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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.
√ It is recommended that the heating area should be
calculated and a system of the proper capacity selected.
√ 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 duct system is appropriate for the air handler
being installed. Please note that when replacing an
existing system with lower air-flow, the duct system
may require modification.
Locating the Air Handler
• Survey the job site to determine the best location for
mounting 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 listed in Table 1. Physical
dimensions for this air handler are also shown in Figure
9 (page 13).
• This unit should be located with consideration of
minimizing the length of the supply and return ducts.
Refer to the rating plate or Tables 6, 7a & 7b (page 14)
for proper circulating airflow data.
INStALLAtIoN cLEARANcES
Left Side ......... 0 Inches Right Side ...... 0 Inches
Back ............... 0 Inches
LEFT
SIDE
†
Closet or Alcove Installations:
• Allow 24 in. minimum clearance from front of unit to nearest wall
or partition for servicing. Recommended clearance is 36 in.
• A return air grill should be installed in the door or a partially louvered
door across the opening for proper air circulation. Provide at least
2
235 in
free opening for return air for B-cabinet models and 300
in
2
for C-cabinet models. A fully louvered closet door is strongly
recommended for both installation types.
table 1. Minimum unit clearances
4
†
Front ...........
See Notes
REAR
RIGHT
SIDE
FRONT
NotES:
Minimum clearances
• This appliance must be installed in accordance with
clearances listed in Table 1. The air handler must be
installed with ample clearance for easy access to the
air filter, blower assembly, heater assembly, controls,
and vent connections.
• Static pressure drop through louvered openings and
through return air plenums should be considered in
the overall duct design in the determination of the total
external static pressure.
• All electric heater kits less than 20 kw are approved
for use in air handler installations with zero-clearance
to combustibles at any blower speed. For upflow
configuration, B6 electric furnace equipped with 20 kw
electric heater kits are approved for installation with
zero clearance to combustibles at any blower speed.
Plenums & Air Ducts
WARNING:
All return ducts must be secured to the air
handler using appropriate methods. All return
ducts must be adequately sealed. When return
air is provided through the bottom of the unit,
the joint between the air handler and the return
air plenum must be air tight.
Return air and circulating air ducts must not be
connected to any other heat producing device
such as a fireplace insert, stove, etc. this may
result in fire, explosion, carbon monoxide
poisoning, personal injury, or property damage.
• Plenums and air ducts should be installed in
accordance with the standards of the National Fire
Protection Association Standard for Installation of
Air Conditioning Systems (NFPA 90A), Standard for
Installation of Residence Type Warm Air Heating
and Air Conditioning Systems (NFPA 90B), and all
applicable local codes. NFPA publications are available
by writing to: National Fire Protection Association,
Batterymarch Park, Quincy, ME 02269 or visit
www.NFPA.org online.
• Design the duct work according to methods described
by the Air Conditioning Contractors of America (ACCA).
Air ducts must be aluminum, tin plate, galvanized sheet
steel, or other approved materials for outlet or return
air ducts. Snap-Lock or Pittsburgh-Lock seams are
preferred. All other types of seams must be made tight
to prevent leakage.
• GAS PIPING MUST NOT RUN IN OR THROUGH ANY
OF THE AIR DUCT SYSTEM.
• This unit is designed only for use with a return and
supply duct. The ducts should be appropriately sized
to the capacity of the air handler to ensure its proper
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