Huawei FusionCol8000-C210 User Manual page 114

FusionCol8000-C210 In-room Chilled Water Smart
Cooling Product
User Manual (2022, Netherland GS)
Context
If the unit will be idle for a long time, ensure that the circulating water inside the
system has a temperature no lower than 3°C, or has used antifreeze liquid;
otherwise, the heat exchanger of the smart cooling product may freeze up and
crack. If the water temperature does not meet the requirement, drain all water out
of the unit.
Procedure
Step 1 Remove the plugs from the drainage needle valves 1 and 2 of the heat exchanger,
to drain water naturally until no water flows out.
Figure 5-18 Positions of the drainage needle valves of a heat exchanger
(1) Drainage needle valve 1
Step 2 Connect a nitrogen cylinder to the drainage needle valve 1 of the heat exchanger,
set the intake pressure to 0.5 MPa, and blow nitrogen into the valve for 10
minutes so that the water flows out of the drainage needle valve 2.
Figure 5-19 Connecting a nitrogen cylinder (1)
Step 3 Connect the nitrogen cylinder to the drainage needle valve 2 of the heat
exchanger, set the intake pressure to 0.5 MPa, and blow nitrogen into the valve for
10 minutes, so that the water flows out of the drainage needle valve 1.
Issue 01 (2022-12-30) Copyright © Huawei Digital Power Technologies Co., Ltd.
5 Power-On Commissioning
(2) Drainage needle valve 2
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