Huawei NetCol5000-A User Manual page 95

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Figure 4-4 Precharging refrigerant into the system with a low-temperature component
(1) Refrigerant
cylinder
(5) Connection
nut
Step 2 Slightly open the refrigerant cylinder valve and loosen the connection nut of the pressure
gauge. Tighten the nut when cold air escapes out of the nut.
Step 3 Put the refrigerant cylinder upside down on the electronic scale. Clear the reading on the
balance.
If the R410A refrigerant is provided by Huawei, put the refrigerant steel vessel upside down
when charging in the refrigerant. If the refrigerant is not provided by Huawei, check with the
refrigerant provider whether the steel vessel has a siphon. If the vessel has a siphon, do not
put it upside down when charging refrigerant. If the vessel has no siphon, put it upside down
when charging refrigerant. These measures ensure that the refrigerant is charged in the liquid
form.
Step 4 Open the pressure gauge valves and refrigerant cylinder valve shown in
refrigerant.
Issue 01 (2017-07-27)
(2) Electronic scale
(6) Low-pressure
needle valve
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Copyright © Huawei Technologies Co., Ltd.
(3) Pressure gauge 1
(7) Exhaust pipe
needle valve
Figure 4-4
4 Commissioning
(4) Pressure gauge
2
(8) Liquid pipe
needle valve
to charge
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