use the dedicated vacuum port

Leak-Free Reliability: Dual EPDM O-ring seals and reinforced seats provide an ANSI Class IV leakage rating for tight shutoff throughout the valve's lifecycle

and larger contaminants to prevent fouling of the primary heating and cooling coils

Precise Control: Features an external equalization line to accurately sense evaporator pressure

Using it in a system rated for different wattage will change the resistance and amp draw

Heatcraft Refrigeration 2930005 Pressure Valve 326070-701 use the dedicated vacuum portThe Heatcraft Refrigeration 2930005 is a high performance Headmaster Pressure Valve designed for precise head pressure control in commercial refrigeration systems. Built for heavy duty applications, this head pressure control valve monitors and maintains stable discharge pressures, even during substantial ambient temperature drops. For technicians servicing walk in coolers, freezers, and industrial HVAC equipment, the 2930005 eliminates operational