12
Installation Procedure
English
Installation Pr
oc
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5
Select the insulation of the refrigerant pipe.
• Insulate the gas side and liquid side pipe, noting the insulation thickness that must differ according to the pipe size.
• Standard: Less than an indoor temperature of 30°C (86°F), with humidity at 85%. If installing in a high humidity
environment, use one grade thicker insulator by referring to the table below. If installing in an unfavourable
environment, use thicker one.
• The heat-resistance temperature of the insulator must be more than 120°C (248°F).
Pipe
Outer diameter
Insulation Type (Cooling, Heating)
Remarks
General
[30°C(86°F), 85%]
High humidity
[30°C(86°F), over 85%]
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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)
12.7~50.80
1/2~2
13
1/2
13
1/2
Gas pipe
6.35
1/4
13
1/2
19
3/4
9.52~25.4
3/8~1
19
3/4
25
1
28.58~44.45
1 1/8~1 3/4
19
3/4
32
1 1/4
50.8
2
25
1
38
1 1/2
• When installing insulation in the places and conditions
below, use the same insulation that is used for high
humidity conditions.
<Geological condition>
High humidity locations such as shorelines, hot springs,
lake or riversides, and ridges (when part of the building is
covered by earth and sand)
<Operation purpose condition>
Restaurant ceiling, sauna, swimming pool etc.
<Building construction condition>
Ceilings frequently exposed to moisture and cooling are
not covered. For example, pipes installed at a corridor of a
dormitory and studio or near an exit that opens and closes
frequently.
Places (where the pipes are installed) that are highly
humid due to a lack of ventilation.
• Refrigerant pipe before EEV kit and MCU or without
EEV kit and MCU
– You can contact the gas side and liquid side pipes
but the pipes should not be pressed.
– When contacting the gas side and liquid side pipe,
use 1 grade thicker insulator.
• Refrigerant pipe after EEV kit and MCU
– Install the gas side and liquid side pipes, leave
10 mm (3/8") of space.
– When contacting the gas side and liquid side pipe,
use 1 grade thicker insulator.
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