Sanyo Big PACi 18 Series Technical Data & Service Manual page 128

Big pack i dc inverter
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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. 1-7)
Fig. 1-7
* Necessary space is required to unscrew on the rear side
for maintenance and if a sufficient 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. 1-8)
Fig. 1-8
* 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. 1-9)
30 cm
or more
Fig. 1-9
In case of multiple installations
Provide a solid base (concrete block, 10 x 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. 1-10)
Use lug bolts or equal to bolt down unit, reducing vibration
and noise.
1
Air intake
Air intake
Air discharge
Air discharge
Anchor bolts
(4 pieces)
Min. 15 cm
or more
Fig. 1-10
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.
The air discharge outlet is facing a sidewalk and dis-
charged hot air annoys passers-by. (Fig. 1-11)
Air discharge
Fig. 1-11
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.
Countermeasures against snow and wind
In regions with snow and strong wind, the following pro-
blems may occur when the outdoor unit is not provided
with a platform and snow-proof ducting (Fig. 1-12):
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.
d) The condenser pressure may drop because of strong
wind, and the indoor unit may freeze.
Without snow-
With snow-proof
proof ducting
ducting
(Low platform)
(High platform)
Fig. 1-12
In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof duct.
1-123

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