Thermal Insulation Of Refrigerant Piping - LG ARUN115DT2 Installation Manual

Refrigerant piping installation

Thermal 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.
A
Heat insulation material
B
Pipe
C
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.
Wrong
method
Correct
method
Penetrations
Inner wall (concealed)
A
B
Floor (fireproofing)
D
F
G
B
46 46 Outdoor Unit Outdoor Unit
B A C
A
A
B
C
C
D
E
D
F
E
C
Power lines
D
D
A
B
E
Liquid pipe
A
Gas pipe
B
C Power lines
D Insulating material
E Transmission lines
Outer wall
D
C
B
A
Roof pipe shaft
G
D
B
H
Heat
Adhesive + Heat - resistant polyethylene foam +
insulation
Adhesive tape
material
Indoor
Outer
Floor exposed Water-proof hemp cloth + Bronze asphalt
covering
Outdoor
Note:
When using polyethylene cover as covering material, asphalt roof-
ing will not be required.
• Be sure to fully insulate connecting portion.
Liquid pipe
Gas pipe
Power lines
Finishing tape
Insulating material
Transmission lines
Transmission lines
Separation
Outer wall (exposed)
E
B
I
Penetrating portion on fire
limit and boundary wall
I
J
A
1m 1m
(3.3ft) (3.3ft)
Vinyl tape
Water-proof hemp cloth + Zinc plate + Oily paint
A
A
These parts are not insulated.
Sleeve
Heat insulating material
Lagging
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
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.)