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Installation space
Install the outdoor unit with a sufficient space around the
outdoor unit for operation and maintenance.
(1) Obstructions on the left side, right side and rear side
(Front side and above the unit are opened). (Fig. 2-5)
* Necessary space is required to unscrew on the rear side for
maintenance and if a suffi cient maintenance space is provided
on the rear side (40 cm), the space of over 15 cm is enough at
the right side.
(2) Obstructions on the front side and rear side (Left side, right
side and above the unit are opened). (Fig. 2-6)
* For compressor replacement, 50 cm or more is required on the
front side even when using the air discharge chamber.
(3) Obstructions on the front side and above the unit (Left side,
right side and rear side are opened). (Fig. 2-7)
In case of multiple installations
● Provide a solid base (concrete block, 10 × 40 cm beams or
equal), a minimum of 15 cm above ground level to reduce
humidity and protect the unit against possible water damage
and decreased service life. (Fig. 2-8)
● Use lug bolts or equal to bolt down unit, reducing vibration
and noise.
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Big_PAC_eng.indb 15
2-3. Air Discharge Chamber for Top Discharge
Be sure to install the air discharge chamber in the field when:
● it is difficult to keep a space of min. 1 m between the air
discharge outlet and an obstacle.
Fig. 2-5
● the air discharge outlet is facing a sidewalk and discharged
hot air annoys passers-by. (Fig. 2-9)
2-4. Installing the Unit in Heavy Snow Areas
In locations with strong wind, snow-proof ducting should
likewise be fitted and direct exposure to the wind should be
avoided as much as possible.
Fig. 2-6
■ Countermeasures against snow and wind
In regions with snow and strong wind, the following problems
may occur when the outdoor unit is not provided with a platform
and snow-proof ducting (Fig. 2-10):
a) The outdoor fan may not run and damage of the unit may be
caused.
b) There may be no airflow.
c) The tubing may freeze and burst.
30 cm
d) The condenser pressure may drop because of strong wind,
or more
and the indoor unit may freeze.
Fig. 2-7
In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof duct.
15
Air intake
Air intake
Air discharge
Air discharge
Anchor bolts
(4 pieces)
Min. 15 cm
or more
Air discharge
Without snow-
With snow-proof
proof ducting
ducting
(Low platform)
(High platform)
Fig. 2-8
Fig. 2-9
Fig. 2-10
2009/08/26 16:33:10
2009/08/26 16:33:10
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