Prepare a vacuum pump and a pressure gauge,
connect one end of the pressure gauge to the vacuum pump.
The other end should be connected to high pressure
refrigerant port on the outdoor unit.
Open the pressure gauge, and set the vacuum pump to run
for 10 minutes. Once the pressure gauge shows a negative
pressure reading, turn off the vacuum pump and the gauge.
Disconnect the tube ends of pressure gauge, and install
the copper nut back to the high pressure connection port.
Remove the copper nut from the gas and liquid valves.
open the valves all the way using a hexagon spanner.
Check for any leakage using a detector, or soapy water.
If no leakage is detector, retighten the the copper nuts back
onto the valves.
72
C
4. Installation Walkthrough
4.6. Refrigerant Pipework
