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The maximum test pressure for leak testing a low-pressure centrifugal chiller is _____.
If a strong odor is detected during the recovery process, _______.
a compressor burn-out may have occurred.
Where is refrigerant added to a low-pressure system during the charging process?
The lowest access point on the system such as the evaporator charging valve.
What can be used to pressurize a chiller system before opening the system for a non-major repair?
Controlled hot water
When you install more than one pressure relief valves, they must be installed _______.
in parallel with each other.
During evacuation of systems with large amounts of water, it may be necessary to ______.
increase pressure by introducing nitrogen to counteract freezing.
Which organization establishes the refrigerant safety group standard?
The rupture disk on a low-pressure chiller has a burst pressure of ____.
When leak testing a low-pressure chiller, the maximum pressure to use is ______.
Where is the purge unit located in a low-pressure system?
The top of the condenser.
Under ASHRAE Standard 34, R-134a is classified as ______.