Low Pressure Transducer R23

A low pressure transducer R23 is located on the compressor suction line. The low pressure transducer R23 stops compressor: -33 to -54 kPa, -0.33 to -0.54 bar, 10 to 16 in. Hg vacuum; starts compressor: 24 to 58 kPa, 0.24 to 0.58 bar, 3.5 to 8.5 psig. If the suction pressure becomes too low, the low pressure transducer R23 stops compressor.

  • Compressor stops immediately.

  • Evaporator and condenser fans continue normal operation.

  • Compressor will restart if the low refrigerant condition is corrected as long as power is available. The low pressure transducer R23 stats the compressor when the pressure increase to 24 to 58 kPa, 0.24 to 0.58 bar, 3.5 to 8.5 psig.

Parent topic: Electrical Maintenance

Removal

  1. Disconnect the low pressure transducer R23 wires from the control box.

  2. Remove the low pressure transducer R23 from the suction line. The fitting on the suction line has a shrader valve which will prevent refrigerant leakage.

Installation

  1. Install low pressure transducer R23 in the suction line.

  2. Route wires into the control box and connect to proper terminals.

  3. Perform a controller pretrip test to verify system operation.