Huawei NetCol5000-A050 User Manual page 136

NetCol5000-A050 In-row Air Cooled Smart Cooling
Product
User Manual
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 the pressure gauge valves and refrigerant cylinder valve shown in
to charge refrigerant.
● Do not move the pipe or steel vessel when charging refrigerant. Otherwise, the
value on the electronic scale is influenced.
● When charging refrigerant for a cooling system without a low temperature
component, open only the low-pressure gauge valve. Charge 1 kg of refrigerant
from the low pressure side, and then close the low-pressure gauge valve. Then,
open the high-pressure gauge valve and charge the remaining refrigerant from
the exhaust pipe needle valve.
● When charging refrigerant for a cooling system with a low temperature
component, open only the low-pressure valve of gauge 1 and gauge 2. Charge
1 kg of refrigerant from the low pressure side, and then close the low-pressure
valve of gauge 1. Then, open the high-pressure valves of gauge 1 and gauge 2.
Charge the remaining refrigerant from the exhaust pipe needle valve and liquid
pipe needle valve.
Step 5 The amount of refrigerant precharged must be more than half of the total charge
amount calculated and less than the total charge amount. If refrigerant is not
charged to the total amount in the precharging process, charge the remaining
amount of refrigerant during power-on commissioning. For details about
commissioning, see
Step 6 After the refrigerant is charged, close all pressure gauge valves and the refrigerant
cylinder valve.
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Issue 08 (2021-09-17)
NO TICE
NO TICE
6.7 Charging the Remaining
NO TE
Tighten the needle valve bonnets when the charge is complete. Check whether a needle
valve leaks by applying soap bubbles to the valve vent or using a halogen leak detector. If
the valve leaks, contact Huawei technical support.
Copyright © Huawei Technologies Co., Ltd.
6 Power-On Commissioning
Refrigerant.
Figure 6-4
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