Wiring Guide
Table Of Contents
- Thermostat Input (24 vac):
- Power Input (120 vac):
- Circulator Output; Secondary / AUX 1 (120 vac):
- Circulator Output; Primary / AUX 2 (120 vac):
- H Connect the Hot output to Hot power input on circulator.
- Circulator Output; Priority Zone / AUX 3 (120 vac):
- Zone naming
- Programmable output naming
- Alerts & messages
- Post purge time delay adjustment
- Pump exercise time delay adjustment
- Priority protection time delay adjustment
- Indoor boiler reset
- Outdoor boiler reset
- AUX 1 output behavior
- AUX 2 output behavior
- AUX 3 output behavior
- Cooling function
- Zone association
- For your convenience, the Taco Tech Support team is available anytime 24/7. Just call 401-942-8000 for help.
4.
Wiring Procedure:
End Switches (Low Voltage Dry Contacts):
Main
The main end switch closes when any zone thermostat calls for heat
and connects to T-T on boiler operating control.
Priority
The priority end switch closes only when the priority zone thermostat
or aquastat is calling for heat and connects to DHW T-T on boiler (optional).
Thermostat Input (24 vac):
R
Hot side of transformer. Connect to
R
on thermostat.
W
Switched
R
signal from thermostat. Connect to
W
on thermostat.
C
Common side of transformer. Connect to
COM
on
thermostat (optional).
Zone Valve Connections
(24 vac)
:
1 Connect terminal 1 on ZVC to one of the motor connections on zone valve.
2 Connect terminal 2 on ZVC to the other motor connections on zone valve.
3 Connect terminal 3 on ZVC to one of the end switch connections on zone valve.
4 Connect terminal 4 on ZVC to the other end switch connections on zone valve.
Expansion Connections: (optional)
1 Connect 1 on Master zone control to 1 on all Expansion zone control(s).
2 Connect 2 on Master zone control to 2 on all Expansion zone control(s).
3
Connect 3 on Master zone control to 3 on all Expansion zone control(s).
Power Input (120 vac):
H
Connect to 120 vac Hot side of power supply to zone control.
N
Connect to 120 vac Neutral side of power supply to zone control.
G
Connect ground wire to ground screws on base of zone control.
Circulator Output; Secondary / AUX 1 (120 vac):
H
Connect the Hot output to Hot power input on circulator.
N
Connect the Neutral output to Neutral power input on circulator.
G
Connect ground wire to ground screws on base of zone control.
Circulator Output; Primary / AUX 2 (120 vac):
H
Connect the Hot output to Hot power input on circulator.
N
Connect the Neutral output to Neutral power input on circulator.
G
Connect ground wire to ground screws on base of zone control.
Circulator Output; Priority Zone / AUX 3 (120 vac):
H
Connect the Hot output to Hot power input on circulator.
N
Connect the Neutral output to Neutral power input on circulator.
G
Connect ground wire to ground screws on base of zone control
T STAT 1
T STAT 2
(PR IOR IT Y)
T STAT 3
R W C R W C R W C
P OW E R IN
120 V AC
N H
PRIORIT Y
BO I L E R
END
S WI TC H
M AIN
BO I LER
END
S WI TC H
EXPANSION
P 1 2 3
1 2 3 4 1
2 3 4
1 2 3 4
ZONE
VALVE 3
ZONE
VALVE 2
ZONE
VALVE 1
(PR IOR IT Y)
AU X
1
N H
AU X
2
N H N H
AU X
3