Taco Comfort Solutions ZVC406 User manual

1 2 3 4
ZONE 1
1 2 3 4
ZONE 2
1 2 3 4
ZONE 3
1 2 3 4
ZONE 4
1 2 3 4
ZONE 5
1 2 3 4
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
ZVC 406 – 4
SIX ZONE
ZONE VALVE CONTROL
THERMOSTATS
(24VAC)
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
TO: BOILER
AQUASTAT RELAY
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
ISOLATED
X X
END SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES PRIORITY
T
T
ZONE 6
PRIORITY
OFF
ON
NOTE 3: When a circulator
is used on the priority zone
instead of a zone valve,
jumper 3 and 4 of the
priority zone.
FUSE
5 AMP
R W
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
See NOTE 1
R W R W R WC C C
R W C
C
FUSE
5 AMP
R W C
Powered from Transformer APowered from Transformer B
Powered from Transformer APowered from Transformer B
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
N/O
COM
N/C
PUMP END
SWITCH
ZONE 6 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
HOT
NEUTRAL
N
H
NOTE 1: Terminals Care for
optional 24V thermostat
COMMON connections.
NOTE 2: Resistor (1K ,
1⁄2W)
may be needed between
Wand Cterminals.
See NOTE 2
24 VAC
FACTORY
INSTALLED
TRANSFORMER
WHITE
BLACK
A
B
O eration/External Diagnostics: When any thermostat calls for heat,
the appropriate zone valve is ener ized and the yellow li ht oes on.
When the zone valve is fully open, the red li ht oes on and ener izes
the end switch relay. The reen li ht should always be on, indicatin
that power is connected.
Priority O eration: When zone 6 is switched to the priority settin and
is actuated, all other zones will stop operation until zone 6 is satisfied.
When zone 6 is not switched to priority, all zones will operate indepen-
dently. Note: When a circulator is used on the priority zone instead of a
zone valve, jumper 3 and 4 of the priority zone.
Priority Protection O eration: When the priority zone calls contin-
uously for more than one hour, power is returned to all the other
zones, allowin each zone to function independently. Once the priori-
ty zone is satisfied, the control's auto-reset is activated and the priority
zone is a ain allowed to have priority for up to one hour startin from
when it calls next.
Wiring Diagram:
102-397
SUPERSEDES: F bruary 1, 2013 EFFECTIVE: D c mb r 20, 2013
Plant ID# 9300-2879
Instruction Sheet
ZVC406 Zone Valve Control
WARNING: Wirin connections must be made in accordance with all
applicable electrical codes. Use copper wire only. 120 VAC wirin must
have a minimum temperature ratin of 75°C. Failure to follow this
instruction can result in personal injury or death and/or property
dama e. 12-18 au e wire recommended for 120 VAC connections,
14-22 au e wire for thermostat connections, and 14-22 au e wire for
24 VAC source connections.
S ecifications:
PRODUCT NUMBER INPUT MAX 24 VAC TYPE 1 ENCLOSURE
NUMBER OF ZONES VOLTAGE OUTPUT @ 25°C WIDTH HEIGHT DEPTH
ZVC406-4 6 with Priority 120/60/1 VAC, 3A 24 VA per Zone 121⁄4" " 3"
40 VA per Transformer
The pump end switches are rated 1⁄6hp, 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.
Troubleshooting:
• Problem: Di ital thermostats do not work correctly when connected
to a zone valve control.
• Solution: Some thermostats are a “Power Stealin ” type which means
they are powered by the zone control with just 2 wires (R& W). A resis-
tor may be needed in order to have the thermostat work properly. This
resistor should be placed between the W& C(common) terminals of
the zone control. If the thermostat manufacturer 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. . Radio Shack).
If the thermostat is battery powered, then check that the batteries are
fresh and installed correctly.
• Problem: No heat in a zone or room of buildin .
• Solution: LED dia nostic li hts will help find a component that is
not workin properly. The reen LED should always be on, indicat-
in that power is connected and the fuse is ood. When there is a call
for heat, the yellow LED will come on indicatin power to the zone
valve. This indicates the thermostat is workin 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 con-
nected to the zone control.
For information on Taco’s Zone Valve Controls
(ZVC) includin catalo sheet, instruction sheets,
Visio stencils and our hi hly praised Zone Controls
Wirin Guide, scan the QR code to the ri ht or o
to our website: http://www.taco-hvac.com.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received, including interference
that may cause undesired operation.

Taco, Inc. will r pair or r plac without charg
(at th company’s option) any product or part
which is prov n d f ctiv und r normal us
within thr (3) y ars from th dat of start-up or
thr (3) y ars and six (6) months from dat of
shipm nt (which v r occurs first).
In ord r to obtain s rvic und r this warranty, it
is th r sponsibility of th purchas r to promptly
notify th local Taco stocking distributor or Taco
in writing and promptly d liv r th subj ct prod-
uct or part, d liv ry pr paid, to th stocking dis-
tributor. For assistanc on warranty r turns, th
purchas r may ith r contact th local Taco
stocking distributor or Taco. If th subj ct prod-
uct or part contains no d f ct as cov r d in this
warranty, th purchas r will b bill d for parts
and labor charg s in ff ct at tim of factory
xamination and r pair.
Any Taco product or part not install d or op rat-
d in conformity with Taco instructions or which
has b n subj ct to misus , misapplication, th
addition of p trol um-bas d fluids or c rtain
ch mical additiv s to th syst ms, or oth r
abus , will not b cov r d by this warranty.
If in doubt as to wh th r a particular substanc
is suitabl for us with a Taco product or part, or
for any application r strictions, consult th
applicabl Taco instruction sh ts or contact
Taco at [401-942-8000].
Taco r s rv s th right to provid r plac m nt
products and parts which ar substantially simi-
lar in d sign and functionally quival nt to th
d f ctiv product or part. Taco r s rv s th right
to mak chang s in d tails of d sign, construc-
tion, or arrang m nt of mat rials 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 STATU-
TORY, OR ANY OTHER WARRANTY OBLIGA-
TION 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 giv s th purchas r sp cific
rights, and th purchas r may hav oth r rights
which vary from stat to stat . Som stat s do
not allow limitations on how long an impli d war-
ranty lasts or on th xclusion of incid ntal or
cons qu ntial damag s, so th s limitations or
xclusions may not apply to you.
LIMITED WARRANTY STATEMENT
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
PRIORITY
ZONE
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
ZVC 404 – 4
FOUR ZONE
ZONE VALVE CONTROL
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
SYSTEM PUMP
(TURNS ON WHEN
ANY ZONE OPENS)
DRY
CONTACTS
N/O COM
N/C
PUMP END
SWITCH
FUSE
5 AMP
ZONE 4 PUMP
END SWITCH
T STAT 1 VALVE 1
T STAT 2 VALVE 2
T STAT 3 VALVE 3
T STAT 4 VALVE 4
POWER
LED
INDICATORS
TO: BOILER
AQUASTAT RELAY
24 VAC ZONE VALVES PRIORITY
X X
ZONE 4
PRIORITY
OFF
ON
NOTE 2: When a circulator
is used on the priority zone
instead of a zone valve,
jumper 3 and 4 of the
priority zone.
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
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
ZVC 404 – 4
FOUR ZONE
ZONE VALVE CONTROL
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
N/O COM
N/C
PUMP END
SWITCH
FUSE
5 AMP
ZONE 4 PUMP
END SWITCH
T STAT 1 VALVE 1
T STAT 2 VALVE 2
T STAT 3 VALVE 3
T STAT 4 VALVE 4
POWER
LED
INDICATORS
24 VAC ZONE VALVES PRIORITY
XX
ZONE 4
PRIORITY
OFF
ON
2 WIRE ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
N
H
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ISOLATED
X X
END SWITCH THERMOSTATS (24 VAC) PRIORITY
THERMOSTATS (24VAC)
R W RW RW
CCC
See NOTE 1
RW
C
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ISOLATED
X X
END SWITCH THERMOSTATS (24 VAC) PRIORITY
THERMOSTATS (24VAC)
RW RW RWCCC
See NOTE 1
RW
C
NOTE 1: Terminals Care for
optional 24V thermostat
COMMON connections.
2 ZVC403–ZVC406 Zone Controls Connected Together with System Pum
CONTROLS MADE EASY.®
TACO, INC., 1160 Cranston Str t, Cranston, RI 02920 T l phon : [phone] FAX: [phone].
TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. T l phon : 905/564-9422. FAX: [phone].
Visit o r web site at: http://www.taco-hvac.com
Print d in USA
Copyright 2013
TACO, Inc.
Optional power stealing thermostat resistor part number: SRTR-001RP
(Value: 1000 Ohms, 1/2 watt or higher)
Replacement Zone Valve Controls fuses part number: SR5A-005RP
(Manufacture: Littlefuse, Part Number: 229005)