LG UU70W - Thermal Insulation of Refrigerant Pipe

22
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
•
Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
• Be sure to fully insulate connecting portion.
Good example
Liquid pipe
Communication wiring cable
Communication
wiring cable
Separation
Gas pipe
Power wiring cable
Insulating material
A
B
C
D
E
Power wiring
cable
E
D
D
B
A
C
Ⓐ Heat insulation material
Ⓑ Pipe
Ⓒ Outer covering(Wind the connection part
and cutting part of heat insulation material
with a finishing tape.)
B
A
C
Heat insulation
material
Adhesive + Heat - resistant poly-
ethylene foam + Adhesive tape
Outer
covering
Indoor Vinyl tape
Floor ex-
posed
Water-proof hemp cloth +
Bronze asphalt
Outdoor
Water-proof hemp cloth +
Zinc plate + Oily paint
NOTE
!
When using polyethylene cover as cover-
ing material, asphalt roofing shall not be
required.
NOTE
!
Recommended Insulation material
Material : EPDM
Thickness : 15mm(Gas pipe) and 19mm(Liquid pipe) or over.
Density : less than 0.032 ±0.005(g/cm
2
)
Thermal conductivity : less than 0.03(kcal/m.hr.°C)
Cutting line of insulation must look upper direction. Thickness of insulation is 15mm(Gas
pipe) and 19mm(Liquid pipe) or over.
CAUTION
!
Thermal insulation of refrigerant pipe
Be sure to give insulation work to refrigerant pipe by covering liquid pipe and gas pipe separately
with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint be-
tween 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 insula-
tion work to ceiling plenum.
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