Watts Tekmar Zone Valve Control 303V Series, Tekmar Zone Valve Control 303V-2, Tekmar Zone Valve Control 303V-1, Tekmar Zone Valve Control 303V-3 Installation Manual
Installation Manual
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Valve
Open
Zone Valve Control 303V
Three Zones with Priority
H3026A
Power
Priority
System
Pump
Zone 1
Zone 2 Zone 3
RoomResponse
TM
Zone Valve Control 303V
The Zone Valve Control 303V connects up to three thermostats and operates a circulator and zone valves to provide
heating to a zoned hydronic heating system.
Features
• RoomResponseTM signal
• Compatible with all low voltage thermostats
• Unlimited zone expansion
• Zone priority
• Priority override
• Pump exercising
• Post purge
• Away signal shared between tekmar thermostats
• LED for each zone, priority, end switch and
RoomResponse
TM
• Four ground screws
• Top, bottom and back conduit knockouts
• Fuses protect transformers and pumps
• Two spare fuses included
• CSA approved
Table of Contents
Important Safety Information ......................................... 2
Installation ...................................................................... 3
Packaging Contents ................................................... 3
Tools Required ........................................................... 3
Materials Required ..................................................... 3
Location ..................................................................... 3
Installing the Enclosure .............................................. 3
Application 303V-1 ..................................................... 4
Application 303V-2 ..................................................... 5
Application 303V-3 ..................................................... 6
User Interface ................................................................. 7
Indicator LED ............................................................. 7
Sequence of Operation .................................................. 7
Technical Data .............................................................. 11
Limited Warranty and Product Return Procedure ........ 12
Important Safety Information
It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards.
tekmar is not responsible for damages resulting from improper installation and/or maintenance.
This is a safety-alert symbol. The safety alert symbol is shown alone or used with a signal word (DANGER,
WARNING, or CAUTION), a pictorial and/or a safety message to identify hazards. When you see this
symbol alone or with a signal word on your equipment or in this manual, be alert to the potential for
death or serious personal injury.
This pictorial alerts you to electricity, electrocution, and shock hazards.
This symbol identifies hazards which, if not avoided, could result in death or serious injury.
This symbol identifies hazards which, if not avoided, could result in minor or moderate injury.
This symbol identifies practices, actions, or failure to act which could result in property damage or
damage to the equipment.
Read manual and all product labels BEFORE using the equipment. Do not use unless you
know the safe and proper operation of this equipment. Keep this manual available for easy
access by all users. Replacement manuals are available at tekmarControls.com
• It is the installer’s responsibility to ensure that this control is safely installed according to all applicable codes
and standards.
• Improper installation and operation of this control could result in damage to the equipment and possibly even
personal injury or death.
• This control is not intended for use as a primary limit control. Other controls that are intended and certified as
safety limits must be placed into the control circuit.
The control includes fuses and transformer that are serviceable. Do not attempt to service any other parts on the
control. Attempting to service the control voids the warranty.
• Strip all wiring to a length of 3/8 in. or 10 mm for all terminals.
• A circuit breaker or power disconnect that provides power to the control should be located nearby and clearly labeled.
• Refer to the current and voltage ratings at the back of this manual before connecting devices to this control.
2 of 12
Radio Frequency Interference
The installer must ensure that this control and its wiring
are isolated and/or shielded from strong sources of
electromagnetic noise. Conversely, this Class B digital
apparatus complies with Part 15 of the FCC Rules and
meets all requirements of the Canadian InterferenceCausing Equipment Regulations. However, if this control
does cause harmful interference to radio or television
reception, which is determined by turning the control
Installation
Packaging Contents
• 1 Zone Valve Control 303V
• 2 Spare fuses (located in cover)
Tools Required
• tekmar or jeweler screwdriver
• Phillips head screwdriver
Materials Required
• 18 AWG LVT solid wire (low-voltage connections)
• 14 AWG solid wire (line-voltage connections)
off and on, the user is encouraged to try to correct the
interference by re-orientating or relocating the receiving
antenna, relocating the receiver with respect to this control,
and/or connecting the control to a different circuit from
that to which the receiver is connected.
Cet appareil numérique de la classe B respecte toutes
les exigences du Règlement sur le matériel brouilleur du
Canada.
• Installation Manual 303V_D
• Needle-nose pliers
• Wire stripper
• Four 1/8” - 1” wood screws
Location
• Keep the control dry. Avoid potential leakage onto the control.
• Maintain relative humidity less than 90% in a non-condensing environment.
• Avoid exposure to extreme temperatures beyond 32-122°F (0-50°C).
• Install away from equipment, appliances, or other sources of electrical interference.
• Install to allow easy access for wiring, viewing, and adjusting the display screen.
• Install approximately 5 feet (1.5 m) off the finished floor.
• Locate the control near pumps and/or zones valves if possible.
• Provide a solid backing which the enclosure can be mounted to. Example: plywood or wall studs.
• Use the conduit knockouts provided on the upper, lower, and back of the enclosure for wiring.
Installing the Enclosure
To prevent the risk of personal injury and/or
death, make sure power is not applied to the
control until it is fully installed and ready for
final testing. All work must be done with power
to the circuit being worked on turned off.
Please be aware local codes may require
this control to be installed or connected by
an electrician.
3 of 12
N
Application 303V-1
Away
C R Rh W
Away
C R Rh W R W
MOD
XX
tN4
T1 T2 T3 T4 T5 T6
A
DHW CRW
BOILER T-STAT 1T-STAT 2T-STAT 3
-
+
tN4
A
CRW
tN4
A
CRW
T-STAT 4
tN4
A
CRW
T-STAT 5
tN4
A
CRW
T-STAT 6 EXPANSION
tN4
A
CRW
tN4
A
BCDE
FUSE 2 FUSE 1
END
SWITCH
MOTOR
POWER
PRIORITYSYS PUMP
ROOM
RESPONSE
ZONE 1
70 80
9060
50 100
MOD MAX %
END
SWITCH
MOTOR
ZONE 2
END
SWITCH
MOTOR
ZONE 3
END
SWITCH
MOTOR
ZONE 4
END
SWITCH
MOTOR
ZONE 5
END
SWITCH
MOTOR
ZONE 6
MASTER MEMBER
OFF
OFF
OFF
T-STAT 1 PRIORITY : ON
EXERCISING : ON
POST PURGE : ON
MOD BOILER : 0-10V
SYSTEM PUMP DURING PRIORITY: ON
SYSTEM PUMP WITH MEMBER CALL: ON
ZONE VALVE END SWITCHES: ON
RESERVED
120 VAC
POWER PUMP PUMP 1
SYSTEM PRIORITY
LNLNLN
OFF
OFF
OFF
4-20 mA
The Zone Valve Control 303V operates three heating zones. When the thermostat calls for heat, the zone valve opens,
the system pump is turned on and the boiler is fired.
Mechanical
Legend
B1 = Boiler
PS = System Pump
T1 = WiFi Thermostat 561, 562 or 563
T2 = Thermostat 518 or 519
T3 = Generic Digital Power-Stealing Thermostat
V1 to V3 = 2-Wire Zone Valves
303V
Electrical
B1
Included 510 Ω
resistor must be
installed when
using power
stealing thermostats
(e.g. Thermostat T3)
B1
L N
PS
T1
PS
T2 T3
V1 V2 V3
4 of 12
V1 V2 V3
DIP Switches
Master
T-stat 1 Priority Off
Exercising On
Post Purge On
Mod Boiler - not applicable
System Pump During Priority On
System Pump With Member Calls Off
Zone Valve End Switches Off
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