Aprilaire 4838 Owner's Manual

Air Cleaner Control

Model 4838

Owner’s Manual

Fits Air Cleaner Models 2120, 2140, 2200, 2400 & 5000

OPERATION

The exclusive Aprilaire Air Cleaner Control (see Figure 1) is installed by your contractor at a location that is convenient for you.
It may be located next to your thermostat, on the air cleaner or near your heating and cooling equipment.

1

Filtering

When the air cleaner is cleaning the air, either at your
command or when the heating and cooling system is operating,
bars on the display will sequence on and off to let you know
that it is working

2

Filter Life Indicator

This area of the display indicates filter usage. Bars will build
indicating usage increments of 20%, based on how the Air
Cleaner Control was set up. When all bars are filled and begin
to flash, it is time to change the filter. See the Maintenance
section on pages 2-3 for more details.

FIGURE 1

1

4

2

3

3

Active Cleaning

Four selections are available to choose the Air Cleaner Control
option that is best for you, beyond the cleaning that occurs
whenever your equipment is heating or cooling.

4

Display Backlight

An Air Cleaner Control hard wired to the HVAC system power will result in the display backlight being lit 100% of the time. If the
Air Cleaner Control is powered by batteries, the backlight will come on for ten seconds when a button is pushed.

2

90-1339

OPERATION (CONTINUED)

ACTIVE CLEANING OPTIONS

To select any of the options below, simply press the corresponding button, and an arrow will appear next to the button indicating
which option has been selected. To cancel a selection, simply press the button again.

Constant Cleaning:
This option will provide the maximum amount of air cleaning
available. The air cleaner will be active for 24 hours a day,
seven days a week.

Automatic (30 min./hr):

The air cleaner will run a minimum of 30 minutes every hour.
The Air Cleaner Conrol will monitor the amount of time your
heating and cooling system runs; if 30 minutes is not reached
the Air Cleaner Control will automatically turn on the air cleaner.
This will maximize the amount of air cleaning while minimizing
energy consumption.

MAINTENANCE

FILTER LIFE INDICATOR – SETTING THE REPLACEMENT FREQUENCY

Bars are added to the filter life indicator section of the display
in increments until it is time to change the filter, at which time
all the bars will flash. Your filter will generally last a year, but
this depends on a number of factors including your environment,
construction details, pets, how often you run your air cleaner
and of course personal choice. Because the life of the filter is
dependent on so many factors, the amount of time between
filter changes is selectable.

Event Clean (3 hour cycle):

When selected, the air cleaner will run for 3 hours
continuously and then turn off. This option only cleans the air
when needed; an example would be after vacuuming.

Allergies (24 hour cycle):

When seasonal allergies spike and outside air quality is
at its worst, choose this option. Your air cleaner will run
continuously for 24 hours, then turn off.

FIGURE 2

To change the setting (see Figure 2):

1. Remove the front of the Air Cleaner Control from the base.

2. Move the jumper to the desired position.

3. Replace the front of the Air Cleaner Control on to the base.

2

Jumper

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