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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 sufficient space between the air
discharge outlet and an obstacle.
● the air discharge outlet is facing a sidewalk and discharged
hot air may annoy passers-by.
Air discharge
In regions with significant snowfall, the outdoor unit
should be provided with a platform and snow-proof duct.
2-3. Installing the Outdoor 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.
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 Unit
Duct
Air intake
20
With snow-
proof ducting
(High platform)
Duct
Higher than the maximum
snow depth + 500 mm
Air intake
Platform (foundation)
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