Wiring Guide
32
2 ZVC403/404/405/406 Connected Together with Priority
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
PRIORITY
ZONE
2 WIRE ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
TACO
3 WIRE
ZONE VALVE
1
2
3
JUMPER
3 & 4
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
JUMPER
3 & 4
ZVC 404 – 4
FOUR ZONE
ZONE VALVE CONTROL
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
TO
CIRCULATOR
DRY
CONTACTS
N/O
COM
N/C
PUMP END
SWITCH
FUSE
5 AMP
ZONE 4 PUMP
END SWITCH
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
LED
INDICATORS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ISOLATED
XX
END SWITCH THERMOSTATS (24 VAC)
PRIORITY
24 VAC ZONE VALVES PRIORITY
XX
ZONE 4
PRIORITY
OFF
ON
NOTE 2: When a circulator
is used on the priority zone
instead of a zone valve,
jumper 3 and 4 of the
priority zone.
THERMOSTATS (24VAC)
RW
RW RW
CCC
See NOTE 1
RWC
NOTE 1: Terminals C are for
optional 24V thermostat
COMMON connections.
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
PRIORITY
ZONE
2 WIRE ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
TACO
3 WIRE
ZONE VALVE
1
2
3
JUMPER
3 & 4
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
JUMPER
3 & 4
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
TO
CIRCULATOR
DRY
CONTACTS
N/O
COM
N/C
PUMP END
SWITCH
FUSE
5 AMP
ZONE 4 PUMP
END SWITCH
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
LED
INDICATORS
TO: BOILER AQUASTAT RELAY
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ISOLATED
XX
END SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES PRIORITY
XX
ZONE 4
PRIORITY
OFF
ON
NOTE 2: When a circulator
is used on the priority zone
instead of a zone valve,
jumper 3 and 4 of the
priority zone.
THERMOSTATS (24VAC)
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
RW
RW RW
CCC
See NOTE 1
RWC
BOILER
H
N
TO: BOILER AQUASTAT RELAY
PRIORITY
ON
PRIORITY
ON
TTT
TTT
ZVC 404 – 4
FOUR ZONE
ZONE VALVE CONTROL