Soleus Air KFHIP-09-OD Operating And Installation Manual page 18

◆Install the Outdoor Unit
• Air Purging and Leakage Test
1. Remove the flare nuts of charging end from gas valve.
2. Connect the charging hose in the middle to the vacuum
pump, then Low-pressure (Lo) end should be connected
to charging end of gas valve. (Shown in Fig. 9)
3. Open the vacuum pump to evacuate. When multi-meter
indicates 1 bar, fully tighten Lo handle of manifold valve
and stop evacuation. Keep it for over 15 minutes to ensure
the pressure is constant.
4. Remove bonnets of gas and liquid valve.
5. Slightly loosen core of liquid valve with hexagon wrench
until the pressure exceeds 0 bars.
6. Remove charging hose from charging end of gas valve and
screw the flare nuts of charging end.
7. Open cores of gas and liquid valve entirely by hexagon
wrench.
8. Tighten the bonnets of gas and liquid valve, and then test
whether there is any leakage or not.
- 16 -