Lennox 97W21 Pressure Switch 318172-701 ensuring the sequencing and blower

ensuring the sequencing and blower delays function according to OEM specifications

A 1/8-inch bead of high-temp RTV silicone (rated for at least 500°F) is required around the flange to prevent exhaust leaks and ensure the induced draft motor pulls a proper vacuum

orchestrating the system communication between thermostats

it is intended to support the installation or repair of larger assemblies

Horizontal Orientation: Stable mounting design prevents flame lifting or shifting during high-airflow starts

Lennox 97W21 Pressure Switch 318172-701 ensuring the sequencing and blowerThe Emerson 1F95 0680 Blue 6 Inch Touchscreen Thermostat is a heavy duty, universal programmable thermostat built for commercial HVACR applications. Engineered for maximum flexibility, this 4H 2C digital control integrates seamlessly with single stage, multi stage, and heat pump systems, including high performance dual fuel heat pump setups. Its 6 square inch blue backlit display provides clear visibility for technicians and facility managers,