Its SPDT changeover contact is rated for 21 Amps

designed specifically for heavy-duty residential and light commercial HVAC applications

ensuring no-drill

Common Questions What is the maximum water temperature for this valve

ensuring consistent mixing or diverting performance in radiators

Resideo AT40A1139 Transformer 322057-301 Its SPDT changeover contact isThe Resideo AT40A1139 Transformer is a heavy duty 40VA power supply designed for reliable 24V control circuits in residential and light commercial HVACR applications. Engineered with a 240V primary and a 26. 5V secondary output, this NEMA Type D transformer ensures consistent voltage regulation for thermostats, zone valves, and gas valves. The channel frame mounting configuration allows for versatile installation directly onto a junction box or