Soleus Air KFHHP-22-ID - Manual (Page 22)

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◆Installation
Air Purging and Leakage Test
1. Connect charging hose of manifold value to
charging end of low pressure valve (both
high/low pressure valves must be tightly shut).
2. Connect joint of charging hose to vacuum pump.
3. Fully open handle of Lo manifold valve.
4. Open the vacuum pump to evacuate. At the
beginning, slightly loosen joint nut of low
pressure valve to check if there is air coming
inside. (Valve of vacuum pump changes from
negative to 0) Then tighten this nut.
5. After finishing evacuation, shut Lo handle of
manifold valve to stop the vacuum pump.
(1) Keep evacuating for 15 minutes and make sure the reading of multi-meter is -1.0 x 14.5 PSI
(-76cmHg).
6. Fully open high/low pressure valves.
7. Remove charging hose from charging end of low pressure valve.
8. Tighten bonnet of low-pressure valve.