Placement Considerations; Direct Sunlight, Rain And Ice Protection - Lennox MHB Series Installation, Instruction And Service Manual

Placement Considerations

Consider the following when positioning the unit:
• In coastal areas or other places with salty atmosphere
of sulfate gas, corrosion may shorten the life of the
unit. In coastal areas, the coil should be cleaned with
potable water several times per year to avoid corro­
sive buildup (salt).
• Some localities are adopting sound ordinances based
on the unit's sound level registered from the adja­
cent property, not from the property where the unit is
installed. Install the unit as far as possible from the
property line.
• When possible, do not install the unit directly outside
a window. Glass has a very high level of sound trans­
mission.
• Install unit level.
Ground
Level
Figure 17. Install Unit Level
• Choose a place solid enough to bear the weight and
vibration of the unit, where the operation noise will not
be amplified.
• Choose a location where the hot air discharged from
the unit or the operation noise will not be a nuisance
to neighbors.
• Avoid installing the outdoor unit near a bedroom or
other places where noise may cause a problem.
• There must be sufficient space to carry the unit into
and out of the site.
• There must be unobstructed air flow around the air
inlet and the air outlet.
• The unit must not be installed in areas where a flam­
mable gas leak may occur.
• Install the outdoor unit a minimum of 3 feet (1m) away
from any antenna, power cord (line), radio, telephone,
security system, or intercom. Electrical interference
and radio frequencies from any of these sources may
affect operation.
• Since water drains from the outdoor unit during vari­
ous stages of operation, do not place anything which
may be damaged by moisture under the unit.

Direct Sunlight, Rain and Ice Protection

• If the outdoor unit is subjected to prolong exposure to
direct sunlight with temperatures over 100°F (38°C) a
canopy is recommended as illustrated in "Figure 18.
Outdoor Unit on Pedestal and Protective Canopy"or
"Figure 19. Dog House­Style Shelter".
Building Structure
Protective canopy
Air Outlet
Pedestal
(stand)
Side View
Figure 18. Outdoor Unit on Pedestal and Protective
24 in
610 mm
12 in
305 mm
NOTE - Minimum clearances shown.
Figure 19. Dog House-Style Shelter
12 in
305 mm
NOTE - Minimum clearances shown.
Figure 20. Unit installed in Alcove
IMPORTANT
The construction of a canopy or shade is necessary
because of an ambient limit control set to 122°F (50°C)
to protect the electronics. If the outdoor unit is placed in
direct sunlight it is possible that the limit may activate
and shut down the unit.
• Place unit away from overhanging roof lines which
would allow water or ice to drop on, or in front of, coil
or into unit. Construct a canopy as illustrated in "Fig­
ure 18. Outdoor Unit on Pedestal and Protective Can­
opy".
• The unit base should be elevated above the depth of
average snows as illustrated in "Figure 21. Outdoor
Unit on Brackets above Snow Line" on page 10.
9
Protective canopy
24 in
610 mm
12 in
305 mm
Air Inlet
Pedestal
(stand)
Front View
Canopy
24 in
610 mm
12 in
305 mm
24 in
610 mm
12 in
305 mm
24 in
610 mm