The iO HVAC Controls RY-1-HB Relay is a high-reliability 24 Vac SPDT relay designed for seamless integration into standard handy boxes or snap track mounting environments

The IAA-901 designation indicates a 115V

Ensure the plunger is clean and free of debris

Its high-flow design minimizes pressure drop across the 1-1/2 inch port

the S1-029-25456-000 is the official direct replacement for the S1-029-20423-043 model

Trane SFSWT3534 Auxiliary Swtch 322056-301 The iO HVAC Controls RY-1-HBThe Trane SFSWT3534 Auxiliary Switch is a critical electrical component designed for high performance monitoring and control within OEM HVAC systems. This SPDT auxiliary switch features a 1NO 1NC contact configuration, providing technicians with the flexibility to manage secondary circuits, status indicators, or safety interlocks. Engineered with a 20 60A current rating and a voltage range of 20V 60V AC, it is built to handle the rigorous electrical