Huawei NetCol8000-A045D User Manual page 177

NetCol8000-A(045, 055, 060, 090, 120) In-room Air
Cooled Smart Cooling Product
User Manual
Figure 6-16 NetCol8000-A060 precharging refrigerant into the system with a low-
temperature component (upflow)
(1) Refrigerant cylinder (2) Electronic scale
(5) Connection nut
Step 2 Slightly open the refrigerant cylinder valve and loosen the connection nut of the
pressure gauge. Tighten the nut when cold air escapes out of the nut.
Step 3 Put the refrigerant cylinder upside down on the electronic scale. Clear the reading
on the balance.
If the R410A refrigerant is provided by Huawei, put the refrigerant steel vessel
upside down when charging in the refrigerant. If the refrigerant is not provided by
Huawei, check with the refrigerant provider whether the steel vessel has a siphon.
If the vessel has a siphon, do not put it upside down when charging refrigerant. If
the vessel has no siphon, put it upside down when charging refrigerant. These
measures ensure that the refrigerant is charged in the liquid form.
Step 4 Open all pressure gauge valves and the refrigerant cylinder valve to charge
refrigerant.
Issue 05 (2020-10-10)
(6) Low-pressure
needle valve
NO TICE
Copyright © Huawei Technologies Co., Ltd.
6 Power-On Commissioning
(3) Pressure gauge 1 (4) Pressure gauge 2
(7) Exhaust pipe (8) Liquid pipe needle
needle valve valve
167