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
between indoor unit and insulating material, and insulating materials themselves. When insula-
tion work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to
insulation 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
Good example
A
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
Outer
exposed
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.
•
PIPE CONNECTION
25
Vinyl tape
Water-proof hemp cloth +
Bronze asphalt
Zinc plate + Oily paint