Honeywell T7512A User manual

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USER’S GUIDE
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Energy Management
Thermostat
Weekday/Weekend
(5-day/
Saturday/Sunday)
Programmable
Heat and/or Cool
Conventional
and Heat Pump
T7512A,B,C,D

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Welcome to the world of comfort and energy
savings with your new Honeywell Energy
Management Thermostat.
This thermostat allows full weekday/weekend
programming so 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 thermo-
stat also contains a communications module.
This module allows your utility company to
communicate with your thermostat to take
advantage of special programs you can sub-
scribe to that can further increase your energy
savings.
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 control-

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ling your home at a higher temperature
during the cooling season and a lower
temperature during the heating season.
Fig. 1. Time-of-use pricing indicator.
Direct Load Control. If your utility offers
Direct Load Control (DLC), this thermostat
can be controlled by your utility to limit
your cooling and heating use during peak
demand times. When your thermostat is
AM
HR
TUE
COOL
AUTO
1 2 3 4
M7904
INDICATOR FOR TIME-OF USE PRICING
under DLC, the word SAVING is displayed
on the thermostat. See Fig. 2.
You must subscribe to these programs
before your utility company can communi-
cate 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.
AM
HR
TUE
SAVING
COOL
AUTO
M7903
SAVINGS INDICATOR
Fig. 2. Savings indicator.

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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 .......................................................................... 12
Step 4—Start the Thermostat Program ............................................................................... 14
Operating Your Thermostat ........................................................................................................... 14
Thermostat Operation When Special Programs are in Effect ....................................................... 18
Replacing the Thermostat Batteries ..............................................................................................20
Troubleshooting Guide .................................................................................................................. 22
Toll-Free Customer Assistance ..................................................................................................... 27
Warranty Conditions ...................................................................................................................... 28

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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 selected for 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
thermostat’s 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 tempera-
ture.)
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 Program-
ming Charts. There are four time periods
available for weekdays, Saturday, and Sunday—
WAKE, LEAVE, RETURN, and SLEEP on the
T7512A,B,C,D Thermostats. 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 the cooling and the
heating seasons.
WAKE is the time you get up. Generally you
want the house at a comfortable tempera-
ture 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

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has time to warm up or cool down before
you get up.
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 (depend-
ing 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.

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At 10:00 PM every night, the thermostat sets the
heating temperature back to 60°F; the cooling
temperature remains at 76°F.
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):
Schedule Time Period 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
following table to plan the offset values you will
enter for each Time-of-Use Pricing rate, use a
numerical value as described in Enter Offset
Values. You should enter a different offset value
for the heating and cooling seasons, see chart.
You do not need to enter an offset for rate 1.
Schedule Time Period 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

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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 program-
ming, press the Run Program key and repro-
gram the time, temperature, or offset value 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 orBack
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 the heating mode. Press and
release the Weekday Schedule key once.
The words WAKE, MON...FRI and SET
appear on the display.
Press the Ahead or Back keys to set the
weekday WAKE time from your Personal
Programming Charts. Press the Warmer