12
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 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.
Installtheinsulationnottogetwiderandusetheadhesivesontheconnectionpartofittoprevent
moisturefromentering.
Windtherefrigerantpipewithinsulationtapeifitisexposedtooutsidesunlight.
Installtherefrigerantpiperespectingthattheinsulationdoesnotgetthinneronthebentpartor
hangerofpipe.
Addtheadditionalinsulationiftheinsulationplategetsthinner.
Additional insulation
Hanger
Refrigerant pipe insulation
a×3
a
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 ~ Ø19.05
13t
13t
Gas
pipe
Ø6.35
13t
19t
Ø9.52
19t
25t
Ø12.70
Ø15.88
Ø19.05
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.
