Panasonic U-8ME1E8 Mode D'emploi page 19

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
Polyethylene heat resisting
Sort of insulation material
material
Thermal conductivity
Based on JIS A9501
of insulation material
Calculating formula used
Based on JIS A9501
when calculating thickness
Refrigerant temperature 2°C
o6.35 o9.52
100 100
90 Thickness 90
30mm
80 80
Thickness
20mm
70 70
Thickness
60 60
10mm
50 50
40 40
10 20 30 40 50 10 20
Ambient temperature [°C]
Ambient temperature [°C]
o15.88 o19.05
100 100
90 90
Thickness
80 30mm 80
Thickness
70 20mm 70
60 60
Thickness
10mm
50 50
40 40
10 20 30 40 50 10 20
Ambient temperature [°C] Ambient temperature [°C]
o25.4 o28.58
100 100
90 90
Thickness
80 80
30mm
Thickness
70 70
20mm
60 60
Thickness
50 50
10mm
40 40
10 20 30 40 50 10 20
Ambient temperature [°C] Ambient temperature [°C]
SUPPLEMENT
Two tubes arranged together
Liquid tubing
Gas tubing
Insulation
Three tubes arranged together
Cosmetic
(finishing) tape
Gas tubing
Liquid tubing
Insulation Balance tubing
Fig. 5-7
o12.7
100
90
Thickness Thickness
30mm 30mm
80
Thickness
Thickness
20mm
20mm
70
60
Thickness
Thickness
10mm
10mm
50
40
30 40 50 10 20 30 40 50
Ambient temperature [°C]
o22.22
100
90
Thickness
Thickness
80
30mm
30mm
Thickness
Thickness
70
20mm
20mm
60
Thickness
Thickness
10mm
50 10mm
40
30 40 50 10 20 30 40 50
Ambient temperature [°C]
o31.75
100
90
Thickness Thickness
80
30mm 30mm
Thickness Thickness
70
20mm 20mm
60
Thickness Thickness
50
10mm 10mm
40
30 40 50 10 20 30 40 50
Ambient temperature [°C]
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o38.1 o41.28
100 100
90 90
Thickness
80
80
30mm
Thickness
70
70
20mm
60 60
Thickness
50 50
10mm
40
40
10 20 30 40 50 10 20 30
Ambient temperature [°C] Ambient temperature [°C]
If the exterior of the outdoor
unit valves has been fi nished
with a square duct covering,
CAUTION
make sure you allow suffi cient
space to use the valves and
to allow the panels to be
attached and removed.
Taping the fl are nuts
Wind the white insulation tape around the flare nuts at the
gas tube connections. Then cover up the tubing connections
with the flare insulator, and fill the gap at the union with the
supplied black insulation tape. Finally, fasten the insulator at
both ends with the supplied vinyl clamps. (Fig. 5-8)
Insulation material
The material used for insulation must have good insulation
characteristics, be easy to use, be age resistant, and must not
easily absorb moisture.
After a tube has been
insulated, never try to bend it
CAUTION
into a narrow curve because
it can cause the tube to break
or crack.
Thickness
30mm
Thickness
20mm
Thickness
10mm
40 50
Sealer (supplied)
Insulation tape (white)
(supplied)
Flare insulator (supplied)
Tube insulator
(not supplied)
Unit side
insulator Heat resistant
120°C or above
Flare nut
Vinyl clamps (supplied)
Fig. 5-8
Refrigerant tubing and insulator
(not supplied)
Drain pipe and insulator
Drain insulator
(not supplied)
and clamp. Large
(supplied)
Packing
clamp. Small
hose band Insulation
(supplied) tape
Vinyl
Flare clamp
insulator
Seal
The procedure used for
installing the insulator
for both gas and liquid
tubes is the same.
Fig. 5-9
Never grasp the drain or refrigerant connecting outlets
when moving the unit.
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