Wiring Guide

56
ZVC404-EXP Zone Valve Control Controlling a Standard (Non-Expandable) Switching Relay
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
POWER
CONTROLS
SEE NOTE 2
ZVC 404-EXP-4
FOUR ZONE EXPANDABLE
ZONE VALVE CONTROL
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
N/O COM N/C
PUMP END
SWITCH
ZONE 4 PUMP
END SWITCH
SLAVE
PRIORITY ON
RESET
POST PURGE ON
PRIORITY PROTECTION ON
PUMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
NORMAL
OFF
OFF
OFF
4 MIN/24 HOUR
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 (24 VAC)
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
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 NET
EXPANSION
MAIN
PRIORITY
XX
XX
AB
CRW
C
RW
C
RW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES
ACCESSORY
PORT
PRIORITY
XX
FUSE
5 AMP
FUSE
5 AMP
Powered from
Transformer A
Powered from
Transformer B
A
B
ZONE
VALVE
PUMP
Powered from
Transformer A
Powered from
Transformer B
120 VOLT CIRCULATORS
ZC ZR
X X
ISOLATED
END SWITCH
120 VOLT
INPUT
120 VAC
INPUT
TO: "TT" ON BOILER
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
PRIORITY
REMOVE
JUMPER
H N H N H N H N H N H N
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
PRIORITY
SPARE
FUSE
120V RELAY
SPARE
FUSE
SIX ZONE
SWITCHING RELAY WITH PRIORITY
ZONE 6
PRIORITY
ON
OFF
N H
SR 506
24 VAC
POWER
120 VAC INPUT
THERMOSTATS
(24 VAC)
BOILER
SLAVE
HN
(EXISTING CONTROL)
PRIORITY
OFF
MASTER
TO: “TT” ON BOILER
TO: “TT” ON BOILER WITH
DHW “TT” INPUT
NOTE 1: Terminals C are for
optional 24V thermostat
COMMON connections.