Rheem-Ruud 42-21571-08 SPST Relay Normally Open 24V

The Rheem-Ruud 42-21571-08 Relay is used to control electrical loads based on the low-voltage control signals in HVAC systems. It is a single-pole, single-throw, normally open electromechanical relay that has a 24-volt coil that closes its contact when energized and allows current to pass through it to a part of the circuit to which it is connected, such as a fan, pump, or valve. The thermostat or control board circuit. This relay is in the coordination of the work of condensers, furnaces, and other components by activating loads.