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Performing leak test & insulation
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 86 °F(30 °C) and humidity of 85% is the standard condition.If install in a high humidity condition,use
one grade thicker insulator by referring to the table below.If installing in an unfavorable conditions, use a thicker wall
insulation.
Insulator's heat-resistance temperature should be more than 248 °F (120 °C).
Outer diameter
Pipe
mm
6.35~9.52
Liquid pipe
12.7~50.8
6.35
9.52~25.4
Gas pipe
28.58~44.45 1 1/8~1 3/4
50.8
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 (Cooling/Heating)
General [30°C (86°F),
85% or below]
inch
mm
inch
1/4~3/8
9
1/2~2
13
1/4
13
3/8~1
19
19
2
25
14
High humidity [30°C
(86°F), more than 85%]
EPDM, NBR
mm
inch
3/8
9
3/8
1/2
13
1/2
1/2
19
3/4
3/4
25
1
3/4
32
1 1/4
1
38
1 1/2
Remarks
Internal
temperature
is higher than
248 °F (120 °C)
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