NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 3-35 Top pipe routing
Step 2 Route the drainpipe from the top by referring to Step 2–Step 5 of the bottom pipe routing.
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3.10 Leak Checking
Prerequisites
Pipes from indoor unit and outdoor unit have been soldered properly.
The needle valve plugs are tightened.
The measuring range of the pressure gauge must be greater than or equal to 4.0 MPa, and
the tolerance range of the leather hose must be greater than or equal to 4.5 MPa.
Only nitrogen is allowed when leak checking.
Do not remove the pressure gauge and the leather hose when charging nitrogen to retain
the pressure to prevent the nitrogen from leaking.
Procedure
Step 1 Connect a leather hose, pressure gauge, reducing valve, and nitrogen cylinder to the
equipment. Ensure that the pressure gauge and reducing valve are closed.
If no low-temperature component is installed on the outdoor side, connect pipes as
shown in Figure 3-36, and charge nitrogen into the system from the low-pressure and
exhaust pipe needle valves simultaneously.
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