304P
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 |
Literature
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- Applications - 304P (Aug 2020 - Present)
- Brochure - Zoning with the RoomResponse Signal
- Brochure - Hydronic Zone Control Solutions
- Brochure - Zoning with the RoomResponse Signal (French)
- Installation and Operation - 304P (Feb 2020 - Present)
- Job Record - 304P (Oct 2016 - Present)
- Solutions de contrôle de la zone hydronique
- Specification Sheet - 304P (Dec 2018 - Present)
Archived