Page 4
4 − When you install the unit in areas where low ambient
temperatures exist, locate the unit so winter prevailing
winds do not blow directly into outdoor coil.
5 − Locate the unit away from overhanging roof lines
which would allow water or ice to drop on, or in front of,
the coil or into the unit.
Slab Mounting
When installing the unit at grade level, the top of the slab
should be high enough above the grade so that water from
higher ground will not collect around the unit. See figure 3.
The slab should have a slope tolerance away from the
building of 2 degrees or 2 inches per 5 feet (51 mm per 1.5
m). This will prevent ice from building up under the unit dur-
ing a defrost cycle. Refer to the roof mounting section for
barrier construction if the unit must face prevailing winter
winds.
2 degrees or
2 in. per 5 foot
(51 mm per 1.5 m)
slope tolerance away
from building structure
Slab Mounting
ground level
mounting
slab
building
structure
discharge air
Figure 3
Roof Mounting
If you are unable to mount the unit coil away from prevailing
winter winds, construct a wind barrier. See figure 4. Size
the barrier at least the same height and width as the out-
door unit. Mount the barrier 24 inches (610 mm) from the
sides of the unit in the direction of prevailing winds.
WIND BARRIER
INLET AIR
PREVAILING WINTER WINDS
Rooftop Application
Wind Barrier Construction
INLET AIR
INLET
AIR
Figure 4
24 in.
(610 mm)
Electrical
In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC).
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
