LG MULTI V Installation Manual page 53

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 con-
densation drip, etc. Pay special attention to insulation work to ceiling plenum.
B
A
Heat insulation material
B
Pipe
C
Outer covering
(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
Liquid pipe
A
Gas pipe
B
C Power lines
Insulating material
D
Transmission lines
E
Penetrations
Inner wall (concealed)
C
A
B
Floor (fireproofing)
D
F
G
B
Pipe connections between indoor and outdoor unit
A C
Heat
insulation
material
Outer
covering
Note:
When using polyethylene cover as covering material, asphalt roof-
ing shall not be required.
Liquid pipe
A
Gas pipe
B
C Power lines
C
D Finishing tape
E Insulating material
D
F Transmission lines
E
C
Power lines Transmission lines
D
D
A
E
Separation
Outer wall Outer wall (exposed)
D
B
A
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
I
G
D
B
H
1m
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor Vinyl tape
Floor exposed Water-proof hemp cloth + Bronze asphalt
Outdoor Water-proof hemp cloth + Zinc plate + Oily paint
• Be sure to fully insulate connecting portion.
A
Sleeve
Heat insulating material
E
Lagging
B
Caulking material
Band
Waterproofing layer
I
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
J
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
A
for both insulation and covering.(Vinyl
1m
covering should not be used.)
A These parts are not insulated.
Installation Manual 53