Huawei NetCol8000-A013 User Manual page 59

NetCol8000-A013 In-room Air Cooled Smart Cooling
Product
User Manual (600 mm Width)
Figure 3-23 Support positions for refrigerant pipes
Step 2 Connect the outdoor unit stop valves.
● Connect the liquid pipe stop valve first, and then the gas pipe stop valve.
● The outdoor unit has been filled with 5 kg R410A refrigerant before delivery.
During welding, do not open the plugs of the outdoor unit stop valves and
needle valves. Otherwise, refrigerant will leak.
1.
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Issue 04 (2022-11-25)
NO TE
Onsite personnel are responsible for preparing the required materials and installing the
pipe supports.
NO TICE
Weld the adapter and the straight section of the engineering pipe outside the
cabinet.
Remove the pipe nut from the liquid pipe stop valve and gas pipe stop valve
using an adjustable wrench. Check that the PTFE washer on the stop valve
and the inner protruding surface of the active connector nut are free of
impurities and scratches.
Clean up impurities using alcohol or a wet cloth. If there is any scratch,
contact the technical support for replacement.
Keep the adapter nut and the stop valve screw thread on the same center
line. Secure the adapter to the stop valve with the other hand and tighten the
nut using a torque wrench.
NO TICE
– Tighten the liquid pipe stop valve using a 27# torque wrench to a torque
of 35-37 N·m. Tighten the gas pipe stop valve using a 36# torque wrench
to a torque of 50-52 N·m.
– When tightening a stop valve using a torque wrench, secure the hex nut of
the active connector at the welded copper pipe to prevent the copper pipe
from turning and further deforming as the stop valve is being tightened.
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