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2 ZVC403–ZVC406 Zone Controls Connected Together with System Pump
TO: BOILER
AQUASTAT RELAY
120 VAC
INPUT
N
24 VAC
H
PUMP END
SWITCH
X
SYSTEM PUMP
(TURNS ON WHEN
ANY ZONE OPENS)
Replacement Zone Valve Controls fuses part number: SR5 -005RP
(Manufacture: Littlefuse, Part Number: 229005)
Optional power stealing thermostat resistor part number: SRTR-001RP
(Value: 1000 Ohms, 1/2 watt or higher)
LIMITED W RR NTY ST TEMENT
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.
ny Taco product or part not installed or operat-
ed in conformity with Taco instructions or which
C
ONTROLS
T CO, INC., 1160 Cranston Street, Cranston, RI 02920
T CO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8.
Visit our web site at: http://www.taco-hvac.com
X
X
R W C
R W
ISOLATED
ZONE 1 ZONE 2 ZONE 3 ZONE 4
END SWITCH
THERMOSTATS (24 VAC) PRIORITY
ZVC 404 – 4
FOUR ZONE
ZONE VALVE CONTROL
24 VAC ZONE VALVES
ZONE 1
ZONE 2
ZONE 4 PUMP
END SWITCH
1 2 3 4
1 2 3 4
X
N/O COM N/C
JUMPER
1
3 & 4
2
3
DRY
TACO 3 WIRE
CONTACTS
ZONE VALVE
2 WIRE ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
WHITE
120 VAC
INPUT
BLACK
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 simi-
lar in design and functionally equivalent to the
defective product or part. Taco reserves the right
to make changes in details of design, construc-
tion, or arrangement of materials of its products
without notification.
T CO OFFERS THIS W RR NTY IN LIEU OF
LL OTHER EXPRESS W RR NTIES.
W RR NTY IMPLIED BY L W INCLUDING
W RR NTIES OF MERCH NT BILITY OR FIT-
M
E
DE
SY
Telephone: (401) 942-8000
THERMOSTATS (24VAC)
See NOTE 1
ZONE 4
PRIORITY
C
R W
C
R W
C
ON
OFF
LED
INDICATORS
POWER
T STAT 1
T STAT 2
T STAT 3
T STAT 4
PRIORITY
ZONE 3
ZONE 4
1 2 3 4
1 2 3 4
JUMPER
NOTE 2: When a circulator
3 & 4
is used on the priority zone
PRIORITY
instead of a zone valve,
ZONE
jumper 3 and 4 of the
MOTOR
END
priority zone.
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
24 VAC
ISOLATED
END SWITCH
ZONE 1
PUMP END
ZONE 4 PUMP
SWITCH
END SWITCH
1 2 3 4
X
X
N/O COM N/C
2 WIRE ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
.
®
F X: (401) 942-2360.
Telephone: 905/564-9422.
NOTE 1: Terminals C are for
optional 24V thermostat
COMMON connections.
VALVE 1
VALVE 2
VALVE 3
VALVE 4
THERMOSTATS (24VAC)
See NOTE 1
X
X
R W C
R W
C
R W
C
R W
C
ZONE 1 ZONE 2 ZONE 3 ZONE 4
THERMOSTATS (24 VAC) PRIORITY
ZVC 404 – 4
FOUR ZONE
ZONE VALVE CONTROL
24 VAC ZONE VALVES
PRIORITY
ZONE 2
ZONE 3
ZONE 4
1 2 3 4
1 2 3 4
1 2 3 4
JUMPER
JUMPER
1
3 & 4
2
PRIORITY
3
ZONE
MOTOR
END
TACO 3 WIRE
SWITCH
ZONE VALVE
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
NESS IS IN EFFECT ONLY FOR THE DUR TION
OF THE EXPRESS W RR NTY SET FORTH IN
THE FIRST P R GR PH BOVE.
THE BOVE W RR NTIES RE IN LIEU OF LL
OTHER W RR NTIES, EXPRESS OR ST TU-
TORY, OR
NY OTHER W RR NTY OBLIG -
TION ON THE P RT OF T CO.
T CO WILL NOT BE LI BLE FOR
CI L, INCIDENT L, INDIRECT OR CONSE-
QUENTI L D M GES RESULTING FROM THE
USE OF ITS PRODUCTS OR NY INCIDENT L
COSTS OF REMOVING OR REPL CING
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 war-
NY
ranty lasts or on the exclusion of incidental or
consequential damages, so these limitations or
exclusions may not apply to you.
F X: 905/564-9436.
ZONE 4
PRIORITY
ON
OFF
LED
INDICATORS
POWER
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
3 & 4
NY SPE-
Printed in US
Copyright 2013
T CO, Inc.
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