Checking The Nitrogen Pressure; Grounding The Netcol8000-E - Huawei NetCol8000-E220 User Manual

NetCol8000-E220 Modular Indirect Evaporative Cooling
System
User Manual

3.5.3 Checking the Nitrogen Pressure

Procedure
Step 1 Open the No. 2nd maintenance door.
Step 2 Check whether any of the needle valve bonnets shown in
1.
2.
Figure 3-12 Positions of the needle valves
(1) Liquid pipe needle valve 1
(3) Liquid pipe needle valve 2
----End

3.6 Grounding the NetCol8000-E

Ground lugs or ground cables can be used to ground the device. Select either of the two
options. The requirements are as follows:

Issue 02 (2019-10-10)
If they do not exist, contact Huawei technical support.
If they exist, remove each valve bonnet and use it to press the valve plugs in turn. If
nitrogen is exhausted, the system is working properly. If no nitrogen is exhausted,
contact Huawei technical support.
Ground lug: use ground lugs made of hot-dip zinc-coated flat steel with a cross-sectional
area of 40 mm x 4 mm.
Copyright © Huawei Technologies Co., Ltd.
Figure 3-12 is missing by turns.
(2) Low-pressure needle valve 1
(4) Low-pressure needle valve 2
3 Installation Guide
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