When recovering the remaining R-134a refrigerant from the centrifugal chiller shown in the illustration as a vapor using the recovery unit's compressor, in addition to opening valves "1a", "1b", and the compressor suction and discharge isolation valves, which of the following would be the correct valve lineup? Illustration GS-RA-28

Illustration GS-RA-28: the U.S. Coast Guard has not released this illustration.

Question

When recovering the remaining R-134a refrigerant from the centrifugal chiller shown in the illustration as a vapor using the recovery unit's compressor, in addition to opening valves "1a", "1b", and the compressor suction and discharge isolation valves, which of the following would be the correct valve lineup? Illustration GS-RA-28

Illustration GS-RA-28: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option C: valves "3", "4", and "6" open; valves "2", "5", "7", "8", and "10" closed. Centrifugal chiller recovery operations require a precise valve lineup that routes vapor from the vessel through the recovery unit compressor while isolating non-essential circuits to ensure complete and efficient evacuation of the refrigerant charge.