In order to leak test a low pressure chiller, the chiller pressure
A) chiller pressure must be increased to a positive pressure less than 10 psig
B) should be increased by adding nitrogen
C) chiller refrigerant must be recovered and replaced with nitrogen
D) chiller pressure must be reduced to a safe level, under 150 psig
Question 2
The phases of a planned maintenance service call are:
A) Operational checks and troubleshooting.
B) Routine maintenance, troubleshooting, and replacing parts that cause problems on many systems.
C) Routine maintenance, pre-start inspection, operational checks, and troubleshooting.
D) Routine maintenance and operational checks.
Air pressure under water
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