5
Without optional upflow stand
• Install a filter with a minimum unrestricted medium
area of 324 in
2
(2087cm
2
) below the coil cabinet/
Appliance assembly that is accessible for monthly
cleaning or replacement by the homeowner.
With optional upflow stand
• Stand (Figure 1) will use filters provided with the unit.
Remove any filters in the Appliance and follow proper
installation. See instructions supplied with the upflow
stand for additional details.
Ducted Return Air
For ducted systems with air conditioners or heat pumps,
the following optional equipment is recommended: coil
cabinet and upflow duct connector.
• Install a filter with a minimum unrestricted medium
area that meets the application requirements of the
Appliance below the coil cabinet/Appliance assembly
that is accessible for monthly cleaning or replacement
by the homeowner.
24 3/4” (628 mm)
Upflow Stand
20”
(508 mm)
20” (508 mm)
Figure 1. Optional Upflow Stand
Optional Equipment
NOTE: Refer to the instructions supplied with any additional
accessories for further installation details. Ventilaire
attachment locations are indicated in Figure 17 (page 13),
Figure 18 (page 13) & Figure 20 (page 14).
Optional Automatic Furnace Damper
Appliance may be equipped with the optional automatic
damper when a packaged air conditioner is installed and
connected to the warm air duct system. This damper (not
required) prevents cooled air from discharging through
the Appliance cabinet, causing excessive cooling of the
immediate area. Refer to the instructions supplied with
the damper for details.
Duct Connectors for Downflow Systems
Duct connectors are recommended for heated air
distribution in under-the-floor duct systems. With this
system, Appliances may be installed on combustible
flooring without a separate sub-base. The Appliance rear
mounting plate (Figure 5 (page 7)) supplied with the
duct connectors is recommended for use with this type
of installation.
APPLIANCE INSTALLATION
NOTE: Since all installations are different, the sequence of
these steps may differ from the actual installation. These
installation procedures are suggested for typical Appliance
installations. Only qualified HVAC technicians should
install this Appliance.
General Information
This Appliance is designed only for indoor
installations. Units are approved for single/multistory
residential or mobile / modular / manufactured structures
in upflow and downflow (freestanding / closet / alcove)
configurations. This appliance is intended for use at a
maximum altitude of 3048m (10,000ft).
Approved installation, operation, and maintenance of
this appliance must be in accordance with the listed
specifications contained in these instructions and other
documents supplied with the Appliance and/or optional air
conditioning equipment. Unless it is noted differently in this
manual, only use factory authorized kits and accessories
when modifying this appliance. Refer to local authorities
having jurisdiction for further information.
Before You Install this Appliance
√ This equipment is securely packaged at the time of
shipment and upon arrival should be carefully inspected
for damage prior to installing the equipment at the
job site. Claims for damage (apparent or concealed)
should be filed immediately with the carrier.
√ Check the electrical supply and verify the power
supply is adequate for unit operation. The system
must be wired and provided with circuit protection in
accordance with local building codes. If there is any
question concerning the power supply, contact the
local power company.
√ Verify the air delivery of the Appliance is adequate to
handle the static pressure drop of the coil, filter, and
duct work.
Locating the Unit
• Survey the job site to determine the best location for
installing the unit. Consideration should be given to
availability of electric power, service access, and noise.
• The dimensions of the room or alcove must be able
to accommodate the overall size of the unit and
the installation clearances in Table 1 (page 3).
Physical dimensions for this Appliance are shown in
Figure 17 (page 13). If an upflow stand will be used, see
Figure 20 (page 14) for component dimensions.
• The unit must be leveled at installation and attached to
a properly installed duct system.
• The surface that the Appliance is mounted on must
provide sound physical support of the unit.
Locating & Cutting Floor Openings
Floor cut-outs must be carefully located to avoid
misalignment of the Appliance and air duct. Standard
and round cutouts for upflow Appliances are shown in
Figure 2 (page 6). The cutouts for downflow Appliances
are shown in Figure 3 (page 6).
1. Measure and mark the centerline of the cutout. Provide
minimum clearances at rear and right side walls of closet
or alcove for installation of Appliance and wiring.
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