12
Air Outlet
Air Inlet
12 in
305 mm
79 in
2007 mm
Figure 17. Outdoor Unit Air Flow Obstructed by
Snow
Figure 18. Avoid Defrost Water Ice Hazard
Prevailing Winds
Normally wind bafes are not required for a outdoor unit.
However, in order to maximize reliability and performance,
the following best practices should be followed.
If unit coil cannot be installed away from prevailing winter
winds, some method of protecting the coil is recommended.
However, minimum clearances as reference in “Figure 4.
Outdoor Unit Clearances - Inches (mm)” on page 7
must be observed at all times.
Common application examples are:
• When prevailing winds are from the air inlet side, then
position the wind barrier a minimum of 12 inches (305
mm) from the unit as illustrated in “Figure 19. Wind
Barrier”
• When prevailing wind is into the discharge side, then
position the wind barrier a minimum 79 inches (2007
mm) from the front of the unit as illustrated in “Figure
19. Wind Barrier”
• Outdoor unit can be installed in a dog house style
shelter as illustrated in “Figure 20. Dog House-Style
Shelter”
• Outdoor unit can be installed in a alcove or under a
roof overhang as illustrated in “Figure 21. Unit installed
in Alcove”
12” (305mm)
Min. Distance
Wind Barrier
Inlet Air
Prevailing Winter Winds from Air Inlet Side
Discharge Air
Wind Barrier
Prevailing Winter Winds From Air Discharge Side
79” (2007mm)
Min. Distance
Figure 19. Wind Barrier
12 in
305 mm
24 in
610 mm
24 in
610 mm
12 in
305 mm
NOTE - Minimum clearances shown.
Figure 20. Dog House-Style Shelter
12 in
305 mm
24 in
610 mm
12 in
305 mm
24 in
610 mm
NOTE - Minimum clearances shown.
Figure 21. Unit installed in Alcove
Buried Refrigerant Pipe Protection
• All refrigerant lines must be insulated regardless of if
it is buried
• In addition to insulating each line of piping, buried lines
must rest inside a sealed, watertight conduit
• The conduit must be designed so it cannot collect and
retain water
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