Huawei NetCol8000-A Series User Manual page 87

NetCol8000-A(050, 100) In-room Air Cooled Smart
Cooling Product
User Manual
Procedure
Step 1 Switch off the circuit breakers of components except the transformer, and switch on the
general power circuit breaker.
Step 2 Check whether the low-temperature component is installed on the outdoor side.

(1) Low pressure needle valve
(3) Low pressure gauge
(5) Vacuum pump

Issue 10 (2019-01-15)
The NetCol8000-A100 has dual systems, so the other cooling system also needs to be vacuumized.
You can enter the diagnostic mode only when the system is turned on.
If no low-temperature component is installed on the outdoor side, vacuumizing the
cooling system from the high pressure needle valve and low pressure needle valve at the
same time.
Figure 4-1 Vacuumizing the single cooling system without configuring low-temperature
component
If low-temperature component is installed on the outdoor side, vacuumizing the cooling
system from the high pressure needle valve, low pressure needle valve, and liquid pipe
needle valve at the same time.
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4 Power-On Commissioning
(2) High pressure needle valve
(4) High pressure gauge
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