2 Zvc404/406 Connected Together With Priority - Taco SR501 Wiring Manual

WHITE
N
120 VAC
INPUT
H
BLACK
AQUASTAT RELAY
WHITE
120 VAC
INPUT
BLACK
TO BOILER AQUASTAT RELAY
BOILER
34

2 ZVC404/406 Connected Together with Priority

MODE
NORMAL RESET
24
VAC
POWER IN
MAIN EXTRA N/O COM N/C
END END
ZONE 4 RELAY
SWITCH SWITCH
TO BOILER
DRY
CONTACTS
2 WIRE ZONE VALVE
(NO END SWITCH)
MODE
NORMAL RESET
24
VAC
POWER IN
MAIN EXTRA N/O COM N/C
END END
ZONE 4 RELAY
SWITCH SWITCH
DRY
CONTACTS
THERMOSTAT THERMOSTAT
T T
24 VAC
T T T T
ZONE 1 ZONE 2
ZVC 404
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2
1 2 3 4 1 2 3 4
JUMPER
3 & 4
1
2
3
TACO
3 WIRE ZONE VALVE
THERMOSTAT THERMOSTAT
T T
24 VAC
T T T T
ZONE 1 ZONE 2
ZVC 404
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2
1 2 3 4 1 2 3 4
JUMPER
3 & 4
1
2
3
2 WIRE ZONE VALVE TACO
(NO END SWITCH) 3 WIRE ZONE VALVE
Note: When a circulator is used on the
priority zone instead of a zone valve,
THERMOSTAT jumper 3 and 4 of the priority zone.
T
ZONE 4 PRIORITY
OFF
ON
T T T T
ZONE 3 ZONE 4
ZONE 3 ZONE 4
1 2 3 4
1 2 3 4
JUMPER
3 & 4
PRIORITY
ZONE
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
AQUASTAT ON
DHW HEATER
A
THERMOSTAT
T
ZONE 4 PRIORITY
OFF
ON
T T T T
ZONE 3 ZONE 4
ZONE 3 ZONE 4
1 2 3 4
1 2 3 4
JUMPER
3 & 4
PRIORITY
ZONE
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
PRIORITY
ON
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
SEE NOTE
PRIORITY
ON
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
SEE NOTE