6
EN
• A place which provides enough space around the outdoor
unit as shown in the diagram.
• A place which can bear the weight of the outdoor unit and
does not allow an increase in noise level and vibration.
• A place where the operation noise and discharged air do not
disturb neighbors.
• A place which is not exposed to a strong wind.
• A place free of combustible gases.
• A place which does not block a passageway.
• When the outdoor unit is to be installed in an elevated
position, be sure to secure its feet.
• Piping connections to the outdoor unit should be arranged in
the sequence A, then B, C, starting from the bottom. (For
each piping connection, the gas pipe is on the bottom and the
liquid pipe on top.)
• When multiple indoor units are to be connected to the
outdoor unit, make sure the ends of the pipes and wires from
each indoor unit are connected to the outdoor unit correctly.
(Problems caused by indoor units being connected to the
outdoor unit incorrectly are very common in multiple-unit
installations.)
• The length and height differences of the connecting pipes
between the indoor and outdoor units must be within the
ranges indicated below.
Allowable piping length and height difference
* Connect two or more indoor units to the 3M18.
• If the outdoor unit is to be mounted on a wall, make sure the platform supporting it is sturdy enough.
The platform should be designed and manufactured to maintain its strength over a long period of time, and sufficient consideration
should be given to ensuring that the outdoor unit will not fall.
• When the outdoor unit is to be mounted high on a wall, take particular care to ensure that parts do not fall, and that the installer is
protected.
• When doing installation work at ground level, it is usual to make wiring and pipe connections to the indoor units, first, and then to
make connections to the outdoor unit.
However, if outdoor work is difficult it is possible, instead, to make changes to the procedure.
For example, by making adjustments to the wiring and piping lengths on the inside (rather than the outside).
• A place where the drain water does not cause any problems.
4 INSTALLATION OF OUTDOOR UNIT
Installation Location
Outdoor unit
Piping length
Height difference
Minimum for 1 unit
Maximum for 1 unit
Maximum for
total of 3 units
RAS-3M18SAV-E
2 m
20 m
50 m
10 m
RAS-3M18SACV-E
RAS-3M23GACV-E
40 m
100 mm or more
from wall
250 mm or
more from
wall
50 mm or
more from wall
200 mm or more
Extension drain hose
80 mm or more only
when unobstructed to
the front and both sides
In principle,
leave open
When installing the
outdoor unit, leave open
in at least two of
directions (A), (B), (C)
and (D) shown in the
right figure.
Ensure sufficient space
to allow drainage
(A)
(B)
(C)
(D)
power
cord
As shown in the
figure, position
power cord and
connecting
cable
downward, and
lead out along
piping
connection port.
Installation diagram of outdoor units
Item
01_OutdoorInstallation_EN.fm Page 6 Monday, February 5, 2007 4:11 PM
