8
Installation
It is important to locate the unit where it can be accessed
for service in the future. Refer to unit dimensions on Page
3 for exact locations of suspension brackets, return air
and supply air openings.
•
Make sure that the structural ceiling is able to support
the weight of the indoor unit. It may be necessary to
add extra support.
• Install suspension rods in the structural ceiling or
concrete slab in a suitable location.
• If the structural ceiling is constructed of concrete,
install anchors to accept four ⅜” threaded rods to
suspend the indoor unit. If the structural ceiling
includes wooden joists, use angle iron or Unistrut
channel fixed securely in place to accept the ⅜”
threaded rods. See Figure 3.
• Use either a mechanical lifting device or a minimum of
two people to raise the unit.
•
If necessary, install a field-provided isolation grommet
to prevent transmission of vibration from unit to
structural ceiling.
• If the unit is being installed in an application that
includes a sheet rock (plasterboard) ceiling, a
requirement for the warranty program is that it is
installed with an access panel in a suitable location
to allow final connection of the refrigerant piping,
condensate line and electrical connections. This will
also allow access for future maintenance.
• For ease of installation, it is best to make any
necessary coil configuration changes before setting
the air handler in place.
Anchor
CONCRETE CEILING
USING ANCHORS
ANGLE IRON
ACROSS
WOODEN JOISTS
Threaded rod
Angle iron bolted
in place across
wooden joists
Wooden joist
Threaded rod
Figure 3. Locate Threaded Rods
Position the Unit
DANGER
Units must not be installed where they may be exposed
to potentially explosive or flammable atmosphere. If this
instruction is not followed
exactly, a fire or explosion may result, causing property
damage, injury, or death.
Install the unit in a location that meets the following
requirements:
• Allow adequate space for installation, service
clearance, piping and electrical connections, and
necessary ductwork. For specific unit dimensions,
allow clearance according to local and national
codes.
•
Unit can be installed standing vertically on a field-
provided stand. A stand is always required to support
the weight of the unit.
• Unit can also be installed horizontally, either resting
on a field-provided stand or suspended from the
ceiling. If suspended, confirm that the ceiling is able
to support the weight of the unit.
•
If the unit is to be installed over a finished ceiling
and/or living area, building codes may require a
field-supplied secondary condensate drain pan to be
installed under the entire unit. Consult local codes
inspector for additional information. See Figure 5.
• Select the unit position with the following points in
mind:
• The unit should be installed on a structure that
is suitable to support the total weight of the unit,
refrigerant piping and condensate.
• Proper access should be provided for maintenance
for refrigerant piping, electronic expansion valve
(EEV), electrical box, and condensate pump. See
the Clearances section for minimum clearances all
around the unit.
• The unit should not be positioned close to a wall
or similar obstruction, or in a position where the
discharge air could blow directly on the controller.
• The unit should not be positioned directly above any
obstruction.
•
Make sure the unit is sloped (similar to the slope
shown in Figure 14) (horizontal or vertical) so that
the drain pan will empty completely without water
standing in the pan.
•
The condensate drain should have sufficient
downward slope (1 in. per 100 in.) in any horizontal
run between unit and drain.
IMPORTANT
If installed on the ceiling, be sure that the ceiling grid is
supported separately from the unit. The ceiling grid must
not be supported by any part of the unit, grille, or any
associated wiring or piping work.
