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Maintenance
E02A INTEGRATED RACK TYPE AIR CONDITIONER
UM.ICUBE2.0-IRTAC.SG.0822 August 2022 www.eaton.com
Figure 5.3
Connect to the vacuum pump
(1) Low pressure gauge
(4) Low pressure valve
(2) High pressure gauge
(5) Sight window
(3) Zero adjustment screw
(6) High pressure valve
(7) Low pressure side interface
(8) High pressure side interface
(9) Vacuum pump or refrigerant interface
Step 2
Use a vacuum pump to vacuum the refrigeration system.
After confirming that the pipeline connection is completed, turn on the vacuum pump to start vacuuming. The
vacuum degree of the system is required to be below
35Pa
.
Figure 5.4
Power on the vacuum pump
Step 3
Maintain pressure on the system.
After the vacuum is completed, power off the vacuum pump, close all the pressure gauges and tighten the
connection between the pressure gauge and the vacuum pump. Keep the pressure of the system for 20-30
minutes and observe whether the pointer of the pressure gauge is moving. If the value of the pressure gauge
needle remains unchanged (maintained at -0.1MPa) that confirms that the system is well sealed and can be filled
with refrigerant.
Step 4
Refrigerant charge.
After the system pressure is maintained, remove the vacuum pump from the pipeline, and connect the pipeline to
the refrigerant tank to charge the refrigerant.
1. Move the gas pipe connecting the vacuum pump to the refrigerant tank and tighten it, then loosen the
connection of the middle pipe of the pressure gauge by 4-5 turns.
2. Turn on the switch of the refrigerant tank, let the gas pour into the pipe and rush out from the connection. The
process lasts for about 10 seconds, and then tighten the pressure gauge connection so that the air in the pipe
is discharged to the outside.
3. After exhausting the air from the pipeline, the refrigerant charge is started. Please turn the refrigerant
tank upside down when charging, and you must use an electronic scale to ensure the quality of the
refrigerant charged.
4. After the refrigerant charging is completed, close the valve on the low pressure port side of the pressure
gauge, do not remove the pipeline connection for the time being, and perform the power-on operation and
refrigeration operation.
