B-Q682
Heating/Cooling
Thermostat and Subbase or
Heating or Cooling Thermostat
and Wallplate
T8195A,B/Q682
OWNER’S MANUAL
69-0563-2
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.
This thermostat meets California Title 24 requirements—mandatory installation of automatic
setback thermostats in new heating and cooling systems. During heating and cooling, this
thermostat will automatically lower and raise the temperature in your home one or more times
every 24 hours. This allows you to significantly lower your fuel costs, while awakening (or
returning home) to a comfortable temperature.
Read this manual to learn how to use your new thermostat.
Recycling Notice
This control contains mercury in a sealed tube. Do
M3375
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 an old control containing mercury in a sealed tube.
If you have questions, call Honeywell Inc. at 1-800-468-1502.
2 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
3 69-0563—2
Features Of Your Thermostat
1 FLIP-UP COVER. Lift it up to set timer for
energy savings and comfort temperature
periods.
2 THERMOSTAT COVER. Lift up to adjust
timer.
3 THERMOMETER. Provides accurate room
temperature reading.
4 TEMPERATURE SETTING LEVERS. Left
(blue mark) controls the low temperature, right
(red mark) controls the high temperature.
5 TIMER. This timer provides a 24-hour
slotted dial to hold the programming pins.
6 TIMER SETTING KNOB. Turn clockwise
to match the correct a.m. or p.m. time to
the time indicator.
7 TIME INDICATOR. Arrow head indicates
time for 24-hour dial.
8 PROGRAM INDEX WHEEL. Controls high
and low temperature at specific time of
day as set by program pins.
9 PROGRAM PINS. Must be inserted into
24-hour timer dial slots to control program
index wheel.
4
1
3
4 69-0563—2
2
M8723
9
5
6
11
10
8
7
M8745
10 PIN SLOTS. Located on 24-hour dial at
10-minute intervals for program pin
insertion.
11 MERCURY BULB AND BIMETAL ELEMENT
(2). Provide automatic temperature control
by switching the heating or cooling system
on and off.
12
M8744
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
W
Y
COOL
HEATON
M1551
13
FAN
R
G
AUTO OFF
6 69-0563—2
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 temperature 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 temperature 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.
LOW TEMPERATURE
SETTING LEVER
50
50
607080
60 70 80
HIGH
TEMPERATURE
SETTING
LEVER
M8586
Fig. 1—Setting high and low
temperature levers.
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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.
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.
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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