Huawei NetCol8000-A045D User Manual page 173

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Context
● When charging refrigerant, you are advised to use a safety valve to prevent
refrigerant leakage during the removal of the leather hose, which may cause
frostbite.
● Wear antifreeze gloves when performing refrigerant-related operations.
● Charge refrigerant (R410A) right after checking that the cooling system does
not leak and the vacuum level meets the requirements.
Procedure
Step 1 Remove the vacuum pump from the vacuumizing equipment, and replace the
vacuum pump with a refrigerant cylinder, as shown in
Figure 6-9 NetCol8000-A045/A055/A090 precharging refrigerant into the system
without a low-temperature component (downflow)
(1) Refrigerant cylinder
(4) Connection nut
Issue 05 (2020-10-10)
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(2) Electronic scale
(5) Low-pressure needle valve (6) Exhaust pipe needle valve
6 Power-On Commissioning
Figure 6-9 or Figure
(3) Pressure gauge
6-13.
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