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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 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 thicker one.
• Insulator’s heat-resistance temperature should be more than 120°C.
Pipe Pipe size
Insulation Type (Heating/Cooling)
Remarks
Standard
[30°C, 85%]
High humidity
[30°C, over 85%]
EPDM, NBR
Liquid pipe
Ø6.35 ~ Ø9.52 9t 9t
Internal temperature is
higher than 120°C
Ø12.7 ~ Ø50.80 13t 13t
Gas pipe
Ø6.35 13t 19t
Ø9.52~Ø25.40
19t
25t
Ø28.58~Ø44.45 32t
Ø50.80 25t 38t
• 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.
NASA_Big Duct_AM@@@FNHDEH@_IM_03864A-05_EN.indd 15 2016-04-01 오후 5:29:41
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