designed to mount directly onto a motor shaft with a standard keyway

As a critical HVAC gas control valve

Generic housings often have slight variations in the scroll dimensions

Is the Nordyne 921457 compatible with R-410A systems

supporting multiple sensors or a single high-draw controller

Tjernlund Products MAC1E Control 320788-703 designed to mount directly ontoThe Tjernlund MAC1E Multiple Appliance Control is an essential interface for sequencing draft inducers or power venters with multiple heating appliances. Specifically designed for 24 VAC control circuits, this interlock control allows a single exhaust fan to serve up to two separate gas fired burners or water heaters. When any appliance calls for heat, the MAC1E energizes the fan and verifies the pressure switch circuit before allowing the burner to