3DJH
SETTING THE UNIT
Heat pump units operate under a wide range of
weather conditions; therefore, several factors must
be considered when positioning the outdoor unit.
Unit must be positioned to give adequate clearances
for sufficient airflow and servicing. A minimum clear-
ance of 36 in. (914 mm) between multiple units must
be maintained. Refer to figure 1 for installation clear-
ances.
INSTALLATION CLEARANCES
FIGURE 1
36
(914 mm)
*36
(914 mm)
36
(914 mm)
NOTE48 inch clearance required on top of unit.
*36
(914 mm)
*NOTEOne side must be 36 inches. Two of the remaining
three sides may be 12 inches.
1- Place a sound-absorbing material, such as Iso-
mode, under the unit if it will be installed in a loca-
tion or position that will transmit sound or vibra-
tion to the living area or adjacent buildings.
2- Mount unit high enough above ground or roof to
allow adequate drainage of defrost water and
prevent ice build-up.
3- In heavy snow areas, do not locate unit where
drifting will occur. The unit base should be ele-
vated above the depth of average snows.
NOTE-Elevation of the unit may be accomplished
by constructing a frame using suitable materials.
If a support frame is constructed, it must not block
drain holes in unit base.
4- When installed in areas where low ambient tem-
peratures exist, locate unit so winter prevailing
winds do not blow directly into outdoor coil.
5- Locate unit away from overhanging roof lines
which would allow water or ice to drop on, or in
front of, coil or into unit.
Slab Mounting--Figure 2
When installing unit at grade level, top of slab should
be high enough above the grade so that water from
higher ground will not collect around unit. See figure
2. Slab should have a slope tolerance away from the
building of 2 degrees or 2 inches per 5 feet (51 mm per
1524 mm). This will prevent ice build-up under the
unit during a defrost cycle. Refer to roof mounting
section for barrier construction if unit must face pre-
vailing winter winds.
FIGURE 2
SLAB MOUNTING AT GROUND LEVEL
DISCHARGE AIR
MOUNTING SLAB MUST SLOPE
AWAY FROM BUILDING.
GROUND LEVEL
STRUCTURE
Roof Mounting--Figure 3
Install unit a minimum of 6 inches (152 mm) above the
roof surface to avoid ice build--up around the unit. Lo-
cate the unit above a load bearing wall or area of the
roof that can adequately support the unit. Consult lo-
cal codes for rooftop applications.
FIGURE 3
WIND BARRIER
INLET AIR
INLET AIR
INLET AIR
INLET AIR
PREVAILING WINTER WINDS
ROOFTOP APPLICATION
WIND BARRIER CONSTRUCTION
