304P

Product Image - 304P
Product Image - 304P
Product Image - 304P

Part of the 304P Series

Ordering Code: 304P

UPC: 779655030402

Switching Relay, Four Zones with Priority

 

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tekmar Home




The Switching Relay 304P connects up to four thermostats and operates circulators to provide heating to a zoned hydronic heating system. Zone 1 has optional priority over zones 2 through 4 and can be used to provide heat to an indirect domestic hot water tank. The 304P 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 304P provides a RoomResponse (TM) signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.

  • Away signal shared between tekmar thermostats, four ground screws
  • Priority override, pump exercising
  • CSA approved
  • Unlimited zone expansion, zone priority
  • RoomResponse (TM) signal, compatible with all low voltage thermostats
  • Two spare fuses included
  • Post purge, LED for each zone, priority, end switch and RoomResponse (TM)
  • Top, bottom and back conduit knockouts
  • Fuses protect transformers and pumps
Specifications
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 at 24 V (ac)
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 Boiler, DHW 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, 20 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)
Zoning - Thermostat Type Switching Relay

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