Honeywell T8000C User manual

169-1431
OWNER’S GUIDE
T8000C, T8001C, T8011R, T8024C
Programmable Thermostats
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Welcome to the world of comfort and energy
savings with your new Honeywell programmable
thermostat.
Your new programmable thermostat is designed
to provide you with reliable, precise temperature
control. When you follow the simple program-
ming instructions in this manual, your thermostat
automatically controls the temperature in your
home, saving energy and allowing 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.
Features
•Program up to four time periods with
temperature settings to complement
your lifestyle.
•Set different schedules for weekdays and
weekend.
•Programspermanentlyheldinnonvolatile
memoryineventofpowerfailure.
•Indefinite temperature hold.
•Preprogrammed for your convenience.

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Contents
Features .......................................................................................................................................... 2
Key Locations and Descriptions ...................................................................................................... 4
Planning Program Schedule ........................................................................................................... 5
Program Schedule...................................................................................................................... 6
Programming Thermostat ............................................................................................................... 7
Setting Current Time and Day ....................................................................................................8
Setting Weekday Program.......................................................................................................... 9
Setting Weekend Program .........................................................................................................10
Setting Temporary Temperature Hold ......................................................................................... 13
Setting Indefinite Temperature Hold ........................................................................................... 13
Operating Thermostat ..................................................................................................................... 13
Setting SYSTEM and FAN Switches .......................................................................................... 13
Minimum Off-Timing........................................................................................................................ 14
Troubleshooting............................................................................................................................... 15
Warranty.......................................................................................................................................... 18

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Key Locations and Descriptions
SYSTEM
CoolOffHeat
AutoOn
FAN
M14673
Hold
Select
HOLD KEY
• SET TEMPORARY TEMPERATURE HOLD.
INCREASE ▲ KEY
• PROGRAM TIME AND TEMPERATURE.
• SET INDEFINITE TEMPERATURE HOLD.
SELECT KEY
• CURRENT SETPOINT.
• CHANGE DAY AND TIME.
• PROGRAM SELECTIONS.
DECREASE ▼KEY
• PROGRAM TIME AND TEMPERATURE.
• SET TEMPORARY TEMPERATURE HOLD.
SYSTEM
SWITCH
FAN
SWITCH
TUE
PM

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Planning Program Schedule
The thermostat display shows day, time,
program period, and temperature.
The thermostat can be set for four time
periods per day for weekdays and weekend.
Before programming the thermostat, you can
use the program schedule to plan your
program.
Fill in the weekday and weekend times and
temperatures you desire. If you decide not to
program the thermostat, it uses the
preprogrammed time and temperature settings
inTable1.
Table1.PreprogrammedTime
andTemperatureSettings.
Period Time Heat Setpoint Cool Setpoint
Wake 6:00 AM 70°F
(21°C) 78°F (26°C)
Leave 8:00 AM 62°F
(17°C) 85°F (29°C)
Return 6:00 PM 70°F
(21°C) 78°F (26°C)
Sleep 10:00PM 62°F
(17°C) 82°F (28°C)

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Program Schedule
Weekday StartTime HeatingTemperature CoolingTemperature
Wake ________ ________ ________
Leave ________ ________ ________
Return ________ ________ ________
Sleep ________ ________ ________
Weekend StartTime HeatingTemperature CoolingTemperature
Wake ________ ________ ________
Leave ________ ________ ________
Return ________ ________ ________
Sleep ________ ________ ________
Wake and Return start times should include extra lead time, based on outside temperature and
equipment response time, to give your equipment a head start to heat or cool the house. The
temperatures cannot be set any higher than 99°F (37°C) or any lower than 40°F (4°C).

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Programming Thermostat
The thermostat is flexible and can be program-
med for different schedules for weekdays and the
weekend to meet your lifestyle needs.
Use the personal Program Schedule for planning
your time and temperature settings for various
times of the day.
Four time periods are available during weekdays
and the weekend—Wake, Leave, Return, and
Sleep.
Wake is the time the thermostat turns on the
heating/cooling equipment after an energy
saving period. When deciding what time to
set for your Wake period, include extra
lead time, depending on the outside temp-
erature and your equipment response
time, to give the equipment a head start to
heat or cool the house before you get up.
(This will be a higher temperature during
heating season, and a lower temperature
during cooling season.)
Leave is the time period you can set for an
energy-saving temperature while you are
away at work or school. (This will be a
lower temperature during heating season,
and a higher temperature during cooling
season.)
Return is the time the thermostat turns on the
heating/cooling equipment after an energy
saving period. When deciding what time to
set for your Return period, include extra
lead time, depending on the outside temp-
erature and your equipment response time,
to give the equipment a head start to heat
or cool the house before you arrive home.

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Sleep is the time period you can set for an
energy-saving temperature while you are
sleeping. (For more comfortable sleep-
ing, some people choose not to raise the
cool temperature during the night.)
IMPORTANT
Always press the keys with your
fingertip or similar blunt tool. Sharp
instruments like pens and pencil
points can damage the keyboard.
Setting Current Time and Day
1. To set current time, press Select twice.
Press ▲ or ▼
to set current
time.
While setting the current time, the word SET is
displayed.
2. To set day of week, press Select again.
Press ▲ or ▼
to set current
day.
To use the preprogrammed time and tempera-
ture (see Table 1), press Hold to exit the
programming mode.
M12591A
SET
PM
M18534
SET

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Setting Weekday Program
Slide the SYSTEM switch to the position, Heat
or Cool, you want to program. A flame (heat-
ing) or a snowflake (cooling) appears in the
right side of the display, when setting the
program temperature.
3. Wake
a. Press Select. Press ▲ or ▼to set
Wake
time.
b. Press Select. Press ▲ or ▼to set
Wake
temp-
erature.
4. Leave
a. Press Select. Press ▲ or ▼to set
Leave
time.
b. Press Select. Press ▲ or ▼to set
Leave
temp-
erature.
5. Return
a. Press Select. Press ▲ or ▼to set
Return
time.
M18570
SET
M12625C
SET
M18566
SET
M12627B
SET
M18567
SET

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b. Press Select. Press ▲ or ▼to set
Return
temp-
erature.
6. Sleep
a. Press Select. Press ▲ or ▼to set
Sleep
time.
b. Press Select. Press ▲ or ▼to set
Sleep
temp-
erature.
Setting Weekend Program
7. Wake
a. Press Select. Press ▲ or ▼to set
Wake
time.
b. Press Select. Press ▲ or ▼to set
Wake
temp-
erature.
M12629B
SET
M18568
SET
M12631C
SET
M18569
SET
M12633C
SET

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8. Leave
a. Press Select. Press ▲ or ▼to set
Leave
time.
b. Press Select. Press ▲ or ▼to set
Leave
temp-
erature.
9. Return
a. Press Select. Press ▲ or ▼to set
Return
time.
b. Press Select. Press ▲ or ▼to set
Return
temp-
erature.
10. Sleep
a. Press Select. Press ▲ or ▼to set
Sleep
time.
b. Press Select. Press ▲ or ▼to set
Sleep
temp-
erature.
M12637B
SET
M18550
SET
M18554
SET
M12635B
SET
M12639C
SET
M18552
SET

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11. Press Select. End is displayed. Program-
ming is complete. The thermostat reverts
to displaying
the current
day time and
temperature in
five seconds.
Setting Temporary Temperature Hold
1. Press ▲ or ▼key to set a temporary
temperature
setting.
NOTE: The temporary temperature setting
remains in effect until the next program
period.To cancel, press Hold twice.
Setting Indefinite Temperature Hold
The Hold key allows you to indefinitely hold a
temperature. When Hold is active, the letters
Hld are displayed continuously. Hold can be
canceled by pressing the Hold key again.
1. Press Hold
2. Press ▲ or ▼ key to set indefinite
temperature
setting.
M12640A
TEMPORARY
WED
PM
M12641A
M18556
SET

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Operating Thermostat
Setting SYSTEM and FAN Switches
Use the SYSTEM and FAN switches to control
thermostat operation.
SYSTEM settings:
Cool: The thermostat controls the cooling.
Off: Both the heating and cooling are off.
Heat: The thermostat controls the heating.
Em. Ht. (heat pump models only): The
thermostat cycles emergency heat relay
(E) and cycles auxiliary heat (W2), as
needed, to maintain setpoint. Terminal L is
energized continuously (fault heat relay is
on continuously). Compressor is de-
energized.
Slide the SYSTEM switch in the lower right
corner of the thermostat to select the desired
system setting.
FAN settings:
Auto: Fan operates with equipment.
On: Fan operates continuously.
Slide the FAN switch in the lower left corner of
the thermostat to select the desired fan setting.
Heat and Cool Indicators:
Indicates a call for heat.
Indicates a call for cool.
NOTE: In the programming mode, the
and indicate system setting.

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The minimum off-timer operates in cooling on
the T8000C and T8001C, and in first stage
heating or cooling on the T8011R (heat pump
model) and T8024C (multistage model). A
flashing flame or or snowflake indicates the
minimum off-time is in effect.
Minimum Off-Timing
The thermostat minimum off-timer assures that
the compressor does not come on again for at
least five minutes after it turns off. The minimum
off-timer is triggered when the compressor turns
off and when the SYSTEM switch position is
changed. If the compressor turns off when the
setpoint is changed, the minimum off-timer is
triggered. Power interruption and power
restoration also trigger the minimum off-timer.

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Troubleshooting
continued
Symptom Action
Display does not come on. •Check if the thermostat is mounted and latched on
the wallplate—mount and latch the thermostat on
the wallplate.
•Check if the circuit breaker is tripped—reset the
circuit breaker.
•Check if the fuse is blown—replace the fuse.
•Check if the switch at the equipment is in the Off
position—set to the On position.
Temperature settings do not
change (example: cannot set the
heating higher or the cooling
lower).
•Check that the temperature setpoints are: between
40 to 99°F (4 to 37°C).

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Troubleshooting (Continued) .
continued
Symptom Action
Heating does not come on. •Check if the circuit breaker is tripped—reset the
circuit breaker.
•Check if the fuse is blown—replace the fuse.
•Check if the switch at the equipment is in the Off
position—set to On position.
•Wait five minutes for the system to respond.
•Set SYSTEM switch to Heat.
Cooling does not come on. •Check if the circuit breaker is tripped—reset the
circuit breaker.
•Check if the fuse is blown—replace the fuse.
•Check if the switch at the equipment is in the Off
position—set to On position.
•Wait five minutes for the system to respond.
•Set SYSTEM switch to Cool.

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Symptom Action
System on indicator
or is lit, but no warm
or cool air is coming from the
registers.
Wait a couple minutes after seeing the flame or
snowflake and then check the registers.
System on indicator
or is flashing. Minimum off-timer is in effect. Wait five minutes until
the minimum off-timer is complete.
Troubleshooting (Continued) .

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Warranty
Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials,
under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any
time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at
Honeywell’s option) within a reasonable period of time.
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the retailer from which you purchased it, or
(ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of
the malfunction, and mail it, postage prepaid, to the following address:
Honeywell Return Goods
Dock 4 MN10-3860
1885 Douglas Drive North
Golden Valley, MN 55422
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by
Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the
possession of a consumer.

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Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEY-
WELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL
OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OFANY
WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not
allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE
DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITYAND
FITNESS FORA PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS
WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation
may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
If you have any questions concerning this warranty, please write our CustomerAssistance Center, Honeywell
Inc., P.O. Box 524, Minneapolis, MN 55440-0524 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m.,
Central time. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 155 Gordon
Baker Road, North York, Ontario M2H 2C9.

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69-1431 9-00 J.H.
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Honeywell Limited-Honeywell Limitée
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Scarborough, Ontario
M1V 4Z9
Home and Building Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422