LG ARUN50LH2A Installation Manual page 37

Thermal Insulation of Refrigerant Piping
Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with
enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and
insulating material, and insulating materials themselves. When insulation work is insufficient, there is a
possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.
B
A
Heat insulation material
B
Pipe
C
Outer coveringZ
(Wind the connection part and cutting part of
heat insulation material with a finishing tape.)
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
A
Bad example
B
Good example
A
B
C
D
E
Penetrations
Inner wall (concealed)
A
B
Floor (fireproofing)
D
Z
F
Z
G
B
A C
Note:
When using polyethylene cover as covering material, asphalt roof-
ing shall not be required.
Liquid pipe
A
B Gas pipe
C Power lines
C
D Finishing tape
E Insulating material
D
Communication lines
F
E
C
Power lines
D
D
A
E
Liquid pipe
Gas pipe
Power lines
Insulating material
Communication lines
Outer wall Outer wall (exposed)
D
C
B
A
Penetrating portion on fire >
limit and boundary wall
Roof pipe shaft
G
D
B
H
Heat
Adhesive + Heat - resistant polyethylene foam +
insulation
Adhesive tape
material
Indoor
Outer
Floor exposed Water-proof hemp cloth + Bronze asphalt
covering
Outdoor
• Be sure to fully insulate connecting portion.
Communication lines
Separation
E
B
I
I
J
A
1m 1m
Refrigerant Piping
Vinyl tape
Water-proof hemp cloth + Zinc plate + Oily paint
A
A These parts are not insulated.
SleeveZ
Z
Heat insulating materialZ
LaggingZ
Caulking materialZ
BandZ
Waterproofing layerZ
Sleeve with edgeZ
Lagging materialZ
Mortar or other incombustible caulkingZ
Incombustible heat insulation material
When filling a gap with mortar, cover the
penetration part with steel plate so that
the insulation material will not be caved in.
For this part, use incombustible materials
for both insulation and covering.(Vinyl
covering should not be used.)
Installation Manual 37