Huawei NetCol8000-A013 User Manual page 72

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (600 mm Width)
Step 6 After making sure that the pressure gauge has no obvious increase, open the stop
valves for the gas pipe and liquid pipe of the outdoor unit.
● After the outdoor unit stop valve is opened, the refrigerant in the outdoor unit
flows to the engineering pipe and indoor unit pipe. When performing other
operations, be careful to prevent refrigerant from spraying out.
● After the vacuumization and before removing the rubber hose, ensure that
there is positive pressure inside the refrigerant pipe of the indoor unit. For
detailed operations, see step 1–3 in section "Commissioning Components".
Step 7 Remove the hose, pressure gauge, and vacuum pump.
Step 8 Install needle valve nut and rear cover nut of indoor unit and outdoor unit.
Step 9 Wrap the gas pipe stop valve with stop valve sponge.
Figure 3-40 Wrapping the gas pipe stop valve
(1) Stop valve sponge
Step 10 Wrap the gas liquid stop valve with stop valve sponge by referring to
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Issue 04 (2022-11-25)
NO TE
If the pressure gauge cannot display 60 Pa (absolute pressure), perform vacuum pumping
so that the pressure gauge stays at the smallest scale and preserve the pressure for 1 hour.
Then, check whether the pressure displayed on the gauge has an obvious increase.
CA UTION
(2) Liquid pipe stop
valve
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3 System Installation
(3) Gas pipe stop valve (4) Cable ties
Step 9.
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