Heat Insulation Of Refrigerant Piping - LG MULTI V JRUN120LTE5 Installation Manual

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
50

Heat 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.
Heat insulation material
Pipe
Outer covering(Wind the connection part
and cutting part of heat insulation material
with a finishing tape.)
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
Bad
example
Good
example
Liquid pipe
Gas pipe Insulating material
Communication cables
Power cables
Penetrations
Inner wall (concealed) Outer wall
D
C
A
B
Penetrating portion on fire
Floor (fireproofing)
limit and boundary wall
D
F
G
B
Heat insulation
Liquid pipe
Gas pipe
Power cables
Finishing tape
Insulating material
Communication cables
Power cables Communication cables
Separation
Outer wall (exposed)
E
B
A
I
Roof pipe shaft
I
G
D
B
H
A
F
1m 1m
Adhesive + Heat - resistant
material polyethylene foam + Adhesive tape
Indoor
Floor Water-proof hemp cloth +
Outer
exposed
covering
Water-proof hemp cloth +
Outdoor
Zinc plate + Oily paint
NOTE
When using polyethylene cover as
covering material, asphalt roofing shall
not be required.
• Be sure to fully insulate connecting portion.
These parts are not insulated.
Sleeve
Heat insulating material
Lagging
B
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
J
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.)
Vinyl tape
Bronze asphalt