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LG Multi F Series Installation Manual page 58

Outdoor unit
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INSULATION
Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene (EPDM)
Insulation Wall Thickness Requirements
Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfunction due to extreme temperature
fluctuations.
• Always properly insulate the piping. Insufficient insulation will result in condensation, reduced heating/cooling performance, etc. Also, if the
pipes aren't insulated properly, condensation could potentially cause damage to building finishes. Pay special attention to insulating the
pipes installed in the ceiling plenum.
• Fully insulate the piping connections.
• Follow local codes and the designer's instructions when selecting ethylene propylene diene methylene (EPDM) insulation wall thickness.
Table 31: Minimum Refrigerant Pipe EPDM Insulation Wall Thickness Requirements.
ø1/4 inch
Liquid pipe
ø3/8 inch
ø3/8 inch
ø1/2 inch
ø5/8 inch
ø3/4 inch
ø7/8 inch
Vapor pipe
ø1 inch
ø1-1/8 inches
ø1-1/4 inches
ø1-3/8 inches
ø1-1/2 inches
ø1-3/4 inches
The thickness of the above insulation material is based on heat conductivity of 0.61 Btu/in/h/ft
1
1. Typical Conditioned Location
2. Special Conditioned Location
1. When the location is air conditioned, but there is severe temperature/humidity difference due to high ceilings.
• Church, auditorium, theater, lobby, etc.
2. When the location is air conditioned, but internal temperature/humidity are high.
• Bathroom, swimming pool, locker room, etc.
3. Typical Unconditioned Location
An unconditioned space inside a building.
4. Special Unconditioned Location: If conditions 1 and 2 below are present.
1. An unconditioned space or plenum of a building.
2. An area where there is an elevated humidity level.
5. Additional Insulation for Indoor Units Will be Required in Humid Environments.
The air conditioner factory insulation has been tested according to "ISO Conditions with Mist," and it satisfies the requirements. If the system
58
Air-conditioned location
1. Typical Conditioned
2. Special Conditioned
Location
>1/2 inch
>1/2 inch
>1/2 inch
>3/4 inch
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.
1
3. Typical Unconditioned
Location
Location
>1/2 inch
>1/2 inch
>1/2 inch
>1/2 inch
>3/4 inch
>3/4 inch
>1 inch
>1 inch
2
MULTI
MULTI
Non-air conditioned location
4. Special Unconditioned
Location
>1/2 inch
>1/2 inch
>1 inch
F
F
MAX

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