Huawei NetCol8000-A045D User Manual page 168

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Procedure
Step 1 Check whether a low-temperature component is installed on the outdoor side.
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Issue 05 (2020-10-10)
If no low-temperature component is installed on the outdoor side, connect
the pressure gauge and vacuum pump at the low-pressure and exhaust pipe
needle valves to vacuumize the system simultaneously, as shown in
6-1.
Figure 6-1 NetCol8000-A045/A055/A090 vacuumizing the system without a
low-temperature component (downflow)
(1) Vacuum pump
(3) Low-pressure needle valve
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6 Power-On Commissioning
(2) Pressure gauge
(4) Exhaust pipe needle valve
Figure
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