Honeywell F50E Manual page 5

Applications with an Activated Carbon Filter
If desired, an activated carbon (charcoal) filter can be used to
remove odors or other gaseous contaminants (not particle-
based), which are not removed by the air cleaner. Locate the
carbon filter:
• Downstream from the air cleaner. This means, of course,
that dust from the carbon filter will not be collected by the
air cleaner and will be deposited in the living space.
• Outside the air cleaner cabinet. Some carbon filters are
combustible, and contact with high voltage could result in
smoke or fire.
• Where carbon granules cannot fall into the electronic
cell(s). Use a disposable furnace filter if necessary
between the carbon filter and the electronic cell(s).
• With proper transitions, if the activated carbon filter
requires a different size duct than the air cleaner. Allow
20 degrees expansion per side, per fitting.
Applications with Outdoor Air Intake
Return air temperature must be at least 40°F (4°C). Lower
temperatures can cause ionizer wire failure. If outdoor air is
used, warm it ahead of the air cleaner by:
• Making sure the outdoor intake is far enough ahead of the
air cleaner so the return and outdoor air is thoroughly
mixed. Stratified air can dump a stream of very cold air into
one section of the air cleaner.
• Adding baffles ahead of the air cleaner to force thorough
air mixing.
• Installing a preheater, if large amounts of outdoor air are
used. The preheater, which could be an electric strip
heater or hot water coil, should be controlled by a
thermostat. Hot water or steam coils should be protected
by a freeze-up control.
Choose Location
Choose a location that is readily accessible for regular
inspection and cleaning. Allow at least 13 in. (330 mm) in front
of the access door for removing the prefilters and electronic
cells. Allow enough room above the power supply so the
power supply can be serviced without removing pipes, ducts,
or other heating system components.
The air cleaner must be installed where the temperature will
not exceed the ratings in the SPECIFICATIONS section.
Choose Mounting Position
WARNING
Heavy Equipment.
Can cause injury or equipment damage.
If the access door faces down, the latch may not hold,
and the cells and prefilters can fall unexpectedly. Also,
nothing holds the cells and prefilters in place once the
access door is opened.
The air cleaner can be mounted in any position except with
the access door facing down. Figs. 3-10 show proper air
cleaner mounting with a variety of furnace installations.
F50E DUCT MOUNTED ELECTRONIC AIR CLEANER
Fig. 3. Highboy furnace, side installation,
air cleaner is mounted vertically where
return enters side inlet of furnace.
1 ALLOW AT LEAST 2 IN. (51 MM) BETWEEN TOP
OF POWER BOX NAD ADJACENT WALL.
Fig. 4. Highboy furnace. Installation beneath furnace
(air cleaner cabinet can easily support weight of
furnace and air conditioner coil). Air cleaner is mounted
horizontally where return enters from below.
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M6028A
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M4691
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