10
Performing leak test & insulation
5 Select the insulation of the refrigerant pipe.
f Insulate the gas side and liquid side pipe referring to the thickness according to the pipe size.
f Indoor temperature of
30°C(86°F) and humidity of 85% is the standard 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.
f Insulator’s heat-resistance temperature should be more than 120°C(248 °F).
Pipe
Pipe size
Insulation Type (Heating/Cooling)
Remarks
General
[30°C(86°F), 85%]
High humidity
[30°C(86°F), over 85%]
EPDM,NBR
mm inch mm inch mm inch
Liquid
pipe
6.35 ~ 9.52 1/4~3/8 9 3/8 9 3/8
Heating resisting
temperature over
120°C(248°F)
12.7 ~ 19.05 1/2~3/4 13 1/2 13 1/2
Gas
pipe
6.35 1/4 13 1/2 19 3/4
9.52 3/8 19 3/4 25 1
12.7 1/2 19 3/4 25 1
15.88 5/8 19 3/4 25 1
19.05 3/4 19 3/4 25 1
f 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.
t Install the insulation not to get wider and use the adhesives on the connection part of it to prevent moisture from
entering.
t Wind the refrigerant pipe with insulation tape if it is exposed to outside sunlight.
t Install the refrigerant pipe respecting that the insulation does not get thinner on the bent part or hanger of pipe.
t Add the additional insulation if the insulation plate gets thinner.
Additional insulation
Hanger
Insulated refrigerant pipe
a×3
a
CAUTION
To Next Page
Loading...
