En-4
3. 2. Drain processing
CAUTION
Perform drain work in accordance with this Manual, and ensure that the drain water is
properly drained. If the drain work is not carried out correctly, water may drip down from
the unit, wetting the furniture.
When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe and
drain cap. If the drain pipe and drain cap are used, the drain water in the pipe may freeze
in extremely cold weather.
• As the drain water
fl
ows out of the outdoor unit during heating operation, install the
drain pipe and connect it to a commercial 5/8 in (16 mm) hose.
• When installing the drain pipe, plug all the holes other than the drain pipe mounting
hole in the bottom of the outdoor unit with putty so there is no water leakage.
13-7/16 (341)
12 (305)
12-5/8 (321)
8-15/16 (227)
17-1/4 (438)
10-15/16 (278)
1-15/16 (50)
24-1/2 (622)
Unit: in (mm)
Drain cap
mounting
hole ×3
Base
Air
Drain
pipe
Drain pipe mounting hole
3. 3. Installation dimensions
CAUTION
Provide suf
fi
cient installation space, such as transportation route, maintenance space,
ventilation space, refrigerant piping space, and passageways.
Pay attention to the speci
fi
cations of the installation space as shown in the
fi
gure. If
the unit is not installed according to speci
fi
cations, 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 suf
fi
cient
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 suf
fi
cient space for the refrigerant piping.
Observe the installation space speci
fi
cations
that are shown in the
fi
gures.
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 speci
fi
cations, 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 signi
fi
cantly.
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
12 (300)
Max. 19 (500)
40 (1000)
(2) Obstacles at rear, sides, and above only
60
(1500)
10 (250)
10 (250)
20 (500)
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)
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