Figure 4-85 NetCol8000-A060 charging nitrogen to pipes with a low-
temperature component (upflow)
(1) Nitrogen cylinder
(2) Reducing valve
(3) Pressure gauge 1
(4) Pressure gauge 2
(5) Low-pressure needle
valve
(6) Exhaust pipe needle valve
(7) Liquid pipe needle valve
Step 2 Open the pressure gauge valves and reducing valve to charge nitrogen into the
pipes to preserve the pressure at 3.0 MPa for 24 hours. The system pressure should
not decrease before and after pressure preservation provided that the ambient
temperature is stable. If the pressure varies due to ambient temperature changes,
conduct the pressure preservation test again.
NO TICE
The outlet pressure must be no more than 3.0 MPa. If the outlet pressure is more
than 3.0 MPa, some parts of the system may be damaged.
Step 3 If the pressure decreases, find out and repair the leakage point by using soap
water or a halogen leak detector. If the pressure is preserved properly, exhaust
nitrogen from the three needle valves.
NO TE
For scenarios where equipment is transported without refrigerant, keep 0.3 to 0.5 MPa of
nitrogen in the pipe.
----End
4.10 (Optional) Leakage Test with Water for the
Water-Cooled Module
Prerequisites
If a water-cooled module is installed, you need to do leakage test with water.
NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
4 System Installation
Issue 05 (2020-10-10)
Copyright © Huawei Technologies Co., Ltd.
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