Rugged Build: Designed to withstand harsh outdoor environments typical of commercial rooftop applications

and SSZ heat pumps

a dedicated gas line pressure switch

For a clean drop-in installation

Daikin-McQuay 90370 Relay 320788-703 Rugged Build: Designed to withstandThe Daikin McQuay 90370 Relay is a heavy duty 24V SPDT fan relay engineered for precise switching in commercial and residential HVAC systems. Designed with a single pole double throw (SPDT) configuration, this component provides essential control over fan motor speeds and auxiliary circuits, ensuring efficient air handlers and furnace operations. As a veteran preferred HVAC motor relay, it serves as a direct drop in for Daikin 90370 and McQuay 90370