The TDR keeps the blower running for a set duration after the thermostat is satisfied

as this unit is configured for CW lead end rotation and requires a 5 MFD / 370V capacitor

Safety Assurance: Provides a robust barrier against carbon monoxide leakage

reducing hunting and improving overall system efficiency in Building Automation Systems (BAS)

The internal mechanism features a snap-acting SPDT switch

Lennox 63W56 Pressure Switch 318973-401 The TDR keeps the blowerThe Lennox 63W56 Pressure Switch is a dual stage combustion air prover designed for precise draft monitoring in high efficiency gas furnaces. This SPST normally open switch features dual setpoints of 0. 35" WC and 0. 60" WC, facilitating the sequenced operation required for two stage heating cycles. Engineered as a direct OEM replacement part, it ensures the inducer motor maintains proper static pressure before allowing the ignition sequence to