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Refrigerant pipe installation
Insulating refrigerant pipe or Y-joint
X You must check if there is a gas leak before completing all the installation process. After you check that the gas does not
leak, you must insulate the pipe and hose.
X Use EPDM insulation which meets the following condition.
Item Unit Standard
Density g/cm
3
0.048~0.096
Dimension change route by heat % -5 or less
Water absorption rate g/cm
3
0.005 or less
Thermal conductivity kcal/m·h·˚C 0.032 or less
Moisture transpiration factor ng/(m²·s·Pa) 15 or less
Moisture transpiration grade g/(m²·24h) 15 or less
Formaldehyde dispersion mg/L -
Oxygen rate % 25 or more
Selecting the insulation of refrigerant pipe
X Insulate the gas pipe and liquid pipe by referring to the thickness of insulator for each pipe size.
X The standard condition is 30°C(86°F), with humidity less than 85%. In the conditions of high humidity, use one grade
thicker.
Pipe Pipe size [mm (inch)]
Insulation(Cooling, Heating)
Remarks
Standard
[30°C (86°F),
Below 85%]
High humidity
[30 °C (86°F),
85% or more]
EPDM,NBR
Liquid pipe
Ø6.35 ~ Ø9.52 (1/4 ~ 3/8) 9t
I
Heat resisting
temperature is more
than 120°C (248°F)
Ø12.70 ~ Ø50.80 (1/2 ~ 2) 13t
I
Gas pipe
Ø6.35 (1/4) 13t 19t
Ø9.52 (3/8)
19t 25t
Ø12.70 (1/2)
Ø15.88 (5/8)
Ø19.05 (3/4)
Ø22.23 (7/8)
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