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NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
User Manual
4 Power-On Commissioning
Issue 01 (2014-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
62
Context
Ensure that the hose connectors are fastened before vacuumizing the cooling system.
Procedure
Step 1
Connect the refrigerant oil bucket to the low-pressure needle valve and connect the vacuum
pump to the high-pressure needle valve using hoses, as shown in
Figure 4-1
.
Figure 4-1
Charging refrigerant oil
(1) Low-pressure
needle valve
(2) High-pressure
needle valve
(3) Vacuum
pump
(4) Refrigerant oil
bucket
Step 2
Open the vacuum pump to charge refrigerant oil to the cooling system.
Step 3
Close the vacuum pump and remove the chilled oil bucket and vacuum pump.
----End