Lennox 63W40 Pressure Switch 318172-701 The Carrier 50DK500705 Exhaust Regulator

The Carrier 50DK500705 Exhaust Regulator is a critical OEM replacement component designed to maintain precise atmospheric and internal pressure balances within commercial rooftop units and packaged HVAC systems

and the controller provides the common signal to drive the motor clockwise or counter-clockwise as needed

This NAT FV burner assembly features a factory-calibrated #31 orifice to ensure the correct BTU input and optimal combustion characteristics within the flammable vapor (FV) sealed chamber

this TXV replacement is engineered for a brazed installation

Lennox 63W40 Pressure Switch 318172-701 The Carrier 50DK500705 Exhaust RegulatorThe Lennox 63W40 Pressure Switch is a critical OEM replacement component for two stage furnaces and heat pumps, including the G60DF and G60UH series. Designed to ensure safe combustion cycles, this dual pressure switch features factory calibrated set points of 0. 20" WC for low stage operation and 0. 40" WC for high stage performance. As a veteran grade HVAC pressure switch, it monitors the negative pressure generated by the inducer motor, providing