Wiring Guide

102
Instruction Sheet
ZVC403/404/405/406-4 Zone Valve Control
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
1234
ZONE 5
1234
ZONE 6
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 406 – 4
SIX ZONE
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
TO
CIRCULATOR
DRY
CONTACTS
N/O COM N/C
PUMP END
SWITCH
ZONE 6 PUMP
END SWITCH
THERMOSTATS (24VAC)
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
VALVE 5
T STAT 6
VALVE 6
POWER
LED
INDICATORS
T STAT 5
TO: BOILER
AQUASTAT RELAY
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
ISOLATED
XX
END SWITCH THERMOSTATS (24 VAC)
PRIORITY
24 VAC ZONE VALVES PRIORITY
T
T
XX
ZONE 6
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.
FUSE
5 AMP
RW
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
See
NOTE 1
RW
RW RWCCC
RW
C
C
FUSE
5 AMP
RW
C
NOTE 1: Terminals C are for
optional 24V thermostat
COMMON connections.
Powered from Transformer A Powered from Transformer B
A
B
Powered from Transformer A Powered from Transformer B
Operation/External Diagnostics: When any thermostat calls for
heat, the appropriate zone valve is energized and the yellow light
goes on. When the zone valve is fully open, the red light goes on
and energizes the end switch relay. The green light should always
be on, indicating that power is connected.
Priority Operation: When zone 6 is switched to the priority setting
and is actuated, all other zones will stop operation until zone 6 is sat-
isfied. When zone 6 is not switched to priority, all zones will operate
independently. Note: When a circulator is used on the priority zone
instead of a zone valve, jumper 3 and 4 of the priority zone.
Priority Protection Operation: When the priority zone calls con-
tinuously for more than one hour, power is returned to all the
other zones, allowing each zone to function independently. Once
the priority zone is satisfied, the control's auto-reset is activated
and the priority zone is again allowed to have priority for up to one
hour starting from when it calls next.
The Taco Connection: Combine the reliability of the Taco Zone
Valves, Priority Zoning Circulators, Thermostats, and the “00” family
of circulators with the advanced features of the Taco Zone Controls to
achieve total system integration. No matter the application, Taco now
provides the products to maximize system performance while simpli-
fying both installation and service.
Features: External Indicator Lights
Switchable Priority
Priority Protection
Simplified Wiring
Works with 2, 3, or 4-Wire Zone Valves
Compact Design
Fuse Protected
100% Factory Tested
Isolated End Switch
Extra Set of Dry Contacts
Contractor Friendly PC Board Layout
Universal Thermostat Compatibility
UL Approved
Sturdy Screw Connections
Extended 3 Year Warranty
Made in the USA
Wiring Diagram
N/O COM
N/C
PUMP END
SWITCH
ZONE 6 PUMP
END SWITCH
XX
DHW
PUMP
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
DHW PUMP TURNS ON
ONLY WHEN PRIORITY ZONE CALLS.
SECONDARY PUMP COMES ON WHEN ANY ZONE CALLS EXCEPT PRIORITY ZONE.
SYSTEM
PUMP
SECONDARY
PUMP
120
VAC
HOT
NEUTRAL
Optional System
and/or DHW and/or
Secondary Circulators
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
WARNING: Wiring connections must be made in accordance with all
applicable electrical codes. Use copper wire only. 120 VAC wiring must have
a minimum temperature rating of 75°C. Failure to follow this instruction
can result in personal injury or death and/or property damage. 12-18 gauge
wire recommended for 120 VAC connections, 14-22 gauge wire for thermo-
stat connections, and 14-22 gauge wire for 24 VAC source connections.
Specifications:
PRODUCT NUMBER INPUT MAX 24 VAC TYPE 1 ENCLOSURE
NUMBER OF ZONES VOLTAGE OUTPUT @ 25°C WIDTH HEIGHT DEPTH
ZVC406-4 6 with Priority 120/60/1 VAC, 3A 24 VA per Zone12
1
⁄
4
"8" 3"
40 VA per Transformer
The pump end switches are rated
1
⁄
6
hp, 5 amps at 120 VAC. The main and priority end switch connections
are rated 24 VAC, 1 amp. All thermostat and zone valve connections supply a 24 VAC class 2 output.
Do it Once. Do it Right.
®
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: [phone] FAX: [phone].
TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: [phone]. FAX: [phone].
Visit our web site at: http://www.taco-hvac.com
Printed in USA
Copyright 2010
TACO, Inc.