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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
30°C(86°F)
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 ~ 19.05
6.35
9.52
Gas
12.7
pipe
15.88
19.05
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.
Install the insulation not to get wider and use the adhesives on the connection part of it to prevent moisture from
entering.
CAUTION
Wind the refrigerant pipe with insulation tape if it is exposed to outside sunlight.
Install the refrigerant pipe respecting that the insulation does not get thinner on the bent part or hanger of pipe.
Add the additional insulation if the insulation plate gets thinner.
Additional insulation
10
and humidity of 85 % is the standard condition.
Insulation Type (Heating/Cooling)
General
[30°C(86°F), 85%]
EPDM, NBR
inch
mm
inch
1/4~3/8
9
3/8
1/2~3/4
13
1/2
1/4
13
1/2
3/8
19
3/4
1/2
19
3/4
5/8
19
3/4
3/4
19
3/4
Hanger
a
Insulated refrigerant pipe
a×3
High humidity
[30°C(86°F), over 85%]
Remarks
mm
inch
9
3/8
13
1/2
19
3/4
Heating resisting
25
1
temperature over
120°C(248°F)
25
1
25
1
25
1
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