2-2. Removing Fin Guard For Heat Exchanger; 2-3. Shield For Horizontal Exhaust Discharge; 2-4. Installing The Outdoor Unit In Heavy Snow; Areas - Panasonic U-72MF1U9 Installation Instructions Manual

2-2. Removing Fin Guard for Heat Exchanger

After installation of the outdoor unit, detach the fin guard for
heat exchangers as following steps.
1. Cut out the fin guard entirely attached to the panel and
remove it from the outdoor unit. Pay careful attention not
to damage the fin when cutting out the fin guard.
2. If there is a case where easy to touch the sharp
aluminum fin of the outdoor unit, be sure to attach a
snow-proof ducting to the unit. It is recommended that
the outdoor unit be located away from the touched with
hands.

2-3. Shield for Horizontal Exhaust Discharge

It is necessary to install an air-discharge chamber (field
supply) to direct exhaust from the fan horizontally if it is
difficult to provide a minimum space of 7 ft. between the
air-discharge outlet and a nearby obstacle. (Fig. 2-4)
In regions with heavy snowfall,
the outdoor unit should be
CAUTION
provided with a solid, raised
platform and snow-proof
ducting (field supply). (Fig. 2-5)

2-4. Installing the Outdoor Unit in Heavy Snow

Areas

In locations where wind-blown snow can be a problem, snow-
proof ducting (field supply) should be fitted to the unit and
direct exposure to the wind should be avoided as much as
possible. (Fig. 2-6) The following problems may occur if proper
countermeasures are not taken:
● The fan in the outdoor unit may stop running, causing the
unit to be damaged.
● There may be no air flow.
● The tubing may freeze and burst.
● The condenser pressure may drop because of strong wind,
and the indoor unit may freeze.

2-5. Precautions When Installing in Heavy Snow

Areas
a) The platform should be higher than the maximum snow
depth. (Fig. 2-5)
b) 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 the outdoor unit.
c) The platform foundation must be solid and the unit must
be secured with anchor bolts.
d) When installing on a roof subject to strong wind,
countermeasures must be taken to prevent the unit from
being overturned.
Fig. 2-4
AVOID
Without snow-
proof ducting
(Without platform)
Fig. 2-5
Fig. 2-6
21
DO
Fallen snow
With snow-
proof ducting
(High platform)