Applications With A Humidifier - Honeywell F300 Product Data

F300 ELECTRONIC AIR CLEANER

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 is discharged from an atom-
izing humidifier can overload the air cleaner, resulting
in hard water salts being deposited as dust in the liv-
ing space.
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 Perfect Window™ Fresh Air
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 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.
The W8600F Air Cleaner Monitor is furnished with all the
connectors needed for easy installation. Follow the installation
instructions provided with the W8600F.
Optional W8600A AIRWATCH™ Indicator
The W8600A can be mounted next to the thermostat or in any
other location in the living area of the home where the display
can be conveniently observed. No wiring is necessary.
68-0240EF-5
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 metal mesh prefilter, media
postfilter 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 is
between 40° to 125°F (4° to 52°C).
IMPORTANT
UV light can damage media postfilters. Avoid
installing UV lamp downstream of F300 in location
where UV light illuminates postfilter.
Choose Mounting Position
WARNING
Heavy Equipment Hazard.
Can cause injury or equipment damage.
Do not mount air cleaner with access door facing down
because the latch may not hold and the cell, postfilter
and prefilter can fall unexpectedly.
NOTE: Nothing holds the cell, postfilter, and prefilter in place
when the access door is opened.
The air cleaner can be mounted in any position except with the
access door facing down. A list of air cleaner mounting
positions for a variety of furnace installations follows.
NOTE: At least 13 in. (330 mm) clearance is required
between the access door and any obstructions for
cell, postfilter and prefilter maintenance.
— Upflow Highboy furnace: Side installation; air cleaner is
mounted vertically where return enters side inlet of furnace.
See Fig. 3A.
— Upflow 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. See Fig. 3B.
— Upflow Highboy furnace: Closet installation. Air cleaner is
mounted vertically on furnace between furnace and
louvered return air opening in closet door. See Fig. 3C.
— Lowboy furnace: Air cleaner is mounted horizontally in
return plenum just above furnace, opposite of supply
plenum. See Fig. 3D.
— Downflow Counterflow furnace: Air cleaner is mounted
horizontally in return duct or plenum just above furnace.
See Fig. 3E.
— High capacity system: Two or more air cleaners can be
used together. See Fig. 3F.
— Horizontal furnace: Air cleaner is mounted vertically where
return enters. See Fig. 3G.
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