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[Fig. 10.3.3]
A Siphon pipe
10.4. Thermal insulation of refrigerant
piping
Be sure to add 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
possibility of condensation drip, etc. Pay special attention to insulation work in
the ceiling plenum.
[Fig. 10.4.1]
C
B
A
D
E
A Steel wire
C Oily mastic asphalt or asphalt
E Outer covering B
Heat
insulation
Adhesive + Heat - resistant polyethylene foam + Adhesive tape
material A
Indoor
Vinyl tape
Outer
Floor exposed Water-proof hemp cloth + Bronze asphalt
covering B
Outdoor
Water-proof hemp cloth + Zinc plate + Oily paint
Note:
shall not be required.
No heat insulation must be provided for electric wires.
[Fig. 10.4.2]
B
E
A
B
C
D
E
A Liquid pipe
B Gas pipe
D Finishing tape
E Insulator
[Fig. 10.4.3]
B Piping
D Heat insulation material A
E
A
D
C Electric wire
A
Penetrations
[Fig. 10.4.4]
A B
E
B
I
G
D
B
H
F
A
Sleeve
C
Lagging
E
Band
G
Sleeve with edge
I
Mortar or other incombustible caulking
J
Incombustible heat insulation material
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.)
Insulation materials for the pipes to be added on site must meet the following
ø6.35 to 25.4 mm
[1/4 to 1 in]
10 mm min.
Thickness
[13/32 in min.]
Temperature Resistance
*
Installation of pipes in a high-temperature high-humidity environment, such
(Unit: mm [in])
Outer wall
D
C
A B
D
F
G
B
boundary wall
I
J
A
1000
1000
[39-3/8]
[39-3/8]
B
Heat insulating material
D
Caulking material
F
H
Lagging material
Pipe size
ø28.58 to 41.28 mm
[1-1/8 to 1-21/32 in]
15 mm min.
[19/32 in min.]
100°C min. [212°F min.]
17
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