Thermal Insulation Of Refrigerant Piping; Penetrations - LG Multi V Plus II System Installation Manual

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.
B
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.
A
Bad example
B
Good example
Liquid pipe
A
Gas pipe
B
C Power lines
Insulating material
D
Communication lines
E

Penetrations

Inner wall (concealed)
C
A
B
Floor (fireproofing)
D
F
G
B
A C
Heat
insulation
material
Outer
covering
Note:
When using polyethylene cover as covering material, asphalt roof-
ing shall not be required.
Liquid pipe
A
Gas pipe
B
C Power lines
C D Finishing tape
E Insulating material
D
F Communication lines
E
C
Power lines Communication lines
D
D
A
E
Separation
Outer wall Outer wall (exposed)
D
B
A
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
I
G
D
B
H
Refrigerant piping installation
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor Vinyl tape
Floor exposed Water-proof hemp cloth + Bronze asphalt
Outdoor Water-proof hemp cloth + Zinc plate + Oily paint
• Be sure to fully insulate connecting portion.
A
Sleeve
Heat insulating material
E
Lagging
B
Caulking material
Band
Waterproofing layer
I
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
A
for both insulation and covering.(Vinyl
1m 1m
covering should not be used.)
A These parts are not insulated.
Installation Manual 51