Aprilaire 8570 User manual

Premium Programmable Thermostat
READ AND SAVE THESE INSTRUCTIONS
Owner’s Manual
Model 8570
Includes Operating Instructions
and Warranty Information

TABLE OF CONTENTS
PAGE
ENERGYSTAR®Program Information . . . . . . . . . . . . . . . . . 1
Getting Familiar with your
Aprilaire®8570 Thermostat. . . . . . . . . . . . . . . . . . . . . . 2
Operating Your Thermostat . . . . . . . . . . . . . . . . . . . . . . 4
Setting the Mode of Operation – Heat, Cool, etc. . . . . 5
Temporarily Raising and Lowering
the Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setting the Date and Time . . . . . . . . . . . . . . . . . . . . . . 8
PAGE
Programming your Thermostat . . . . . . . . . . . . . . . . . . . 9
Holding Temperature – Holiday and Permanent . . . . . 11
Settings Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Info Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Viewing Other Thermostats on the System . . . . . . . . 18
In Case of Power Failure . . . . . . . . . . . . . . . . . . . . . . . 19
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

About half of all energy used by households goes to
heating and cooling the home. By selecting a program-
mable Aprilaire®Electronic Thermostat, you have made
a significant step toward conserving energy usage and
costs, while improving your indoor comfort.
In fact, the Aprilaire®Model 8570 Premium Programmable
Thermostat has earned the “ENERGYSTAR®” designation of
the U.S. Environmental Protection Agency (EPA). This
means that your Aprilaire Thermostat is a highly efficient,
cutting edge product that is good for the environment. It
saves energy and costs less to operate than similar
products that do not qualify for the ENERGYSTAR label.
ENERGYSTAR products help you differentiate between
standard efficiency and high efficiency products. By
using ENERGYSTAR products, you are helping to prevent
air pollution while saving money on your utility bills.
According to the EPA, taking advantage of the times that
a home is unoccupied or the occupants are asleep, an
ENERGYSTAR thermostat can reduce heating and cooling
bills by as much as 30%. The Aprilaire Thermostat has
programmable capabilities that allow you full flexibility to
set your heating and cooling systems to meet your comfort
and energy needs. As an ENERGYSTAR partner, Aprilaire has
determined that this product meets the ENERGYSTAR
guidelines for energy efficiency.
Desired Daily
Event Temperature Time
Setting Schedule
Wake Heat = 70° 6:00 am
Cool = 78°
Leave Heat = 62° 8:00 am
Cool = 85°
Return Heat = 70° 5:00 pm
Cool = 78°
Sleep Heat = 62° 10:00 pm
Cool = 82°
ENERGYSTAR®PROGRAM INFORMATION
1

FIGURE 1 – GETTING FAMILIAR WITH YOUR APRILAIRE®8570 THERMOSTAT
EQUIPMENT
STATUS
OUTDOOR
TEMPERATURE
ROOM
TEMPERATURE
MESSAGE
CENTER
SETPOINTS
UP/DOWN BUTTONS
MULTI-FUNCTION
BUTTONS
2

MESSAGE CENTER
Normally this is where you will find the current date and time.
If the thermostat is in a Hold State, the thermostat will display
when the Hold State is scheduled to end. The area is also used
to give information on when you should replace your air filter or
UV lamp, when you should service your humidifier and general
HVAC equipment.
When installed with an Aprilaire®Automatic Humidifier Control
and Humidifier, the message center will also inform you if the
humidifier is operating.
When installed with an Aprilaire®Model 6504 Intelligent Zone
System, more information is displayed in this area. For instance,
if you own an Energy Recovery Ventilator (ERV), or an Electronic
Air Cleaner (EAC) the thermostat will be able to display whether
they are active.
EQUIPMENT STATUS
In this area of the display, the thermostat will show the
equipment’s mode and whether the equipment is active. A typical
message in this area would be HEAT MODE when the equipment
is not running and HEATING when the equipment is active.
OUTDOOR TEMPERATURE
The thermostat has terminals that can be hooked up to an
outdoor temperature sensor. If this is installed, outdoor
temperature will be displayed in this area of the screen.
When installed with an Aprilaire®Automatic Humidifier Control
or an Aprilaire®Model 6504 Intelligent Zone System, this
information is communicated to the thermostat so there is no
need for the extra outdoor temperature sensor.
ROOM TEMPERATURE
The large temperature on the screen is the room temperature.
The scale can be changed from Fahrenheit to Celsius if desired.
SETPOINTS
The setpoints are the temperatures to which the thermostat
is controlling.
MULTI-FUNCTION BUTTONS
The multi-function buttons are used throughout the thermostat
menu system and have many functions. The description on the
screen directly above the button is what that button is used for in
that particular screen. In Figure 1, the left button would be used
for INFO and the right button would be used for MENU.
UP/DOWN BUTTONS
These buttons are used to raise and lower temperature and to
navigate through the thermostat’s menus.
3

OPERATING YOUR THERMOSTAT
Backlight Operation
When any button is pressed, the backlighting will
illuminate. Once the backlight is on, subsequent button
presses will perform their respective tasks.
Using the Up & Down Buttons and Multi-Function
Buttons on the Thermostat
This thermostat uses a menu driven display and four (4)
buttons. The Up and Down buttons are used to move
between selections in the menu and to raise and lower
different parameters such as temperature, days,
minutes etc., depending on which screen you are
viewing. The multi-function buttons have a variety of
uses. The portion of screen directly above these
buttons will display the button’s function. For instance,
when the main screen is being viewed, the buttons are
titled INFO and MENU from left to right respectively.
To access the menu of the thermostat, press the right
multi-function button. From here if you would like to
change the fan operation, press the down button until
the word FAN is highlighted, then press the
multi-function button titled SELECT (right button).
Within this screen, use the up and down button to
highlight the desired fan operation and press SELECT
again and you are done.
Notes on Temperature Adjustments
The Cool setting must always be 2° (F or C) higher than
the Heat setting. The thermostat will automatically
change the temperature setting not being adjusted to
maintain this 2° difference, even if both settings are
not shown on the display.
4

5
1. Setting the Mode of Operation – Heat, Cool, etc.
The thermostat can be set to OFF, HEAT, COOL, AUTO and EMERGENCY HEAT (EMERGENCY HEAT
for heat pumps only) modes. To set the mode, press the MENU button on the main screen.
Once in the Main Menu screen, use the down button to move the highlighted text to MODE.
Press SELECT. Once in the Mode Menu, use the Up/Down Buttons to navigate to the desired mode,
then press SELECT.
Example: Placing thermostat in HEAT MODE.
71˚
INFO MENU
20˚
OUTDOOR
03/31/04 8:32 AM
FAN AUTO
OFF
MAIN MENU
SET DATE AND TIME
HOLD
PROGRAM
FAN
SETTINGS
MODE - HEAT/COOL/ETC.
EXIT SELECT
MODE MENU
OFF
AUTO
COOL
EMERGENCY HEAT
HEAT
BACK SELECT
71˚
INFO MENU
20˚
OUTDOOR
03/31/04 8:32 AM
HEAT 70
SETPOINT
FAN AUTO
HEAT MODE
CAUTION: Do not set to OFF mode during periods when freezing temperatures could occur.
NOTE: When installed with an Aprilaire®Model 6504 you will be given the option to CHANGE ALL
THERMOSTATS. If you select YES to this, the mode setting will be set to whatever you have selected
for all the thermostats on the system.

6
68˚
RESUME
PROG. MENU
20˚
OUTDOOR
HOLD TIL 4:00PM
HEAT 72
SETPOINT
HEATING
FAN ON
68˚
INFO MENU
20˚
OUTDOOR
03/31/04 8:32 AM
HEAT 68
SETPOINT
FAN AUTO
HEAT MODE
72˚
HOLD THIS
TEMPERATURE
UNTIL 4:00PM
HEAT
BACK SAVE
68˚
INFO MENU
20˚
OUTDOOR
03/31/04 8:32 AM
HEAT 68
SETPOINT
FAN AUTO
AUTO MODE
COOL 75 72˚
HOLD THIS
TEMPERATURE
UNTIL 4:00PM
HEAT
BACK
75˚
COOL 68˚
RESUME
PROG. MENU
20˚
OUTDOOR
HOLD TIL 4:00PM
HEATING
FAN ON
HEAT 72
SETPOINT
COOL 75
2. Temporarily Raising and Lowering the Temperature
You can raise or lower the temperature during the current event of the program by simply
pressing the Up/Down buttons.
Example: The Setpoint is at 68°, you want the temperature to be 72°.
If you are in AUTO Mode, both heat and cool settings will be displayed on the hold screen.
First you can change the Heat setting, then the Cool setting. If you do not want to change one
of these settings, simply press select to go to the next setting or to go to the main screen.
The message center displays when the thermostat will return to programmed operation.
Press the RESUME PROG. button to return to programmed operation at any time.

7
3. Fan Operation
The thermostat can operate the fan in 3 ways:
• AUTO (on only during heating and cooling calls)
• ON (always on)
• PROGRAMMED FAN (fan follows the program set in the program screen)
The FAN MENU, located in the MAIN MENU, has these three options for you to choose from.
NOTE: When installed with an Aprilaire®Model 6504 you will be given the option to CHANGE ALL
THERMOSTATS. If you select YES to this, the fan setting will be set to whatever you have selected for
all the thermostats on the system.
MAIN MENU
SET DATE AND TIME
HOLD
PROGRAM
MODE - HEAT/COOL/ETC.
SETTINGS
FAN
EXIT SELECT
FAN MENU
ON
PROGRAMMED FAN
AUTO
BACK SELECT
71˚
INFO MENU
20˚
OUTDOOR
03/31/04 8:32 AM
FAN AUTO
OFF
71˚
INFO MENU
20˚
OUTDOOR
03/31/04 8:32 AM
FAN ON
OFF

8
4. Setting the Date and Time
In the SET DATE AND TIME menu, you can set the correct date and time and activate or deactivate the
automatic Daylight Savings Time Adjustment.
4.1 Automatic Daylight Savings Adjustment
When ‘AUTO DAYLIGHT SAVINGS’ is selected, you have the option of selecting ‘ON’ or ‘OFF’.
When this feature is set to ON, the clock will automatically compensate for Daylight Savings Time.
4.2 Date & Time Screens
When SET DATE and TIME is selected from the Menu, you will be taken through a series of steps to set the
month, day, year, hour and minute. Use the Up/Down buttons to adjust the values.
SET DATE AND TIME
SET DATE / TIME
AUTO DAYLIGHT SAVINGS
BACK SELECT
AUTO DAYLIGHT SAVING
OFF
ON
BACK SELECT
SET MONTH
03/31/04 8:32AM
SET DATE AND TIME
BACK
SET YEAR
03/31/04 8:32AM
SET DATE AND TIME
SET HOUR
03/31/04 8AM :32
SET DATE AND TIME
SET MINUTES
03/31/04 8:32AM
SET DATE AND TIME
SAVE
72˚
INFO MENU
45˚
OUTDOOR
03/31/04 8:32 AM
OFF
SET DAY
03/31/04 8:32AM
SET DATE AND TIME
DONE

9
5. Programming Your Thermostat
5.1 Programming a Day or Series of Days
The PROGRAM MENU is located in the MAIN MENU. After selecting this menu, you have the
option of programming everyday, weekdays, weekends, or individual days. Once you’ve selected
a certain day to program, a screen appears that allows you to set the time, heat setting, cool
setting, and fan operation for each event.
Once you have set the correct times and settings, highlight DONE and
push the SAVE button. The DONE screen will appear to let you know
your changes are saved. You have now programmed your thermostat.
NOTE: The programmed fan operation will only be followed if the
PROGRAMMED FAN option is set in the FAN MENU.
DONE
MAIN MENU
SET DATE AND TIME
HOLD
FAN
MODE - HEAT/COOL/ETC.
SETTINGS
PROGRAM
EXIT SELECT
PROGRAM MENU
DONE
EVERYDAY
WEEKDAYS
WEEKENDS
TUESDAY
MONDAY
MAIN
MENU SELECT
MORE >
MONDAY
COOL
76
85
72
72
6:00A
LEAVE
RETURN
SLEEP
DONE
HEAT
68
62
68
65
8:00A
4:30P
10:00P
FAN
ON
AUTO
ON
AUTO
WAKE
PROGRAM MENU
EVERYDAY
WEEKDAYS
WEEKENDS
MONDAY
TUESDAY
DONE
MAIN
MENU SELECT
MORE >
MONDAYCOOL
76
85
72
72
6:00A
LEAVE
RETURN
SLEEP
HEAT
68
62
68
65
8:00A
4:30P
10:00P
FAN
ON
AUTO
ON
AUTO
CANCEL SAVE
WAKE
DONE
MONDAY
COOL
72
85
UNOCC
DONE
HEAT
68
62
8:00A
5:30P
FAN
AUTO
ON
OCC
MONDAY
COOL
72
85
NIGHT
DONE
HEAT
68
62
8:00A
5:30P
FAN
AUTO
ON
DAY
NOTE: When EVENTS PER DAY are
set to 2-BUSINESS or 2-RESIDENTIAL
(see page 14) the programming
screen will look like above.
2-BUSINESS
2-RESIDENTIAL

10
5.2 Copying a Program from One Day to Another
In the PROGRAM MENU, there is an option to COPY. The option can be used to copy the program
from one day to another day or series of days (i.e. weekdays or weekends). After COPY is
selected, the thermostat will prompt you for which day to copy. Next, it will prompt you for which
day to copy the program to. After selecting this information, it will then confirm what is being
copied to where. At this point you have the option of canceling the copy and not saving or saving
and continuing. After selecting OK, the DONE screen will appear, then it will send you back to
the COPY menu. Selecting DONE here will save your copy and return you to the Main Screen.
The BACK button will also save your copy and return you back to the PROGRAM MENU.
COPY FROM WHICH DAY?
DONE
TUESDAY
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
SUNDAY
MONDAY
BACK SELECT
COPY TO WHICH DAY?
MONDAY
TUESDAY
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
SUNDAY
WEEKENDS
EVERYDAY
WEEKDAYS
BACK SELECT
COPY PROGRAM
FROM MONDAY
TO WEEKDAYS?
CANCEL OK
PROGRAM MENU
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
SUNDAY
COPY
MAIN
MENU SELECT
MORE >
COPY FROM WHICH DAY?
MONDAY
TUESDAY
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
SUNDAY
DONE
BACK SELECT
DONE

6. Holding Temperature
The HOLD MENU, located in the MAIN MENU, allows you to hold a temperature until a set date and time,
as would be done during a holiday, or allows you to hold a temperature permanently.
6.1 Holiday Hold
You can program the thermostat to hold a temperature for a period of time. Whether you want to hold a temperature for a
few hours or for a few weeks, your thermostat can accommodate your schedule. First the thermostat will prompt you for a
temperature to hold. If you are in AUTO MODE you will be prompted for both a heat setting and a cool setting. Next it will
prompt you for a date and time that you wish to return to programmed operation. On the Main Screen, the INFO button
will change to RESUME PROG. If you choose to cancel the hold, simply press this button and the program will resume.
NOTE: When installed with an Aprilaire®Model 6504 you will be given the option to CHANGE ALL
THERMOSTATS. If you select YES to this, the hold setting will be set on all the thermostats on the system,
and pressing the RESUME button returns all thermostats to programmed operation. 11
HOLD MENU
PERMANENT
HOLIDAY
BACK SELECT
72˚
SET HOLD TEMPERATURE
HEAT
BACK SAVE
HOLIDAY HOLD
HOLD UNTIL
MAY 30
4:00PM
BACK SAVE
HOLIDAY HOLD
HOLD UNTIL
MAY 30
4:00PM
CANCEL SAVE
HOLIDAY HOLD
MAIN MENU
SET DATE AND TIME
PROGRAM
FAN
MODE - HEAT/COOL/ETC.
SETTINGS
HOLD
EXIT SELECT
DONE

12
6.2 Permanent Hold
Similar to the Holiday Hold, the thermostat will prompt you to enter the temperature at which you
would like to hold. Once you have selected the temperature, you are returned to the Main Screen.
In order to resume the program, simply press the RESUME PROG. button.
NOTE: When installed with an Aprilaire®Model 6504 you will be given the option to CHANGE ALL
THERMOSTATS. If you select YES to this, the hold setting will be set on all the thermostats on the
system, and pressing the RESUME button returns all thermostats to programmed operation.
74˚
SET HOLD TEMPERATURE
HEAT
CANCEL SAVE
PERMANENT HOLD
74˚
RESUME
PROG. MENU
20˚
OUTDOOR
PERMANENT HOLD
HEAT 74
SETPOINT
HEAT MODE
FAN AUTO
MAIN MENU
SET DATE AND TIME
PROGRAM
FAN
MODE - HEAT/COOL/ETC.
SETTINGS
HOLD
EXIT SELECT
HOLD MENU
HOLIDAY
PERMANENT
BACK SELECT

7. Settings Menu
The SETTINGS menu has many options for you to customize your thermostat.
7.1 Fahrenheit and Celsius
You can change the temperature scale used by the thermostat.
Highlight the scale of your choice and press SELECT.
7.2 12 OR 24 Hour Clock
Within this menu option, you can change the time displayed
by your thermostat to 24 Hour time, (Military Time).
7.3 Display Temperature Setting
If you do not want the temperature setting displayed on the
Main Screen, you can choose to turn it off in this menu.
13
SETTINGS MENU
12 OR 24 HOUR CLOCK
DISPLAY TEMP. SETTING
SET THERMOSTAT NAME
˚F OR ˚C
MAIN
MENU SELECT
MORE >
SETTINGS MENU
EVENTS PER DAY
LOCKOUT OPTIONS
MONITORS
MAIN
MENU SELECT
MORE >
TEMP SCALE
CELSIUS
FAHRENHEIT
BACK SELECT
12 OR 24 HOUR CLOCK
24 HOUR
12 HOUR
BACK SELECT
DISPLAY SETPOINTS
NO
YES
BACK SELECT

14
SET THERMOSTAT NAME
LIVINGROOM
FAMILYROOM
MASTER BEDROOM
BEDROOM
GREAT ROOM
BACK SELECT
MORE >
EVENTS PER DAY
2 - RESIDENTIAL
2 - BUSINESS
4 - RESIDENTIAL
BACK SELECT
LOCKOUT OPTIONS
ALLOW TEMP CONTROL
ALLOW FAN CONTROL
ALLOW TEMP AND FAN
LOCKOUT ALL SETTINGS
BACK SELECT
7.4 Set Thermostat Name
You can give your thermostat a name if you would like. Within this menu, the
thermostat gives you some standard choices. Selecting CUSTOM NAME allows
you to customize the name for your thermostat.
7.5 Events Per Day
This is where you can set the number of events per day. (An event is a period of
time scheduled with a certain heating and cooling setpoint.) For instance if you
are away from your home from 8am to 5pm, make this period of time an event
and set the thermostat at an energy saving setting. You have the option of setting
the events per day to 4-RESIDENTIAL (4 events), 2-RESIDENTIAL (2 events) or
2-BUSINESS (2 events).
7.6 Lockout Options
This menu allows you to enter a pass code to restrict access to changes in the
settings. The thermostat gives you four levels of security:
1. LOCKOUT ALL SETTINGS
2. ALLOW TEMP CONTROL ONLY
3. ALLOW FAN CONTROL ONLY
4. ALLOW TEMP AND FAN CONTROL

UNLOCK CODE
0000
YOUR PASSCODE IS:
CANCEL SAVE
UNLOCK CODE
ENTER FOURTH DIGIT
SAVE
0 0 0 0
UNLOCK CODE
ENTER THIRD DIGIT
0 0 00
UNLOCK CODE
ENTER SECOND DIGIT
00 0 0
UNLOCK CODE
00 0 0
ENTER FIRST DIGIT
BACK
72˚
INFO MENU
20˚
OUTDOOR
LOCKED
OFF
FAN ON
DONE
7.6 Lockout Options (continued)
When any of these options are selected, the thermostat will prompt you for a 4 digit code
to unlock the thermostat. Use the Up/Down buttons to scroll through the numbers (0-9).
Unlocking the Thermostat
When attempting to access a locked setting, the thermostat will prompt you to enter your
four digit code. Once successfully entered, the thermostat will be unlocked. If you forget your
pass code, enter 7777 and press SELECT. 15

16
7.7 Monitors
The MONITORS Menu is where you can set your HVAC service reminders. The items that
the thermostat will remind you of are servicing your air filter, servicing your humidifier,
servicing your UV lamp, and a general service check for your entire system.
NOTE: When installed with an Aprilaire®Model 6504 the monitor settings need only to be
set on one thermostat. The other thermostats in the system will update with the new setting.
NOTE: The ‘AUTO’ option shown above in the SERVICE HUMIDIFIER screen is only available
if installed with an Aprilaire®Automatic Humidifier Control.
MONITORS
SERVICE HUMIDIFIER
UV LAMP
HVAC SERVICE TIMER
AIR FILTER
BACK SELECT
UV LAMP
1 YEAR
OFF
BACK SELECT
AIR FILTER
1 MONTH
3 MONTHS
6 MONTHS
1 YEAR
2 YEARS
OFF
BACK SELECT
SERVICE HUMIDIFIER
AUTO
TWICE / SEASON
ONCE / SEASON
OFF
BACK SELECT
HVAC SERVICE TIMER
1 MONTH
3 MONTHS
6 MONTHS
1 YEAR
2 YEARS
OFF
BACK SELECT

17
8. Info Screen
The Info Screen can be accessed through the Main Screen by pressing the button corresponding
to INFO on the screen. When pushed, the screen will show the outdoor temperature and indoor
relative humidity (when connected to an Aprilaire®Automatic Humidifier Control). Then the
thermostat will display the contact information for your HVAC dealer should you have any
problems or need any supplies.
If there is not an Aprilaire®Automatic Humidifier Control installed, the following screen will be
displayed instead of the temperature and humidity.
BACK
APRILAIRE 8500 PREMIER
THERMOSTAT
CARL'S HVAC
PHONE: [phone]
MESSAGES:
45%68˚
OUTDOOR
TEMPERATURE
INDOOR
HUMIDITY
FRESH IDEAS FOR
INDOOR AIR

18
9. Viewing Other Thermostats on the System
(Model 6504 Installation Only)
If installed with an Aprilaire®Model 6504, you have another option in the MAIN MENU. This option
is to VIEW OTHER THERMOSTATS. When this is selected a list of other thermostats on the system
will be displayed. If you have programmed a name in the THERMOSTAT(S), their respective name(s)
will be displayed. If no names are given, you will see default names such as THERMOSTAT 2.
When viewing other thermostats, you have the option of temporarily changing the temperature
setting or resuming the program. Note that the left multi-function button, says RESUME PROG. at all
times in this screen. This button would be used to resume the program, for the thermostat being
viewed, if it is in hold. Either RESUME PROG. or EXIT returns you to the local thermostat’s screen.
MAIN MENU
SET DATE AND TIME
HOLD
PROGRAM
FAN
MODE - HEAT/COOL/ETC.
SETTINGS
VIEW THERMOSTAT LIST
EXIT SELECT
70˚
EXIT
RESUME
PROG.
20˚
OUTDOOR
THEMROSTAT 2
HEAT 70
SETPOINT
HEAT MODE
FAN ON
VIEW THERMOSTAT LIST
THERMOSTAT 3
THERMOSTAT 4
THERMOSTAT 2
BACK SELECT