Klarstein Windwalker Smart Manual page 58

EN
58
Vacuuming
Note: Exclusive R32 refrigerant pump must be used in making R32 refrigerant
vacuum.
Before working on the air conditioner, remove the cover of the stop valve (gas and
liquid valves) and be sure to retighten it afterwards (to prevent the potential air leakage).
1. To prevent air leakage and spilling tighten all connecting nut of all flare tubes.
2. Connect the stop valve, charge hose, manifold valve, and vacuum pump.
3. Fully open the handle Lo of the manifold valve and apply vacuum for at least
15 minutes and check that the compound vacuum gauge reads -0.1 MPa
(-76 cmHg).
4. After applying vacuum, fully open the stop valve with a hex wrench.
5. Check that both indoor and outdoor connections are free of air leakage.
Compound meter
-76 cm Hg
Handle Lo
Charge hose
Stop valve
(liquid valve)
Charge hose
Vacuum pump
Stop valve
(gas valve)
Pressure gauge
Manifold valve
Handle Hi