Huawei NetCol8000-E220 User Manual page 220

NetCol8000-E220 Modular Indirect Evaporative
Cooling System
User Manual
Context
Components and working principle: The scroll compressor is composed of the air
intake and exhaust angle valves, oil pump, motor, and electric heating belt. Air is
sucked from the outside and exhausted from the position in the center. A variable-
frequency scroll compressor uses a frequency converter, and generates different air
volumes as the frequency changes, thereby increasing or reducing the cooling and
heating capacity. When the compressor operates at a high speed, it generates a
large heating or cooling capacity, which enables the room temperature to quickly
reach the preset temperature. When the room temperature decreases to a value
close to the preset temperature, the compressor frequency automatically
decreases to a certain level to meet the heating or cooling capacity requirements
and maintain the room temperature at a stable level.
Reclaim or dispose of the refrigerant in accordance with local laws and
regulations. Do not discharge the refrigerant to the atmosphere.
● Do not tilt the compressor during replacement to prevent lubricant leakage.
● When replacing a compressor, avoid skin contact with the refrigerant or
lubricant to prevent frostbite or burns.
● Install a new compressor immediately after you remove the rubber plugs of the
suction inlet and exhaust outlet to prevent the moisture.
Procedure
Step 1 On the controller home screen, tap Shutdown, and turn off the device switch in
the PDC.
Exercise caution because the device is still energized after it is shut down on the
controller home screen.
Step 2 Open the no.2nd maintenance door.
Step 3 Reclaim the refrigerant.
Step 4 Remove the electric heating belt and compressor ground cable.
Step 5 Remove the cover of the connection box and disconnect the compressor power
cables.
Step 6 Removing the electric heating belt and compressor power cables
Step 7 Remove the compressor.
1.
Issue 06 (2020-08-19)
NO TICE
NO TICE
Heat the air intake angle valve joints using a heat gun for 10 minutes. Secure
the angle nut and pipe nut on the air intake side, as shown by (1) in Figure
Removing a compressor angle valve, using two 30# adjustable wrenches
respectively. Then loosen the adjustable nut using a 36# adjustable wrench to
separate the pipe from the angle valve.
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6 System Operation and Maintenance
211