Watts 0121452 Valve 320788-703 This SPDT pneumatic relay is

This SPDT pneumatic relay is designed to either divert a single pilot signal to one of two branch circuits or select between two separate inputs to transmit to a downstream control device

Verify 208V across the primary leads

a common homeowner complaint after motor swaps

Technicians should inspect the existing set screws and bearings during the blower assembly repair and replace them if they show signs of pitting or seize marks

This HVAC blower control module is engineered for high-performance switching

Watts 0121452 Valve 320788-703 This SPDT pneumatic relay isThe Watts 0121452 is a high capacity Series 140X automatic reseating temperature and pressure relief valve designed for heavy duty commercial water heating applications. Engineered for systems requiring high BTU discharge rates, this valve features a 3 4" NPT male inlet and NPT female outlet, rated at 125 PSI with a steam discharge capacity of 1,218,000 BTU hr. The 5 inch thermostat extension ensures accurate thermal sensing deeper within the tank or