Westinghouse 664073 Indoor Restrictor Orifice Heat Pump

Product Description

The WESTINGHOUSE 664073 is an indoor restrictor orifice designed for single package heat pump systems. This precision-sized orifice measures 0.073 inches and controls refrigerant flow on the indoor side of the refrigeration circuit, maintaining proper system balance and efficiency. It is a direct replacement component installed by licensed HVAC technicians during routine maintenance or when system performance indicates a metering device issue. The 664073 is an OEM-specified part for the Q3RX series heat pump platform.

This indoor restrictor is used specifically in single package heat pump applications where a fixed orifice serves as the refrigerant metering device. It is installed on the indoor coil side of the system and is compatible with Q3RX-036E and Q3RX-036g models. Technicians typically encounter this part during refrigerant circuit diagnosis, coil replacement, or scheduled preventive maintenance on light commercial or residential package units.

Key Features

• Fixed 0.073-inch orifice diameter for precise refrigerant metering
• Designed as an indoor restrictor for single package heat pump systems
• OEM-specified replacement for Q3RX-036E and Q3RX-036g units
• Direct fitment eliminates field modification

Compatibility

Designed for use with WESTINGHOUSE single package heat pump models Q3RX-036E and Q3RX-036g in the Q3RX series.

Installation Notes

Installation should be performed by a licensed HVAC technician. Recover all system refrigerant and depressurize the circuit before removing or installing any metering device. Follow applicable EPA Section 608 regulations for refrigerant handling. Verify orifice size and orientation match OEM specifications before completing the repair and recharging the system.