Description
The York S1-02421678700 Control Relay operates on a 24V coil rated for 50/60Hz input, closing its contact to switch higher-voltage loads in response to low-voltage controlling signals. Its SPST configuration provides a direct switching path within the control circuit, activating or deactivating connected loads accuratly when the coil receives the trigger voltage. Fan coil units and air handlers throughout HVAC systems use this relay to manage blower motor activation, valve control signals, and auxiliary load switching during heating and cooling sequences. The compact body mounts within standard control panels, connecting directly to existing wiring without terminal changes.
