This specific PC control board is primarily designed for select residential cooling units like the MS-A12WA series

and 240 Vac loads with precision

Can this relief valve be used for water or air applications

Common Questions: Why is my burner showing a low flame signal

maintaining the blower assembly's factory-rated CFM

Markel 51135001 Relay 320788-702 This specific PC control boardThe Markel 51135001 Relay is a specialized 24V fan time delay relay engineered for precise sequencing in commercial and residential HVACR applications. As an OEM specified component, it utilizes advanced bimetal disc technology (comparable to Therm O Disc 15S1) to manage the operational timing of indoor blowers, exhaust fans, and cabinet unit heaters. This HVAC ventilation control device ensures that the fan continues to run for a designated period