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Page 22mrcool.com
Refrigerant Piping Connection
List of Checks to Perform Possible Malfunctions PASS/FAIL
Is the main body installed securely?
Did you conduct a water leakage test?
Is the unit well insulated from heat?
Does water drain properly from drain
hose?
Is the voltage consistent with
specifications stated on the nameplate?
Are the wires, piping, and valves
installed correctly?
Has the unit been safely grounded?
Do the wire specifications wires comply
with the requirement?
Are there any obstacles blocking the
air inlet or outlet of the units?
Have you recorded the length of
refrigerant pipe and the refrigerant
charging amount?
Is the panel mounted firmly?
Are there any cracks in the air return
or supply pipe?
The unit may fall down, vibrate or produce
noise.
Cooling capacity may become
unsatisfactory.
Condensate, water drops may occur
Condensate, water drops may occur
The unit may fail or its components may
get burned.
The unit may fail or its components may
ignite.
Risk of electric leakage.
The unit may fail or its components may
ignite.
Cooling capacity may become
unsatisfactory.
The refrigerant charging amount can’t be
controlled.
It may cause air leak, vibration, and
condensation.
It may cause air leak, vibration, and
condensation.
Before Test Run
Only perform test run after you have completed the following steps:
• Electrical Safety Checks – Confirm that the electrical system is safe and operating properly
• Gas Leak Checks – Check all flare nut connections and confirm that the system is not leaking
• Confirm that gas and liquid (high and low pressure) valves are fully open
3
Post Installation Checks
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