Honeywell T8095A/191108AJ User manual

D.F. • Rev. 10-94 • • ©Honeywell Inc. 1994 • Form Number 69-0639—1
T8095A/191108AJ; TS8095A/191108AC; T8095A/Q682
Heating-only Thermostat and Wallplate or
Heating/Cooling Thermostat and Subbase
OWNER’S MANUAL
M3375
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited—Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9

M3375
Recycling Notice
This control contains mercury in a sealed tube.
Do
not place control in the trash at the end of its
useful life.
If this control is replacing a control that contains
mercury in a sealed tube, do
not place your old
control in the trash.
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.
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.
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.
Read this manual to learn how to use your new
thermostat.
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
2
369-0639—1

M3375
Recycling Notice
This control contains mercury in a sealed tube.
Do
not place control in the trash at the end of its
useful life.
If this control is replacing a control that contains
mercury in a sealed tube, do
not place your old
control in the trash.
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.
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.
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.
Read this manual to learn how to use your new
thermostat.
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
2
369-0639—1

Features of Your
Thermostat 2THERMOSTAT COVER. Lift up and
remove to adjust heat anticipator.
3THERMOMETER. Provides accurate room
temperature reading.
4PROGRAM INDICATOR. Blue indicates low
temperature is in effect; red indicates high
temperature is in effect.
5CLOCK. Provides a 24-hour slotted dial to
hold the programming pins.
6CLOCK HANDS. Turn minute hand
clockwise to match the correct AM or
PM time to the time indicator.
7TIME 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.
8 PROGRAM INDEX WHEEL. Controls high
and low temperature at specific time of day
as set by program pins.
1FLIP-UP COVER. Lift up to set clock for
energy savings and normal temperature
periods.
4
2
1
3
M7318
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.
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.
16 MERCURY BULB AND BIMETAL ELE-
MENT (2). Provide automatic temperature
control by switching the heating or cooling
system on or off.
69
10 12 8 713 14 15
11 16
M7316
5
4
569-0639—1

Features of Your
Thermostat 2THERMOSTAT COVER. Lift up and
remove to adjust heat anticipator.
3THERMOMETER. Provides accurate room
temperature reading.
4PROGRAM INDICATOR. Blue indicates low
temperature is in effect; red indicates high
temperature is in effect.
5CLOCK. Provides a 24-hour slotted dial to
hold the programming pins.
6CLOCK HANDS. Turn minute hand
clockwise to match the correct AM or
PM time to the time indicator.
7TIME 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.
8 PROGRAM INDEX WHEEL. Controls high
and low temperature at specific time of day
as set by program pins.
1FLIP-UP COVER. Lift up to set clock for
energy savings and normal temperature
periods.
4
2
1
3
M7318
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.
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.
16 MERCURY BULB AND BIMETAL ELE-
MENT (2). Provide automatic temperature
control by switching the heating or cooling
system on or off.
69
10 12 8 713 14 15
11 16
M7316
5
4
569-0639—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
AUTO OFF COOL HEATON
FAN
B
O
W
Y
R
G
M1809
18
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.
NOTE: You may override the time program by
setting both the red and blue levers to the
same temperature setpoint.
For Cooling:
■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
sleeping or your home is unoccupied.
8
9
10
12
11
1
2
3
4
5
6
7
8
9
10
12
11
1
2
3
4
5
6
7
50 60 70 80
12
6
3
9
50 60 70 80
HIGH
TEMPERATURE
SETTING
LEVER
(RED MARK)
LOW TEMPERATURE
SETTING LEVER
(BLUE MARK)
M1520
Fig. 1—Setting high and low temperature levers.
6
769-0639—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
AUTO OFF COOL HEATON
FAN
B
O
W
Y
R
G
M1809
18
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.
NOTE: You may override the time program by
setting both the red and blue levers to the
same temperature setpoint.
For Cooling:
■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
sleeping or your home is unoccupied.
8
9
10
12
11
1
2
3
4
5
6
7
8
9
10
12
11
1
2
3
4
5
6
7
50 60 70 80
12
6
3
9
50 60 70 80
HIGH
TEMPERATURE
SETTING
LEVER
(RED MARK)
LOW TEMPERATURE
SETTING LEVER
(BLUE MARK)
M1520
Fig. 1—Setting high and low temperature levers.
6
769-0639—1

Setting Subbase Switches (If Applicable)
The subbase system switch controls system
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.
AUTO—In cooling only application, only cooling
operates. In heating only applications, only
heating operates.
The subbase fan switch controls fan operation
as follows:
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.
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.
Inserting Clock Batteries
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.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
M7188
Fig. 2—Inserting Clock Batteries.
8
969-0639—1

Setting Subbase Switches (If Applicable)
The subbase system switch controls system
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.
AUTO—In cooling only application, only cooling
operates. In heating only applications, only
heating operates.
The subbase fan switch controls fan operation
as follows:
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.
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.
Inserting Clock Batteries
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.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
M7188
Fig. 2—Inserting Clock Batteries.
8
969-0639—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.
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.
Daylight Savings Time
When Daylight Savings Time starts, move the
minute hand carefully in a clockwise direction Fig. 3—Setting the clock.
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.
TIME INDICATOR ARROW
MINUTE
HAND
TIME
INDICATOR
ARROW
M1813
PROGRAM DIAL
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.
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.
■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
10
11 69-0639—1
24-HOUR PROGRAM DIAL
(GRAY AREA FOR
NIGHT SETTINGS
FLIP-UP
COVER
PROGRAM
PINS
THERMOSTAT
COVER
PROGRAM PIN SLOT
PROGRAM INDEX WHEEL
PROGRAM PIN
STORAGE
TIME INDICATOR
ARROW
MANUAL PROGRAM
ADVANCE BUTTON M7319
Fig. 4—Program Components.