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I-90
SM831148
1. Specifications
Fig. 1-5
Air discharge
Air discharge
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. 20" between the
air discharge outlet and an obstacle.
the air discharge outlet is facing a sidewalk and
discharged hot air may bother passers-by.
Refer to Fig. 1-5.
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.
Precautions for Installation in Heavy Snow Areas
1) The platform should be higher than the max. snow
depth. (Fig. 1-6)
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.
In regions with significant snowfall, the outdoor unit
should be provided with a platform and snow-proof duct.
Fig. 1-6
Without snow-
proof ducting
(Low platform)
With snow-
proof ducting
(High platform)
Fig. 1-7
Outdoor
Duct
Air
Unit
Intake