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Refrigerant piping work
Selecting the insulator of the refrigerant pipe
f According to pipes size, insulate pipes on gas and liquid side by selecting appropriate insulations .
f
f Standard condition is under a temperature of 30 °C and a humidity of 85 % . If the units are installed in extreme weather
f
conditions, select the insulator by table below .
Pipe type
Pipe diameter (mm)
ø6 . 3 5~ø19 . 0 5
Liquid
ø12 . 7 0~ø19 . 0 5
ø6 . 3 5
ø9 . 5 2
Gas
ø12 . 7 0
ø15 . 8 8
ø19 . 0 5
• Install the insulation not to be get wider and use the adhesives on the connection part of it to prevent moisture
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 .
Insulating the refrigerant pipe
f You must check if there is a gas leak before completing all the installation process .
f
f Use EPDM insulation which meets the following condition .
f
Item
Density
Dimension change route by heat
Water absorption rate
Thermal conductivity
Moisture transpiration factor
Moisture transpiration grade
Formaldehyde dispersion
Oxygen rate
Thickness of insulator
Normal
(Under 30 °C, 85 %)
EPDM, NBR
9
13
13
19
Unit
g/cm²
%
g/cm²
kcal/m·h·˚C
ng/(m²·s·Pa)
{g/(m²·24h)}
mg/L
%
ENGLISH-28
High humidity
(Over 30 °C, 85 %)
9
13
19
25
Standard
0 . 0 48~0 . 0 96
-5 or less
0 . 0 05 or less
0 . 0 32 or less
15 or less
15 or less
-
25 or less
Remarks
The material shall has
heat resistant over
120 °C
Remarks
KSM 3014-01
KSL 9016-95
KSM 3808-03
KSA 1013-01
KSF 3200-02
ISO 4589-2-96
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