Best Practices for LG HVAC System Installation
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Best Practices for LG HVAC System Installation
Due to our policy of continuous product innovation, some specications may change without notication.
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• 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.
• Follow locals codes and the designer’s instructions when selecting EPDM insulation wall thickness.
1� Typical Conditioned Location
A building plenum or space that contains conditioned air that does not exceed 80°F DB.
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.
Classication / Piping O.D.
Air-conditioned location Non-air conditioned location
1. Typical Conditioned
Location
2. Special Conditioned
Location
3. Typical Unconditioned
Location
4. Special Unconditioned
Location
Liquid pipe
ø1/4 inches
>1/2 inches >1/2 inches >1/2 inches >1/2 inches
ø3/8 inches
≥ø1/2 inches >1/2 inches >1/2 inches >1/2 inches >1/2 inches
Vapor pipe
ø3/8 inches
>1/2 inches
>3/4 inches >3/4 inches
>1 inch
ø1/2 inches
ø5/8 inches
ø3/4 inches
ø7/8 inches
ø1 inch
ø1-1/8 inches
>3/4 inches
ø1-1/4 inches
>1 inch >1 inch
ø1-3/8 inches
ø1-1/2 inches
ø1-3/4 inches
Table 7: Minimum Refrigerant Pipe EPDM Insulation Wall Thickness Requirements.
1
1
The thickness of the above insulation material is based on heat conductivity of 0.61 Btu/in/h/ft
2
/°F.
5� Additional Insulation for Indoor Units May 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
has been operating for a long time in a high humidity environment (dew point temperature: more than 73°F), condensate is likely to form. If
this happens, install 3/8 inch thick ethylene propylene diene methylene (EPDM) insulation that is plenum-rated with a heat-resistance factor
of more than 248°F.
INSULATION