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303P | 3 Pump Switching Relay | Tekmar

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Tekmar 303P Documents

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Overview

Details for 303P

3 Pump Switching Relay

The Switching Relay 303P 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.

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