Figure 3-32 Downflow
Step 4 Then, check that the pressure reading on the pressure gauge remains unchanged.
----End
Follow-up Procedure
●
If the pressure decreases, apply soapy water on the pipes, especially pipe
joints to check for any leakage.
●
If the pressure preservation is good, wrap all pipes and connectors with
thermal insulation foam, and mount bonnets on the needle valves.
3.5.7 Leakage Test with Water
Context
●
To avoid blockage of the heat exchanger in the smart cooling product due to
foreign matter from the main pipe during the construction, you are advised to
clean the main pipe before water is supplied to the smart cooling product.
Turn off the isolation valves on the water inlet and outlet pipes before the
cleaning and turn them on afterwards.
●
If a cabinet has been disassembled, check that hold hoops on the pipe
connectors do not leak. If there is no water leakage, wrap the hold hoops with
thermal insulation foam.
●
Open the exhaust valve of each heat exchanger to exhaust nitrogen onsite.
●
Ensure that the indoor temperature is always above 0°C during the leakage
test with water, otherwise, the pipes may experience frost cracks. If the indoor
temperature is below 0°C, take anti-freezing measures for the pipes.
Procedure
Step 1 Open the general water supply valve.
Step 2 Verify that the chilled water valve is open (100%). If not, press the button on the
side of the actuator, and manually rotate the valve handle to the maximum.
NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
3 Installation
Issue 07 (2021-12-30)
Copyright © Huawei Technologies Co., Ltd.
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