Aprilaire 51 Relay 322838-752 Designed for seamless field replacement

Designed for seamless field replacement

Field technicians prefer this genuine Carrier part for its precise mounting alignment using bellyband or resilient ring mounts

The 35 to 45 degree F cutout range and 12-degree fixed differential provide precise calibration through a direct-reading scale accessible via a screwdriver slot at the top or bottom of the case

Optimized Heat Transfer: Restores factory-spec thermal output and system efficiency

streamlining damper actuator replacement in the field

Aprilaire 51 Relay 322838-752 Designed for seamless field replacementThe Aprilaire 51 Relay is a high performance current sensing relay engineered for precision in 120V HVAC applications. Designed to monitor electrical load and trigger auxiliary equipment, this HVAC current switch ensures seamless synchronization between your furnace blower and accessories like whole house humidifiers or electronic air cleaners. This Aprilaire 51 sensing relay features a compact, durable design that simplifies the installation process