LG Multi V CRUN Series Installation Manual page 32

Refrigerant piping installation
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
Steel wire
Piping
B
Asphaltic oily mastic or asphalt
C
D
Heat insulation material A
E
Outer covering B
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
Bad example
Good example
Penetrations
Inner wall (concealed)
A
B
Floor (fireproofing)
D
F
G
B
32 Outdoor Unit
C
A
D
E Note:
When using polyethylene cover as covering material, asphalt roof-
ing shall not be required.
Liquid pipe
A
A
B Gas pipe
C Electric wire
C
D Finishing tape
Insulating material
E
D
F Transmission cable
E
F
Liquid pipe
E A
E
Gas pipe
B
A
B
C Electric wire
D Finishing tape
D
E Insulating material
C
Transmission cable
F
E
C
A
D
F
B
E
Outer wall Outer wall (exposed)
D
C
B
A
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
G
D
B
H
Glass fiber + Steel wire
Heat
insulation Adhesive + Heat - resistant polyethylene foam +
material A
Adhesive tape
Indoor
Outer
Floor exposed Water-proof hemp cloth + Bronze asphalt
covering B
Outdoor
• Be sure to fully insulate connecting portion.
Liquid pipe
A
Gas pipe
B
C Electric wire
D Finishing rectangular pipe
E Insulating material
F Transmission cable
E
B
I
I
J
When filling a gap with mortar, cover the
penetration part with steel plate so that
the insulation material will not be caved in.
A For this part, use incombustible materials
for both insulation and covering.(Vinyl
1m 1m
covering should not be used.)
Vinyl tape
Water-proof hemp cloth + Zinc plate + Oily paint
A
A These parts are not insulated.
Sleeve
Heat insulating material
Lagging
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material