Honeywell T7512C User Manual

Scientific

Atlanta

TM

Programmable

Load Controller

USER’S GUIDE

Weekday/Weekend

(5-day/Saturday/

Sunday)

Programmable

Heat and/or Cool

Conventional

and Heat Pump

Time-of-Use Pricing

T7512A,B,C

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Honeywell

69-1003-1

Welcome to the world of comfort and energy
savings with your new Scientific Atlanta/
Honeywell SuperStat thermostat.

to take advantage of Time of Use Pricing, a
service that can increase your energy savings
further.

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

Time-of-Use Pricing. If you subscribe to Time­of-Use Pricing, this thermostat will communicate
with the utility to inform you of the pricing 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 during the
cooling season and a lower temperature during
the heating season. You must subscribe to this
program before your utility company can

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communicate with your thermostat. If you have
any questions concerning the application of this
thermostat or this special program and its
features, please contact your local utility.

TUE

INDICATOR FOR TIME-OF USE PRICING

AM

HR

COOL
AUTO

1 2 3 4

Fig. 1. Time-of-Use Pricing indicator.

M7904

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Table of Contents

Recovery From Setback ................................................................................................................... 5

Programming Your Thermostat ......................................................................................................... 6

Personal Programming Charts .................................................................................................. 8

Step 1—Set the Current Time/Day .......................................................................................... 10

Step 2—Enter the Program Schedules .................................................................................... 10

Step 3—Set the System and Fan Controls .............................................................................. 13

Step 4—Start the Thermostat Program ................................................................................... 14

Operating Your Thermostat ............................................................................................................. 15

Thermostat Operation When Time-of-Use Pricing is in Effect ......................................................... 19

Replacing the Thermostat Batteries ................................................................................................ 20

Troubleshooting Guide .................................................................................................................... 22

Typical Energy Savings................................................................................................................... 26

Warranty Conditions........................................................................................................................ 29

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RECOVERY FROM SETBACK

The term
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.

recovery

refers to the process the

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.)

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
thermostat’s heating program to 72°F at 6:00
AM, the heating equipment will come on at 6:00

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.

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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
Sunday—WAKE, 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.

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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.

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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

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Heating Schedule (for Winter Use): If you subscribe to Time-of-Use Pricing, use the

Time Heating Temperature

Weekday WAKE

LEAVE
RETURN
SLEEP

Saturday WAKE

LEAVE
RETURN
SLEEP

Sunday WAKE

LEAVE
RETURN
SLEEP

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.

Offsets for

Cooling Season (+)

Rate 2 Rate 3 Rate 4 Rate 2 Rate 3 Rate 4

Offsets for

Heating Season (-)

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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 1—Set 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 2—Enter 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 heating mode. Press and release
the WEEKDAY SCHEDULE key once.
The words WAKE, MON…FRI and SET
appear on the display.

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