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Quick-Change Packing Gland: Allows for seamless maintenance and packing replacement without the need for system pump-down or refrigerant loss
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 OEM blocked inlet switch is calibrated to a specific pressure
The 5/8" x 1 7/8" shaft and resilient base design minimize vibration
Lennox 63W40 Pressure Switch 318172-701 Quick-Change Packing Gland: Allows forThe 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
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