Sub-Master Design: Responds accurately to master controller signals for effective pneumatic reset control

It does not include a selector switch or the SPDT internal wiring required for cooling or heat/cool changeover applications

and R-12 units

this specific model is designed for a 120Vac primary voltage

ensuring a secure and low-resistance electrical contact necessary for millivolt-sensitive gas valves

Lennox 49W64 Reversing Valve R-410A Sub-Master Design: Responds accurately toThe Lennox 49W64 Reversing Valve is a critical 4 way component engineered for heat pump refrigerant flow control in residential and light commercial systems. Operating with a 24V solenoid coil, this valve facilitates the essential transition between heating and cooling modes by redirecting discharge gas from the compressor. Designed as a direct OEM replacement part, the 49W64 is electrically and mechanically identical to Lennox 49W6401, ensuring