En-4
3.3. Installation
dimensions
CAUTION
Provide sufficient installation space, such as transportation route, maintenance space,
ventilation space, refrigerant piping space, and passageways.
Pay attention to the specifications of the installation space as shown in the figure. If
the unit is not installed according to specifications, it may cause short circuit or poor
performance. The unit may be prone to lapse into non-operation due to high pressure
protection.
When there is a wall in front of the unit, provide a space of 20 in (500 mm) or more as
maintenance space.
When there is a wall at the right side of the unit, provide a space of 2 in (25 mm) or
more as maintenance space.
An outdoor temperature of 95 °F (DB) (35 °C (DB)) in air-conditioned operation is as-
sumed for the installation space in this item. If the outdoor temperature exceeds 95 °F
(DB) (35 °C (DB)) and the outdoor unit is operating at a load exceeding its rated ability,
provide a larger inlet space.
If you are installing more outdoor units than indicated here, please ensure sufficient
space or consult your distributing agent as it may affect the performance due to short
circuit and other problems.
Consider the transportation route, installation space, maintenance space, and access,
and install the unit in a location with sufficient space for the refrigerant piping.
Observe the installation space specifications
that are shown in the figures.
Keep the same space at rear air intake.
Provide the same space for the air intake at the
rear of the outdoor unit.
If the installation is not performed according to
the specifications, it could cause a short circuit
and result in a lack of operating performance.
As a result, the outdoor unit might easily be
stopped by high-pressure protection.
Air
intake
Rear view
Installation methods not shown in the following examples are not recommended. Perfor-
mance may drop significantly.
3.3.1. Single outdoor unit installation
When the upward area is open
Unit: in (mm)
(1) Obstacles at rear only
6 (150)
(2) Obstacles at rear and sides only
8 (200)
12 (300)
8 (200)
(3) Obstacles at front only
40 (1000)
or more
(4) Obstacles at front and rear only
40 (1000) or
more
6 (150)
When an obstruction is present also in the upward area
Unit: in (mm)
(1) Obstacles at rear and above only
6 (150)
Max. 19 (500)
40 (1000)
(2) Obstacles at rear, sides, and above only
40
(1000)
6 (150)
6 (150)
6 (150)
Max. 19 (500)
3.3.2. Multiple outdoor unit installation
• Provide at least 1 in (25 mm) of space between the outdoor units if multiple units are
installed.
• When routing the piping from the side of an outdoor unit, provide space for the piping.
• No more than 3 units must be installed side by side.
When 3 units or more are arranged in a line, provide the space as shown in the following
example when an obstruction is present also in the upward area.
When the upward area is open
Unit: in (mm)
(1) Obstacles at rear only
12 (300)
(2) Obstacles at front only
60 (1500)
or more
(3) Obstacles at front and rear only
20 (500)
60 (1500) or more
When an obstruction is present also in the upward area
Unit: in (mm)
• Obstacles at rear and above only
60 (1500)
20 (500)
Max. 11 (300)
60 (1500)
3.3.3. Outdoor units installation in multi row
* The following settings are not recommended in case of cooling by a low outside tem-
perature. Unit: in (mm)
(1) Single parallel unit arrangement
6 (150)
24 (600)
40 (1000)
79 (2000)
or more
(2) Multiple parallel unit arrangement
20 (500)
24 (600)
60 (1500)
119 (3000)
or more
3.4. Transporting the unit
WARNING
Do not touch the fins. Otherwise, personal injury could result.
CAUTION
Handle
Handle
Suction grille
When carrying the unit, hold the
handles on the right and left sides and
be careful.
If the outdoor unit is carried from
the bottom, hands or fingers may be
pinched.
Be sure to hold the handles on the sides
of the unit. Otherwise, holding the suc-
tion grille on the sides of the unit may
cause deformation.
3.5. Installing the unit
• Please install the outdoor unit without slant. (within 3 degrees )
• Install 4 anchor bolts at the locations indicated with arrows in the figure.
• To reduce vibration, do not install the unit directly on the ground. Install it on a secure
base (such as concrete blocks).
• The foundation shall support the legs of the unit and have a width of 2 in (50 mm) or
more.
• Depending on the installation conditions, the outdoor unit may spread its vibration during
operation, which may cause noise and vibration. Therefore, attach damping materials
(such as damping pads) to the outdoor unit during installation.
• Install the foundation, making sure that there is enough space for installing the connec-
tion pipes.
• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially avail-
able M10 bolts, nuts, and washers.)
• The bolts should protrude 13/16 in (20 mm). (Refer to the figure.)
• If overturning prevention is required, purchase the necessary commercially available
items.
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