LG LS243HLV Installation Manual page 53

Deep Evacuation Procedure, continued.
3.
4.
tem may contain moisture; therefore, it will be necessary to repeat the steps of vacuum break
and drying.
5. After maintaining the system in vacuum for two (2) hours, check if the vacuum gauge rises or
not. If it doesn't rise, then the system is properly evacuated.
6. Close manifold gauges.
Triple Evacuation Procedure
After the leak / pressure check is complete, it is a best practices recommendation that a triple
evacuation procedure is performed to the refrigerant piping and the connected indoor unit. Triple
evacuation must be performed through the gas (vapor) suction Schrader port on the outdoor unit
service port.
The deep evacuation procedure is required for Single Zone systems. The triple evacuation procedure is
a best practices recommendation for Single Zone systems.
before operating the system.
• Evacuate through just the gas (vapor) suction Schrader port on the outdoor unit service port.
• The outdoor unit service valves must remain closed and the stem head access caps tight.
and release the factory refrigerant charge until trim charge is complete, and the system is ready to operate.
• Any field-installed ball valves in the refrigerant system (if used) must be open to ensure all piping is free and clear for evacuation on all
piping and connected indoor unit.
• Never perform evacuation using refrigerant.
•
•
• Subsequent oil changes will be necessary after several hours of continuous operation; have extra oil on hand.
• Use a quality micron gauge in good operating order and install as far away from pump as possible.
FINAL INSTALLATION PROCEDURES
Deep Evacuation and Triple Evacuation Tests
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 81: Evacuation Procedure Diagram.
Indoor Unit
-
Outdoor Unit
Refrigerant
Piping
Connected to
Shrader Valve on
Gas (Vapor) Service
Gauge Manifold
Port
Lo Hi
Open
Micron
Close
Gauge
Vacuum Hose
Vacuum Pump
Do not open the outdoor unit service valves
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