Thermal Insulation Of Refrigerant Pipe - LG UU70W Installation Manual

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
22

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.
Ⓐ Heat insulation material
Ⓑ Pipe
Ⓒ Outer covering(Wind the connection part
and cutting part of heat insulation material
with a finishing tape.)
B
Liquid pipe
A
Good example
Gas pipe
B
C Power wiring cable
Insulating material
D
Communication wiring cable
E
Do not insulate gas or low pressure pipe and liquid or high
•
pressure pipe together.
! CAUTION
Cutting line of insulation must look upper direction. Thickness of insulation is 15mm(Gas
pipe) and 19mm(Liquid pipe) or over.
!
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
Thermal conductivity : less than 0.03(kcal/m.hr.°C)
Communication
Power wiring
C
cable
D
D
A
E
Separation
2
)
Heat insulation Adhesive + Heat - resistant poly-
material ethylene foam + Adhesive tape
Indoor
Floor ex-
Outer
posed
covering
Outdoor Water-proof hemp cloth +
!
NOTE
When using polyethylene cover as cover-
ing material, asphalt roofing shall not be
required.
wiring cable
Be sure to fully insulate connecting portion.
•
Vinyl tape
Water-proof hemp cloth +
Bronze asphalt
Zinc plate + Oily paint