Tekmar 301P Relay Switching One Zone Features: 20 VA transformer Fuse protects pump Pump exercising Hinged cover Spare fuse included LED for power and zone Thermal circuit breaker protects transformer Compatible with all low voltage thermostats Post purge Top, bottom and back conduit knockouts Specifications: Packaged Weight - 2.5lb Control - Microprocessor control. This is not a safety (limit) control 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 - 20 VA at 24 V (ac), 16 VA available for thermostat Control Lead - 7.5 VA at 115 V (ac) Fuse - T5A 250 V slow blow, spare fuse included Pump Relay - 230 V (ac), 5 A, 1/3 hp Boiler XX End Switch - 24 V (ac), 5 A Warranty - Limited 3 Year Warranty Installation Manual