Read the following technical maintenance passage:
During scheduled preventive maintenance on the Field Refrigeration Unit (FRU-400), technicians must verify all system operating parameters. First, maintenance personnel calibrate the high-pressure safety relief valve to trip at 375 PSI. Before introducing refrigerant into the closed loop, the system must hold a vacuum of 500 microns for 45 minutes to verify that all moisture has been eliminated. Once the vacuum verification is complete, the compressor is charged until the steady operating suction pressure stabilizes at 28 PSI under an ambient testing condition of 85 degrees Fahrenheit.
Based on the passage, what is the required steady operating suction pressure during compressor charging?
Answer:Technicians must charge the compressor until the steady operating suction pressure stabilizes at 【28 PSI】.
Answer
28 PSI (or 28 pounds per square inch)
The passage directly links compressor charging to an operating suction pressure of 28 PSI ('the compressor is charged until the steady operating suction pressure stabilizes at 28 PSI').
Step-by-Step Solution
Key Concept
Extracting a specific quantitative measurement from technical text containing multiple competing numerical values.
Estimated Time:1m 0s