16
Installation Procedure
Installation Procedure
English
NOTE
ŷ Always make the seam of pipes face upwards.
2 Wind insulating tape around the pipes and drain hose
avoiding compressing the insulation too much.
Insulation cover pipe
Insulation pipe
Be sure to overlap the insulation.
Indoor unit
CAUTION
ŷ Be sure to wrap insulation tightly without any gaps.
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 The pipes and electrical cables connecting the indoor
unit with the outdoor unit must be fixed to the wall
with suitable ducts.
CAUTION
ŷ Make sure that all refrigerant connection must be
accessible for easy maintenance and detachment.
ŷ Install the insulation not to get wider and use the
adhesives on the connection part of it to prevent
moisture from entering.
ŷ Wind the refrigerant pipe with insulation tape if it is
exposed to outside sunlight.
ŷ Install the refrigerant pipe respecting that the
insulation does not get thinner on the bent part or
hanger of pipe.
ŷ Add the additional insulation if the insulation plate
gets thinner.
a x 3
Hanger
Additional insulation
a
Refrigerant pipe
insulation
5 Select the insulation of the refrigerant pipe.
ŷ Insulate the gas side and liquid side pipe, noting
the insulation thickness that must differ according
to the pipe size.
ŷ 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.
ŷ The heat-resistance temperature of the insulator
must be more than 120°C.
Pipe
Pipe size
(mm)
Insulation type
(heating/cooling)
Remarks
Standard
(Less than
30°C, 85%)
High humidity
(Over 30°C,
85%)
EPDM, NBR
(mm)
Liquid
pipe
Ø6.35 to
Ø9.52
9t 9t
The internal
temperature
is higher
than 120°C.
Ø12.7 to
Ø19.05
13t 13t
Gas
pipe
Ø6.35 13t 19t
Ø9.52
19t 25t
Ø12.70
Ø15.88
Ø19.05
ŷ 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.
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