Tekmar Switching Relay - 1 Zone

The Switching Relay 301P connects to one thermostat and operates a circulator and boiler to provide heating to a hydronic heating system. The 301P includes optional exercising to prevent circulator seizure when not in use, and optional post purge operation maximize energy savings. Features 20 VA transformer 3-year warranty CSA approved Compatible with all low voltage thermostats Fuse protects pump Hinged cover LED for power and zone Post purge Pump exercising Spare fuse included Thermal circuit breaker protects transformer Top, bottom and back conduit knockouts Specifications Control: Microprocessor control. This is not a safety (limit) control. Packaged weight: 2.5 lb. (1125 g) Dimensions: 6-11/16" H x 4-15/16" W x 2-7/16" D (169 x 123 x 62 mm) Enclosure: Cover: ABS plastic, Base: galvanized steel, NEMA type 1 Approvals: CSA C US Ambient conditions: Indoor use only, 32 to 122°F (0 to 50°C), RH<90% non-condensing Power supply: 115 V (ac) +-10%, 60 Hz, 5 A Transformer: 24 V (ac), 20 VA Control load: 7.5 VA ...