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

Claim 0:
1. A heating, ventilation, air conditioning, and refrigeration (HVACR) protection system, comprising:
a pressure sensor operable to sense a pressure within a refrigerant line operably coupled to a compressor;
a timer; and
a protection system controller in communication with the pressure sensor, the timer, and a compressor controller operable to control operation of the compressor, the protection system controller actively disabling the compressor controller from operating the compressor until successful completion of a vacuum test of at least the refrigerant line,
wherein the protection system controller is configured to:
initiate the vacuum test upon the pressure sensor sensing the pressure of the refrigerant line less than or equal to a vacuum test pressure, at which point the timer begins timing for a vacuum test time period, 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
enable operation of the compressor controller to operate the compressor upon successful completion of the vacuum test.