F35F Expandapac™ MEDIA AIR CLEANER
68-0178—2
4
Mounting:
Mounts in any position in the return air duct next to the
furnace blower compartment. Airflow must be in the direction
of the arrow on the filter. Cabinet is sturdy enough to support
weight of a residential furnace and evaporator coil.
Underwriters Laboratories, Inc.:
UL 900, Class 2 listed.
Upgrade Path:
The F35 uses the same cabinet as the F50 Electronic Air
Cleaner. Upgrade requires installing the cell key, electronic
cells, protective screens, and power box installation and wiring.
Accessory:
S830A Clogged Filter Indicator.
Replacement Parts:
Replace Expandapac media filter annually or more often if
reduced airflow results in lower heating/cooling equipment
performance. See Replacement Parts section for Media Filter
and Frame/Comb replacement part numbers.
PLANNING THE INSTALLATION
Location
Install the media air cleaner where all the air passing through
the system is circulated through it. The best location is in the
return air duct next to the blower compartment so the media air
filter can help to keep the blower motor and evaporator coils
clean. Do not mount in the supply air duct.
For most efficient air cleaning, spread airflow evenly across
the face of the media. If the duct is a different size than the
media air cleaner cabinet, gradual transitions are required. If
the duct turns sharply just before the air filter, turning vanes
are required (Fig.12).
Choose a location that is readily accessible for checking and
replacing the filter. Allow at least 26 in. (660 mm) clearance in
front of the unit for removal of the filter.
Install the media air cleaner where the temperature will not
exceed the ratings in the Specifications section.
Applications with Air Conditioning
Mount the media air filter upstream of the evaporator coil in a
cooling system. The filter will help to keep the coil clean and
reduce maintenance.
Applications with a Charcoal Filter
Add an activated charcoal filter to the air handling system to
remove gaseous (nonparticulate) contaminants from the
circulated air. A common residential application is to remove
odors that cannot be removed by mechanical air filters. The
activated charcoal filter, if used, should be installed
downstream from the media air cleaner to protect the
charcoal filter from lint and other particles.
Fig. 3. Highboy furnace, with side installation.
Media air cleaner is mounted vertically
where return enters side inlet of furnace.
Fig. 4 Highboy furnace, with installation
beneath furnace. Media air cleaner is mounted
horizontally where return enters from below.
M939A
M940A
Applications with a Humidifier
The media air filter is compatible with humidifiers. Avoid
applications where water mist can reach the media. If an
atomizing humidifier is used, the filter media will require
replacement more often because of minerals in the water.
Choose Mounting Position
The media air cleaner can be mounted in any position, but the
arrow on the cartridge must point in the same direction as the
airflow. See Fig. 3-10 for proper location of the media air
cleaner for a variety of furnace installations. Note that the
media air filter cabinet is sturdy enough to easily support the
weight of the furnace and evaporator coil. See Fig. 4.