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Wiring
Diagram
WHITE
120 VAC
INPUT
BLACK
WHITE
120 VAC
INPUT
BLACK
Installation of
Optional System
Circulator
N/O COM N/C
END
SWITCH
T
BOILER
T
120 VAC
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.
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 integra-
tion. No matter the application, Taco now provides the
products to maximize system performance while simplify-
ing both installation and service.
Warning: Wiring connections must be made in accordance with all applicable
electrical codes. Use copper wire only. Failure to follow this instruction can result
in personal injury or death and/or property damage. 10-18 gauge wire recom-
mended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for
thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24
VAC source with 5 in.lbs. max torque.
Do it Once. Do it Right.
TACO, INC., 1160 Cranston Street, Cranston, RI 02920
TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3.
Visit our web site at: http://www.taco-hvac.com
24 VAC
24 VAC
N/O COM N/C
END
SWITCH
T
T
TO CIRCULATOR
OR BOILER
AQUASTAT RELAY
DRY
CONTACTS
HOT
NEUTRAL
Telephone: (401) 942-8000
Instruction Sheet
ZVC403 & ZVC405 Zone Valve Control
THERMOSTAT
THERMOSTAT
24 VAC
T T
T T
T T
ZONE 1
ZONE 2
ZONE 3
ZVC 405
FIVE ZONE ZONE VALVE CONTROL
ZONE 1
ZONE 2
ZONE 3
1 2 3 4
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
Specifications:
PRODUCT
NUMBER
NUMBER
OF ZONES
ZVC403
3 Zone
ZVC405
5 Zone
All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of
1
⁄
hp (5A) @ 120 VAC.
6
Features: External Indicator
Lights
Simplified Wiring
Works with 2, 3, or 4-
Wire Zone Valves
Compact Design
Fuse Protected
100% Factory Tested
Isolated End Switch
FAX: (401) 942-2360.
Telephone: 905/564-9422.
THERMOSTAT
T T
T T
ZONE 4
ZONE 5
ZONE 4
ZONE 5
1 2 3 4
1 2 3 4
MOTOR
END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN, SELF CLOSING)
TRANSFORMER
MAX OUTPUT
DIMENSIONS OF ENCLOSURE
VOLTAGE
AT 24 VAC
WIDTH
120 VAC Input
40 VA
10
120 VAC Input
80 VA
11
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
FAX: 905/564-9436.
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
T STAT 5
VALVE 5
POWER
HEIGHT
DEPTH
1
3
3
⁄
"
6
⁄
"
2
⁄
"
4
4
4
3
1
⁄
"
7
⁄
"
3"
4
2
Printed in USA
Copyright 2000
TACO, Inc.
93
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