Huawei NetCol5000-A050 User Manual page 149

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual
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Figure 6-2 Vacuumizing the system with a low temperature component
(1) Vacuum pump
(4) Low-pressure needle valve (5) Discharge pipe needle
Step 2 In the beginning, the vacuum pump makes loud noises and exhausts white gas
from the exhaust vent. After 10 minutes, if it still exhausts white gas, observe it
for another 10 minutes because the cooling system may not be sealed properly or
there may be too much residual refrigerant or water in the cooling system.
Step 3 After 20 minutes, the pressure gauge pointer should be in the negative area and
the vacuum pump makes small noise. Close and open the pressure gauge
Issue 13 (2023-08-20)
Figure 6-1 Vacuumizing the system without a low temperature component
(1) Vacuum pump
(3) Low-pressure needle valve
If a low-temperature component is installed on the outdoor side, connect the
pressure gauge and vacuum pump at the low-pressure, exhaust pipe, and
liquid pipe needle valves to vacuumize the system simultaneously, as shown
in Figure 6-2.
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(2) Pressure gauge
(4) Discharge pipe needle valve
(2) Pressure gauge 1
valve
6 Power-On Commissioning
(3) Pressure gauge 2
(6) Liquid pipe needle valve
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