Mitsubishi Electric PFAV-P250VM-E Data Book page 68

(4) Weather countermeasure
In cold and/or snowy areas, sufficient countermeasures to wind and snow damages should be taken for
operating unit in normal and good condition in winter time. Even in the other areas, full consideration is
required for installation of unit in order to prevent abnormal operations caused by wind or snow. When
rain and snow directly fall on unit in the case of air-conditioning operations in 10 or less degrees
centigrade outdoor air, mount inlet and outlet ducts on unit for assuring stable operations.
Countermeasure to snow and wind
Prevention the Outdoor unit from wind and snow damages in cold or snowy areas, snow hood shown
below is recommended and helpful.
• Snow hood
750
A
(760)
760
<Side view>
Outlet
A
Note:
1. Height of frame base for snow damage prevention (H) shall be twice as high as expected snowfall.
Width of frame base shall not exceed that of the unit. The frame base shall be made of angle steel,
etc., and designed so that snow and wind slip through the structure. (If frame base is too wide, snow
will be accumulated on it.)
2. Install unit so that wind will not directly lash against openings of inlet and outlet
ducts.
3. Build frame base at customer referring to this figure.
Material :Galvanized steel plate 1.2T
Painting :Overall painting with polyester powder
Color :Munsell 5Y8/1 (same as that of unit)
4. To install units side by side,install a filler plate between the fan guard and the
outlet-side snow food as shown in Figure A.
(The filler plate provided accommodates the installation pitch of between 30-80
mm.)
5. When the unit is used in a cold region and the heating operation is continuously performed for a long
time when the outside air temperature is below freezing, install a heater to the unit base or take other
appropriate measures to prevent water from freezing on the base.
B
B
453
453
<Front view>
Inlet
B
906
(920)
B
910 453
66
1206
(1220)
B
453 1210
<Front view>
Figure A
B
453
Filler plate