Honeywell Q682 User manual

Heating or Cooling
Thermostat and Wallplate
or Heating/Cooling
Thermostat and Subbase
T8190A/191108AJ, Q682
D.F. Rev. 9-94 ©Honeywell Inc. 1994 Form Number 69-0643—1
M3375

269-0643—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.
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
significantly lower your fuel costs, while awaken-
ing (or returning home) to a comfortable
temperature.
Read this manual to learn how to use your
new thermostat.

369-0643—1
Table of Contents
Page
Features of Your Thermostat ............................................................................................................ 4
Setting the Temperature .................................................................................................................. 7
Inserting Timer Batteries ................................................................................................................... 8
Setting the Timer ............................................................................................................................... 9
Programming................................................................................................................................... 10
Setting Subbase Switches .............................................................................................................. 13
Troubleshooting .............................................................................................................................. 14
Servicing the Thermostat ................................................................................................................ 22
Cycle Rate Adjustment ............................................................................................................... 22
Thermometer Adjustment ........................................................................................................... 23
Warranty.......................................................................................................................................... 27

469-0643—1
FeaturesOf Your
Thermostat
1FLIP-UP COVER. Lift it up to set clock for
energy saving and normal temperature
periods.
2THERMOSTAT COVER. Lift up and remove
to adjust heat anticipator.
3THERMOMETER. Provides accurate room
temperature reading.
4TEMPERATURE SETTING LEVERS. Left
(blue mark) controls the low temperature,
right (red mark) controls the high tempera-
ture.
5TIMER. This timer provides a 24-hour
slotted dial to hold the programming pins.
6TIMER SETTING KNOB. Turn clockwise
to match the correct AM or PM time to
the time indicator.
7TIME INDICATOR. Arrow head (triangle
shape) indicates low (blue) temperature
setting or high (red) temperature setting in
control on program index wheel. Also
indicates time on 24-hour dial.
4
3
12
M7349

569-0643—1
8PROGRAM INDEX WHEEL. Controls high
and low temperature at specific time of day
as set by program pins.
9PROGRAM PINS. Must be inserted into 24-
hour timer dial slots to control program
index wheel.
10 PIN SLOTS. Located on 24-hour dial at 10-
minute intervals for program pin insertion.
11 PROGRAM DIAL. 24-hour dial with light
band to indicate daytime and dark band to
indicator nighttime.
12 HEAT ANTICIPATOR SCALEPLATE.
Calibrated to match the heating system
current draw in amperes.
13 ANTICIPATOR SETTING LEVER. Must be
adjusted to match the heating system
primary control current.
14 MERCURY BULB AND BIMETAL ELE-
MENT (2). Provide automatic temperature
control by switching the heating or cooling
system on or off.
610 14 5
911 8712 13
M7350

669-0643—1
15 WALLPLATE (Included with thermostat.)
Provides mounting base and wiring
connections for heating-only or cooling-only
thermostat.
16 SUBBASE (Optional, 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.
AUTO OFF COOL HEATON
FAN
B
O
W
Y
R
G
M 719
16
M2421
15

769-0643—1
Fig. 1—Setting high and low temperature
setting levers.
Setting theTemperature
ForHeating:
■Set the left lever (blue mark) to the energy
saving 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.
ForCooling:
■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
saving temperature you want when you are
sleeping or your home is unoccupied.
50 60 70 80
50 60 70 80
HIGH
TEMPERATURE
SETTING
LEVER
LOW TEMPERATURE
SETTING LEVER
M8586

869-0643—1
Inserting Timer Batteries
Power is supplied to the timer by the 24 Vac
transformer, by two AAA alkaline batteries
(included), or by the heating or cooling control
circuit. Backup batteries may be installed to
supply power to the timer if power is interrupted
when using a 24 Vac powering method. Install
batteries in 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. Properly dispose of old
batteries.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
M8585
Fig. 2—Inserting timer batteries.

969-0643—1
Setting theTimer
■Lift thermostat flip-up cover and you’ll find the
24-hour program dial, slotted in 10-minute
increments. Adjust the timer to the current
time by carefully turning the knob clockwise
. DO NOT reverse the knob.
■When time is correctly set, 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.
DaylightSavingTime
When Daylight Saving Time starts, move the
knob carefully in a clockwise direction one
hour. When Daylight Saving Time ends, move
Fig. 3—Setting the timer.
the knob carefully in a clockwise direction 23
hours. Do NOT reverse the knob, or damage to
timer mechanism may occur.
TIME INDICATOR ARROW
TIMER
SETTING
KNOB
TIME
INDICATOR
ARROW
M 821
PROGRAM DIAL
PROGRAM
PIN (6)

10 69-0643—1
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
Notice the slots on the program dial (Fig. 4).
The dial is slotted for the program pins that can
be inserted at 10-minute intervals.
■Lift thermostat flip-up cover and you will 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 has been preprogrammed. A
red pin is inserted at 6:00 AM for high
Fig.4—Programcomponents.
24-HOUR PROGRAM DIAL
(GRAY AREA FOR NIGHT SETTINGS)
FLIP-UP
COVER
PROGRAM
PINS
THERMOSTAT
COVER
PROGRAM
PIN SLOT
PROGRAM INDEX WHEEL
TIME INDICATOR ARROW
PROGRAM
PIN STORAGE M7348

11 69-0643—1
temperature (comfort period); a blue pin is
inserted at 10:00 PM for low temperature
(energy saving 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 recom-
mend at least five hours for each energy
saving period.
■To change the pins or add a new energy
savings 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 desired positions. See
Setting Subbase Switches section.
•On heating/cooling systems, you must
reset the pins when the seasons change.
You will also probably want to change the
lever positions.
To set 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 gives the
furnace time to heat the house before you
awaken or arrive home.
■Decide when you want the energy saving
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.
■You can set both a day and a night program.
See Fig. 5 for program examples.

12 69-0643—1
To set 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 gives the air
conditioner time to cool the house before you
awaken or arrive home.
■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 the
room temperature rises to the energy saving
setpoint.
WINTER SUMMER
TEMPERATURE PROGRAM
PIN IN
CONTROL
NIGHT
ENERGY
SAVING
PERIOD
DAY
ENERGY
SAVING
PERIOD
BEGINS
10:00 PM
ENDS
6:00 AM
BEGINS
7:30 AM
ENDS
4:00 PM
TEMPERATURE PROGRAM
PIN IN
CONTROL
°C
27
24
27
24
RED
BLUE
RED
BLUE
°F
58
68
58
68
°C
14
20
14
20
°F
80
75
80
75
BLUE
RED
BLUE
RED
M1690B
Fig. 5—Programming examples.

13 69-0643—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 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 cooling-only applications, only cooling
will operate. In heating-only applications, only
heating will operate.
The subbase fan switch controls fan opera-
tion as follows:
ON—Fan operates continuously.
AUTO—Fan operates with cooling equipment as
controlled by the thermostat or with the
heating equipment as controlled by the
plenum fan switch. In electric heat, heat
pump and fan coil systems, the fan is
controlled by the thermostat in heating and
cooling.
To switch positions, use thumb or index
finger to slide the lever to the desired position.
For proper circuit operation, switch lever must
stop in detent over desired function indicator
mark.

14 69-0643—1
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 Move system switch to HEAT position.
or COOL position.
—Fuse or circuit breaker. If blown or tripped, replace fuse or
reset breaker.
—Furnace power switch may be Move switch to ON .
OFF.
—Pilot flame may be out. Relight pilot flame according to furnace
manufacturer 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.
—Other. Contact a qualified service technician
for assistance.
2
(continued)

15 69-0643—1
Problem Check Action
Energy saving — Program dial for proper day Turn timer ahead 12 hours. Turn
temperature or night phase. knob clockwise only.
program is
12 hours.
Rooms do not — Timer program for heating Move red pin one-half hour earlier
warm up at the system may need more time on the program dial.
programmed to warm up rooms.
time.
Temperature — Program pins for correct time Relocate pins to desired settings.
change occurs locations.
at the wrong time.
Room temperatures — Positions of thermostat set Reset to desired temperatures.
are not correct. point levers.
—Position of subbase system Move to desired operating position.
switch (heating-cooling model).
Troubleshooting (Continued)
2
(continued)

16 69-0643—1
Troubleshooting (Continued)
Problem Check Action
Room —Thermostat circuits. Heating mode—Move temperature
temperatures setting levers 5°F [3°C] above room
are not correct temperature. Heating system should
(continued). start.
Cooling mode—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.
Burner-on time —Anticipator setting. (See Fig. 6 Increase anticipator setting by 0.05
too short. for anticipator location.) (e.g., 0.4 to 0.45). Observe burner
operation.
Burner-on time too —Anticipator setting. (See Fig. 6 Decrease anticipator setting by 0.05
long. for anticipator location.) (e.g., 0.45 to 0.4). Observe burner
operation.
(continued)

17 69-0643—1
No cooling. —System switch may be in OFF Move switch to COOL position.
or HEAT position.
—Fuse or circuit breaker. If fuse is blown or breaker tripped,
replace or reset. If fuse blows again,
call the heating and air conditioning
dealer.
—Condenser switch position. Move to ON position.
Located outdoors and may
be turned off.
—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.
Troubleshooting (Continued)
(continued)
1
Problem Check Action

18 69-0643—1
Problem Check Action
Thermostat setting —Level position of thermostat. Reinstall thermostat wallplate or
and thermometer subbase. Use a spirit level.
reading disagree. —Area around thermostat for Thermostat should be about 5 ft
drafts or radiant heat. [1.5m] above floor on an inside wall.
Contact qualified service technician for
change of location.
—Calibration of thermometer. See Thermometer Adjustment section.
Timer does not run. —Thermostat connections at the
two C terminals. If no
connections, timer needs
batteries in to run.
—Batteries may not have been Install as shown in Fig. 2.
installed.
—Batteries may need Replace with two new AAA alkaline
replacement. batteries as shown in Fig. 2.
—If new batteries are installed Replace thermostat.
and timer still does not run.
Troubleshooting (Continued)
(continued)
3

19 69-0643—1
Timer does not —Voltage across the two C Remove thermostat from the wallplate
run (continued). terminals. or subbase and measure the voltage.
Refer to Voltage at Timer Terminals
table for cause and reaction.
—Pins in program dial. If pins are Push down on pins to make sure they
not completely seated in are completely seated in program dial.
program dial, jamming with
index wheel can occur.
Timer loses time. —Power may be interrupted. Make sure power is on. Reset timer.
—High limit control. If timer Wire separate transformer to power
powered through system timer, or install backup batteries as
transformer, power to timer shown in Fig. 2.
and equipment may be off
on safety.
—Filter may be clogged. Safety Replace filter and reset timer.
limit on equipment can cut off
power to system.
Troubleshooting (Continued)
(continued)
Problem Check Action

20 69-0643—1
Problem Check Action
Timer loses time —Batteries may need Replace with two new AAA alkaline
(continued). replacement. batteries as shown in Fig. 2.
1Not applicable on model used in heating-only system.
2Not applicable on model used in cooling-only system.
3If timer is not battery powered, timer may still use batteries for backup.
Troubleshooting (Continued)
If this Troubleshooting section did not solve
the problem, call a qualified service technician
or the Honeywell Customer Assistance Center,
1-800-468-1502, Monday - Friday, 7:00 AM to
5:30 PM Central time for additional assistance.