Wall Mounted Installation Manual

38
Multi F Standard Wall-Mounted Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
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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
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 EPDM insulation that is plenum-rated with a heat-resistance factor of more than 248°F.
Installing Refrigerant Piping Insulation
WARNIN
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Ensure all refrigerant piping is insulated. Exposed refrigerant piping will cause burns if touched.
Wrap all refrigerant and condensate piping including field-provided isolation ball valves and flexible pipe connection kits provided by LG.
All pipes must be insulated and each pipe must be separately wrapped. Any exposed piping will generate condensate or will cause burns if
touched. Sufficiently insulate all cold surfaces to prevent moisture forming.
Ensure insulation material fits snugly against the refrigeration pipe with no air space between the pipe surface and the surrounding insulation.
Protect insulation inside hangers and supports with a second insulation
layer. Ensure insulation on all pipe passing through pipe hangers, inside
conduit, and/or sleeves is not compressed.
Glue all insulation joints with no air gaps between insulation segments,
and between insulation segments and the unit case. Ensure insulation
material fits snugly against the refrigeration pipe with no air space be-
tween it and the pipe. All pipe insulation exposed to the sun and outdoor
elements must be properly protected with PVC, aluminum vapor barrier,
or alternatively placed in a weather-resistant enclosure such as a pipe
rack with a top cover; and must meet local codes. Pay special attention
to insulating the pipes installed in a ceiling plenum.
Figure 54: Typical Refrigerant Line Flare Fitting Insulation Detail
No Clearance
Overlap Insulation Where the
Port and the Piping Meet
Insulation for Indoor Unit Port
(Field Supplied)
Insulation for Refrigerant
Piping (Field Supplied)
Insulation Clip (Field Supplied)
Bands
Insulation
1.
Figure 55: Insulating the Piping.
INSTALLATION
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• 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.
3. Typical Unconditioned Location
When piping passes through an indoor area where the indoor unit does not operate, such as a hallway, dormitory, or school, etc. An uncondi-
tioned space inside a building.