4
2. Installation location
2.4. Ventilation and service space
2.4.1. When installing a single outdoor unit.
When installing a part that is sold separately, make sure to provide the required space
for that part as indicated in its manual.
(1) Basic information for determining required space (Fig. 2-3)
The required space for the back of the unit is determined by the air intake port;
100 mm or more is required. However, providing the same amount of space as at
the front of the unit, approximately 450 mm, will make servicing the unit easier.
(2) Overhead obstacles (Fig. 2-4)
1
If there is little space between the unit and the obstruction (Fig. 2-5)
2
Provide outlet blower guide. (Procure locally.)
(3) If the intake air enters from the right and left sides (Fig. 2-6)
• The front and rear wall height, expressed as “H,” shall be the same height or
lower than the overall height of the unit.
• If this height exceeds that of the overall height of the unit, add the dimension
shown as “h” in the drawing on the left to L1 and L2 on Table 1.
Table 1
(mm)
L1
L2
450
100
(4) When there are walls around the unit (Fig. 2-7)
• When the front and rear wall height, shown as “H,” is the same or lower than the
front and rear panels of the unit.
• If the panel height exceeds that of the overall height of the unit, add the dimen-
sion shown as “h” in the drawing on the left to L1 and L2 on Table 2.
Table 2
(mm)
L1
L2
450
100
2.4.2. When installing multiple outdoor units (Fig. 2-8)
• When installing multiple units, make sure to take into consideration factors such as
providing enough space for people to pass through, ample space between blocks
of units and sufficient space for air flow as shown in the drawing on the left.
* 250 mm or more is required behind the unit, but providing 450 mm or more of space
behind the unit will make servicing easier.
Example: If “h” is 100 mm, the “L1” dimension will be
450 mm + 100 mm = 550 mm.
Fig. 2-3
Fig. 2-4
Fig. 2-5
Fig. 2-6
Fig. 2-7
Fig. 2-8
1
2
3
4
6
5
1
As viewed from the top.
2
As viewed from the
side.
3
Front.
4
Front intake port (Open,
if possible)
5
Rear intake port (Open,
if possible)
6
Top intake port (Open,
if possible)
2
1
1
Front
2
No wall height restric-
tions (both right and left)
3
As viewed from the
side.
h
H
1
4
2
3
1
Wall height (H)
2
Front side
3
Leave open
1
Front
2
Front panel (Front side)
3
Rear panel
4
As viewed from the side
3
3
1
2
2
1
2
3
3
2
1
(mm)
(mm)
(mm)
(mm)
(mm)
Min. 100
Min. 450
Min. 300
Min. 1000
Min. 45°
Min. L1
Min. L2
Min. L1
Min. L2
Min. 45
Min. 45
Min. L1
Min. L2
Min. L1
Min. L2
Min. 45
Min. 45
Min.
90
Min.
90
Min.
90
Min.
90
Min.
90
Min.
90
Min.
1000
Min. 450*
Min. 250*
Min.
90
Min.
90
Min.
90
Min.
90
Min.
90
Min.
90
Min. 250*
Min.
900
Min. 250*
Min.
90
Min.
90
Min.
90
Min.
90
Min.
90
Min.
90
Min.
1000
h
H
2
1
1
3
Summary of Contents for 250 YHA-A
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