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For ease in installation, it is best to make any necessary coil
configuration changes before setting the air handler in place. See
"Installation Configuration Options" later in this section.
Vertical Installations
Upflow/Counterflow
The air handler must be supported on the bottom only and set on
a field-supplied supporting frame with an air return opening.
Securely attach the air handler to the supporting frame.
Horizontal Installations
Horizontal installations can be left-hand or right-hand air supply.
The cabinet must be supported by the building structure to
ensure cabinet integrity. Ensure that there is adequate room to
remove the blower access panel if installing in the horizontal
position.
Suspended Cabinet Installation
NOTE: Air handlers cannot be installed in such a way that the
blower access panel is facing up or down.
The suspending means must be field fabricated, and should
consist of two "cradles" made by attaching two rods to a
length of angle iron or equivalent structural steel.
Locate the cradles so that they are as close as possible to the
ends of the air handler (this will provide access for removal of
major components such as the blower assembly).
Provide enough clearance between the suspension rods and
the air handler to allow removal of the blower access panel.
WARNING
Electrical Shock Hazard
Electrically ground air handler.
Connect ground wire to ground terminal marked "GND".
Failure to do so can result in death or electrical shock.
NOTES:
Use copper conductors only.
Installation Configurations
Installation Configuration Options
NOTE: Typical installations with optional WEM modular
evaporator coil are shown.
Right to Left
Electrical Requirements
All field wiring must be done in accordance with National
Electrical Code, applicable requirements of UL and local
codes where applicable.
Electrical wiring, disconnect means and over-current
protection are to be supplied by the installer. Refer to the air
handler rating plate for maximum overcurrent protection,
minimum circuit ampacity, as well as operating voltage.
The power supply must be sized and protected according to
the specifications supplied on the product.
This air handler is factory-configured for 240 Volt, single
phase, 60 cycles. For 208 Volt applications, see "208 Volt
Conversion" in the "Make Electrical Connections" section.
For optional electric heater applications, see "Accessories."
Refer to the instructions provided with the accessory for
proper installation.
Counterflow
Upflow
Airflow
Horizontal
Left to Right
Airflow
3
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