MOUNTING
STEP FOUR: Install Turning Vanes
Install turning vanes to help distribute air equally over the full
surface of the upstream side of the air cleaner. Install them
whenever an abrupt 90 degree elbow is installed directly against
the Electronic Air Cleaner cabinet.
STEP FIVE: Fasten Cabinet to Ductwork
Fasten side of cabinet to the ductwork using sheet-metal screws,
rivets, or slip joints, as appropriate.
STEP SIX: Connect Ductwork
a. Connect the vertical duct section to the elbow. If the vertical
drop of the duct is less than 7 in. (178 mm) from the side of
the furnace, shorten the horizontal trunk or attach an offset
fitting to the elbow. See figure to the right.
b. When ductwork is properly aligned, connect the vertical duct
to the horizontal trunk.
STEP SEVEN: Seal Joints
Seal all joints in the return air system between the air cleaner
and the furnace to prevent dust from entering the clean
airstream.
STEP EIGHT: Position Cell Key
The electronic cell must always be installed so the ionizer
section is on the upstream side. A factory-installed cell key on
the bottom of the cabinet allows the cell to be inserted in only
one direction. If the arrow molded into the plastic key points in
the same direction as the airflow, the ionizer is always on the
upstream side.
If position of the key must be reversed, proceed as follows:
a. Remove the electronic cell.
b. Remove the screw holding the cell key in place.
c. Turn the key around and place it over the opposite holes.
The tab on the bottom fits into the larger hole, and the screw
fits into the smaller hole. Make sure the arrow on the key
points in the direction of the air flow (downstream).
d. Tighten the screw into the new hole.
e. Insert the electronic cell. The ionizer section will now be on
the air-entering (upstream) side of the cabinet.
M20815
LOCKING
PLIERS
TURNING
VANES
PREFILTER GUIDES
CELL KEY
M5639
CELL
KEY
ALTERNATE
HOLES FOR
KEY
CELL KEY
SCREW
DOWNSTREAM
AIRFLOW
F300 Elec
t
ronic Air Cleaner 68-0240EF—07
10
68-0240EF_B.indd 10
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