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1 69-0989—1
Programmable
Load Controller
USER’S GUIDE
Weekday/Weekend
(5-day/Saturday/
Sunday)
Programmable
Heat and/or Cool
Conventional
and Heat Pump
T7512A,B,C
Scientific
Atlanta
TM
Honeywell
69-0989-1
2 69-09891
Welcome to the world of comfort and energy
savings with your new Scientific Atlanta/
Honeywell SuperStat thermostat.
This thermostat allows full weekday/weekend
programming so that you can set the thermostat
to control the temperature in your home
according to your personal schedule and
preferences. When programmed according to
the instructions in this guide, the features
available with this thermostat will not only keep
you comfortable, but will also save you energy.
In addition to being programmable, this
thermostat also contains a communications
module. This module allows your utility
company to communicate with your thermostat
to take advantage of special programs you can
subscribe to that can increase your energy
savings further.
These special programs can include one or
both of the following:
Time-of-Use Pricing. If your utility offers Time-
of-Use Pricing rates, this thermostat will
communicate with the utility to inform you of the
rate in effect at any given time. The rate that is
in effect is indicated on the thermostat display
as shown in Fig. 1. A special feature of this
thermostat allows you to set an offset
temperature that automatically adjusts your
energy use for each rate. This typically involves
controlling your home at a higher temperature
3 69-09891
word SAVING is displayed on the thermostat.
See Fig. 2. You must subscribe to these
programs before your utility company can
communicate with your thermostat. If you have
any questions concerning the application of this
thermostat or these special programs and
features, please contact your local utility.
during the cooling season and a lower
temperature during the heating season.
AM
HR
TUE
COOL
AUTO
1 2 3 4
M7904
INDICATOR FOR TIME-OF USE PRICING
Fig. 1. Time-of-Use Pricing indicator.
Direct Load Control. If your utility offers Direct
Load Control, this thermostat can be controlled
by your utility to limit your cooling and heating
use during peak demand times. When your
thermostat is under Direct Load Control, the
Fig. 2. Saving indicator.
AM
HR
TUE
SAVING
COOL
AUTO
M7903
SAVINGS INDICATOR
4 69-09891
Table of Contents
Recovery From Setback ................................................................................................................. 5
Programming Your Thermostat ....................................................................................................... 6
Personal Programming Charts ........................................................................................................ 8
Step 1Set the Current Time/Day .......................................................................................... 10
Step 2Enter the Program Schedules .................................................................................... 10
Step 3Set the System and Fan Controls .............................................................................. 13
Step 4Start the Thermostat Program ................................................................................... 14
Operating Your Thermostat ............................................................................................................. 15
Thermostat Operation When Special Programs are in Effect ......................................................... 19
Replacing the Thermostat Batteries ................................................................................................ 21
Troubleshooting Guide .................................................................................................................... 23
Typical Energy Savings ................................................................................................................... 28
Warranty Conditions ........................................................................................................................ 31
5 69-09891
RECOVERY FROM SETBACK
The term
recovery
refers to the process the
thermostat uses to operate the heating or
cooling equipment to return the house from the
energy savings setting you select when you are
away or asleep to the temperature you prefer
when you are home and awake.
This thermostat uses a recovery process that
turns your heating/cooling equipment on or off
at the time you program the temperature to
change. For example, if you program the
thermostats heating program to 72°F at 6:00 AM,
the heating equipment will come on at 6:00 AM
and begin warming the house to 72°F. If you
want the temperature in the house to be 72°F at
6:00 AM, you should program the thermostat to
an earlier time; for example, 5:30. (The exact
amount of time it takes your home to warm or
cool to the temperature you want depends on
many factors such as the size of your heating/
cooling equipment and the outdoor
temperature.)
If this thermostat is for a heat pump system, the
thermostat uses an algorithm when recovering
from setback that helps reduce the use of
auxiliary heat.
6 69-09891
PROGRAMMING YOUR
THERMOSTAT
IMPORTANT
Batteries must be installed to maintain
time and date in the event of power
loss.
You will find it helpful to complete the Personal
Programming Charts on the following pages
before you begin programming the thermostat.
Plan your program schedule of time and
temperature settings for various times of the
day by filling in the boxes in the Personal
Programming Charts. There are four time
periods available for weekdays, Saturday, and
SundayWAKE, LEAVE, RETURN, and
SLEEP. These periods can be displayed
individually on the thermostat as you press the
WEEKDAY SCHEDULE or WEEKEND
SCHEDULE keys. You may want to enter a
different schedule for both the cooling and
heating seasons.
WAKE is the time you get up. Generally you
want the house at a comfortable
temperature when you wake up and get
ready to go to work or school. Set the
WAKE time earlier than your alarm clock
so the house has time to warm up or cool
down before you get up.
7 69-09891
LEAVE is the time you leave for work or
school. Generally, once you leave the
house, you want the temperature higher
or lower (depending on the season) so
that you can save energy while you are
away.
RETURN is the time you return from work or
school. Once again, you want the house
at a comfortable temperature when you
return and go about the normal activities
of your day before bedtime. Set the
RETURN time earlier than the time you
actually get home so the house has time
to warm up or cool down before you get
there.
SLEEP is the time you usually go to sleep.
While you are sleeping, you can save
energy by setting the thermostat to
control the temperature higher or lower
(depending on the season). For more
comfortable sleeping, some people
choose not to raise the cooling
temperature at night.
If you decide not to program the thermostat, it
automatically controls heating and cooling
temperatures as follows. Starting at 6:00 AM
every day, the thermostat sets the heating
temperature to 68° and the cooling temperature
to 76°F. At 10:00 PM every night, the thermostat
sets the heating temperature back to 60°F; the
cooling temperature remains at 76°F.
8 69-09891
You do not need to enter a time and
temperature program for every period if your
schedule does not require it. For example, if
your house is occupied during the day on
weekdays, you can program only the WAKE
and SLEEP times.
NOTE: Temperatures cannot be set any
higher than 88°F or any lower than
45°F.
Personal Programming Charts
Cooling Schedule (for Summer Use):
Time Cooling Temperature
Weekday WAKE
LEAVE
RETURN
SLEEP
Saturday WAKE
LEAVE
RETURN
SLEEP
Sunday WAKE
LEAVE
RETURN
SLEEP
9 69-09891
Heating Schedule (for Winter Use): If you subscribe to Time-of-Use Pricing, use the
following table to plan the offsets you will enter
for each Time-of-Use Pricing rate. You should
enter different offsets for the heating and
cooling seasons. You do not need to enter an
offset for rate 1.
Time Heating Temperature
Weekday WAKE
LEAVE
RETURN
SLEEP
Saturday WAKE
LEAVE
RETURN
SLEEP
Sunday WAKE
LEAVE
RETURN
SLEEP
Offsets for
Cooling Season (+)
Offsets for
Heating Season (-)
Rate 2 Rate 3 Rate 4 Rate 2 Rate 3 Rate 4
10 69-09891
Before programming the thermostat, remove
the clear plastic overlay that covers the display.
When pressing the keys, use the ball of your
finger or a soft pencil eraser; using sharp
fingernails or pencil points can damage the
keypad. If you make a mistake during
programming, press the RUN PROGRAM key
and reprogram the time, temperature, or offset
with the error.
Step 1Set the Current Time/Day
To set the time, press and release the SET
CLOCK/DAY key once. Press AHEAD or
BACK keys until the current time is displayed.
To set the day, press and release the SET
CLOCK/DAY key again. Press AHEAD or
BACK keys until the current day is displayed.
After you have set the time and day, press the
RUN PROGRAM key.
Step 2Enter the
Program Schedules
Entering a Heating Schedule
Refer to your Personal Programming Charts
and proceed as follows:
Press the SYSTEM key until the thermostat
displays the word HEAT to indicate you
are in the heating mode. Press and
release the WEEKDAY SCHEDULE key
once. The words WAKE, MON...FRI and
SET appear on the display.
11 69-09891
Press the AHEAD or BACK keys to set the
weekday WAKE time from your Personal
Programming Charts. Press the
WARMER or COOLER keys to set the
weekday WAKE temperature from your
Personal Programming Charts.
Repeat the above sequence for the other
weekday schedules: LEAVE, RETURN, and
SLEEP.
Press the WEEKEND SCHEDULE key until
SAT, WAKE and SET appear on the
display. Set the WAKE, LEAVE, RETURN
and SLEEP schedules for Saturday just
as you did for the weekdays.
Press the WEEKEND SCHEDULE key again
so that SUN, WAKE and SET appear on
the display. Set the WAKE, LEAVE,
RETURN and SLEEP schedules for
Sunday just as you did for the weekdays
and Saturday.
Enter Offset Values
Enter the offset for each Time-of-Use Pricing
rate using the OFFSET key. You can enter
offset numbers only if you are a subscriber to
Time-of-Use Pricing.
The offset you enter is the number of degrees
you are willing to allow the heating or cooling
temperature you have already programmed for
12 69-09891
normal operation to change so you can save
money at each rate. For example, if you
normally want your home heated to 72° when
rate 1 is in effect, but are willing to let your
home cool to 70° when rate 2 is in effect, your
heating offset for rate 2 is -2 (72° -2° = 70°). If
you do not enter an offset, the offset is 0°. The
first time you press the OFFSET key, the offset
for rate 1 is displayed (note the indicator on the
thermostat display as shown in Fig. 1). Use the
WARMER and COOLER keys to set the offset
value. Repeat the procedure for each rate. After
you have entered the last offset value, press the
RUN PROGRAM key.
Entering a Cooling Schedule
Press the SYSTEM key until the thermostat
displays the word COOL to indicate you are in
the cooling mode.
Enter cooling temperatures for the WAKE
LEAVE, RETURN and SLEEP times by
following the same instructions as for Entering a
Heating Schedule above. If you subscribe to
Time-of-Use Pricing, enter offsets for the
cooling season as you did for the heating
season.
13 69-09891
Step 3Set the System
and Fan Controls
After programming the thermostat, set the
system and fan controls as follows:
System Control
If you have a conventional heating/cooling
system, the system can be set to: HEAT, COOL
or OFF. If you have a heat pump system, the
system can be set to: HEAT, EM. HEAT, COOL
or OFF.
You can change the system setting by pressing
the SYSTEM key. Each time you press the key,
the system status changes to the next setting.
The status of the system is as follows when the
associated indicator is displayed:
HEAT: The thermostat will control your
heating system according to the
schedule you programmed (heat
pump in heating mode).
EM. HEAT: The emergency heater element of
the heat pump is on.
COOL: The thermostat will control your air
conditioning system according to
the schedule you programmed
(heat pump in cooling mode).
14 69-09891
No status Both the heating and air conditioning
displayed: systems are off (heat pump off).
Fan Control
There are two fan settings: AUTO and ON.
Set the fan at the setting you want by pressing
the FAN key. Each time you press the key, the
fan status changes to the next setting.
When FAN is displayed, the fan is on
continuously. Use this setting for improved air
circulation during special occasions or for more
efficient electronic air cleaning.
When nothing is displayed, the fan is in AUTO
mode (it comes on with the heating or cooling
equipment, as needed). AUTO is the normal
setting for most homes and allows a single-
speed fan to turn on automatically with the air
conditioner or furnace. If you have a two-speed
fan, it usually runs on high with the air
conditioner and on low with the furnace.
Step 4Start the
Thermostat Program
To start the thermostat using the program you
have just entered, press the RUN PROGRAM
key.
NOTE: For information on energy savings,
refer to the maps in the Typical Energy
Savings section.
15 69-09891
temporary setting stays in effect only until the
next scheduled program change. (If you
subscribe to Time-of-Use Pricing, it stays in
effect only until the next rate change takes
effect.) To cancel the temperature change,
press the RUN PROGRAM key. When a
temporary temperature is in effect, the display
alternates between the time/temperature and
the temporary setting.
Hold a Temperature Indefinitely
You could find this operation useful when you
go out of town on business or on vacation.
Press the HOLD TEMP key and then set the
temperature using the WARMER or COOLER
keys. This temperature stays in effect until you
OPERATING YOUR
THERMOSTAT
Normally you want your thermostat to run
according to the program you entered; however,
you can also perform the following operations.
NOTE: The system control must be set to
HEAT or COOL to perform the
following operations.
Temporarily Change Temperature
Setting
for the current period only
Press the WARMER or COOLER key until the
temperature you want is displayed. The
16 69-09891
press the RUN PROGRAM key or the
PRESENT SETTING key.
Check the Current Temperature Setting
To check the current (programmed) temperature
setting, press the PRESENT SETTING key.
Check the Programs You Entered
Press the WEEKDAY SCHEDULE or
WEEKEND SCHEDULE key. Each time you
press the key, the next program schedule is
displayed. You can use this feature to verify that
you correctly entered the program as shown in
your Personal Programming Charts.
Cancel a Program
You can cancel a program by pressing the
WEEKDAY or WEEKEND key until the program
you want to cancel is displayed; then press the
CLEAR key.
NOTE: You cannot cancel the WEEKDAY
WAKE program.
Check Usage
This thermostat keeps a record of the current
and accumulated on-time of your heating and
cooling equipment. It tracks
current day
usage
(since midnight) and
accumulated
usage (since
the accumulator was last cleared). If you
17 69-09891
subscribe to Time-of-Use Pricing, the
thermostat records usage for each rate.
To view heating or cooling equipment usage,
press the SYSTEM key to display HEAT or
COOL, then press the USAGE key. Each time
you press the USAGE key, the thermostat
displays the next usage value.
If you do not subscribe to Time-of-Use Pricing,
the thermostat displays current usage the first
time you press the USAGE key and accumu-
lated usage the next time you press the USAGE
key.
If you subscribe to Time-of-Use Pricing, there
are eight usage values that can be displayed.
The first time you press the USAGE key, the
thermostat displays the current usage value for
rate 1. Each time you press the USAGE key
again, usage values for rates 2, 3 and 4 are
then displayed. If you continue to press the
USAGE key, accumulated usage values are
displayed for rates 1 through 4.
Press the RUN PROGRAM key to stop viewing
usage.
Current day usage is automatically cleared at
midnight. To clear an accumulated value, press
the USAGE key until the value you want to
clear is displayed and then press the CLEAR
key. If you subscribe to Time-of-Use Pricing,
18 69-09891
your utility can also clear the accumulators by
sending a message to the thermostat.
Permanently Change a Program
To permanently change a program, repeat the
appropriate steps in Programming Your
Thermostat.
Return to Normal Program
or Start Program
Any time you want to return to the normal
program or start the program, press the RUN
PROGRAM key. If you temporarily changed the
temperature or you used the HOLD TEMP key,
pressing the RUN PROGRAM key will cancel
your change.
Change Fan or System Control Settings
Change the fan setting by pressing the FAN
key. Each time you press the key, the fan status
changes to the next setting. When FAN is
displayed, the fan is on continuously. When
nothing is displayed, the fan is in AUTO mode (it
comes on with the heating or cooling
equipment, as needed).
Change the system setting by pressing the
SYSTEM key. Each time you press the key, the
system status changes to the next setting.
19 69-09891
THERMOSTAT OPERATION
WHEN SPECIAL PROGRAMS
ARE IN EFFECT
Normally your thermostat operates as you
programmed it. If you subscribe to either of the
following special programs, there may be times
when it does not operate as you expect. Before
calling for service, read the following
information.
Direct Load Control (DLC)
When the thermostat is operating under Direct
Load Control, the amount of time your heating/
cooling system can operate is controlled by
radio signal from your utility company. If you
notice the temperature in your home is higher or
lower than the setting you programmed into the
thermostat, check the thermostat display. To
indicate the equipment is under Direct Load
Control, the thermostat displays the word
SAVING. You cannot control the heating/cooling
equipment when it is under Direct Load Control.
When the utility releases your thermostat from
Direct Load Control, your heating or cooling
equipment may not be immediately available. To
prevent damage to your heating and cooling
equipment and to allow the utility to bring the
equipment of all homes that subscribe to Direct
29 69-09891
7% TO 9%
10% TO 11%
12% TO 14%
15% TO 18%
ONE 5 F ENERGY SAVINGS PERIOD*
75 TO 80 F; 8 HRS/DAY
11% TO 15%
16% TO 18%
19% TO 22%
23% TO 33%
TWO 5 F ENERGY SAVINGS PERIODS*
75 TO 80 F; 9 HRS/DAY, 7 HRS/NIGHT
M 211B
o
o
o
o
o
o
PERCENTAGE OF COOLING ENERGY YOU CAN SAVE
* Actual savings depend on your home, geographic location,
number of energy saving periods and energy savings temperature.
SEATTLE, WA
16% - 23%
BILLINGS, MT
9% - 16%
MPLS., MN
12% - 20%
CHICAGO, IL
13% - 20%
CINCINNATI, OH
12% - 19%
NEW YORK, NY
13% - 20%
SAN FRANCISCO, CA
14% - 19%
LOS ANGELES, CA
20% - 27%
DODGE CITY, KS
9% - 15%
DC
PHOENIX, AZ
16% - 30%
DALLAS, TX
15% - 28%
ATLANTA, GA
15% - 27%
ALBUQUERQUE, NM
12% - 24%
NEW ORLEANS, LA
16% - 30%
MIAMI, FL
18% - 30%
GREENSBORO, NC
14% - 25%
29

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