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F50E DUCT MOUNTED ELECTRONIC AIR CLEANER
68-0072—5
4
M4697
UNIT SIZE
IN.
16 X 25
20 X 25
MM
406 X 635
508 X 635
DIM. A
17-3/4
21-3/4
450
553
DIM. B
14-3/8
18-3/8
365
467
10-7/16
10-7/16
DIM. C
265
265
DIM. D
23-1/4
23-1/4
591
591
DIM. D (SEE TABLE)
DIM. E (SEE TABLE)
DIM. B
(SEE TABLE)
DIM. A
(SEE TABLE)
DIM. C
(SEE TABLE)
IN. MM IN. MM
IN. MM IN. MM
DIM. E
25-1/2
25-1/2
648
648
IN. MM
6-3/4 (171)
1-1/8
(29)
15/16
(24)
5/8
(16)
7/8
(22)
5-9/16
(142)
3-3/4
(95)
1 JUNCTION BOX AND POWER SUPPLY CAN BE REMOTE-MOUNTED USING 136377A REMOTE MOUNT KIT.
1
Fig. 2. Installation dimensions in in. (mm in brackets) of 2-cell electronic air cleaner.
PLANNING THE INSTALLATION
Application
The F50E is used in a forced air heating, cooling, or
ventilating system. It operates when the system blower is on.
Models with internal solid state air flow switch require only
line voltage connection. Models without the air flow switch can
be energized through the fan switch, a dpdt fan relay or an air
flow switch such as the S688 Sail Switch. Unless the F50E
with solid state air flow switch is used, an isolating fan relay or
air flow switch is required if the system has a multispeed or
modulating blower motor.
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. 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 of the
evaporator coil. The air cleaner helps keep the coil clean,
reducing maintenance. Also, if the air cleaner is downstream,
the high relative humidity of the cooled air leaving the
evaporator coil can cause water condensation on the cells,
reducing air cleaner efficiency.
Applications with a Humidifier
An evaporative humidifier can be mounted upstream of the air
cleaner. An atomizing humidifier should be mounted
downstream of 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 of the air
cleaner:
1. Mount it as far as possible upstream of 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. Clean the air cleaner frequently to prevent a hard water
salt buildup.
4. Note that 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.