Insulating The Refrigerant Tubing - Panasonic U-8ME1E8 Installation Instructions Manual

5-3. Insulating the Refrigerant Tubing

Tubing Insulation
● Standard Selection of Insulation Material
Under the environment of the high temperature and high
humidity, the surface of the insulation material is easy to
become condesation. This will result in leakage and dew
drop. Refer to the chart shown below when selecting the
insulation material. In case that the ambient temperature and
relative humidity are placed above the line of the insulation
thickness, the condensation may occasionally make a dew
drop on the surface of the insulation material. In this case,
select the better insulation efficiency.
* However, since the condition will be different due to
the sort of the insulaton material and the environmental
condition of the installation place, see the chart shown
below as a reference when making a selection.
Standard Selection of Tubing Insulation
Calculating condition
Sort of insulation material
Thermal conductivity
of insulation material
Calculating formula used
when calculating thickness
Refrigerant temperature
o6.35
100
90
80
70
60
50
40
10 20
Ambient temperature [°C]
o15.88
100
90
80
70
60
50
40
10 20
Ambient temperature [°C]
o25.4
100
90
80
70
60
50
40
10 20
Ambient temperature [°C]
Polyethylene heat resisting
material
Based on JIS A9501
Based on JIS A9501
2°C
100
90
Thickness
30mm
80
Thickness
20mm
70
Thickness
60
10mm
50
40
30 40 50 10
100
90
Thickness
30mm 80
Thickness
70
20mm
60
Thickness
10mm
50
40
30 40 50 10
100
90
Thickness
80
30mm
Thickness
70
20mm
60
Thickness
50
10mm
40
30 40 50 10
o9.52
Thickness
30mm
Thickness
20mm
Thickness
10mm
20 30 40
Ambient temperature [°C]
o19.05
Thickness
30mm
Thickness
20mm
Thickness
10mm
20 30 40
Ambient temperature [°C]
o28.58
Thickness
30mm
Thickness
20mm
Thickness
10mm
20 30 40
Ambient temperature [°C]
33
Two tubes arranged together
Liquid tubing
Insulation
Three tubes arranged together
Cosmetic
(finishing) tape
Gas tubing
Liquid tubing
Balance tubing
Insulation
Fig. 5-7
o12.7
100
90
80
70
60
50
40
50 10 20 30
Ambient temperature [°C]
o22.22
100
90
80
70
60
50
40
50 10 20 30
Ambient temperature [°C]
o31.75
100
90
80
70
60
50
40
50 10 20 30
Ambient temperature [°C]
Gas tubing
Thickness
30mm
Thickness
20mm
Thickness
10mm
40 50
Thickness
30mm
Thickness
20mm
Thickness
10mm
40 50
Thickness
30mm
Thickness
20mm
Thickness
10mm
40 50