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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.
(heating/cooling)
Standard
Pipe
Pipe size
(Less than
30°C,
85%)
Ø6.35 to
Ø9.52
Liquid
pipe
Ø12.7 to
13t
Ø19.05
Ø6.35
13t
Ø9.52
Gas
Ø12.70
pipe
19t
Ø15.88
Ø19.05
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.
14
English
Insulation type
High
humidity
Remarks
(Over 30°C,
85%)
EPDM, NBR
9t
9t
13t
The internal
19t
temperature
is higher than
120°C.
25t
Step 10 Installing the drain hose and
drain pipe
1 Push the supplied drain hose as far as possible over
the drain socket.
2 Tighten the metal clamp as shown in the picture.
3 Wrap the supplied large sealing pad over the metal
clamp and drain hose to insulate and fix it with
clamps.
4 Insulate the complete drain piping inside the building
(field supply).
If the drain hose cannot be sufficiently set on a slope,
fit the hose with drain raising piping (field supply).
5 Push the drain hose up to insulation when connecting
the drain hose to drain socket.
Metal clamp
Large seailng pad
Drain hose
CAUTION
Check that the indoor unit is level with the ceiling by
using the leveller.
Drain socket
Drain hose
Drain pipe
Be sure to bond the drain
hose and the main pipe.
PVC Tube Joint
+ VP25 (OD: 32 mm, ID: 25 mm)
Drain pipe
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