With a service gauge manifold set connected to a refrigerant compressor as shown in the illustration, which arrangement of the gauge manifold set valves and compressor Service Valves would allow for simultaneous reading of the compressor suction and discharge pressures? GS-RA-03

Illustration GS-RA-03: the U.S. Coast Guard has not released this illustration.

Question

With a service gauge manifold set connected to a refrigerant compressor as shown in the illustration, which arrangement of the gauge manifold set valves and compressor Service Valves would allow for simultaneous reading of the compressor suction and discharge pressures? GS-RA-03

Illustration GS-RA-03: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option B: Valves "2" and "5" both closed, along with valves "1" and "6" both cracked open off their back- seats.. Cracking compressor service valves off their back-seats exposes the gauge ports to system pressures while keeping the compressor in normal operation, with manifold hand valves closed.