Critical Safety: Acts as a primary hi-limit safety control to interrupt power to the heating element when dangerous temperatures are detected

Frequent cycling or over-amping can cause the internal contacts to weld together

eliminating soot buildup and unstable pilot flames

it fits standard Class R fuse blocks and includes a rejection feature to prevent the installation of lower-rated fuses

Optimized Compressor Protection: Maintains oil temperature to prevent refrigerant dilution and ensures smooth compressor start-up

Watts 0342691 Relief Valve Critical Safety: Acts as aThe Watts 0342691 (Model 335M2) is a high capacity boiler pressure relief valve engineered for hydronic heating systems and low pressure steam applications. Featuring a 3 4" female NPT inlet and 3 4" female NPT outlet, this ASME Section IV rated safety valve is factory set to 30 PSI, providing critical overpressure protection for residential and light commercial boilers. With a steam discharge capacity of 510,000 BTU hr, it serves as the direct