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3.2. Drain processing
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 32 °F (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.
• If you are installing the drain pipe and drain caps,
please provide a working space under the base of
the outdoor unit.
• As the drain water flows 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.
Air
Drain cap mounting
Drain pipe
hole × 9
mounting hole
3.3. Installation dimensions
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.
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.
Keep the space shown in the installation examples.
If the installation is not performed accordingly, it
could cause a short circuit and result in a lack of
operating performance.
Do not obstruct the air intake of the outdoor unit with
piping, wiring, stand, etc.
Refer to the Design and Technical Manual for installations not described in the following
examples.
Other installation is not recommended. Performance may drop significantly.
CAUTION
Drain pipe mounting hole
Base of the outdoor unit
Drain pipe
Unit: in (mm)
23-5/8 (600)
CAUTION
Front
Air intake
3.3.1 Single outdoor unit installation
When the upward area is open
(1) Obstacles at rear only
(3) Obstacles at front only
When an obstruction is present also in the upward area
(1) Obstacles at rear and above only
Max. 19
(500)
3.3.2 Multiple outdoor unit installation
• Provide at least 4 in (100 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.
When the upward area is open
(1) Obstacles at rear only
(3) Obstacles at front and rear only
When an obstruction is present also in the upward area
(1) Obstacles at rear and above only
• Up to 3 units can be installed side by side.
• When 4 units or more are arranged in a line, provide the space as shown below.
Max. 11 (300)
Rear
Unit: in (mm)
(2) Obstacles at rear and sides only
4 (80)
4 (100)
or more
or more
8 (200) or more
(4) Obstacles at front and rear only
40 (1000)
or more
(2) Obstacles at rear, sides, and above only
40 (1000)
or more
4 (80)
4 (100)
or more
or more
8 (200) or more
Unit: in (mm)
(2) Obstacles at front only
12 (300)
or more
20 (500) or more
60 (1500) or more
60 (1500)
or more
12 (300)
or more
4 (100)
or more
40 (1000) or more
Unit: in (mm)
60 (1500)
or more
12 (300)
or more
60 (1500)
or more
Unit: in (mm)
60 (1500)
or more
20 (500)
or more
En-4
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