Resideo AT140A1000 Transformer 320819-301 any gas valve replacement requires

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

What is the maximum output rating

Multi-Refrigerant Compatibility: Fully compatible with R-22

Manual Reset Safety: The M/R design requires a technician to inspect the system before restarting

fast response time

Resideo AT140A1000 Transformer 320819-301 any gas valve replacement requiresThe 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