NetCol5000-A(025, 035) In-row Air Cooled Smart
Cooling Product
User Manual (600 mm)
Copyright © Huawei Technologies Co., Ltd.
3. If possible, check that the subcooling degree is within the range of 4–6°C, and check that
there are no bubbles in the refrigerant seen from the sight glass. Recharge or discharge
refrigerant if necessary.
Discharge refrigerant from the discharge pipe needle valve.
4. After twenty minutes, check that the oil level is stably above 1/3 of the oil sight glass and
that no impurity or muddy, as shown in Figure 5-6.
Figure 5-6 Oil level
Step 6 Adjust the humidifier and condensate pump.
During initial commissioning, gently open the front valve and empty air out of the water
inlet pipe. Otherwise, water may spout out of the top of the humidifier cylinder.
Before enabling humidification, turn on the humidifier switch QF5 and flip the drainage
switch to O: Normal humidifying. Otherwise, water will not be injected into the
humidifier cylinder.
Do not turn off the humidifier switch QF5 when the humidifier is running. Otherwise, the
humidifier neither works nor generates alarms. To rectify the fault, disconnect the power
supply to the entire system and then power it on.
1. After the humidifier is started, the water supply solenoid valve leads to a higher liquid
level in the humidifier cylinder. Water supply is smooth and the water pipe is free from
leakage. After 10 minutes, the water inside the humidifier cylinder is with bubbles or
boils. (The water boiling time is relevant with water supply electrical conductivity. The
lower the electrical conductivity, the longer it takes the water to boil.)
2. Press the humidifier manual drainage switch on the electric control box side panel, and
ensure that the water drainage solenoid valve generates a bang. The water level in the
humidifier cylinder decreases. Water is drained smoothly, and the pipe is free from
leakage.
3. Switch the plug screw, as shown in Figure 5-7, until water flows out of the plug screw.
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