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2. Air purging by refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way valves are set to the closed position.
2). Connect the charge set and a charging cylinder to the service port of the 3-way valve.
3). Air purging.
Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the
2-
way valve approximately 45’ for 3 seconds then closing it for 1 minute; repeat 3 times.
After purging the air, use a torque wrench to tighten the flare nut on the 2-way valve.
4). Check the gas leakage.
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the
2-
way valve approximately 45’ until the gauge indicates 0.3 to 0.5 M Pa.
6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open
position.
Be sure to use a hexagonal wrench to operate the valve stems.
7). Mount the valve stems nuts and the service port cap.
8) Be sure to check the gas leakage.
Brush some bubble water at connections which have been connected during installation especially for the
valve connections
Note:
Be sure to use a torque wrench to tighten the service port cap to a torque 18N.m.
Summary of Contents for 38QUS018DS2 Series
Page 16: ...16 78 3 4 A5 Duct ...
Page 19: ...19 78 ...
Page 20: ...20 78 5 Wiring Diagram Outdoor 38QUS018DS2 Outdoor 38QUS027DS3 ...
Page 21: ...21 78 Outdoor 38QUS036DS4 High wall 42QHF009DS 42QHF012DS 42QHF018DS ...
Page 22: ...22 78 A5 Duct 42QSM009DS A5 Duct 42QSM012DS 42QSM018DS ...
Page 23: ...23 78 Four way cassette 42QTD009DS Four way cassette 42QTD012DS 42QTD018DS ...
Page 24: ...24 78 Console ...