2-2. Air-Discharge Chamber For Top Discharge - Panasonic U-4LE1E5 Installation Instructions Manual

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. 2-5)
● Use lug bolts or equal to bolt down unit, reducing vibration
and noise.
Air intake
Air discharge
Air discharge
Anchor bolts
(4 pieces)

2-2. Air-Discharge Chamber for Top Discharge

Be sure to install an air-discharge chamber in the field when:
● it is difficult to keep a space of min. 50 cm between the air
discharge outlet and an obstacle.
● the air discharge outlet is facing a sidewalk and discharged
hot air may annoy passers-by. Refer to Fig. 2-6.
Air discharge
In regions with significant snowfall, the outdoor unit
should be provided with a platform and snow-proof duct.
AMP Air Conditioning
Air intake
Min. 15cm
Fig. 2-5
Fig. 2-6
12
2-3. Installing the Unit in Heavy Snow Areas
In locations with strong wind, snow-proof ducting should 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 problems
may occur when the outdoor unit is not provided with a platform
and snow-proof ducting:
a) The outdoor fan may not run and damage to the unit may
occur.
b) There may be no air flow.
c) The tubing may freeze and burst.
d) The condenser pressure may drop because of strong wind,
and the indoor unit may freeze.
2-4. Precautions for Installation in Heavy Snow Areas
(1) The platform should be higher than the max. snow depth.
(Fig. 2-7)
Without snow-
proof ducting
(Low platform)
(2) The 2 anchoring feet of the outdoor unit should be used for
the platform, and the platform should be installed beneath
the air intake side of outdoor unit.
(3) The platform foundation must be firm and the unit must be
secured with anchor bolts.
(4) In case of installation on a roof subject to strong wind,
countermeasures must be taken to prevent the unit from
being blown over.
Outdoor
Min. 100
Unit
Duct
Duct
Platform (foundation)
Air intake
About 1/2 of the unit height
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With snow-
proof ducting
(High platform)
Fig. 2-7
Min. 100
308
Duct
Outdoor Unit
166
Unit: mm
Higher than the
maximum snow depth
Air intake
Fig. 2-8