Connecting Cables; Precautions - Huawei NetCol8000-E220 User Manual

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
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 the pressure gauge valves and refrigerant cylinder valve shown in
3-31
Do not move the pipe or steel vessel when charging refrigerant. Otherwise, the
value on the electronic scale is influenced.
Step 5 The amount of refrigerant precharged is 4 kg to 8 kg for each system. If
refrigerant is not charged to the total amount in the precharging process, charge
the remaining amount of refrigerant during power-on commissioning.
Step 6 After refrigerant charging, close pressure gauge valves and the refrigerant steel
vessel valve.
----End

3.12 Connecting Cables

3.12.1 Precautions

●
●
Issue 06 (2020-08-19)
NO TICE
to charge refrigerant.
NO TICE
NO TE
After the injection is completed, tighten the needle valve bonnet, and check whether the
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.
All power cables and ground cables comply with local country standards.
Check the operating current of the NetCol8000 according to the NetCol8000
nameplate or the electrical diagram provided with the NetCol8000. Determine
that the cables and circuit breakers are sufficient to handle the case in which
loads are affected after the NetCol8000 stops generate cooling for the loads.
The power supply of the NetCol8000 is consistent with the voltage, phase
quantity, and frequency on the NetCol8000 nameplate. The NetCol8000
operating voltage cannot exceed the rated value ±10%, and the inter-phase
imbalance voltage cannot exceed 2%.
Copyright © Huawei Technologies Co., Ltd.
3 Installation Guide
Figure
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