Heating/Cooling
Thermostat and Subbase or
Heating or Cooling Thermostat
and Wallplate
T8195A,B/Q682
OWNER’S MANUAL
69-0563-2
Table Of Contents
PAGE
Features Of Your Thermostat........................................................................................................... 4
Setting The Temperature ................................................................................................................. 7
Setting Subbase Switches................................................................................................................ 8
Inserting Timer Backup Batteries ..................................................................................................... 9
Setting The Timer ........................................................................................................................... 10
Programming .................................................................................................................................. 11
Troubleshooting .............................................................................................................................. 14
Servicing The Thermostat .............................................................................................................. 21
Warranty ......................................................................................................................................... 23
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8
9
PROGRAM INDEX WHEEL. Controls high
and low temperature at specific time of
day as set by program pins.
PROGRAM PINS. Must be inserted into
24-hour timer dial slots to control program
index wheel.
Features OfYour Thermostat
1
FLIP-UP COVER. Lift it up to set timer for
energy savings and comfort temperature
periods.
2
3
4
THERMOSTAT COVER. Lift up to adjust
timer.
THERMOMETER. Provides accurate room
temperature reading.
TEMPERATURE SETTING LEVERS. Left
(blue mark) controls the low temperature, right
(red mark) controls the high temperature.
TIMER. This timer provides a 24-hour
slotted dial to hold the programming pins.
TIMER SETTING KNOB. Turn clockwise
to match the correct a.m. or p.m. time to
the time indicator.
4
2
1
5
6
7
TIME INDICATOR. Arrow head indicates
time for 24-hour dial.
M8723
3
4
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9
5
6
11
12
M8744
M8745
7
10
8
10 PIN SLOTS. Located on 24-hour dial at
10-minute intervals for program pin
insertion.
11 MERCURYBULBANDBIMETALELEMENT
(2). Provide automatic temperature control
by switching the heating or cooling system
on and off.
12 WALLPLATE. Provides mounting base
and wiring connections for heating or
cooling thermostat without system or fan
switching.
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13 Q682 SUBBASE. Provides mounting base,
wiring connections and manual switching
control for heating/cooling thermostat.
O
B
R
G
W
Y
13
FAN
COOL
ON
AUTO
HEAT
OFF
M1551
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Setting The Temperature
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 tem-
perature you want for normal comfort periods.
HIGH
LOW TEMPERATURE
SETTING LEVER
TEMPERATURE
SETTING
LEVER
70
60
80
50
NOTE: You may override the time program by
setting both the red and blue levers to the
same temperature setpoint.
50 60 70 80
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.
M8586
Fig. 1—Setting high and low
temperature levers.
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The subbase fan switch controls fan
operation as follows:
ON—Fan operates continuously.
AUTO—Fan operates with cooling equipment
as contolled by the thermostat or with the
heating equipment as controlled by the
thermostat in heating and cooling.
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 system is controlled by the
thermostat. Heating system is Off.
OFF— Both the heating and cooling systems
are Off. If the fan switch is at the AUTO
position, the fan is also off.
ON—In a cooling only application, only cooling
operates. In a heating only application, only
heating operates.
To switch positions, use thumb or index
finger to slide lever to desired position. Switch
lever must stop in the detent over desired
function indicator mark for proper circuit
operation.
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BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
Inserting Timer Batteries
(Optional)
Power is supplied to the timer by the 24 Vac
transformer. Two AAA alkaline backup batter-
ies (not included) may be installed to supply
power to the timer if power is interrupted due to
power failure. Install the batteries in the
thermostat as shown in Fig. 2. Once a year or
when batteries are dead, replace with two new
AAA alkaline batteries. We recommend
Energizer® batteries.
M8585
Fig. 2—Inserting timer backup batteries.
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PROGRAM DIAL
Setting The Timer
PROGRAM
PIN (6)
Lift thermostat flip-up cover and you will find
the 24-hour program dial, slotted in 10-minute
increments. Adjust the timer to the current time
TIMER
SETTING
KNOB
by carefully turning the knob clockwise
not reverse the knob.
Do
When time is correctly set, the Time
Indicator Arrow (See Fig. 3) will point to the
correct time and corresponding daytime (light)
or nighttime (dark) band of the program dial.
TIME
INDICATOR
ARROW
EXAMPLE: For 11 p.m., time indicator arrow will
point directly to dark band on dial. For 11 a.m.,
the arrow will point to light band on dial.
M821A
Fig. 3—Setting the timer.
Daylight Savings Time
When Daylight Savings Time starts, carefully move the knob clockwise
one hour. When
Daylight Savings Time ends, carefully move the knob clockwise
the knob or damage to the timer mechanism may occur.
23 hours. Do not reverse
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pin storage area. You can set up to six tempera-
ture changes with the pins supplied. We
recommend at least five hours for each energy
savings period.
Programming
You can program your thermostat to
automatically lower and raise the temperature
one or more times every 24 hours.
24-HOUR PROGRAM DIAL
(GRAY AREA FOR NIGHT SETTINGS)
Before Setting Your Program
FLIP-UP
COVER
Lift thermostat flip-up cover and you’ll find
the 24-hour program dial. The slots on the
program dial (Fig. 4) are for the program pins
which can be inserted at ten-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
has been 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 period). Two
additional sets of pins are located in the program
PROGRAM
PINS
THERMOSTAT
COVER
PROGRAM
PIN SLOT
PROGRAM INDEX WHEEL
PROGRAM
PIN STORAGE
TIME INDICATOR ARROW
M7348
Fig. 4—Program components.
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To change the pins or add a new energy
savings period—
program dial that’s one-half hour before this
time and insert a red pin. The half-hour head
start gives the furnace time to heat the house
before you wake up or arrive home.
•
To insert a pin, push it straight into the
selected notch on the program dial until it’s
completely seated.
•
To remove a pin, press against program dial
and pull the pin straight out. Do not attempt
to change a pin if it is engaged with the
program index wheel.
WINTER
PROGRAM
SUMMER
1
•
On heating-cooling systems, you must
remove the program pins from the heating
program to set new times for your cooling
program. Write down your colors and time
for reprogramming at the next heating
season. Also, you may want to change the
temperature setting lever positions.
PROGRAM
TEMPERATURE
PIN IN
TEMPERATURE
PIN IN
°C
14
CONTROL
°F
58
°C
CONTROL
°F
BLUE
RED
80
27
RED
BLUE
RED
BEGINS
10:00 PM
NIGHT
ENERGY
SAVING
PERIOD
ENDS
6:00 AM
68
58
68
20
14
20
24
27
24
75
80
75
DAY
BEGINS
7:30 AM
BLUE
RED
ENERGY
SAVING
PERIOD
ENDS
4:00 PM
BLUE
Setting the Heating Program
Decide when you want the temperature to
reach the comfort level. Find the notch on the
1
NOT APPLICABLE ON HEATING-ONLY MODEL.
M8677
Fig. 5—Program examples.
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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 furnace will be off until room
temperature drops to the energy savings
setpoint.
Setting the Cooling Program
Decide when you want the temperature to
reach the comfort level. Find the notch on the
program dial that’s one-half hour before this
time and insert a blue pin. The half-hour head
start gives the air conditioner time to cool the
house before you wake up or arrive home.
Decide when you want the energy savings
period to start and insert a red pin at the notch
that corresponds to this time. After the red pin
engages, the air conditioner will be off until
room temperature rises to the energy savings
setpoint.
You can set both a day and night program.
See Fig. 5. for program examples.
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Troubleshooting
Your Honeywell thermostat requires little or no attention. Most problems can generally be
traced to the following:
Problem
No heat.
Check
Action
— system switch. May be in OFF
Move system switch to HEAT position.
or COOL position.
1
— 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 per furnace manufacturers
instructions.
— R and W 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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Troubleshooting (continued)
Problem
Check
Action
No heat (continued). — other problem.
Contact a qualified service technician for
assistance.
Energy savings
temperature program
12 hours off.
— program dial for proper day or
Turn timer ahead 12 hours. Move setting knob
night phase.
clockwise
only.
Rooms do not warm
up at programmed
— timer program for heating
Move red pin one-half hour earlier on the
system. May need more time to program dial.
warm up rooms.
time.
2
Temperature change — programs pins for correct time
Relocate pins to desired settings.
occurs at the wrong
time.
locations.
Room temperatures
are not correct.
— positions of thermostat setpoint Reset to desired temperatures.
levers.
— position of subbase system
switch (heating-cooling model).
Move to desired operating position.
(continued)
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15
Troubleshooting (continued)
Problem
Check
— thermostat circuits.
Action
Room temperatures
are not correct
(continued).
HEATING-ONLY SYSTEM—Move temp-
erature 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 temp-
erature 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 temperature setting
levers 5°F (3°C) above room temperature.
Heating system should start. With system
switch at COOL, move temperature setting
levers 5°F (3°C) below room temperature.
Cooling system should start. If the systems
do not operate, call a qualified technician.
(continued)
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Troubleshooting (continued)
Problem
Check
Action
No cooling.
— system switch. May be in OFF
or HEAT position.
Move switch to COOL position.
1
— fuse or circuit breaker.
If fuse is blown or breaker tripped, replace or
reset.
— condenser switch position.
Located outdoors and may be
turned OFF.
Move to ON position.
— Y and R thermostat
connections.
Turn Off power to cooling system. Check for
correct terminal hookups. Repair any frayed or
broken wires. Firmly tighten all terminal
screws.
— other
Contact a qualified service technician for
assistance.
Timer is losing time.
— Power. May be interrupted.
Make sure power is On.
Make sure power is Off. Reset clock.
(continued)
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Troubleshooting (continued)
Problem
Check
Action
Timer is losing time
(continued).
— high limit control. If clock
powered through system trans-
former, power to clock and
equipment may be Off on
safety.
Wire separate transformer to power clock.
— filter. May be clogged. Safety
limit on equipment may cut off
power to system.
Replace filter and reset clock.
Timer does not run.
— voltage across the C and R
terminals.
Remove the thermostat from the wallplate or
subbase, and measure the voltage. Refer to
page 19 for cause and action.
(continued)
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Troubleshooting (continued)
Problem
Check
Action
— level position of thermostat.
Reinstall thermostat subbase. Use a spirit
level.
Thermostat setting
and thermometer.
reading disagree.
— area around thermostat for
drafts or radiant heat.
Thermostat should be about 5 ft (1.5m) above
floor on an inside wall. Contact qualified
service technician for change of location.
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 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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Voltage at Timer Terminals
Ac Voltage at
C-R Terminals
Possible Cause Check
1. System power is Off.
2. Short in timer power supply wiring. 2. Replace wiring.
Action
0 Vac
1. Restore power.
3. Limit switch contacts stuck open.
4. Transformer supplying power is
burned out.
3. Free or replace limit switch.
4. Replace transformer.
Up to 15 Vac.
15 to 30 Vac.
1. System transformer used to power 1. Use additional (separate)
the timer is inadequate.
2. Additional (separate) transformer
used to power the timer has
inadequate voltage.
transformer.
2. Install transformer with proper
secondary voltage.
1. Spring fingers on thermostat not
making proper contact with
subbase terminals.
1. Rebend spring fingers to a
45 degree angle to ensure
proper contact.
2. Timer has failed.
2. Replace thermostat.
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If the readings are different, insert a small
screwdriver in the thermometer slot, shown in
Fig. 6, and turn it until both thermometers read
the same.
Replace thermostat cover and put the
system into operation.
Servicing The Thermostat
Thermometer Adjustment
The thermometer has been accurately
calibrated at the factory and should only
need adjustment if it has been dropped or
mishandled.
If the setpoint lever and the thermostat
reading do not agree, follow the procedure
below.
THERMOMETER
BACKSIDE OF
SLOT
FLIP-UP COVER
Remove thermostat cover and open the flip-
up cover.
INSERT AND TURN
SCREWDRIVER
Set the thermostat cover on a table near
thermometer of known accuracy.
Allow at least five minutes for cover ther-
mometer to sense area temperature, then
compare the readings. Be careful not to touch
thermometer or breathe on it.
M1810
If the readings are the same, replace cover
and put the system into operation.
Fig. 6—Thermometer adjustment.
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For all questions concerning this thermostat, please read and follow the instructions. If
additional assistance is needed, call our toll-free Customer assistance Center group number at
1-800-468-1502, Monday-Friday, 7:00 a.m. - 5:30 p.m. Central time. Before you call, please have
the following information available: make and model of furnace, thermostat and air conditioner.
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Limited One-Year Warranty
Honeywell warrants this product 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 dealer or contractor 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 Inc.
Return Goods Department
1050 Berkshire Lane
Plymouth, MN 55441-4437
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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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
D.F. ©Honeywell Inc. 1994 Rev. 12-94 Form Number 69-0563—2
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