Proper installation of this HVAC safety switch prevents heat exchanger cracking and maintains peak system efficiency by preventing thermal overstress

provided the physical footprint and 120V coil voltage match

Smith Cyclone models requiring a standard thermostat bulb well

it utilizes 1/2-inch FNPT x FNPT porting for secure

and the control signal to terminal 3

Lennox 21G88 Disconnect Switch 321702-401 Proper installation of this HVACThe Lennox 21G88 Disconnect Switch is a heavy duty, 3 pole electrical safety component engineered for high demand industrial and commercial HVACR applications. Rated for 600V 150Amp service, this unit provides a reliable manual breaking point to isolate 3 phase power during critical system maintenance or emergency repairs. Built with a rugged steel housing and a high conductivity copper alloy contact system, the 21G88 is designed to withstand the