LG LGRED LH188HHV1 Installation Manual page 35

REFRIGERANT SYSTEM ENGINEERING
Pipe Sleeves at Penetrations
LG recommends that all pipe penetrations through walls and floors be properly insulated and routed through an appropriate wall sleeve of
sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve. Use 4"+ curved sheet
metal saddles between the bottom surface of the pipe and the bottom surface of the penetration.
Figure 27: Pipe Sleeve Options.
Diameter of penetrations must be determined by pipe diameter plus the thickness of the insulation.
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