Engine: Refrigeration AC

1. A It automatically shuts down the recovery unit compressor when the recovery cylinder becomes 80% full.
2. B It automatically shuts down the recovery unit compressor when the discharge pressure becomes excessive.
3. C It automatically shuts down the recovery unit compressor when the refrigeration system has reached a depth of 15" Hg.
4. D It automatically transitions the recovery unit from the direct liquid recovery mode to the direct vapor recovery mode.

Tip: press A-D to answer