Install Instructions

24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
H
N
BOILER
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
Note: When a circulator is used on the
priority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
SWITCH SETTINGS
Master/Slave: Master
Reset/Normal: Normal
Priority Zone: On
SWITCH SETTINGS
Master/Slave: Slave
Reset/Normal: Normal
Priority Zone: Off
120 VAC
INPUT
MASTER
SLAVE
SYSTEM PUMP AND BOILER TURN ON
WHEN ANY ZONE VALVE OPENS.
SYSTEM
PUMP
DRY
CONTACTS
DRY
CONTACTS
TO: "TT" ON BOILER
TO: "TT" ON BOILER WITH
DHW "TT" INPUT
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
SEE NOTE
ZVC 406-EXP-4
SIX ZONE EXPANDABLE
ZONE VALVE CONTROL
POWER IN
24 VAC
N/O COM N/C
ZONE 6 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
THERMOSTATS
24 VAC
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
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 NET
EXPANSION
MAIN
PRIORITY
XX
XX
AB
CRW
CRW
CRW
CRW
CRW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES
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
SEE NOTE
ZVC 406-EXP-4
SIX ZONE EXPANDABLE
ZONE VALVE CONTROL
POWER IN
24 VAC
N/O COM N/C
PUMP END
SWITCH
ZONE 6 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
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
VALVE 5
T STAT 6
VALVE 6
POWER
LED
INDICATORS
T STAT 5
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 NET
EXPANSION
MAIN
PRIORITY
XX
XX
AB
CRW
CRW
CRW
CRW
CRW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC)
PRIORITY
24 VAC ZONE VALVES
PRIORITY
PRIORITY
XX
PUMP END
SWITCH
XX
POWER
CONTROLS
ACCESSORY
PORT
FUSE
5 AMP
FUSE
5 AMP
POWER
CONTROLS
ACCESSORY
PORT
FUSE
5 AMP
FUSE
5 AMP
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
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.
CONTROLS MADE EASY.
®
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.
Taco, Inc. will repair or replace without charge
(at the company’s option) any product or part
which is proven defective under normal use
within three (3) years from the date of start-up or
three (3) years and six (6) months from date of
shipment (whichever occurs first).
In order to obtain service under this warranty, it
is the responsibility of the purchaser to promptly
notify the local Taco stocking distributor or Taco
in writing and promptly deliver the subject prod-
uct or part, delivery prepaid, to the stocking dis-
tributor. For assistance on warranty returns, the
purchaser may either contact the local Taco
stocking distributor or Taco. If the subject prod-
uct or part contains no defect as covered in this
warranty, the purchaser will be billed for parts
and labor charges in effect at time of factory
examination and repair.
Any Taco product or part not installed or operat-
ed in conformity with Taco instructions or which
has been subject to misuse, misapplication, the
addition of petroleum-based fluids or certain
chemical additives to the systems, or other
abuse, will not be covered by this warranty.
If in doubt as to whether a particular substance
is suitable for use with a Taco product or part, or
for any application restrictions, consult the
applicable Taco instruction sheets or contact
Taco at [401-942-8000].
Taco reserves the right to provide replacement
products and parts which are substantially sim-
ilar in design and functionally equivalent to the
defective product or part. Taco reserves the
right to make changes in details of design, con-
struction, or arrangement of materials of its
products without notification.
TACO OFFERS THIS WARRANTY IN LIEU OF
ALL OTHER EXPRESS WARRANTIES. ANY
WARRANTY IMPLIED BY LAW INCLUDING
WARRANTIES OF MERCHANTABILITY OR FIT-
NESS IS IN EFFECT ONLY FOR THE DURATION
OF THE EXPRESS WARRANTY SET FORTH IN
THE FIRST PARAGRAPH ABOVE.
THE ABOVE WARRANTIES ARE IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR
STATUTORY, OR ANY OTHER WARRANTY
OBLIGATION ON THE PART OF TACO.
TACO WILL NOT BE LIABLE FOR ANY SPE-
CIAL, INCIDENTAL, INDIRECT OR CONSE-
QUENTIAL DAMAGES RESULTING FROM THE
USE OF ITS PRODUCTS OR ANY INCIDENTAL
COSTS OF REMOVING OR REPLACING
DEFECTIVE PRODUCTS.
This warranty gives the purchaser specific
rights, and the purchaser may have other rights
which vary from state to state. Some states do
not allow limitations on how long an implied
warranty lasts or on the exclusion of incidental
or consequential damages, so these limitations
or exclusions may not apply to you.
LIMITED WARRANTY STATEMENT
Features:
External Indicator Lights
Plug-In PowerPort Cards
Switchable Priority
Simplified Wiring
Add-On Power Controls
Works with 2, 3, or 4-Wire Zone Valves
Compact Design
Fuse Protected
100% Factory Tested
Isolated End Switch
Expandable to 20 Zones
Extra Set of Dry Contacts
Contractor Friendly PC Board Layout
Universal Thermostat Compatibility
Sturdy Screw Connections
Extended 3 Year Warranty
Made in the USA
2 EXP Zone Valve Controls Connected Together
with System Pump
Dip Switch Settings