13
ENGLISH
5. Select the insulation of the refrigerant pipe.
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Insulate the gas side and liquid side pipe referring to the thickness according to the pipe size.
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Indoor temperature of 30°C(86°F) and humidity of 85% is the stan dard condition. If installing in a high humidity
condition, use one grade thicker insulator by referring to the table below. If installing in an unfavorable conditions,
use thicker one.
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Insulator’s heat-resistance temperature should be more than 120°C(248°F).
Pipe
Pipe size
Insulation Type (Heating/Cooling)
Remarks
General
[30°C(86°F), 85%]
High humidity
[30°C(86°F), over 85%]
EPDM, NBR
mm
inch
mm
inch
mm
inch
Liquid pipe
6.35 ~ 9.52
1/4~3/8
9
3/8
9
3/8
Heating resisting
temperature over
120°C(248°F)
12.7 ~ 50.80
1/2~2
13
1/2
13
1/2
Gas pipe
6.35
1/4
13
1/2
19
3/4
9.52 ~ 25.40
3/8~1
19
3/4
25
1
28.58 ~ 44.45
1 1/8~1 3/4
19
3/4
32
1 1/4
50.80
2
25
1
38
1 1/2
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When installing insulation in places and conditions below, use the same insulation that is used for high humidity
conditions.
<Geological condition>
- High humidity places such as shoreline, hot spring, near lake or river, and ridge (when the part of the building is
covered by earth and sand.)
<Operation purpose condition>
- Restaurant ceiling, sauna, swimming pool etc.
<Building construction condition>
- The ceiling frequently exposed to moisture and cooling is not covered.
e.g. The pipe installed at a corridor of a dormitory and studio or near an exit that opens and closes frequently.
- The place where the pipe is installed is highly humid due to the lack of ventilation system.