Resideo AT140A1000 Transformer 320819-301 System Protection: Actively prevents expensive

System Protection: Actively prevents expensive water damage by eliminating overflow risks in non-gravity drainage setups

By maintaining strict temperature control

375-inch width

Multi-Refrigerant Compatibility: Fully compatible with R-22

any gas valve replacement requires a digital combustion analysis to set the high and low modulation firing rates

Resideo AT140A1000 Transformer 320819-301 System Protection: Actively prevents expensiveThe Resideo AT140A1000 Transformer is a heavy duty 40 VA solution designed to provide reliable 24V power for residential and light commercial HVAC control systems. As a Class 2 step down transformer, it converts a 120V primary input to a 27V secondary (open circuit), ensuring stable operation for thermostats, gas valves, relays, and zone controllers. This unit is built for versatile field application, featuring multiple mounting configurations