Toshiba MMU-AP0091H Installation Manual page 41

5-18. Reference for Insulation Work
Reference
Sometimes, copper pipe with insulated sheathing is used in order to save labor. The following reference applies
to this type of pipe.
n Types and Characteristics of Copper Pipe with Insulated Sheathing
• Insulation: 8 to 10mm
<Pair coil>
Pair coil
n Condensation characteristics (Temperature inside pipe: 5°C, copper pipe 15.88mm)
• Insulation: 20mm
n Example uses for different
thicknesses of insulation
Insulating
material
When pipe is indoors, and a small
amount of condensation under
10mm
certain conditions is acceptable
When pipe is indoors, and even a
small amount of condensation is
20mm
unacceptable
Copper pipe (phosphoric-deoxidized seamless copper pipe)
Copper pipe (mm)
(Outer dia. × thickness)
6.35 × 0.8
9.52 × 0.8
6.35 × 0.8
Soft
12.70 × 0.8
Hard
6.35 × 0.8
Half hard
15.88 × 1.0
9.52 × 0.8
15.88 × 1.0
19.05 × 1.0
22.22 × 1.0
Hard
28.6 × 1.0
Half hard
34.9 × 1.1
41.3 × 1.25
Insulation
(chemically cross-linked
Outer film
30x foam polyethylene)
(polyethylene)
Copper pipe
(phosphoric-deoxidized
seamless copper pipe)
Example use
Insulation (chemically cross-linked 30x foam polyethylene)
Outer film (polyethylene)
Coil length
(m)
Outer dia. Thickness Outer dia. Thickness
20
20
20
20
—
—
—
—
—
Temperature inside pipe: 5˚C
100
90
80
70
60
50
40
30
20
10
0
n Insulation characteristics
Material Item
Copper
Material
pipe
Material
Insulation
Temperature
range
41
Heat insulator (mm) Heat insulator (mm)
24 8 48
27 8 51
24 8
34 10 54
24 8
37 10
27 8
37 10 57
— — 61
— — 64
— — 68
— — 76
— — 83
10mm
thickness
10 20
Temperature outside of pipe (˚C)
Safe zone
Condensation zone
Specifications
Phosphoric-deoxidized seamless
copper pipe
Chemically cross-linked 30x foam
polyethylene with textured outer
covering
–40°C to 120°C (shrinkage: 1%)
20
20
20
20
20
20
20
20
20
20mm
thickness
30 40