Huawei NetCol5000-A035 - 5.2.3 Vacuumizing

Figure 5-1 Charging in refrigerant oil
(1) Liquid pipe needle valve (2) Discharge pipe needle
valve
(3) Low-pressure needle valve
(4) Refrigerant oil bucket (5) Low pressure gauge 1 valve (6) High pressure gauge 1
valve
(7) Low pressure gauge 2 valve (8) High pressure gauge 2
valve
(9) Vacuum pump
Step 2 Close Low pressure gauge 1 valve, and open other pressure gauge valves.
Step 3 Open the vacuum pump to charge refrigerant oil to the cooling system. Close the
vacuum pump when the charging is done.
----End
5.2.3 Vacuumizing
Prerequisites
NO TICE
● Before vacuumizing the cooling system, ensure that the refrigerant pipes have
passed the air tightness test and do not leak.
● Before vacuumizing the cooling system, ensure that all connectors are secured.
● System high pressure may occur if the cooling system is not vacuumized or is
not thoroughly vacummized. Ensure that the cooling system is thoroughly
vacummized before refrigerant is charged.
NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm Width) 5 Power-On Commissioning
Issue 17 (2020-10-22) Copyright © Huawei Technologies Co., Ltd. 139