Honeywell T8131C User Manual

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T8131C

Programmable Thermostat

OWNER’S GUIDE

Programmable Heat and/or Cool

Thermostat and Mounting Plate

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Weekday/Weekend

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Welcome to the world of comfort and energy
savings with your new Honeywell Trol-A-Temp®
programmable thermostat.

Your new T8131 Thermostat is designed to
provide you with reliable, precise temperature
control. By following the simple programming
instructions in this manual, your thermostat will

automatically control the temperature in your
home. Temperature control saves energy and
allows you to awake (or return home) to a
comfortable level of heating or air conditioning.

Direct questions concerning the operation of
this thermostat to Honeywell Customer
Assistance at 1-800-468-1502, Monday-Friday,
7:00 a.m.-5:30 p.m., Central time.

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Table of Contents

Programming Thermostat ............................................................................................................... 4

Program Schedule .......................................................................................................................... 6

T8131C Programming Guide .......................................................................................................... 8

Setting Fan and System Switches .................................................................................................. 12

Installing Batteries........................................................................................................................... 13

Troubleshooting Guide.................................................................................................................... 15

Limited One-Year Warranty.................................................................................... Inside Back Cover

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Programming Thermostat

NOTE: When batteries are installed, your

T8131 Thermostat can be pro­grammed in your hand (armchair
programming), or when it is mounted
on the wall. Batteries are not required
for normal thermostat operation;
however, installed batteries are
recommended to retain your personal
temperature program in memory if ac
power is lost. See Installing Batteries
section.

When you program the thermostat, set one
schedule for weekdays and another for week­ends, because your temperature requirements
probably vary. (During weekends, only the
WAKE and SLEEP time periods are available.)

Use the personal Program Schedule for
planning your program schedule of time and
temperature settings for various times of the
day.

Four time periods are available during week­days —WAKE, LEAVE, RETURN, and
SLEEP. View these periods individually on the
display when you press the Set Schedule key.

Select WAKE if you want the house at a
comfortable temperature when you get up, while
you get ready for work or school. When deciding
what time to set for your WAKE period, include
extra lead time, depending on the outside
temperature and your furnace response time, to
give the furnace a head start to heat the house
before you get up. (This will be a higher
temperature during heating season, or a lower
temperature during cooling season.)

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Select LEAVE if you want an energy-saving
temperature while you are away at work or
school. (This will be a lower temperature during
heating season, or a higher temperature during
cooling season.)

Select RETURN if you want the house at a
comfortable temperature for activities before
bedtime. When deciding what time to set for
your RETURN period, include extra lead time,
depending on the outside temperature and
your furnace response time, to give the furnace
a head start to heat the house before you
arrive home. (Again, higher for heating or lower
for cooling.)

Select SLEEP if you want an energy-saving
temperature while you are sleeping. (For more
comfortable sleeping, some people choose not
to raise the cool temperature during the night.)

Fill in the times and temperatures you desire
for weekdays and weekends. If you decide not
to program the thermostat, it automatically
controls heating at 68°F (20°C) and cooling at
78°F (26°C), 24 hours a day. Also, you do not
need to enter a time and temperature program
for all periods if your schedule does not require
it. For example, a house that is occupied
during weekdays would not require programs
for LEAVE and RETURN.

When pressing the keys, use the ball of your
finger or a soft pencil eraser.

NOTE: Using sharp fingernails or pencil

points can damage the keypad.

If you make an error at any time during
programming, just press the Run Program
key, and continue again at the last step.

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Program Schedule

HEATING PROGRAM SCHEDULE

Weekdays Start Time Heating Temperature

WAKE

1

2

LEAVE
RETURN

1

SLEEP

Weekends

WAKE

1

SLEEP

1

WAKE and RETURN start times should include extra lead time, based on outside temperature
and furnace response time, to give your furnace a head start to heat the house.

2

The temperatures cannot be set any higher than 88°F (31°C) or any lower than 45°F (7°C).

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