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Installation Procedure
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,
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.
Insulation Type
(Heating/Cooling)
Standard
Pipe size
Pipe
(mm)
[30°C,
85%]
Ø6.35 to
9t
Ø9.52
Liquid
pipe
Ø12.7 to
13t
Ø50.80
Ø6.35
13t
Ø9.52 to
Ø25.40
Gas
19t
pipe
Ø28.58 to
Ø44.45
Ø50.80
25t
• 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.
12
English
High
humidity
Remarks
[30°C, over
85%]
EPDM, NBR
Internal
19t
temperature
is higher than
25t
120°C
32t
38t
• 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
10mm of space.
When contacting the gas side and liquid side pipe,
use 1 grade thicker insulator.
Step 10 Installing the drain hose and
drain pipe
1 Fix the flexible hose to the drain pipe.
• The connection port of the flexible hose and PVC drain
pipe must be fixed with PVC adhesives.
Check out that the connected part doesn't leak.
Drain hose
2 Connect the flexible hose to the drain hose port.
• Make sure that a rubber ring is installed on the drain
hose port.
• The drain hose port location differs depending on the
unit types.
PVC Tube Joint
+ VP25 (OD: 32 mm, ID: 25 mm)
VP 20 (Drain pipe)
(OD: 26mm, ID: 20mm)
Drain hose port
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