Power And Battery Replacement; Indoor Air Quality Functions; Event-Based ™ Air Cleaning; Humidifier Control - Aprilaire Control4 User Manual

Indoor Air Quality functions

Power and battery replacement

This thermostat can be AC powered, battery powered, or both
(to provide backup power for communication with the Control4
system). The thermostat uses four alkaline AA batteries.
The thermostat has a memory backup that saves the thermostat
settings in case of a power interruption. The system settings will
be retained, but the clock resets after both battery and AC power
are removed. Clock synchronization comes from the connection
to the Control4 system. To access the batteries for replacement,
remove the bezel as shown.
Indoor Air Quality functions
Event-Based air cleaning
™
If installed, air cleaning can be controlled through the Control4
system. See the Control4 End User Climate Control instructions
for specific instructions on this feature. Note that air cleaning
cannot be controlled directly from the thermostat itself.
Air cleaning will activate the fan for the purpose of air cleaning
and can operate in five different modes as defined on this page.
Off: The air cleaner will not call the fan for the purpose of air
cleaning.
Note: If air cleaning is installed, air cleaning will still
occur during normal fan operation during heating,
cooling or other indoor air quality events.
Constant Clean: 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: The air cleaner will run a minimum of 30 minutes
every hour. The air cleaner will monitor the amount of time your
heating and cooling system runs; if 30 minutes is not reached
the air cleaner will automatically turn on. This will maximize the
amount of air cleaning while minimizing energy consumption.
Event Clean (3 hour cycle): When selected, the air cleaner will run
for 3 hours continuously and then return to the most recent mode
of Off, Automatic, or Constant Clean. 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 return to the most
recent mode of Off, Automatic, or Constant Clean.
Note: The thermostat will manage fan and air cleaning
selections when the selections overlap.
3

Humidifier control

If humidification is installed it can be controlled in two modes,
automatic or manual.
Press button to select Humidify and enter the Humidifier
Control screen.
Automatic or manual mode is configured by the installer. To
determine which mode the thermostat is set to, see the diagrams
on pages 3 and 4.
In automatic mode you will receive the optimum amount of
humidity so that your home and its furnishings are protected
from the damaging effects of excess condensation or low
humidity during heating season. The thermostat automatically
adjusts your home's relative humidity based on the outdoor
temperature.
The humidity setting needs to be set initially to meet your
home's conditions. Follow these steps when adjusting your
thermostat.
1 Adjust the humidity setting to "3" which is within normal
range. During the next 24-48 hours it may be necessary to
adjust the setting for more or less humidity, depending on
your personal comfort and home's requirements.
2 During the coldest portion of the first heating season, minor
adjustments may be necessary. This is dependent upon your
home's construction.
The relative humidity in your home will now be accurately
controlled to meet your needs and should not need further
adjustment during future heating seasons.
Humidifier Control screen for humidification in automatic mode

Automatic mode:

indication of
humidification
setpoint level
Humidifier
adjustment
Humidification
setpoint
Indoor relative
humidity
Done button
(exit Humidifier
Control)