and constant flame sensing

Is this a direct replacement for older McQuay units

mitigating noise and reducing bearing stress

ensuring the evaporator is cleared of frost before the compressor restarts

Normally closed configuration with spring return fail-safe provides mechanical shut-off during power interruptions

York S1-025-45294-000 Expansion Valve 320735-701 and constant flame sensingThe York S1 025 45294 000 is an OEM thermal expansion valve (TXV) engineered for high efficiency R410A refrigerant systems. This externally equalized valve features 3 8 x 5 8 ODF solder connections, ensuring a leak resistant seal in residential and light commercial air conditioning applications. Designed to modulate refrigerant flow based on heat load, it maintains the precise superheat required to prevent liquid slugging and protect the compressor.