• Tekmar 303P Switching Relay for 3-Zones with Priority
  • Tekmar 303P Switching Relay for 3-Zones with Priority
  • Tekmar 303P Switching Relay for 3-Zones with Priority
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Tekmar

Tekmar 303P Switching Relay for 3-Zones with Priority

Tekmar 303P Switching Relay for 3-Zones with Priority

$296.00 CAD
$296.00 CAD
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Tekmar 303P Switching Relay for 3-Zones with Priority

This Tekmar 303P Switching Relay connects up to three thermostats and operates circulators to provide heating to a zoned hydronic heating system. Zone 1 has optional priority over zones 2 and 3 and can be used to provide heat to an indirect domestic hot water tank. The 303P includes optional exercising to prevent circulator seizure when not in use, and optional post purge operation of the last operating zone to maximize energy savings. The 303P provides a RoomResponse™ signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.

Product Features:

  • Pump exercising, post purge
  • Four ground screws, Top, bottom and back conduit knockouts
  • LED for each zone, priority, end switch and RoomResponse™, away signal shared between tekmar thermostats
  • Two spare fuses included
  • CSA approved
  • Unlimited zone expansion, zone priority
  • Priority override, pump exercising
  • Fuses protect transformers and pumps
  • RoomResponse signal, compatible with all low voltage thermostats
  • SKU: Tekmar 303P

Product Specs:

Agency Approvals CSA C US
Ambient Conditions Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent non-condensing
Control Load 7 VA
Control Type Microprocessor control, this is not a safety (limit) control
Dimensions 8-3/16" H x 10-11/16" W x 2-3/8" D (208 x 271 x 60 mm)
Enclosure Material Cover: ABS plastic, Base: galvanized steel
Enclosure NEMA Rating NEMA 1
End Switch Relay 24 V (ac), 5 A
Fuses T5A 250 V slow blow, two spare fuses included
Mod Boiler Output1 0-10 V (dc) 500 ohms min load impedance
Mod Boiler Output2 4-20 mA 1 k ohms max load impedance
Power Supply 115 V (ac) plus / minus 10 percent, 60 Hz, 11 A
Pump Relay 115 V (ac), 5 A, 1/3 hp, 17.3 A combined
Transformer 40 VA at 24 V (ac), expandable to 80 VA with additional transformer M3069 (sold separately)
Zone Valve End Switch 24 V (ac)
Zone Valve Outputs 24 V (ac)
Zoning - Thermostat Type Switching Relay
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