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Installation
Due to our policy of continuous product innovation, some specications may change without notication.
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Always properly insulate the piping. Insufcient 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 nishes. Pay special attention to insulating the pipes installed
in the ceiling plenum.
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.
Follow locals codes and the designer’s instructions when selecting EPDM insulation wall thickness.
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 47: 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.
REFRIGERANT PIPING DESIGN
Insulating the Refrigerant Piping
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