Exhausting Nitrogen - Huawei NetCol8000-C070 User Manual

NetCol8000-C(070, 130, 190) In-room Chilled Water
Smart Cooling Product
User Manual
Figure 3-11 Downflow needle valve
(1) Exhaust valve
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Follow-up Procedure
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3.4.2 Exhausting Nitrogen

Prerequisites
● Before exhausting nitrogen, check whether the cooling system has good air
tightness. (Remove the bonnet from the needle valve and press the valve plug
to check whether there is a sound of air flow.)
● Open the exhaust valve of each heat exchanger to exhaust nitrogen onsite.
Issue 02 (2020-08-30)
Remove the desiccant bag under the heat exchanger of the upflow unit.
Remove the fan maintenance baffle plate of the downflow unit, and take out
the desiccant bag inside the cabinet.
Check that thermal insulation foam is in close contact with the pipes, there is
no crack in each cutting position, and the chilled water valve is tightly
wrapped by thermal insulation foam.
NO TICE
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(2) Drainage valve
3 Installation Guide
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