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5. When vacuuming the indoor unit and copper pipe, please do not turn on gas / liquid valve,
otherwise refrigerant leakage. Vacuum the unit for at least 15 minutes till negative value shown
on the pressure gauge, and close the manifold gauge.
6. Use a 5mm hex wrench to open two valves.
7. Remove the service pipe of pressure gauge. Put copper nut back. Tighten them with a wrench.
Connect the electric cable as per wiring diagram, and bundle it with the connecting pipe.
8. After confirming that there is no leakage from the system, when the compressor is not in
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