ENGLISH-28
Refrigerant piping w
o
rk
Selecting the insulat
o
r
o
f the refrigerant pipe
f
According to pipes size, insulate pipes on gas and liquid side by selecting appropriate insulations.
f
Standard condition is under a temperature of 30
°C and a humidity of 85
%. If the units are installed in extreme weather
conditions, select the insulator by table below.
Pipe type
Pipe diameter (mm)
Thickness
o
f insulat
o
r
Remarks
N
o
rmal
(Under 30
°C, 85
%)
High humidity
(Over 30
°C, 85
%)
EPDM, NBR
Liquid
ø6.35~ø19.05
9
9
The material shall has
heat resistant over
120
°C
ø12.70~ø19.05
13
13
Gas
ø6.35
13
19
ø9.52
19
25
ø12.70
ø15.88
ø19.05
•
Install the insulation not to be get wider and use the adhesives on the connection part of it to prevent moisture
entering.
•
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.
CAUTION
Insulating the refrigerant pipe
f
You must check if there is a gas leak before completing all the installation process.
f
Use EPDM insulation which meets the following condition.
Item
Unit
Standard
Remarks
Density
g/cm
²
0.048~0.096
KSM 3014-01
Dimension change route by heat
%
-5 or less
Water absorption rate
g/cm
²
0.005 or less
Thermal conductivity
kcal/m·h·˚C
0.032 or less
KSL 9016-95
Moisture transpiration factor
ng/(m
²
·s·Pa)
15 or less
KSM 3808-03
Moisture transpiration grade
{g/(m
²
·24h)}
15 or less
KSA 1013-01
Formaldehyde dispersion
mg/L
-
KSF 3200-02
Oxygen rate
%
25 or less
ISO 4589-2-96
