Patent ID: 11933530
Assignee: RAYTHEON COMPANY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 15:
16. A computer implemented method for protecting a heating, ventilation, air conditioning, and refrigeration (HVACR) system comprising a compressor, a refrigerant line operably coupled to the compressor, and a compressor controller operable to control operation of the compressor, the method comprising:
receiving pressure sensor output data generated by a pressure sensor operably coupled to the refrigerant line;
determining whether the pressure sensor sensed a pressure of the refrigerant line less than or equal to a vacuum test pressure, wherein upon the pressure of the refrigerant line being less than or equal to the vacuum test pressure, a vacuum test is initiated and a timer begins timing for a vacuum test time period, and wherein the vacuum test is successfully completed upon expiration of the vacuum test time period and the pressure of the refrigerant line remaining less than or equal to the vacuum test pressure for the duration of the vacuum test time period; and
enabling active operation of the compressor controller to operate the compressor upon successful completion of the vacuum test.