Page 1
70
72
HEATING
Thermostats
OWNER’S MANUAL
Model S86N MU
Multi-Stage Universal Thermostat
Model S86N MUPR
Multi-Stage Universal Thermostat with IAQ
READ AND SAVE THESE INSTRUCTIONS
Page 2
TABLE OF CONTENTS
ABOUT YOUR NEW THERMOSTAT
ABOUT YOUR NEW THERMOSTAT. . . . . . . . . . . . . . . 3
Thermostat Features . . . . . . . . . . . . . . . . . . . . . . . 3
QUICK REFERENCE TO CONTROLS & DISPLAY. . 4
Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Screen Saver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Select System Mode
(Em Heat / Heat / Cool / Auto / Off) . . . . . . . 7
Change Temperature Setting. . . . . . . . . . . . . . 8
Select Fan Setting
(Auto / On / Circulate). . . . . . . . . . . . . . . . . . . . . . 9
Maintenance Reminders. . . . . . . . . . . . . . . . . . 10
Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INDOOR AIR QUALITY FUNCTIONS . . . . . . . . . . . . . 11
Event-Based™ Air Cleaning . . . . . . . . . . . . . . . . 11
Humidier Control . . . . . . . . . . . . . . . . . . . . . . . . . 13
Automatic Mode . . . . . . . . . . . . . . . . . . . . . . . 14
Manual Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Dehumidier Control . . . . . . . . . . . . . . . . . . . . . . 16
If Dehumidication is done
with the Air Conditioner. . . . . . . . . . . . . . . . .17
Fresh Air Ventilation. . . . . . . . . . . . . . . . . . . . . . . . 18
PROGRAM SCHEDULE AND HOLDS . . . . . . . . . . . . 20
Set Time and Date. . . . . . . . . . . . . . . . . . . . . . . . .20
Understanding Program Schedules . . . . . . 21
Progressive Recovery. . . . . . . . . . . . . . . . . . . . . . 22
How to Modify Program Schedules . . . . . . .23
Heat Blast®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Program Schedule Holds. . . . . . . . . . . . . . . . . .26
Temporary Hold . . . . . . . . . . . . . . . . . . . . . . . .26
Vacation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
SETUP MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
User System Settings Table . . . . . . . . . . . . . . . 27
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . .28
THERMOS TAT F EATURE S
• Indoor air quality control (S86N MUPR only).
NOTE: Only one of the following IAQ
accessories can be controlled per
installation:
− Humidier, automatic or manual control.
− Dehumidier.
− Ventilation, with temperature and
humidity limits.
• Heat Blast® raises the room temperature
3°F to 5°F.
• Easy to read, color display.
• 7 day programmability.
• Displays room temperature, room
humidity, temperature setting, and outdoor
temperature.
• Air lter, humidier, dehumidier, and HVAC
service reminders.
• Programmable fan control with fan
circulation mode.
• Easy to use temperature control can
override program schedule at any time.
• Progressive recovery ensures proper
temperature at the start of a program
event.
• Sensor averaging and the ability to assign
a sensor to a schedule event.
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Page 3
HOME SCREEN
70
72
HEATING
HOLD 5:00
PM
Main Menu
Mode
Fan
Schedule
Hold
Heat Blast
Main Menu
Mode
Fan
Schedule
Hold
Heat Blast
Humidifier
Ventilation
Dehumidifier
Air Cleaning
Vacation
Settings
QUICK REFERENCE TO CONTROLS & DISPLAY
MAIN MENU
EQUIPMENT
STATUS
ROOM
TEMPERATURE
ROOM
TEMPERATURE
SETTING
UP ARROW
BACK
SELECT (OPENS
MENU FROM
HOME SCREEN)
DOWN ARROW
Item availability based
on installed options and
thermostat model.
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Page 4
Main Menu
Mode
Fan
Schedule
Hold
Heat Blast
Mode
Heat
Cool
Auto
Off
Em Heat
SCREEN SAVER
70
11:11 AM
84°
55%
Indoor RH
Outside
2
44135
3
Starts 45 seconds after inactivity, press any button to wake the screen.
OPERATION
SELECT SYSTEM MODE
(EM HEAT / HEAT / COOL / AUTO / OFF)
CURRENT TIME
ROOM
TEMPERATURE
INDOOR RH%
(EXCEPT S86N MU)
OUTDOOR
TEMPERATURE
1. Press SELECT to enter Main Menu.
2. Use
or to select the Mode option.
3. Press SELECT to enter Mode menu:
4. Use
or to select the desired mode.
Heat: Thermostat controls only the heating system.
Cool: Thermostat controls only the cooling system.
Auto: (if enabled in installer setup) Thermostat
automatically selects heating or cooling
depending on the indoor temperature.
Emergency Heat: (only for heat pumps with
auxiliary heat) Thermostat controls auxiliary heat.
Heat pump will not operate in Em Heat mode.
Off: Heating and cooling systems are off.
5. Press SELECT to save the mode and return to the
home screen, or BACK to exit without saving.
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Page 5
CHANGE TEMPERATURE SETTING
72
70
SET TEMP
70
72
HEATING
Main Menu
Mode
Fan
Schedule
Hold
Heat Blast
On
Auto
Circulate
Fan
123
2
4
133
5
4
SELECT FAN SETTING (AUTO / ON / CIRCULATE)
1. From the Home screen press or to
adjust the current temperature setting.
2. The temperature setting will enlarge during
adjustment.
3. The temperature setting will take effect 3
seconds after the last adjustment or press
SELECT to save and return to the home screen.
See HOW TO MODIFY PROGRAM SCHEDULES on
pages 23-24 for more information.
When the fan mode is changed during a program
event, it remains in that mode until the next event
starts. The fan must be programmed to Fan On in
the schedule to run continuously through all events.
1. Press SELECT to enter Main Menu.
2. Use
or to select the Fan option.
3. Press SELECT to enter Fan menu:
4. Use
or to select the desired fan mode.
On: Fan runs continuously. Use this mode for
maximum air circulation/ltering.
Auto: Fan runs only when the heating or cooling
system is on.
Circulate: Same as Auto, but ensures the fan
is on for at least 30 minutes per hour. Use this
mode for a balance of energy savings and air
circulation/cleaning.
5. Press SELECT to save the fan mode and return to
the home screen, or BACK to exit without saving.
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MAINTENANCE REMINDERS
Main Menu
Ventilation
Dehumidifier
Air Cleaning
Vacation
Settings
Air Cleaning
3 Hrs
24 Hrs
Mode
2
1
Maintenance reminders are set up by the installer to indicate when the equipment is due for
service. If a maintenance reminder is displayed, call your HVAC dealer for service. They can be
reset by selecting the Reset option on the reminder message or in the Reset Service Reminders
option found in the Settings menu.
LOCKOUT
The user can disable access to the thermostat’s features. (See USER SYSTEM SETTINGS TABLE on
page 27 for details.) This feature can be overridden by pressing and holding the SELECT button
for 7 seconds.
INDOOR AIR QUALITY FUNCTIONS
EVENT-BASED™ AIR CLEANING (IF INSTALLED)
1. Select Air Cleaning from the Main Menu. Air Cleaning
has two temporary events and three persistent modes
that can be set. Air cleaning will activate the fan for
the purpose of air cleaning.
2. Events (temporary)
3 Hrs: When selected, the air cleaner will run for 3 hours
continuously and then return to the most recent mode
of Auto, Continuous, or Off. This option only cleans
the air when needed; an example would be after
vacuuming.
24 Hrs: 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 Auto, Continuous, or Off.
NOTE: The thermostat will manage fan and air cleaning
selections when the selections overlap.
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3. Modes (persistent)
Air Cleaning
3 Hrs
24 Hrs
Mode
Auto
Continuous
Off
Mode
Main Menu
Schedule
Heat Blast
Humidifier
Ventilation
Dehumidifier
Indoor RH 30%
Humidifier
Off
Hum Setting
-
Indoor RH 30%
Humidifier
On
Hum Setting
4
Indoor RH 30%
Humidifier
On
Setting
55%
3
3
2
13a3b
Auto: 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.
Continuous: 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.
Off: The air cleaner will not run the fan
for the sole 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.
HUMIDIFIER CONTROL (S86N MUPR ONLY, IF INSTALLED)
The thermostat can be
congured, through the
Installer set-up, to control
a humidier and operate it
in one of two modes, either
Automatic or Manual. The
thermostat will allow you
to set a range of humidity
based on an outdoor
temperature reading
(Automatic) or set and hold
a value based on a single
set point (Manual).
1. Select Humidier from
the Main Menu.
2. From this screen you
can select humidity level
adjustment or turning the
control on or off.
3. To determine which mode
the thermostat is set to,
see 3a and 3b at right.
Automatic
Mode
Manual
Mode
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Page 8
AUTOMATIC MODE
SELECT to Save
Humidity Setting
3
Less
Less
More
SELECT to Save
55% RH
RH Settings
1
1
MANUAL MODE
In Automatic Mode, you will receive the optimal amount
of humidity so that your home and its furnishings will
be protected from the potentially damaging effects of
excessive or insufcient humidity during the heating
season. The thermostat automatically adjusts your
home’s relative humidity based on the outdoor
temperature to provide as much humidity as possible
while avoiding window condensation.
The humidity setting needs to be set low initially to
determine the humidity limits of your home. Please
follow these steps when adjusting your thermostat.
1. Adjust the humidity setting to 3, which is within the
low-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 construction.
2. During the coldest days of the rst heating season,
minor adjustments may be necessary. This will depend
on your home’s windows and overall insulation. The
relative humidity in your home will then be accurately
controlled to meet your needs and should not need
any adjustment during future heating seasons.
In Manual Mode, it is important to anticipate drops and
react to increases in outdoor temperature to maintain
as much humidity as possible while avoiding window
condensation.
1. Use TAB LE 1 below to determine the proper relative
humidity setting. Changes may be necessary several
times per day throughout the heating season.
TAB LE 1 – RECOMMENDED RELATIVE HUMIDITY
Outdoor Temperature Indoor Relative Humidity
+50°F 50%
+40°F 45%
+30° F 40%
+20°F 35%
+10°F 30%
0°F 25%
-10°F 20%
-20°F 15%
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DEHUMIDIFIER CONTROL (S86N MUPR ONLY, IF INSTALLED)
Indoor RH 30%
Dehumidifier
On
Setting
60%
1
The thermostat can be congured, through the installer
set-up, to control dehumidication with either a whole
home dehumidier or with the air conditioner (cooling unit).
The thermostat will allow you to set the desired humidity
(% relative humidity) level in your home and can be used to
turn the dehumidication On or Off.
1. Use the dehumidication adjustment to set the
dehumidication setpoint to 60% when rst installed. Allow
dehumidication to run until the initial setpoint is reached,
before deciding if you want to change the humidity setting.
Raise the setting if you prefer the air to be less dry; this will reduce the amount of time that
dehumidication runs.
Lower the setting if you prefer the air to be more dry; this will increase the amount of time
that dehumidication runs.
Your comfort is the best measure of how to adjust your setting. When rst installed, your
dehumidier has to remove all the moisture that is initially in your home. The home acts like
a sponge so the moisture in the materials of your home is at the same level as the air. After
drying the air, the materials of the home will release the moisture back into the air until they are
again at the same level. As a result, it is not uncommon for dehumidication to operate for an
extended period of time when it is rst installed.
IF DEHUMIDIFICATION IS DONE WITH THE AIR CONDITIONER
The thermostat will cool up to 3°F beyond the cooling setpoint for dehumidication.
NOTE: overcooling may not be sufcient to meet the dehumidication setpoint.
ENERGY SAVING TIP #1:
Adjust the setting to be as high as is comfortable to reduce dehumidication run time – if it
feels clammy or smells damp or moldy lower the setting. To save energy, turn the dehumidier
control OFF when you open your windows just as you would with air conditioning.
ENERGY SAVING TIP #2:
If vacating your home for an extended period in the summer, set the relative humidity to 60%
and the cooling set point to the highest level that meets the comfort and safety needs of your
pets and possessions. Consult with professionals to determine the best set point. This will keep
the humidity at a controlled level to help prevent mold while minimizing the amount of the
cooling energy used. Vacation hold is a convenient way to adjust the dehumidication and
cooling setpoint when you will be away. See page 26.
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FRESH AIR VENTILATION (S86N MUPR ONLY, IF INSTALLED)
Main Menu
Ventilation
Dehumidifier
Air Cleaning
Vacation
Settings
Ventilation
3 Hrs
24 Hrs
Mode
Ventilation
3 Hrs
24 Hrs
Mode
Mode
Auto
Off
2
1
4
3
This thermostat can be congured, through the
Installer set-up, to control fresh air ventilation
based on a predetermined hourly schedule.
You can temporarily override that schedule to
bring in more fresh air, if desired, or even turn it
off if outdoor conditions are poor.
1. Select Ventilation from the Main Menu.
2. From this screen you can select Ventilation
Events or Mode.
Ventilation has two temporary events and two
permanent modes that can be set.
3. Events (temporary)
3 Hours: Ventilation will be constantly
energized for 3 hours and then the fresh air
mode will return to Auto or Off depending
on which mode was most recently active.
This option is used when fresh air is needed.
Example: To dilute unwanted cooking odors.
24 Hours: Ventilation will be constantly
energized for 24 hours and then the fresh air
mode will return to Auto or Off depending on
which mode was most recently active. This
option is used when a large amount of fresh
air is desired. Example: A day with desirable
outdoor conditions.
4. Mode (persistent)
Auto: Ventilation will cycle based on the
parameters set by the installer to meet your
home’s ventilation requirements.
Off: Ventilation will not run.
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PROGRAM SCHEDULE AND HOLDS
Main Menu
Ventilation
Dehumidifier
Air Cleaning
Vacation
Settings
Settings
Wifi
Clock
Display
Date
Scale
1
2
SET TIME AND DATE
1. Select Settings from the Main Menu.
2. From the Settings menu, select Clock the
to set the time, or Date to set the date.
UNDERSTANDING PROGRAM SCHEDULES
The daily schedule is split into four sections:
Wake: Temperature you would prefer to wake up to.
Leave: Temperature when you are away from the house.
Return: Temperature you would prefer to return home to.
Sleep: Temperature you would prefer while sleeping.
The times and temperatures shown in TABL E 2 are the defaults. The start time and temperature
of each section can be changed to t your schedule. We recommend these settings, since they
can reduce your heating/cooling expenses. The fan program is pre-set to Auto for all events.
TAB LE 2 – DEFAULT SCHEDULE
Set Temperature
Event Designator Start Time
FanHeat Cool
Wake 6:00 AM 70°F (21° C) 78°F (25.5° C) Auto
Leave 8:00 AM 62 °F (16. 5° C) 85°F (29.5°C) Auto
Return 5:00 PM 70 °F (21°C) 78 °F (25. 5° C) Auto
Sleep 10:00 PM 62 °F (16. 5° C) 82°F (27. 5°C) Auto
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Main Menu
Mode
Fan
Schedule
Hold
Heat Blast
Next
Cool
70°
Fan
Auto
Start
6:00a
Heat
70°
Wake
All Days
Monday
Tuesday
Weekdays
Weekends
Modify Day
Modify
On
Schedule
PROGRESSIVE RECOVERY
1
432
HOW TO MODIFY PROGRAM SCHEDULES
The Progressive Recovery feature allows Pre-Heating or Pre-Cooling PRIOR to a scheduled
event in order to reach the desired temperature at the start of that scheduled event. EXAMPLE:
According to TAB LE 2 , the Wake time is 6:00 am, the Wake heat set point is 70°F and the Sleep
set point is 62°F. The heat will turn on prior to 6:00 am so that the temperature reaches 70°F by
the time the Wake event begins.
1. From the Schedule option in the
Main Menu, you can turn the
schedule On or Off, and make
changes to the schedule.
Modify: The event start time,
temperature, fan mode, and
controlling sensor (if installed)
can be adjusted for each event
of each day.
On/Off: When the Schedule
is turned Off the thermostat
will continue to control at the
current temperature setting until
adjusted with
and .
2. Select Modify to change default
schedule settings.
3. Select the group of days or day
you would like to modify.
4. Adjust Wake details (Start, Heat,
Cool, Fan, and/or select Next to
proceed.
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Page 13
HEAT BLAST® (IF INSTALLED)
Confirm
Schedule
Change
Cancel
Save & Exit
All Days
Monday
Tuesday
Weekdays
Weekends
Copy Day To...
Save and Exit
Edit More Days
Copied to
All Days
Next
Cool
70°
Fan
Auto
Start
8:00a
Heat
70°
Leave
Next
Cool
70°
Fan
Auto
Start
5:00p
Heat
70°
Return
Next
Cool
70°
Fan
Auto
Start
12:00p
Heat
70°
Sleep
8a8b956
7
5. Adjust Leave details and/or select
Next to proceed.
6. Adjust Return details and/or
select Next to proceed.
7. Adjust Sleep details and/or select
Next to proceed.
8. a) If you modied a group of days
you can Save & Exit back to the
Home screen.
b) Or if you modied a single
day you can copy the settings to
another day or group of days.
9. If you choose to copy, you will
see this conrmation message,
then you can return to the
Modify menu to make changes
to another day by selecting Edit
More Days or return to the Home
screen by selecting Save and Exit.
Heat Blast® will raise the current room temperature 3°F to 5°F based on the installer set-up, and
then resume normal operation.
To activate Heat Blast, select Heat Blast from the Menu, and use the Select button to set the
toggle to ON.
NOTE: Heat Blast button is only available if it is enabled in the Installer Setup and the thermostat
is in Heat or Emergency Heat mode.
To cancel Heat Blast, select Heat Blast from the Menu, and use the Select button to set the
toggle to OFF.
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PROGRAM SCHEDULE HOLDS
70
72
HEATING
HOLD 5:00
PM
TEMPORARY HOLD
Press
or to immediately adjust the temperature
when the schedule is running. This will temporarily hold the
temperature setting until the next scheduled event.
A temporary hold can also be set from the Hold option in the
Menu. The end time of the hold can also be adjusted from here.
The temporary hold can be canceled from the Hold option
in the Menu, or by adjusting the temperature back to the
scheduled temperature.
VACATION
This energy saving feature allows you to suspend the programmed schedule for an extended
period of time. The selected temperature and dehumidication setpoint (optional) will be
maintained until the vacation hold end date and time. Once that date and time are met, the
previously programmed schedule will resume. If you return earlier than expected, turn off the
Vacation hold from the Vacation option in the Menu to resume the programmed schedule.
SETUP MENU
TAB LE 3 – USER SYSTEM SETTINGS TABLE
Clock Set time.
Date Set date.
Display Display can be disabled during sleep for light sensitive locations.
Scale Change temperature scale from Fahrenheit to Celsius.
About Contains thermostat model number and software/hardware version.
Reset
Reminder
Lockout
Reset expired service reminders.
Locks controls to prevent tampering. To temporarily override the lockout press
and hold the Select button for 7 seconds.
2726
Page 15
LIMITED WARRANTY
Your Re search Prod ucts Corpo ration AprilAire® Thermostat is expres sly warranted for ve (5) years from date of insta llation to be free
from defects in materials or workmanship.
Research Products Corporation’s exclusive obligation under this warranty shall be to supply, without charge, a replacement for any
thermo stat which is found to be defective within suc h ve (5) year p eriod and which i s returned, together w ith the date of install ation,
no later than thirty (30) days after said ve (5) year period by you to eithe r your original su pplier or to Research P roducts Corp oration,
Madison, Wisconsin 53701.
THIS WARRANTY SHALL NOT OB LIGATE RESEARCH PRODUCTS CORPORATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN
WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE THERMOSTAT ITSELF.
IMPLI ED WARR ANTIES OF MERCHAN TABIL ITY OF FITNESS FOR A PARTICULAR PU RPOSE SHALL BE L IMITED IN DURATIO N TO THE AF ORESAID FIVE YEAR
PERI OD. RESEARCH PRODUCTS CO RPORATIO N’S LIAB ILITY FO R INCIDEN TAL OR CONSE QUENTIA L DAMAGES, OTH ER THAN DAMAG ES FOR PERSON AL
INJUR IES, RESULTING FR OM ANY BREACH OF THE AFORESAID IMPLIED WARRANTIES OR THE ABOVE LIM ITED WARRANTY IS EXPR ESSLY EXCLUDED.
THIS LIMITED WARRANTY IS VOID IF D EFECT(S) RESULT FROM FAILURE TO HAVE THIS THERMOSTAT INSTALLED BY A QUAL IFIED HEATING AND AIR
CONDITIONIN G CONTR ACTOR. IF TH E LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED CONT RACTOR, ALL DISCLAIMERS OF IMPLIED
WARRANTI ES HALL BE EFFECTIVE UPON INSTALLATION .
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential
damages, so the above exclusions or limitations may not apply to you.
This warranty gives you specic legal rights and you may also have other rights which vary from state to state.
WARRANTY REGISTRATION
Visit us online at www.aprilaire.com to regi ster your Ap rilAire pro duct. If yo u do not have onlin e access , please m ail a postcard wit h your
name, address, phone number, email address, product purchased, model number, date of purchase, and dealer name and address to:
Research Products Corporation, P.O. Box 1467, Madison, WI 53701.
Your warrant y registratio n information wi ll not be sold or shar ed outside of thi s company.
B2208832B • 61001883 • 1. 22
© 2022 AprilAire | aprilaire.com | 800.334.6011
U.S. Pate nt Number s 8,146,376, 8 ,596,078, 9, 874,366 and oth er patents p ending.
AprilAire reserves the right to change specications without notice.
28
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