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TSTAT1
VALVE1
TSTAT2
VALVE2
TSTAT3
OFF
ON
ZONE4PRIORITY
TACO ZVC 404(OREQIV.)
FOURZONEZ ONEVALVECONTROL
WITHOPTIONALPRIORITY
THERMOSTAT
BOILERJACKET
PANEL
1 2
3
T T
1
1
4
2
3
5
6
7
8
2
3
LINEVOLTAGEFACTORYWIRINGSIZE14AWGTYPETWORTEW/AWMWIRE
LINEVOLTAGEFIELDWIRING
VALVE3
TSTAT4
VALVE4
POWER
POWERIN
T T
ZONE1
T T
ZONE2
T T
ZONE3
T T
ZONE4
MODE
NORMAL
RESET
THERMOSTAT THERMOSTAT
ZONE1
1 2 3 4
ZONE2
1 2 3 4
ZONE3
1 2 3 4
ZONE4
1 2 3 4
N/OCOMN/C
ZONE4RELAY
DHW
CIRCULATOR
(SUPPLIEDBY
OTHERS)
JUMPER
3&4
2WIREZONE
VALVE
(NOENDSWITCH)
2WIREZONE
VALVE
(NOENDSWITCH)
1
4WIREZONE
VALVE
(POWEROPEN,
SELFCLOSING)
JUMPER
3&4
PRIORITY
ZONE
FUSE(3AMPMAX.)
24V
TRANSFORMER
L1
POWER
SUPPLY
120/60/1
L2
DHW AQUASTAT
(L4006, L4080)
(SUPPLIED BY OTHERS)
DOMESTIC HOT WATER PRIORITY IS
SELECTED USING ZONE PANEL SWITCH
SYSTEM
CIRCULATOR
(SUPPLIEDBYOTHERS)
WIRINGUSEDWHENDOMESTIC
HOTWATERPRIORITYISDESIRED
N/OCOMN/C
ZONE4RELAY
MAIN
END
SWITCH
EXTRA
END
SWITCH
DHW
CIRCULATOR
(SUPPLIEDBY
OTHERS)
L1
L2
SYSTEM
CIRCULATOR
(SUPPLIEDBYOTHERS)
WIRINGUSEDWHENDOMESTIC
HOTWATERPRIORITYNOTDESIRED
IQ OPTION PANEL
MAIN
END
SWITCH
EXTRA
END
SWITCH
2
3
Figure IW-7: Multiple Zone System with Zone Valve Panel
INTERNAL WIRING (continued)