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5. Select the insulation of the refrigerant pipe.
Insulate the gas side and liquid side pipe referring to the thickness according to the pipe size.
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.
Insulator's heat-resistance temperature should be more than 120°C(248°F).
Pipe size
Pipe
mm
6.35 ~ 9.52
Liquid pipe
12.7 ~ 50.80
6.35
9.52 ~ 25.40
Gas pipe
28.58 ~ 44.45
50.80
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.
Insulation Type (Heating/Cooling)
General
[30°C(86°F), 85%]
inch
mm
1/4~3/8
9
1/2~2
13
1/4
13
3/8~1
19
1 1/8~1 3/4
19
2
25
High humidity
[30°C(86°F), over 85%]
EPDM, NBR
inch
mm
3/8
9
1/2
13
1/2
19
3/4
25
3/4
32
1 1/4
1
38
1 1/2
Remarks
inch
3/8
1/2
Heating resisting
3/4
temperature over
1
120°C(248°F)
13
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