The VAB series is designed for standard high-pressure refrigeration applications

normally closed (N/C) piloted diaphragm unit

Soft Start Technology: Reduces peak amperage draw and minimizes duct noise during startup cycles

provided the coil voltage and pole count match the original HVAC contactor specifications

is a high-performance thermostatic expansion valve (TXV) engineered for precision refrigerant metering in low-temperature refrigeration systems

Heat Controller 17120300000527 Main Board 322057-301 The VAB series is designedThe Heat Controller 17120300000527 Main Board is an essential OEM replacement component designed to manage the core operational logic of compatible HVAC systems. As a primary HVAC control board, this unit facilitates seamless communication between the thermostat inputs, compressor performance, and blower motor stages. For technicians troubleshooting a non responsive condenser or erratic fan cycling, installing a genuine 17120300000527 midea main