American Standard ACONT800 Series User manual

69-1789-05
OWNER’S GUIDE
ACONT800 Series Touch Screen
Programmable Comfort Control

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Contents
Features ........................................................................................................................................ 3
Home Screen ............................................................................................................................... 4
Programming Your Heating and Cooling Schedule....................................................................... 6
Operating Your Comfort Control.................................................................................................... 16
Replacing Your Batteries............................................................................................................... 23
Cleaning Your Comfort Control Screen ......................................................................................... 28
Reading Your Outdoor Temperature (Select Models).................................................................... 29
Reading Your Remote Indoor Temperature (Select Models)......................................................... 30
Reading Your Inside Humidity Level (Select Models) ................................................................... 34
Controlling Your Inside Dehumidification Setting (Select Models) ................................................ 35
Advanced Settings ........................................................................................................................ 40
Frequently Asked Questions and Answers ................................................................................... 48
Limited Warranty ........................................................................................................................... 49
Customer Assistance .................................................................................................................... 51
IMPORTANT
The comfort control has a touch screen interface. Touch keys appear, as necessary, to
complete tasks. Always press the keys with your fingertips. Sharp instruments like a pen or
pencil point can damage the comfort control.
This thermostat contains a Lithium battery which may contain Perchlorate material. Due to State
Law in California, the following statement is required:
Perchlorate Material—special handling may apply,
See www.dtsc.ca.gov/hazardouswaste/perchlorate

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Features
• Large, Clear Display with Backlighting—current temperature, set temperature and time are
easy to read and all are displayed on the home screen.
• Menu Driven Programming—Guides you through the scheduling process, showing only
necessary information and choices on each screen.
• Ability to Select Multiple Days—allows you to easily customize the comfort control for
your unique schedule.
• Real-Time Clock—keeps time during power failure; automatically updates for daylight
savings.
• Armchair Programming—allows you to remove comfort control from wall to set the
schedule (with three AAA batteries installed).
• Precise Temperature Control (+/- 1°F)—reliable, consistent comfort.
• Multiple HOLD options—allows you to modify schedule indefinitely or for a specific time.
• Change Reminders—reminds you to service or replace the air filter, humidifier pad or
batteries.
• Programmable Fan—increases air quality when combined with a whole-house air cleaner.
• Outdoor Temperature Indication (Select Models)—shows current outdoor temperature on
the display to help you plan outdoor activities.
NOTE: The home screen may differ slightly, depending on the heating and/or cooling system you
have and the comfort control settings for your system type.

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Home Screen
Key Description
SC
HE
D
H
O
L
D
C
L
OCK
SC
REE
N
M
O
R
E
T
U
E
AM
FAN
A
U
T
O
S
Y
S
TE
M
HEAT
Followin
g
Sc
h
edu
l
e
In
s
i
de
S
et T
o
M19952
FAN
SELECTS ON/AUTO/CIRC
SYSTEM
SELECTS EM. HEAT/HEAT/OFF/COOL/AUTO
SCHED
ENTERS SCHEDULING MODE
HOLD
SETS A PERMANENT HOLD AND
ACTIVATES VACATION HOLD
SCREEN
LOCKS OUT THE SCREEN TO ALLOW FOR CLEANING
CLOCK
SETS THE TIME FORWARD OR BACK
UP ARROW
RAISES TEMPERATURE SETTING
DOWN ARROW
LOWERS TEMPERATURE SETTING
MORE (SELECT MODELS)
SHOWS ADDITIONAL SYSTEM
INFORMATION

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Display Description
SC
HE
D
H
O
L
D
C
L
OCK
SC
REE
N
M
O
R
E
T
UE
AM
FAN
A
U
T
O
S
Y
S
TE
M
HEA
T
Followin
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Sc
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edu
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In
s
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S
et T
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M19953
FAN
SHOWS FAN SETTING
T
UE
S
H
O
W
S
CU
RRENT DAY
O
F THE WEE
K
SYSTEM
SHOWS CURRENT SYSTEM POSITION
TIME
DISPLAY CURRENT TIME OF DAY,
HOLD TIME REMAINING OR NUMBER
OF VACATION DAYS REMAINING
IN
S
IDE TEMPERAT
U
R
E
S
H
O
W
S
THE
CU
RRENT IN
S
IDE TEMPERAT
U
R
E
SET TO TEMPERATURE
SHOWS THE CURRENT
SET TEMPERATURE
FOLLOWING SCHEDULE
SHOWS THE THERMOSTAT IS
FOLLOWING THE PROGRAMMED
SCHEDULE

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Programming Your Heating and Cooling Schedule
Your comfort control can control up to four different schedule periods per day:
Wake—Period when you awaken and want your home at a comfortable temperature.
Leave—Period when you are away from home and want an energy-saving temperature.
Return—Period when you return home and want your home back to a comfortable temperature.
Sleep—Period when you are asleep and want an energy-saving temperature.
NOTE: Schedule times are in 15-minute intervals.
Preprogrammed Energy Star Settings
Table 1 shows default program settings. Visit the Energy Star web site at www.energystar.gov
for additional education and resources on programmable comfort controls.

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Table 1. Energy Star Default Program Settings.
Schedule Period Time
Setpoints
Fan SettingHeat Cool
Wake 6:00AM 70°F (21°C) 78°F (25.5°C) Auto
Leave 8:00AM 62°F (16.5°C) 85°F (29.5°C) Auto
Return 6:00PM 70°F (21°C) 78°F (25.5°C) Auto
Sleep 10:00PM 62°F (16.5°C) 82°F (28°C) Auto

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Editing Schedule
1. Press Sched key.
SCHED HOLD CLOCK SCREEN
FRI
AM
PM
FAN
AUTO
SYSTEM
HEAT
Following
Schedule
Inside Set To
M22445

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2. Press Edit key.
SCHEDSCHED HOLDHOLD CLOCK SCREEN
DONE WAKE LEAVE RETURN SLEEP CANCEL
MON TUE WED THU FRI SAT SUN
AM
PMPM
FAN
AUTO
SYSTEM
EM HEAT
HEAT
OFF
COOL
AUTO
CANCEL
PERIOD
HEAT
COOL
Following
Schedule
Inside Set To
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
M22553
EDIT

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3. It is OK to pick multiple days. Select any combination of days to edit. These days are
scheduled with the same times and temperatures. Check marks appear next to days selected.
4. Press Wake key. Once pressed, Wake flashes to show it is selected.
5. Press Up and Down keys to modify time and heat and cool temperatures from this screen.
NOTE: The Fan setting can be programmed for On, Auto, or Circ for each period selected. See
Fan Schedule section for more information.
6. Press Leave key and repeat step 5.
7. Press Return key and repeat step 5.
8. Press Sleep key and repeat step 5.
DONE WAKE LEAVE RETURN SLEEP CANCEL
MON TUE WED THU FRI SAT SUN
AM
FAN
ON
AUTO
CIRC
CANCEL
PERIOD
HEAT
COOL
OK TO PICK MULTIPLE DAYS
M19955

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9. When complete, press Done key. “Saving Changes” appears on the screen to indicate
changes are being saved to the day(s) modified.
NOTE: To set a Program Schedule for the remaining days of the week, repeat steps 1-9. Example:
If Mon - Fri was selected first, go back and repeat steps 1-9 for Sat and Sun.
10. To exit schedule without saving changes, press Cancel key at any time.
MON TUE WED THU FRI
SAVING
CHANGES
M19956

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Cancelling a Schedule Period
NOTE: You may want to cancel a period to match your lifestyle; for example, if someone is always
home during the day on Tuesday, you can cancel the Leave and Return periods (the
comfort control would then control to the Wake temperature until the Sleep period).
1. Press Sched key.
2. Press Edit key.
3. Select the Day(s) of the week desired.
4. Press schedule period you want to cancel (Wake, Leave, Return or Sleep). Once selected, the
period flashes.

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5. Press Cancel Period key.
SCHED
SCHED
HOLD
HOLD
CLOCK SCREEN
DONE WAKE LEAVE RETURN SLEEP CANCEL
MON TUE WED THU FRI SAT SUN
AM
PM
PM
FAN
AUTO
SYSTEM
EM HEAT
HEAT
OFF
COOL
AUTO
CANCEL
PERIOD
HEAT
COOL
Following
Schedule
Inside Set To
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
M22446

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NOTE: Note that the time, temperature(s) and fan setting disappear. The bar above the selected
period is removed, indicating the scheduled period was cancelled. To reinstate a schedule
period, press arrow keys to set desired time and temperatures.
6. Press Done key.
DONE WAKE LEAVE RETURN SLEEP CANCEL
MON TUE WED THU FRI SAT SUN
FAN
HEAT
COOL
OK TO PICK MULTIPLE DAYS
M19957

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Setting Time
1. Press Clock.
2. Use arrows to set current time.
3. Press Done key.
IMPORTANT
The current day of the week should already be set correctly. If not, see advanced settings
to set the day.
DONE CANCEL
TUE
AM
M19958

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Operating Your Comfort Control
Setting Fan and System Keys
SETTING FAN KEY
The Fan key selections vary based on your heating and/or cooling system type.
On — fan runs continuously. Use this setting for improved air circulation or for more efficient central
air cleaning. Continuous fan mode during cooling operation may not be appropriate in humid
climates. If the indoor air exceeds 60% relative humidity, or simply feels uncomfortably humid, it is
recommended that the fan only be used in the Auto mode.
Auto — fan follows fan program schedule. See Fan Schedule section for more information.
Circ — fan runs randomly approximately 35% of time. Use this setting for improved air circulation or
for more efficient central air cleaning when you do not want the fan running continuously.
SETTING SYSTEM KEY
The System key selections vary based on your heating and/or cooling system type.
Heat — controls your heating system.
Off — both heating and cooling systems are off.
Cool — controls your cooling system.
Auto (when enabled) — controls both your heating and cooling system based on temperature.
Em. Heat (heat pump systems only) — controls emergency heat and auxiliary heat, if needed.
Heat pump is not operational.

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Setting Temperature Overrides
Your comfort control has three temperature override options: Hold Temperature Until, Permanent
Hold and Vacation Hold.
HOLD TEMPERATURE UNTIL (TEMPORARY HOLD)
Holds temperature temporarily until the next scheduled period time or until the time the user sets.
1. Press Up or Down arrow next to the temperature you want to adjust. “Hold Temperature Until”
time appears on the screen. The Hold Temperature Until time defaults to the start time of the
next scheduled period.
NOTE: The Time Up and Down arrows are shown for approximately seven seconds. Pressing on
the screen time (where the Hold Temperature Until time is shown) allows the arrows to
reappear.
2. Press Up or Down arrow next to the Time key to set desired time for the comfort control to
resume schedule.

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3. Press the Cancel or Sched key to cancel “Hold Temperature Until” and resume schedule.
NOTE: Once “Hold Temperature Until” time is reached, the comfort control shows “Following
Schedule” on the screen to indicate that “Temporary Hold” has ended.
PERMANENT HOLD
Permanent Hold changes the temperature setting until Permanent Hold is cancelled.
1. Press Hold key. “Permanent Hold” appears on the screen.
2. Press Up or Down arrow next to the temperature you want to set during “Hold”.
SCHED HOLD CLOCK SCREEN
CANCEL
TUE
PM
FAN
AUTO
SYSTEM
HEAT
Inside
Hold Temperature
Until
Set To
M19959

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3. Press Cancel key to cancel “Permanent Hold” and resume the schedule.
VACATION HOLD
Changes temperature setting for a designated number of days.
1. Press the Up and Down arrow keys to set the desired temperature while away on vacation.
Notice that “Hold Temperature Until” time is shown on the screen. (This is the time the
Vacation Hold override expires after the number of days ends.)
2. Press Hold key twice. Screen shows “Hold Temperature Until” one day.
3. Press Up and Down arrow keys to change the number of Days you desire comfort control to
override the schedule.
SCHED HOLD CLOCK SCREEN
CANCEL
TUE
AM
FAN
AUTO
SYSTEM
HEAT
Inside Set To
Permanent
Hold
M19960

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NOTE: Days Up and Down arrows appear for approximately seven seconds. Pressing just below
Hold Temperature Until on the screen allows the Days Up and Down arrows to reappear.
4. To cancel the Vacation Hold override early, press the Cancel key.
NOTE: When the number of days of Vacation Hold expires, the screen shows “Following
Schedule” to indicate that Vacation Hold has ended.
SCHED CLOCK SCREEN
CANCEL
THU
FAN
AUTO
SYSTEM
HEAT
Inside
DAYS
Hold Temperature
Until
Set To
M19961