LG ARUB115BT2 Installation Manual - Page 40

Thermal insulation of refrigerant piping

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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 AC A Heat insulation material B Pipe C Outer covering (Wind the connection part and cutting part of heat insulation material with a finishing tape.) Heat insulation material Outer covering Glass fiber 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 Note: When using polyethylene cover as covering material, asphalt roofing shall not be required. Bad example • Do not insulate gas or low pressure pipe and liquid or high pressure pipe together. B A Liquid pipe A F B Gas pipe C Power lines C D Finishing tape E Insulating material D F Transmission lines E • Be sure to fully insulate connecting portion. A A These parts are not insulated. C E Power lines Transmission lines E Good example B A D A Liquid pipe E F G B Low pressure gas pipe C Power lines D Finishing tape E Insulating material F High pressure gas pipe G Transmission lines Separation Penetrations Inner wall (concealed) C AB Outer wall Outer wall (exposed) D AB E B Floor (fireproofing) D F G B I Roof pipe shaft G D B Penetrating portion on fire limit and boundary wall I J H A 1m 1m Sleeve Heat insulating material Lagging Caulking material Band Waterproofing layer Sleeve with edge Lagging material Mortar or other incombustible caulking 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.) 40 Outdoor Unit

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40
Outdoor Unit
40
Outdoor Unit
Refrigerant piping installation
Thermal insulation of refrigerant piping
Heat
insulation
material
Outer
covering
Glass fiber
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
Note:
When using polyethylene cover as covering material, asphalt roof-
ing shall not be required.
•
Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
•
Be sure to fully insulate connecting portion.
Liquid pipe
Gas pipe
Power lines
Finishing tape
Insulating material
Bad example
Good example
These parts are not insulated.
B
A
C
A
B
C
A
C
D
E
A
B
C
D
E
Transmission lines
F
Liquid pipe
High pressure gas pipe
Transmission lines
Transmission lines
Separation
Low pressure gas pipe
Power lines
Finishing tape
Insulating material
A
B
C
D
E
F
G
A
A
B
F
Heat insulation material
Pipe
Outer covering
(Wind the connection part and cutting part of
heat insulation material with a finishing tape.)
D
G
E
E
B
A
E
F
C
Power lines
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.
1m
1m
A
B
D
F
G
B
G
D
B
H
I
J
A
E
B
I
A
B
D
C
Inner wall (concealed)
Floor (fireproofing)
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
Outer wall
Outer wall (exposed)
Penetrations
Sleeve
Heat insulating material
Lagging
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
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.)