The Lennox 78L20 Valve is a professional-grade thermostatic expansion valve (TXV) designed for precision refrigerant metering in 3-ton residential and light commercial AC units

For technicians troubleshooting erratic furnace behavior or total ignition control failure

How do I sync the 999187T with the Service Checker app

Utilizing genuine Reznor heating safety controls ensures the thermal protection of the heat exchanger and maintains the precision performance required in heavy-duty heating applications

whereas the Intermatic T102 wiring is specific to 208-277V systems

Peco Controls TA155-028 Stat 30067439-890 The Lennox 78L20 Valve isThe Peco Controls TA155 028 is a high performance fan coil thermostat engineered for precise climate control in commercial and industrial HVAC applications. This manual changeover thermostat is designed specifically for 2 pipe systems, allowing for seamless toggling between heating and cooling modes via the integrated Heat Off Cool system switch. Utilizing advanced self configuring circuitry, this unit operates across a universal voltage range of