6. Turn the stem of the packed valve B about45° counterclockwise for 6~7 seconds afterthe gas coming out,
then tighten the flare nutagain. Make sure the pressure display in thepressure indicator is a little higher than
theatmosphere pressure.
7. Remove the charge hose from the Lowpressure charge hose.
8. Fully open the packed valve stems B and A.
9. Securely tighten the cap of the packed valve.
3.2 Safety and leakage check
3.2.1Electrical safety check
Perform the electric safe check aftercompleting installation:
1. Insulated resistance
The insulated resistance must be more than2MΩ.
2. Grounding work
After finishing grounding work, measure thegrounding resistanceby visual detection andgrounding resistance
tester. Make sure thegrounding resistance is less than 4Ω.
3.Ectrical leakage check (performing duringtest running)
Duringtest operation after finishing installation,the serviceman can use the electroprobe andmultimeter to
perform the electrical leakagecheck. Turn off the unit immediately if leakage happens. Check andfind out the
solutionways till the unit operate properly.
3.2.2 Gas leak check
● Soap water method:
Apply a soap water or a liquid neutral detergent on the indoor unit connectionor outdoor unit connections by a
soft brush to check for leakage of the connectingpoints of the piping. If bubblescome out, the pipes have
leakage.
● Leak detector
Use the leak detector to check for leakage.
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