Brochure

Submittal Data Information
Zone Valve Control
Submittal Data # 101-055 & 102-399 Effective: 07/26/10
Supersedes: 07/11/07
Features
Front Diagnostic Lights
Switchable Priority
Built-in Priority Protection
Simplified Wiring
Works with 2, 3, or 4-Wire Zone Valves
Compact Design
Fuse Protected
100% Factory Tested
Two Pump End Switches can
control up to 3 pumps; System,
Secondary and DHW
Contractor Friendly PC Board Layout
Universal Thermostat Compatibility
24 Volt Power Output for
hard wired thermostats
Field Replaceable Transformer
UL Approved
Extended 3 Year Warranty
Made in the USA
Additional -EXP Features
Add-on Power Control Plug
Built-in; Post Purge and Pump
Exercise Functions
Two boiler contacts, utilizes full
functionality of Mod-Con boilers
Expandable to 20 Zoning Panels
(120 zones if all are 6 zone panels)
Interface with -EXP Switching Relays
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 simplifying both
installation and service.
External Diagnostics
It’s no longer necessary to remove the
box cover to troubleshoot the system.
External visible indicator lights show full
functionality of all products wired to the
zone valve controls. When the thermostat
calls for heat, both the appropriate zone
valve and yellow indicator lights are
energized. When the zone valve is fully
opened, the end switch relay and red
indicator light is then energized.
Zone Valve Controls
Taco Zone Valve Controls work with two-, three-, or four-wire zone valves. Fully fuse
protected, they also include two isolated end switches and built-in priority protection.
The contractor friendly PC board layout eliminates the problems caused by incorrect wiring
and the “unfinished” look of conventional zone valve installations. The sturdy screw connections
add additional reliability, while the external indicator lights provide instant diagnostic feedback,
reducing installation time. All Taco Zone Valve Controls are UL listed and carry an extended
3 year warranty.
Taco Expandable Zone Valve Controls
Whether you want to expand up to 120 zones or utilize the advanced features of the Add-on
Power Controls, Taco -EXP controls allow for simple integration of advanced features. Built-in
Post Purge and Pump Exercise functions can optimize the operation of any system.
Zone Valve Controls
Product Number Transformer Transformer Dimensions of Enclosure
Number of Zones Rating Voltage Width Height Depth
ZVC403 3 Zone with Priority 40 VA 120 VAC Input 10-1/4” 7” 2-3/4”
ZVC404 4 Zone with Priority 40 VA 120 VAC Input 10-1/4” 7” 2-3/4”
ZVC405 5 Zone with Priority 80 VA 120 VAC Input 12-1/4” 8” 3”
ZVC406 6 Zone with Priority 80 VA 120 VAC Input 12-1/4” 8” 3”
Expandable Zone Valve Controls
Product Number Transformer Transformer Dimensions of Enclosure
Number of Zones Rating Voltage Width Height Depth
ZVC404-EXP 4 Zone with Priority 80 VA 120 VAC Input 12-1/4” 8” 3”
ZVC406-EXP 6 Zonewith Priority 80VA 120 VAC Input 12-1/4” 8” 3”
Taco Inc., 1160 Cranston Street. Cranston, RI 02920 / [phone] / Fax [phone]
Taco (Canada) Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8 / [phone] / Fax [phone]
www.taco-hvac.com
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..
Add-On Power Controls*
PC700 Boiler Reset Control
PC702 2-Stage Boiler Reset Control
PC705 Variable Speed Pump Injection Mixing Control
* For use with -EXP controls
Wiring Diagram
1 2 3 4
ZONE 1
1 2 3 4
ZONE 2
1 2 3 4
ZONE 3
1 2 3 4
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
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
TO
CIRCULATOR
DRY
CONTACTS
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: 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
TO: "TT" ON BOILER
TO: "TT" ON BOILER WITH
DHW "TT" INPUT
ZONE 1 ZONE 2 ZONE 3 ZONE 4 NET
EXPANSION
MAIN
PRIORITY
X X X X A B C R W C R W C R W C R W C 1 2
END SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES
ACCESSORY
PORT
PRIORITY
X X
FUSE
5 AMP
FUSE
5 AMP
Powered from Transformer A Powered from Transformer B
A
B
Powered from Transformer A Powered from Transformer B
N/O
COM
N/C
PUMP END
SWITCH
ZONE 4 PUMP
END SWITCH
X X
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