T8095A/191108AJ; TS8095A/191108AC; T8095A/Q682
Heating-only Thermostat and Wallplate or
Heating/Cooling Thermostat and Subbase
OWNER’S MANUAL
DowDn.lFo.ad•frRomevW. w10w-.9S4om•anuals.c•om©.HAollnMeaynwuaellsl ISneca.rc1h99A4nd•DoFwonrlmoadN.umber 69-0639—1
Welcome to the world of energy savings with
your new Honeywell thermostat. The Honeywell
name is your assurance of accurate control and
reliable operation for years to come.
Recycling Notice
This control contains mercury in a sealed tube.
Do not place control in the trash at the end of its
useful life.
Your new thermostat will automatically lower and
raise the temperature in your home one or more
times every 24 hours. This allows you to signifi-
cantly lower your fuel costs, while awakening (or
returning home) to a comfortable temperature.
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash.
Read this manual to learn how to use your new
thermostat.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of this control, or of an old control
containing mercury in a sealed tube.
If you have questions, call Honeywell Inc. at
1-800-468-1502.
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2
Table of Contents
Page
Features of Your Thermostat ............................................................................................................. 4
Setting the Temperature ..................................................................................................................... 7
Setting Subbase Switches ................................................................................................................. 8
Inserting Clock Batteries .................................................................................................................... 9
Setting the Clock...............................................................................................................................10
Programming .................................................................................................................................... 11
Troubleshooting ................................................................................................................................15
Servicing the Thermostat ..................................................................................................................23
Cycle Rate Adjustment .................................................................................................................23
Thermometer Adjustment .............................................................................................................24
Warranty ...........................................................................................................................................27
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3
69-0639—1
2
3
4
THERMOSTAT COVER. Lift up and
remove to adjust heat anticipator.
THERMOMETER. Provides accurate room
temperature reading.
PROGRAM INDICATOR. Blue indicates low
temperature is in effect; red indicates high
temperature is in effect.
Features of Your
Thermostat
1
2
5
6
CLOCK. Provides a 24-hour slotted dial to
hold the programming pins.
CLOCK HANDS. Turn minute hand
clockwise
to match the correct AM or
PM time to the time indicator.
7
TIME INDICATOR. Arrow head (triangle
shape) indicates blue (low) temperature
setting or red (high) temperature setting in
control on program index wheel. Also
indicates time on 24-hour dial.
4
3
M7318
8
PROGRAM INDEX WHEEL. Controls high
and low temperature at specific time of day
as set by program pins.
1
FLIP-UP COVER. Lift up to set clock for
energy savings and normal temperature
periods.
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4
16 MERCURY BULB AND BIMETAL ELE-
MENT (2). Provide automatic temperature
control by switching the heating or cooling
system on or off.
9
TEMPERATURE SETTING LEVERS. Left
(blue mark) controls low temperature and
right (red mark) controls the high temperature.
10 PROGRAM PINS. Insert into 24-hour clock
dial slots to control program index wheel.
11 PIN SLOTS. Located on 24-hour dial at
10-minute intervals for program pin insertion.
12 PROGRAM DIAL. 24-hour dial with light
band to indicate daytime and dark band to
indicate nighttime.
6
5
11
9
16
13 MANUAL PROGRAM ADVANCE BUTTON.
Allows change from comfort to energy
savings setting and vice versa without
changing the program.
14 HEAT ANTICIPATOR SCALEPLATE.
Calibrated to match the heating system
current draw in amperes.
15 ANTICIPATOR SETTING LEVER. Adjust to
match the heating system primary control
current.
7
12
8
13
15
10
14
M7316
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5
69-0639—1
17 191108 WALLPLATE. Provides mounting
base and wiring connections for heating-
only or cooling-only thermostat.
18 Q682 SUBBASE (not included with
thermostat; ordered separately). Provides
mounting base, wiring connections and
manual switching control for heating/cooling
thermostat. See Setting Subbase Switches
section for additional information.
17
O
B
R
G
W
Y
18
FAN
COOL
ON
AUTO
HEAT
OFF
M1809
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6
Setting the Temperature (Fig. 1)
For Heating:
■ Set the left lever (blue mark) to the energy
savings temperature you want when you are
sleeping or your home is unoccupied.
■ Set the right lever (red mark) to the tempera-
ture you want for normal comfort periods.
HIGH
LOW TEMPERATURE
SETTING LEVER
(BLUE MARK)
TEMPERATURE
SETTING
LEVER
(RED MARK)
70
60
80
50
NOTE: You may override the time program by
setting both the red and blue levers to the
12
10
4
50 60 70 80
same temperature setpoint.
3
9
4
1 0
For Cooling:
6
■ Set the left lever (blue mark) to the tempera-
ture you want for normal comfort periods.
■ Set the right lever (red mark) to the energy
savings temperature you want when you are
M1520
Fig. 1—Setting high and low temperature levers.
sleeping or your home is unoccupied.
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7
69-0639—1
Setting Subbase Switches (If Applicable)
The subbase system switch controls system
operation as follows:
The subbase fan switch controls fan operation
as follows:
HEAT—Heating system is controlled by the
thermostat. Cooling system is off.
COOL—Cooling sytem is controlled by the
thermostat. Heating system is off.
OFF—Both the heating and cooling sytems are
off. If the fan switch is in the AUTO position,
the fan is also off.
ON—Fan operates continuously.
AUTO—Fan operates with cooling equipment as
controlled by the thermostat or with heating
equipment as controlled by the plenum fan
switch. In electric heat, heat pump and fan coil
systems, the fan is controlled by the thermo-
stat in heating and cooling.
AUTO—In cooling only application, only cooling
operates. In heating only applications, only
heating operates.
To switch positions, use thumb or index finger
to slide lever to desired position. Switch lever
must stop in detent over desired function
indicator mark for proper circuit operation.
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8
Inserting Clock Batteries
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
Power is supplied to the clock by the 24 Vac
transformer. Backup batteries (not included) may
be installed to supply power to the clock when
power is interrupted. Install batteries in thermo-
stat as shown in Fig. 2. Once a year or when
batteries are dead, replace with two new AAA
alkaline batteries. We recommend Energizer
batteries.
M7188
Fig. 2—Inserting Clock Batteries.
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9
69-0639—1
Setting the Clock
■ Lift thermostat flip-up cover to find the 24-hour
program dial, slotted in 10-minute increments.
Adjust the clock to the current time by moving
the minute hand carefully in a clockwise
direction. Do not reverse the minute hand.
■ After setting the time correctly, the Time
Indicator Arrow (triangle shape) will point to
the correct time and corresponding daytime
(light) or night-time (dark) band of the program
dial. See Fig. 3.
one hour. When Daylight Savings Time ends, move
the minute hand carefully in a clockwise direc-
tion 23 hours. Do not reverse the minute hand, or
damage to the timer mechanism may occur.
PROGRAM DIAL
MINUTE
HAND
EXAMPLE: For 11 PM, the time indicator arrow
will point directly to the dark band. For 11 AM,
the arrow will point to the light band on the dial.
TIME
INDICATOR
ARROW
Daylight Savings Time
TIME INDICATOR ARROW
When Daylight Savings Time starts, move the
M1813
minute hand carefully in a clockwise
direction
Fig. 3—Setting the clock.
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10
Programming
You can program your thermostat to automati-
cally lower and raise the temperature one or
more times every 24 hours, depending on the
number of program pins used.
24-HOUR PROGRAM DIAL
(GRAY AREA FOR
NIGHT SETTINGS
FLIP-UP
COVER
Before setting your program
■ Lift thermostat flip-up cover to find the 24-hour
program dial. The slots on the program dial
(Fig. 4) are for the program pins that can be
inserted at 10-minute intervals.
PROGRAM
PINS
■ Three red and three blue program pins are
included with your thermostat. The red pins
start the high-temperature period; the blue
pins start the low-temperature period. A
heating program is preprogrammed. A red pin
is inserted at 6:00 A.M. for high-temperature
(comfort period); a blue pin is inserted at
10:00 P.M. for low-temperature (energy saving
THERMOSTAT
COVER
PROGRAM PIN SLOT
PROGRAM PIN
STORAGE
PROGRAM INDEX WHEEL
TIME INDICATOR
MANUAL PROGRAM
ADVANCE BUTTON
ARROW
M7319
Fig. 4—Program Components.
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11
69-0639—1
period). Two additional sets of pins are located
in the program pin storage area. You can set
up to six temperature changes with the pins
supplied. We recommend at least five hours
for each energy saving period.
also probably want to change the lever
positions.
Setting the Heating Program:
■ Decide when you want the temperature to
reach the comfort level. Find the notch on the
dial that is one-half hour before this time and
insert a red pin. The high temperature is in
effect. The half-hour head start period gives
the furnace time to heat the house before you
awaken or arrive home.
■ Decide when you want the energy savings
period to start and insert a blue pin at the notch
that corresponds to this time. After the blue pin
engages, the low temperature is in effect. The
furnace will be off until room temperature drops
to the energy saving setpoint.
■ To change the pins or add a new energy
saving period—
• To insert a pin, push it straight into the
selected notch on the program dial until it is
completely seated.
• To remove a pin, press against the program
dial and pull the pin straight out. Do not
attempt to change a pin if it is engaged with
the program index wheel.
• On heating/cooling systems, set the
subbase switches to the desired positions.
See Setting Subbase Switches section.
• On heating/cooling systems, you must reset
the pins when the seasons change. You will
■ You can set both a day and a night program.
See Fig. 5 for program examples.
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12
WINTER
PROGRAM
SUMMER
PROGRAM
Setting the Cooling Program:
■ Decide when you want the temperature to
reach the comfort level. Find the notch on the
dial that is one-half hour before this time and
insert a blue pin. The low temperature is in
effect. The half-hour head start period gives
the air conditioner time to cool the house
before you awaken or arrive home.
TEMPERATURE
TEMPERATURE
PIN IN
PIN IN
CONTROL
°F
58
°C
27
CONTROL
°C
14
°F
80
BLUE
RED
RED
BLUE
RED
BEGINS
10:00 PM
NIGHT
ENERGY
SAVING
PERIOD
ENDS
6:00 AM
68
58
68
24
27
24
20
14
20
75
80
75
DAY
BEGINS
7:30 AM
BLUE
RED
ENERGY
SAVING
PERIOD
ENDS
4:00 PM
BLUE
■ Decide when you want the energy saving
period to start and insert a red pin at the notch
that corresponds to this time. After the red pin
engages, the high temperature is in effect.
The air conditioner will be off until room
temperature rises to the energy saving
setpoint.
M1690B
Fig. 5—Programming Examples.
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13
69-0639—1
Press the button to immediately begin an
energy savings period or return to the normal
setting. After pressing the button, check the
program indicator on the thermostat cover to
assure the system is in the desired mode. If the
program indicator shows blue, the lower tempera-
ture is in effect; if it shows red, the higher
Start or End Programs with
Manual Program Advance Button
IMPORTANT: To prevent damage to the program
advance mechanism, DO NOT use the
program advance button within a 30-minute
period before or after a program change.
temperature is in effect. Using the manual
advance button will not affect the stored program.
The manual program advance button enables
immediate, one-time-only program changes to
accommodate temporary schedule changes.
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14
Troubleshooting
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to
the following:
Problem
Check
Action
No heat.
—system switch. May be in OFF
or COOL position.
Move system switch to HEAT position.
See page 8.
2
—fuse or circuit breaker.
If blown or tripped, replace fuse or reset
breaker.
—furnace power switch.
May be OFF.
Move switch to ON .
—pilot flame. May be out.
Relight pilot flame according to furnace
manufacturer’s instructions.
—thermostat connections.
Turn OFF power to furnace. Check for
correct terminal hookups. Repair any
frayed or broken wires. Firmly tighten all
terminal screws. Turn on power.
(Continued)
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15
69-0639—1
Troubleshooting (Continued)
Problem
Check
Action
—other.
Contact a qualified service technician
for assistance.
Energy savings
temperature pro-
gram 12 hours off.
—program dial for proper day
or night phase.
Turn clock ahead 12 hours. Move
minute hand clockwise
only.
Rooms do not
warm up at pro-
grammed time.
—timer program for heating
system. May need more time
to warm up rooms.
Move red pin one-half hour earlier
on the program dial.
2
Temperature
change occurs
at the wrong time.
—program pins for correct time
locations.
Relocate pins to desired settings.
Reset to desired temperatures.
Room
temperatures
are not correct.
—positions of thermostat set
point levers.
—position of subbase system
switch (heating-cooling model).
Move to desired operating position.
Refer to page 8.
(Continued)
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16
Troubleshooting (Continued)
Problem
Check
Action
Room
—thermostat circuits.
HEATING-ONLY SYSTEM—Move
temperature setting levers 5° F [3° C]
above room temperature. Heating system
should start. If the system does not
operate, call a qualified service technician.
COOLING-ONLY SYSTEM—Move
temperature setting levers 5° F [3° C]
below room temperature. Cooling system
should start. If the system does not
operate, call a qualified service technician.
HEATING/COOLING SYSTEM—With
system switch at HEAT, move tempera-
ture setting levers 5° F [3° C] above
room temperature. Heating system
should start. With system
temperatures
are not correct
(continued).
(Continued)
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17
69-0639—1
Troubleshooting (Continued)
Problem
Check
Action
Room
switch at COOL, move temperature
setting levers 5° F [3° C] below room
temperature. Cooling system should
start. If the system does not operate, call
a qualified service technician.
temperatures
are not correct
(continued).
Burner-on time
too short.
—anticipator setting. (See Fig. 6
for anticipator location.)
Increase anticipator setting by 0.05.
Observe burner operation.
Burner-on time
too long.
—anticipator setting. (See Fig. 6
for anticipator location.)
Decrease anticipator setting by 0.05.
Observe burner operation.
No cooling.
—system switch. May be in OFF
or HEAT position.
Move switch to COOL position.
See page 8.
1
—fuse or circuit breaker.
If fuse is blown or breaker tripped,
replace or reset.
(Continued)
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18
Troubleshooting (Continued)
Problem
Check
Action
No cooling
(continued).
—condenser switch position.
(Located outdoors and may
be turned OFF.)
Move to ON position.
1
—thermostat connections. Check
for correct terminal hookups.
Turn OFF power to cooling system.
Repair any frayedor broken wires.
Firmly tighten all terminal screws.
—other.
Contact a qualified service technician
for assistance.
Thermostat setting —level position of thermostat.
and thermometer
Reinstall thermostat wallplate or
subbase. Use a spirit level.
reading disagree.
—area around thermostat for
Thermostat should be about 5 ft [1.5m]
above floor on an inside wall. Contact a
qualified service technician for change
of location.
drafts or radiant heat.
(Continued)
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19
69-0639—1
Troubleshooting (Continued)
Problem Check
Action
Thermostat setting —calibration of thermometer.
and thermometer
See instructions on page 24.
reading disagree.
(continued).
Clock does not run. —voltage across the two
C terminals.
Remove thermostat from the wallplate
or subbase and measure the voltage.
Refer to the table on page 22 for cause
and reaction.
— pins in program dial. If pins are
not completely seated in
Push down on pins to make sure they
are completely seated in program dial.
program dial, jamming with
index wheel may occur.
Clock loses time.
—power. May be interrupted.
Make sure power is on. Reset clock.
(Continued)
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20
Troubleshooting (Continued)
Problem
Check
Action
Clock loses time.
(continued).
—high limit control. If clock-
powered through system trans-
former, power to clock and
Wire separate transformer to power
clock, or install backup batteries as
shown on page 9.
equipment may be off for safety.
—filter. May be clogged. Safety
limit on equipment may cut off
power to system.
Replace filter and reset clock.
—backup batteries may need
replacement.
Replace with two new AAA alkaline
batteries. See page 9.
1
2
Not applicable on model used in heating-only system.
Not applicable on model used in cooling-only system.
If this Troubleshooting section has not solved the problem, call a qualified service technician or
Honeywell Assistance Center, 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time,
for additional assistance.
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21
69-0639—1
Voltage at Clock Terminals
AC Voltage at
C-C Terminals
Check
Action
0 Vac.
— System power off.
— Restore power.
— Replace wiring.
— Free or replace limit switch.
— Replace transformer.
— Short in clock power supply wiring.
— Limit switch contacts stuck open.
— Transformer supplying power is
burned out.
Up to 15 Vac.
15 to 30 Vac.
— System transformer used to power
the clock is inadequate.
— Additional (separate) transformer
used to power the clock has
inadequate voltage.
— Use additional (separate)
transformer.
— Install transformer with proper
secondary voltage.
— Spring fingers on thermostat not
making proper contact with subbase
terminals.
— Rebend spring fingers to a
45 degree angle to assure
proper contact.
— Clock has failed.
— Replace thermostat.
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22
Servicing the Thermostat
Cycle Rate Adjustment
(T8095A only)
The equipment should cycle on and off just
enough to keep the room temperature close to
the temperature lever settings.
If the thermostat seems to cycle the heating
system too fast or too slow, adjust the cycle rate
by moving the anticipator setting lever one
indicator mark at a time (Fig. 6). Observe the
heating system operation after each adjustment.
ANTICIPATOR
SCALEPLATE
ANTICIPATOR
SETTING LEVER
M7317
NOTE: Most hot water systems require a setting
of 1.2A.
Fig. 6—Heat Anticipator Setting.
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23
69-0639—1
6. Replace the thermostat cover and put the
system into operation.
Thermometer Adjustment
The thermometer was accurately calibrated at
the factory and should only need adjustment if it
was dropped or mishandled.
If the setpoint lever and the thermometer
reading do not agree, use the following procedure:
1. Remove thermostat cover and open the
flip-up cover.
THERMOMETER
BACKSIDE OF
SLOT
FLIP-UP COVER
2. Set the thermostat cover on a table near a
thermometer of known accuracy.
INSERT AND TURN
SCREWDRIVER
3. Allow at least five minutes for cover
thermometer to sense area temperature, then
compare the readings. Be careful not to touch
thermometer or breathe on it.
4. If the readings are the same, replace the
cover and put the system into operation.
5. If the readings are different, insert a small
screwdriver in the thermometer slot, see Fig. 7,
and turn it until both thermometers read the
same.
M1810
Fig. 7—Thermometer Adjustment.
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24
If you have questions regarding the installation and programming of your Honeywell thermostat,
please contact the Honeywell Customer Assistance Center at 1-800-468-1502, Monday-Friday, 7:30 a.m.
to 4:00 p.m., Central time. Before you call, please have the following information available: make and
model of furnace, old thermostat, and air conditioner.
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25
69-0639—1
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26
Limited One-Year 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)
(ii)
return it, with a bill of sale or other dated proof of purchase, to the dealer or contractor from which you purchased it, or
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 Inc.
in Canada
Returned Goods Department
1050 Berkshire Lane
Plymouth, MN 55441-4437
Honeywell Limited/Honeywell Limitee
740 Ellesmere Road
Scarborough, Ontario M1P2V9
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.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL 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 OF ANY 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 MERCHANTABILITY AND FITNESS FOR A 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 Customer Assistance 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.
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27
69-0639—1
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited—Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V 4Z9
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