● Never move the hose or steel cylinder during refrigerant charging. Otherwise,
the value on the electric balance is inuenced.
● When charging refrigerant for a cooling system without a low-temperature
component, open only the low-pressure gauge valve. Charge less than 1 kg of
refrigerant from the low pressure side, and then close the low-pressure gauge
valve. Open the high-pressure gauge valve and charge the remaining
refrigerant from the discharge pipe needle valve on the high pressure side.
Step 6 Refrigerant to be precharged should be between half of the total calculated
amount and the total calculated amount. If the total amount is not reached after
refrigerant precharging, charge the remaining refrigerant when commissioning the
system, as described in 4.4.4 Commissioning Procedure.
Step 7 Close valves of the pressure gauges and refrigerant steel cylinder after charging
refrigerant.
After the charging is complete, 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.
----End
4.2 Preparing for Power-On
Procedure
Step 1 Verify that the humidier water inlet pipe and drainpipe are correctly connected,
and that the thermal insulation foam is intact. Then connect refrigerant pipes and
precharge refrigerant.
Ensure that there is no reverse or open phase for the input power cable of the
smart cooling product. Otherwise, the smart cooling product may be damaged
beyond repair.
Step 2 Verify that the L1, L2, L3, N, and PE cables are connected to the indoor and
outdoor units in correct phase sequence.
Step 3 Verify that switch QF3 that controls the outdoor unit and compressor as well as
switch QF4 that controls the heater and
humidier are ON.
Step 4 Verify that fan switches Fan1 to Fan6 are ON.
Step 5 For the single power supply scenario, verify that the phase sequence is correct. For
the dual power supply scenario, verify that the phase sequence is correct, and that
MD1 and MD2 are ON.
NetCol5000-A025 In-row Air Cooled Smart Cooling
Product
User Manual (300 mm Width) 4 Power-On Commissioning
Issue 15 (2020-12-10) Copyright © Huawei Technologies Co., Ltd. 106
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