Troubleshooting; Limited Warranty Statement - Taco ZVC404-EXP-4 Instruction Sheet

2 EXP Zone Valve Controls Connected Together
with System Pump
TO: "TT" ON BOILER WITH
DHW "TT" INPUT
TO: "TT" ON BOILER
BOILER
MASTER
POWER
CONTROLS
WHITE
FUSE
120 VAC
24 VAC 5 AMP
INPUT
BLACK
FUSE
5 AMP
ACCESSORY
PORT
PRIORITY PROTECTION ON
WHITE
120 VAC
INPUT
24 VAC
BLACK
PUMP END ZONE 6 PUMP
SWITCH END SWITCH
X X N/O COM N/C
DRY
CONTACTS
SYSTEM
PUMP
SYSTEM PUMP AND BOILER TURN ON
WHEN ANY ZONE VALVE OPENS.
SLAVE
POWER
CONTROLS
WHITE
FUSE
120 VAC
24 VAC
5 AMP
INPUT
BLACK
FUSE
5 AMP
WHITE
120 VAC
24 VAC
INPUT
PUMP END ZONE 6 PUMP
BLACK SWITCH END SWITCH
X X N/O COM N/C
DRY
CONTACTS
SWITCH SETTINGS
Master/Slave: Slave
Reset/Normal: Normal
Priority Zone: Off
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
SWITCH SETTINGS
Master/Slave: Master
Reset/Normal: Normal
Priority Zone: On
THERMOSTATS
24 VAC
X X X X A B C R W C R W C R W C R W C R W C R W C 1 2
MAIN PRIORITY EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 NET
END SWITCH THERMOSTATS (24 VAC)
ZVC 406-EXP-4
SLAVE MASTER SIX ZONE EXPANDABLE
PRIORITY ON OFF
ZONE VALVE CONTROL
RESET NORMAL
POST PURGE ON OFF
OFF
PUMP EXERCISE ON OFF
30 SEC/2 WK 4 MIN/24 HOUR
24 VAC ZONE VALVES
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
JUMPER
3 & 4
1 MOTOR END
SWITCH
2
3
2 WIRE ZONE VALVE TACO 4 WIRE ZONE VALVE
(POWER OPEN,
(NO END SWITCH) 3 WIRE
ZONE VALVE SELF CLOSING)
MUST USE JUMPER
N
120 VAC
INPUT
H
THERMOSTATS
24 VAC
X X X X A B C R W C R W C R W C R W C R W C R W C 1 2
MAIN PRIORITY EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 NET
END SWITCH THERMOSTATS (24 VAC)
ZVC 406-EXP-4
SLAVE MASTER SIX ZONE EXPANDABLE
ACCESSORY
PORT PRIORITY ON OFF
ZONE VALVE CONTROL
RESET NORMAL
POST PURGE ON OFF
PRIORITY PROTECTION ON OFF
PUMP EXERCISE ON OFF
30 SEC/2 WK 4 MIN/24 HOUR
24 VAC ZONE VALVES
ZONE 1 ZONE 2 ZONE 3 ZONE 4
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
JUMPER
3 & 4
1 MOTOR
2
3
2 WIRE ZONE VALVE TACO 4 WIRE ZONE VALVE
3 WIRE (POWER OPEN,
(NO END SWITCH)
ZONE VALVE SELF CLOSING)
MUST USE JUMPER
Replacement Zone Valve Controls fuses part number: SR5 -005RP
(Manufacture: Littlefuse, Part Number: 229005)
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
Note: When a circulator is used on the
priority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
LED
PRIORITY
INDICATORS
POWER
T STAT 1 VALVE 1
T STAT 2 VALVE 2
T STAT 3 VALVE 3
T STAT 4 VALVE 4
VALVE 5
T STAT 5
PRIORITY
VALVE 6
T STAT 6
ZONE 6
1 2 3 4
JUMPER
3 & 4
SEE NOTE
PRIORITY
ZONE
LED
PRIORITY
INDICATORS
POWER
T STAT 1 VALVE 1
T STAT 2 VALVE 2
T STAT 3 VALVE 3
T STAT 4 VALVE 4
VALVE 5
T STAT 5
PRIORITY
VALVE 6
T STAT 6
ZONE 5 ZONE 6
1 2 3 4
JUMPER
3 & 4
SEE NOTE
PRIORITY
ZONE
END
SWITCH
. ®
F X: (401) 942-2360.
Telephone: 905/564-9422.

Troubleshooting:

• Problem: Digital thermostats do not work cor-
rectly when connected to a zone valve control.
• Solution: Some thermostats are a "Power
Stealing" type which means they are powered by
the zone control with just 2 wires (R & W).
resistor may be needed in order to have the ther-
mostat work properly. This resistor should be
placed between the W & C (common) terminals
of the zone control. If the thermostat manufac-
turer does not supply a resistor, a 1000 ohm ½
watt resistor has proven to work with most mod-
els and is readily available at electronic supply
outlets (e.g. Radio Shack). If the thermostat is bat-
tery powered, then check that the batteries are
fresh and installed correctly.
• Problem: No heat in a zone or room of build-
ing.
• Solution: LED diagnostic lights will help find a
component that is not working properly. The
green LED should always be on, indicating that
power is connected and the fuse is good. When
there is a call for heat, the yellow LED will come
on indicating power to the zone valve. This
indicates the thermostat is working correctly.
When the zone valve fully opens and its end
switch makes contact, the red LED will come
on, the boiler turns on and a circulator will start
if connected to the zone control.
For information on Taco's Zone
Valve Controls (ZVC) including
catalog sheet, instruction sheets,
Visio stencils and our highly
praised Zone Controls Wiring
Guide, scan the QR code to the
right or go to our website:
http://www.taco-hvac.com.
Dip Switch Settings
SLAVE
PRIORITY ON
RESET
POST PURGE ON
PRIORITY PROTECTION ON
PUMP EXERCISE ON
30 SEC/2 WK
Optional power stealing thermostat resistor part number: SRTR-001RP
(Value: 1000 Ohms, 1/2 watt or higher)
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.
MASTER
OFF
NORMAL
OFF
OFF
OFF
4 MIN/24 HOUR
NY SPE-
Printed in US
Copyright 2013
T CO, Inc.