Installation Manual
13
The indoor unit installation
ENGLISH
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.
Ⓐ
Heat insulation material
Ⓑ
Pipe
Ⓒ
Outer covering(Wind the connection part
and cutting part of heat insulation material
with a finishing tape.)
Heat insulation
material
Ad Heat - resistant
polyethylene foam + Adhesive tape
Outer
covering
Indoor
Vinyl tape
Floor
exposed
Water-proof hemp cloth +
Bronze asphalt
Outdoor
Water-proof hemp cloth +
Zinc plate + Oily paint
Bad
example
• Do not insulate gas or low pressure pipe and liquid or high
pressurepipe together.
Liquid pipe
Gas pipe
Power cables
Finishing tape
Insulating material
Communication cables
• Be sure to fully insulate connecting portion.
These parts are not insulated.
Good
example
Liquid pipe
Communication cables
Communication cables
Separ
-ation
Gas pipe
Power cables
Insulating material
Power cables
Thermal insulation of refrigerant piping
Note :
When using polyethylene cover as
covering material, asphalt roofing shall not
be required.
Note :
Recommended Insulation material
Material : EPDM
Thickness : 15 mm(Gas pipe) and 19 mm(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 15 mm(Gas pipe) and
19 mm(Liquid pipe) or over.
CAUTION
!
