Lennox 99K39 Expansion Valve 321894-706 The THT2438 is normally closed

The THT2438 is normally closed

Engineered as a direct substitute for the RLY20001 and RLY20001K legacy boards

It is generally mounted on the suction line or the leaving side of the evaporator coil to monitor the coldest part of the circuit

boosting overall BTUH capacity and performance

Can I use this transformer to replace a 40VA model

Lennox 99K39 Expansion Valve 321894-706 The THT2438 is normally closedAs a veteran HVAC technician, I know that maintaining precise refrigerant control is the difference between a high efficiency system and a compressor failure. The Lennox 99K39 Expansion Valve is a genuine OEM replacement part designed for accurate metering in residential and commercial cooling systems. This Thermostatic Expansion Valve (TXV) utilizes a 3 8 inch inlet and a 1 2 inch outlet to regulate liquid refrigerant flow into the evaporator coil.