SEN


END SWITCH B PUMP

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

MOTOR

1 2 3

BOILER

DHW CIRCULATOR

POWER ON

JUMPER 3&4

JUMPER 3&4

SYSTEM CIRCULATOR

VALVE 6



SEE NOTE

PRIORITY ZONE

END SWITCH


H N



T

120 VAC INPUT BLACK


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


ZVC 406-EXP

VALVE 2



END SWITCH B PUMP


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

42

T ZONE 6 PRIORITY ON

FUSE 7 AMP MAX

WHITE


BLACK

POWER IN

120 VAC INPUT

T 24 VAC

PLUG-IN CARDS

24 VAC


WHITE


SLAVE


MOTOR

END SWITCH

PRIORITY ZONE


VALVE 6 POWER ON

SEE NOTE

PC702 2–Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls

OUTDOOR SENSOR



DHW DEMAND

PC702




T

BOILER SENSOR

T


24 VAC



120 VAC INPUT BLACK

RESET

1 2 3 4

ZONE 6 PRIORITY ON

T T ZONE 1


T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T

24 VAC PLUG-IN CARDS

POWER IN



MASTER


END SWITCH B PUMP


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



END SWITCH


H N

SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. BOILER #2


T

T


24 VAC



120 VAC INPUT BLACK

RESET

1 2 3 4

ZONE 6 PRIORITY ON

T T ZONE 1


T T ZONE 2

T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T


POWER IN



SLAVE


END SWITCH B PUMP


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



MOTOR

END SWITCH


43

PC705 Variable Speed Pump Injection Control Connected To 2 EXP Zone Valve Controls

OUTDOOR SENSOR



RED

SYSTEM CIRCULATOR


BLUE

PC705-2


BLACK BOIL SUP OUT SEN SEN SEN


ZONE CONTROL

T

SUPPLY SENSOR

T

24 VAC


BLACK

24 VAC


WHITE


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


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS POWER IN


WHITE 120 VAC INPUT

T

24 VAC

MASTER

BOILER SENSOR


END SWITCH B PUMP


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



SYSTEM CIRCULATOR (OPTIONAL LOCATION)

VALVE 6 POWER ON

JUMPER 3&4

JUMPER 3&4

DRY CONTACTS


ZONE 2 1 2 3 4

END SWITCH

SEE NOTE

PRIORITY ZONE


H N


T

T

24 VAC



BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS

24 VAC


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


ZVC 406-EXP

VALVE 2



END SWITCH B PUMP


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

44

T

24 VAC

FUSE 7 AMP MAX

120 VAC INPUT BLACK

POWER IN

WHITE


SLAVE


MOTOR

END SWITCH

PRIORITY ZONE


VALVE 6 POWER ON

SEE NOTE

PC700 and PC705 Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR




PC700 ZONE CONTROL

T

BOILER SENSOR

T

24 VAC



120 VAC INPUT BLACK

ZONE 6 PRIORITY ON

PLUG-IN CARDS

24 VAC


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


FUSE 7 AMP MAX



MASTER POWER IN

BOIL OUT SEN SEN


END SWITCH B PUMP

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 MOTOR

1 2 3

BOILER


2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM CIRCULATOR

VALVE 6

SEE NOTE

PRIORITY ZONE

END SWITCH


DHW CIRCULATOR

H N OUTDOOR SENSOR


GREEN/GROUND

(SEE NOTE B ON PAGE 23) SYSTEM CIRCULATOR

RED

BLUE



ZONE CONTROL

BLACK


T

T

120 VAC INPUT BLACK


ZONE 6 PRIORITY ON

24 VAC


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


ZVC 406-EXP

VALVE 2


FUSE 7 AMP MAX

WHITE


BLACK

POWER IN

120 VAC INPUT

T



WHITE


SLAVE


END SWITCH B PUMP


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


ZONE 6 1 2 3 4


MOTOR

END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE


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





T

BOILER SENSOR

T


24 VAC


RESET


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


FUSE 7 AMP MAX

24 VAC

MODE

WHITE

T


POWER IN



MASTER


END SWITCH B PUMP

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

MOTOR

1 2 3

SYSTEM CIRCULATOR

DHW CIRCULATOR

POWER ON

JUMPER 3&4

JUMPER 3&4

BOILER #2

VALVE 6



END SWITCH

SEE NOTE

PRIORITY ZONE


H N OUTDOOR SENSOR


GREEN/GROUND


RED

SYSTEM CIRCULATOR

BLUE

PC705-2


BLACK BOIL SUP OUT SEN SEN SEN

ZONE CONTROL


T

T



24 VAC



120 VAC INPUT BLACK

RESET

1 2 3 4

ZONE 6 PRIORITY ON

T T ZONE 1


T T ZONE 3

T T ZONE 4

T T ZONE 5

T T ZONE 6

OFF




END SWITCH B PUMP


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


46

T T ZONE 2


24 VAC

MODE

WHITE

T


POWER IN



SLAVE


MOTOR

END SWITCH


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


THERMOSTAT

T To: Aquastat on Return Line of Hydro Coil


C R W Y G T T THERMOSTAT

AQUASTAT



BOILER

AIR HANDLER

X X C R Y G G

Line

Fan Relays

High

Low


24 VAC

LOW HIGH


M


48


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


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


Line

Circulator


M


49


To: Optional Aquastat on Return Line of Hydro Coil

THERMOSTAT

T Optional Power Wire to Thermostat that Requires 24VAC


C R W Y G T T T T THERMOSTAT

WATER COIL FREEZE PR AQUASTATS


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


Fan Relays

Neutral


M


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


THERMOSTAT

High

X

END SWITCH

X

120V RELAY

JUMPER

ZC ZR

SR 504

AQUASTAT

BOILER HIGH

M

INPUT


ZONE3


N

H


120 VAC INPUT


2 SPEED AIR HANDLER


ZONE1 ZONE2

LOW

AIR HANDLER

X X C R Y G G


TO: AQUASTAT ON RETURN LINE OF HYDRO COIL


THERMOSTAT

C R W Y G T T

T

Low

C R W Y G T T


High


Fan Relays

T

Fan Relays

THERMOSTAT


AQUASTAT

BOILER

LOW

AIR HANDLER HIGH

X X C R Y G G

DHW HEATER AQUASTAT

2 SPEED AIR HANDLER

M





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


SR 504



24 VAC POWER 120V RELAY

X

X

ZONE1 ZONE2

ZC ZR END SWITCH

ZONE3

ZONE4 POWER INPUT


FUSE 1 AMP

H 120 VAC INPUT

JUMPER

N

TO: "TT" ON BOILER

BOILER

120 VAC INPUT BLACK


WHITE

THERMOSTAT

THERMOSTAT

T

T

T

R

RED

W

WH

24 VAC

POWER IN

120 VAC INPUT BLACK

THERMOSTAT

C

COMMON

WHITE


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



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


ZONE 2 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4


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


MOTOR

BLACK BLACK



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



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


ZONE 2 1 2 3 4

ZONE 4 1 2 3 4

ZONE 5 1 2 3 4


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


MOTOR

BLACK BLACK



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


N P ZC H



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


120 VAC INPUT BLACK

WHITE

120 VAC INPUT BLACK


BOILER

H

N



DRY CONTACTS


MODE

NORMAL RESET

END SWITCH


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


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


OFF



VALVE 1 T STAT 2

T STAT 1

PRIORITY ON

PRIORITY ON


ON

SEE NOTE


ZONE 6 PRIORITY

T T ZONE 6

A

PRIORITY ZONING CIRCULATOR


1 2 3

ZONE 3 1 2 3 4


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


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


SLAVE



EXPANSION

RMB

X END SWITCH

ZC ZR

ZONE1 ZONE2 ZONE3 120 VOLT CIRCULATORS

ZONE3

OFF


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


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


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


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


X - Pump Block Connected to Zone Valve Control Power H N Input Outdoor Sensor

T

Power Cord


Boiler

XPB

T


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


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


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


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


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


BACK OF iVALVE-R MIXING VALVE ACTUATOR 24 Volt

Transformer


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



T

Motor

Outdoor Sensor

Supply Sensor

iSeries-R

Boiler Sensor


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


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


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


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


McDONNELL & MILLER RB-120

TACO LTA1203S-2 N

H

COM NC

HOT

1

NEUTRAL

24 VAC TRANSFORMER

H

B


72

H

24 VAC TRANSFORMER


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


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


NEUTRAL

NEUTRAL

TACO LTR0243T-1

HYDROLEVEL 1100



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


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


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


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


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


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



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


BLACK

N H


BURNER

N

H

COM

NC NO




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


BLACK

RED

N H


BURNER

N

H

COM

NC NO




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


BLACK

RED

N H


BURNER

N

H

COM

NC NO




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


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


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)


L2 (NEUTRAL)

L1 (HOT)

HONEYWELL L8124G & L OR EQUAL


L1

T

L2

TACO ZONE CONTROL

T END SWITCH

B2

C1

ZC

C2

ZR

B1


L1 (HOT)

HONEYWELL L8124M OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE


L1

T

L2

TACO ZONE CONTROL

T END SWITCH

3

C1

C2

B1


B2


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)


L2 (NEUTRAL)

HONEYWELL L8148E OR EQUAL

TACO ZONE CONTROL

T END SWITCH

MILLIVOLTAGE GAS VALVE

B1

B2


C2

L1

L2

B3


OR

C1

L1 (HOT)

L1 (HOT)

120 VAC INPUT

L2 (NEUTRAL)

HONEYWELL L8148J OR EQUAL


L1

B1

L2

B2 C2

TACO ZONE CONTROL

OIL BURNER AND IGNITION END SWITCH

C1 ZC


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



T

TV

HONEYWELL L8124A & C OR EQUAL


END SWITCH X X

Z

T

L1

ZC

ZR

B1

L2

B2 C2

C1

120 VAC INPUT


L2 (NEUTRAL)

L1 (HOT)

TACO SWITCHING RELAY ZC

ZR

N

H


HONEYWELL L8124G & L OR EQUAL

L1 (HOT)

120 VAC INPUT

L1

L2 (NEUTRAL) T

L2


T

T

END SWITCH X X

ZC

ZR

N

H


C1

B2

C2

ZC ZR


B1


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


T

T

END SWITCH X X

ZC

ZR

N

H


R C2

C1

B2

B1



L1 (HOT)

L2 (NEUTRAL)

120 VAC INPUT

L1

HONEYWELL L8148A OR EQUAL

B1

L2

B2 C2 C1 ZC

OIL BURNER AND IGNITION


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


HONEYWELL L8124E

B1

C1

C2

L1

L2

MALE CONNECTOR

B2 G

L1 (HOT)

FEMALE CONNECTOR


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


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


R

B1

C1

C2

L1

L2

B2

SPILL SWITCH

L1 (HOT)

G



Aquastat Wiring to 120VAC Low Water Cutoff TO THERMOSTAT

TACO LNA120 OR LTA120-2

N

TV

HONEYWELL L8148E

T

W Z


B R

B1

C1

C2

L1

L2

B2

G

SPILL SWITCH


86

L1 (HOT)


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



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


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


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


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"


Do it Once. Do it Right.® Visit our web site at: http://www.taco-hvac.com

5 1/4"


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


N P ZC H

ZONE3

FUSE 1 AMP



ZONE2


N P ZC H

ZONE3



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


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


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





89

Instruction Sheet SR504 & SR506 Switching Relay THERMOSTATS

THERMOSTATS


Cold Start Boiler Application

SR 506


ZONE 6 PRIORITY ON

X

X

END SWITCH

ZC ZR



24 VAC POWER

POWER INPUT

OFF

120V RELAY

ZONE 5 ZONE 6 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6

ZONE 6 PRIORITY ON



120V RELAY

24 VAC POWER

SR 506

OFF



X

X

END SWITCH

ZONE 5 ZONE 6

ZC ZR



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.


NUMBER OF ZONES

TRANSFORMER VOLTAGE



SR504 SR506



20 amps 20 amps

10 1/4" 11 3/4"

6 3/4" 7 1/2"

2 3/4" 3"


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


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


Instruction Sheet SR501-EXP Switching Relay Cold Start 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


POWER INPUT

SR 501-EXP

K2-A

H ZC ZR H

K2-A

H


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"


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.




91

Instruction Sheet SR503-EXP, SR504-EXP & SR506-EXP Switching Relay Cold Start Boiler Application


THERMOSTATS

EXPANSION CONNECTIONS 1234

SLAVE


EXPANSION CONNECTIONS PLUG-IN CARDS

MASTER


RESET

24 VAC POWER

NORMAL


120V RELAY

X

THERMOSTATS

X

END SWITCH



SR 506-EXP ZC ZR



1234

SLAVE


PLUG-IN CARDS

MASTER


RESET

24 VAC POWER


120V RELAY

X

POWER INPUT


SR 506-EXP

X

ZC ZR

END SWITCH

FUSE 1 AMP

NORMAL




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


NUMBER OF ZONES

POWER PORTS

TRANSFORMER VOLTAGE



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"



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


Instruction Sheet ZVC403 & ZVC405 Zone Valve Control THERMOSTAT

THERMOSTAT

WHITE

24 VAC

T T ZONE 1 FUSE (5 AMP MAX)

120 VAC INPUT BLACK


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


ZONE 5 1 2 3 4

JUMPER 3&4

1 2 3

DRY CONTACTS

N/O COM N/C


T T

T T ZONE 4


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


Wiring Diagram

MOTOR


END SWITCH


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.


NUMBER OF ZONES

TRANSFORMER VOLTAGE

MAX OUTPUT AT 24 VAC

ZVC403 ZVC405

3 Zone 5 Zone


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.



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



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


ZVC 406

ZONE 5 1 2 3 4


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


WHITE

ZONE 6 PRIORITY

MODE

NORMAL RESET

POWER IN


WHITE

T T

THERMOSTAT INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT

120 VAC INPUT BLACK


THERMOSTAT

THERMOSTAT

1 2 3 2 WIRE ZONE VALVE (NO END SWITCH)


MOTOR

END SWITCH


(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.


NUMBER OF ZONES

TRANSFORMER VOLTAGE


ZVC404 ZVC406



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.


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"


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


SIX ZONE ZONE VALVE CONTOL WITH OPTIONAL PRIORITY


END SWITCH B PUMP

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

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


24 VAC

POWER CONTROLS


120 VAC INPUT BLACK


WHITE

THERMOSTAT

24 VAC

POWER IN

120 VAC INPUT BLACK


Wiring Diagram



SYSTEM CIRCULATOR

MOTOR

1 2 3


END SWITCH

VALVE 6 POWER ON

SEE NOTE

PRIORITY ZONE


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.


NUMBER OF ZONES

ZVC404-EXP 4 with Priority ZVC406-EXP 6 with Priority

TRANSFORMER VOLTAGE



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.




95

Instruction Sheet Hydro Air Fan Controls To: Optional Aquastat on Return Line of Hydro Coil

THERMOSTAT


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:




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


High


Fan Relays

Fan Relay

Circulator


Low

24 VAC


24 VAC

Neutral


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


ON

Switch Settings (HAFC201):

WATER COIL FREEZE PR

THERMOSTAT

To: Aquastat on Return Line of Hydro Coil


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.)


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


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


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


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



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
