F58F COMMERCIAL DUCT MOUNTED ELECTRONIC AIR CLEANER
68-0141—4
4
PLANNING THE INSTALLATION
Application
The F58F is used in a forced air heating, cooling, or
ventilating system. It removes airborne particles from the air
circulated through it. All models have an internal airflow switch
to operate the F58F when the system blower is on.
Review Installation Requirements
The air cleaner should be installed where all the air passing
through the system circulates through it. The best location is
in the return air duct next to the blower compartment so the
air cleaner can help keep the blower motor and evaporator
coils clean.
IMPORTANT
Do not mount in the discharge air duct.
For most efficient air cleaning, airflow must be spread evenly
across the face of the air cleaner. If the duct is a different size
than the air cleaner cabinet, gradual transitions are
recommended. If the duct turns sharply just before the air
cleaner, turning vanes are recommended.
Applications with Air Conditioning
The air cleaner should be installed upstream from the
evaporator coil. The air cleaner will help keep the coil clean,
reducing maintenance.
Applications with a Humidifier
An evaporative humidifier can be mounted upstream from the
air cleaner. An atomizing humidifier should be mounted
downstream from the air cleaner, even though hard water
salts will be blown into the living space and deposited as dust.
If an atomizing humidifier must be mounted upstream from
the air cleaner:
1. Mount it as far as possible upstream from the air
cleaner.
2. Install a standard disposable furnace filter between the
humidifier and the air cleaner to trap water droplets and
hard water salts.
3. Frequently clean the air cleaner to prevent a hard water
salt buildup.
NOTE: The volume of water that passes through an
atomizing humidifier can overload the air cleaner,
resulting in hard water salts being deposited as dust
in the living space.
Applications with an Activated Carbon Filter
An activated carbon (charcoal) filter can be used to remove
odors or other gaseous contaminants (not particle-based) that
are not removed by the air cleaner. Locate the carbon filter:
•Downstream from the air cleaner. This means 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.
If necessary, use a disposable furnace filter between the
carbon filter and the electronic cell.
• With proper transitions, if the activated carbon filter
requires a differently sized duct than the air cleaner. Allow
20 degrees expansion per side, per fitting.
NOTE: Honeywell does not offer carbon filters. Refer to an
activated carbon filter manufacturer for sizing and
application.
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 upstream from the air cleaner by:
• Making sure the outdoor intake is far enough upstream
from 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 upstream from the air cleaner to force
thorough air mixing.
• Installing a Honeywell Home Ventilation System that
transfers up to 80 percent of the heat from the exhaust air
to the incoming outside air. This keeps the incoming air
above 40°F (4°C) and reduces energy usage.
• 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.
Optional W8600F Air Cleaner Monitor
The F58F terminal board is recessed slightly so it or the wires
will not interfere with installation. The entire power supply box
can be unplugged and removed to provide access to the
terminals. The W8600F Air Cleaner Monitor can be mounted
in the living area or in the furnace room. It should be located
in a convenient location to observe the display.
Choose F58F 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 prefilter and electronic
cell. Allow enough room above the power supply so it can be
serviced without removing pipes, ducts, or other heating
system components.
The air cleaner must be installed where the temperature will
not exceed 40° to 125°F (4° to 52°C).
Choose Mounting Position
WARNING
Heavy Equipment.
Can cause injury or equipment damage.
Do not mount the air cleaner with the access door
facing down. If the access door faces down, the latch
may not hold, and the cell and prefilter can fall
unexpectedly. Also, nothing holds the cell and prefilter
in place when the access door is opened.
