Page 1
Clock Thermostat
Fuel Saver
• Heat Only—CT1800
• Heat/Cool—CT1801
• Central Heat/Cool or Single Stage Heat Pump without Auxiliary Heat—CT1802
Heating-Only Thermostat and Wallplate or a Heating/Cooling Thermostat and Subbase
Models CT1800, CT1801, CT1802
OWNER’S MANUAL
69-0395-2
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2 69-0395—2
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Welcome to the world of energy savings with your new Honeywell Fuel Saver Thermostat. The
Honeywell name is your assurance of accurate control and reliable operation for years to come.
Your new thermostat will automatically control the temperature in your home to provide a high
level of comfort plus energy savings when programmed according to the instructions in this manual.
Recycling Notice
This control contains mercury in a sealed tube. Do
M3375
not
place control in the trash a 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.
3 69-0395—2
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Table of Contents
PAGE
Features Of Your Thermostat ........................................................................................................... 5
Reviewing Your Family Schedule ..................................................................................................... 8
Setting The Temperature .................................................................................................................. 9
Setting Subbase Switches .............................................................................................................. 10
Inserting Clock Batteries ................................................................................................................. 11
Setting The Clock ............................................................................................................................ 12
Programming................................................................................................................................... 13
Troubleshooting .............................................................................................................................. 18
Servicing The Thermostat ............................................................................................................... 22
System On-Time Adjustment .......................................................................................................... 22
Thermometer Adjustment................................................................................................................ 23
Limited One-Year Warranty ............................................................................................................ 25
4 69-0395—2
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Features Of Your Thermostat
1 FLIP-UP COVER. Lift it up to set clock for
energy savings and normal temperature
periods.
2 THERMOSTAT COVER. Lift up and
remove to adjust heat anticipator or install
batteries.
3 THERMOMETER. Provides accurate
room temperature reading.
4 CLOCK. This clock provides a 24-hour
slotted dial to hold the programming pins.
5 CLOCK HANDS. Turn minute hand
clockwise to match the correct AM
or PM time to the time indicator
6 TIME INDICATOR. Arrowhead indicates
time for 24-hour dial.
7 PROGRAM INDEX WHEEL. Controls
high and low temperature at specific time
of day as set by program pins. Can be
moved to temporarily override a schedule.
1
5 69-0395—2
2
3
M9653
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8 TEMPERATURE SETTING LEVERS.
Left (blue mark) controls the low temperature; right (red mark) controls the high
temperature.
9 PROGRAM PINS. Must be inserted into
24-hour clock dial slots to control program
index wheel.
10 PIN SLOTS. Located on 24-hour dial at
ten-minute intervals for program pin
insertion.
11 HEAT ANTICIPATOR SCALEPLATE.
Calibrated to match the heating system
current draw in amperes.
12 ANTICIPATOR SETTING LEVER. Must
be adjusted to match the heating system
primary control current.
13 BULB AND BIMETAL ELEMENT
(2). Provide automatic temperature
control by switching on and off the
heating or cooling system.
14 AAA ALKALINE BATTERIES (2).
Included to provide power to the clock.
14 4 5
121167109
6 69-0395—2
13
8
M9654
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15 WALLPLATE. Provides mounting base
and wiring connections for heating-only
thermostat.
16 SUBBASE. Provides mounting base,
wiring connections and manual switching
control for heating/cooling thermostat.
15
M2421
O
B
R
W
G
Y
16
FAN
AUTO OFF
HEATON
COOL
M2411
7 69-0395—2
Page 8
Reviewing Your Family Schedule
Write the answers to the following questions in the spaces provided to determine the program
that fits your family schedule.
SUMMER WINTER
What comfort temperature would you like to maintain? ______ ______
What energy savings temperature would you like to maintain? ______ ______
What time does the first person get up in the morning? ______ ______
Is anyone home all day? ______ ______
What time does the last person leave in the morning? ______ ______
What time does the first person return home in the evening? ______ ______
What time does the last person go to bed? ______ ______
8 69-0395—2
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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 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 (not applicable on
heating-only model):
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. See Fig. 1.
LOW TEMPERATURE
SETTING LEVER
12
9
6
80
50506060707080
3
HIGH
TEMPERATURE
SETTING LEVER
M8279
Fig. 1—Setting high and low temperature
levers.
9 69-0395—2
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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.
AUTO: 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 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 lever to desired position. Switch
lever must stop in detent over desired function
indicator mark for proper circuit operation.
10 69-0395—2
Page 11
Inserting Clock Batteries
Power is supplied to the clock by two AAA
alkaline batteries (included). 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
operate without batteries, but will not operate
as a fuel saver.
®
batteries. The thermostat itself will
BATTERY LOCATION
FOR (2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
M9619
Fig. 2—Inserting clock batteries.
11 69-0395—2
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Setting The Clock
Lift thermostat flip-up cover and you’ll 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 the
clockwise direction. Do
minute hand.
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.
not
reverse the
direction one hour. When daylight saving
time ends, move the minute hand carefully in
a clockwise direction 23 hours. Do
not
reverse the minute hand, or damage to the
clock mechanism may occur.
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
Daylight Saving Time
When daylight saving time starts, move the
minute hand carefully in a clockwise
TIME
INDICATOR
ARROW
M2501
Fig. 3—Setting the clock.
12 69-0395—2
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Programming
You can program your thermostat to
automatically lower and raise the temperature
one or more times every 24 hours.
Refer to the energy savings chart on the
back cover for typical heating and cooling
savings with your new thermostat.
Before setting your program:
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 10-minutes 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 AM
for high temperature (comfort period); a blue pin
is inserted at 10:00 PM for low temperature
(energy saving period).
24 HOUR PROGRAM DIAL
(GRAY AREA FOR NIGHT
SETTING)
PROGRAM
PIN SLOT
THERMOSTAT COVER
PROGRAM PINS FLIP-UP
PROGRAM
INDEX WHEEL
TIME
INDICATOR
ARROW
COVER
PROGRAM
PIN
STORAGE
M9614
Fig. 4—Program components.
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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.
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 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, you must
reset the pins when the seasons change.
You will 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 half-hour head start gives
the furnace time to heat the house before you
wake up or arrive home.
WINTER SUMMER
°C
14
20
14
20
PROGRAM
PIN IN
CONTROL
BLUE
RED
BLUE
RED
TEMPERATURE
°F
80
75
80
75
TEMPERATURE
°F
BEGINS
NIGHT
10:00 PM
ENERGY
SAVING
ENDS
PERIOD
6:00 AM
DAY
BEGINS
ENERGY
7:30 AM
SAVING
ENDS
PERIOD
4:00 PM
1 NOT APPLICABLE ON HEATING-ONLY MODEL.
58
68
58
68
Fig. 5—Programming examples.
14 69-0395—2
°C
27
24
27
24
1
PROGRAM
PIN IN
CONTROL
RED
BLUE
RED
BLUE
M8677
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Decide when you want the energy savings
period to start and insert a
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.
You can set both a day and a night program. See Fig. 5 for program examples.
blue
pin at the
Setting the cooling program (not
applicable on heating-only model):
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
the air conditioner time to cool the house
before you wake up or arrive home.
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.
15 69-0395—2
blue
pin. The half-hour head start gives
Decide when you want the energy savings
Page 16
Temporarily changing the program
You may temporarily raise or lower the
temperature if you come home early, stay up
late, plan to be out for the evening, leave on
vacation, etc. You can make a temporary
change one of two ways—move the program
index wheel or push the setting levers together.
A move of the program index wheel will
change the program just until the next regularly
scheduled change is due.
• Lift the thermostat cover.
• Move the program index wheel counterclockwise so the time indicator arrow
points to the desired color on the dial.
EXAMPLE: If you are currently at the high
temperature period and want to switch to
the low temperature period, move the wheel
from red to blue. If you are currently at the
low temperature period and want to switch
to the high temperature period, move the
wheel from blue to red. The change will be
in effect until the next regularly scheduled
change.
DISCO
INDICADOR
DE PROGRAMA
FLECHA
INDICADORA
DE LA HORA
MS2499
16 69-0395—2
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Pushing the setting levers together will hold
a particular temperature until you change the
levers back. This method is recommended for a
long-term absence.
• Simply push both levers to the temperature you wish for system control. This
temperature will stay in effect until you
change the levers back.
607080
50
50
60 70 80
M2500
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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. — system switch. May be in OFF or
COOL position.
— fuse or circuit breaker. If blown or tripped, replace fuse or reset
— furnace power switch. May be
OFF.
— pilot flame (where applicable).
May be out.
— RH and W thermostat
connections.
Check Action
1
1 Not applicable on heating-only model.
18 69-0395—2
Move system switch to HEAT position.
breaker.
Move switch to ON.
Relight pilot flame per furnace
manufacturer instructions.
Turn Off power to furnace. Check for
correct terminal hookups. Repair any
frayed or broken wires. Firmly tighten all
terminal screws.
(continued)
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Troubleshooting
Problem Check Action
No heat (continued). — other. Contact a qualified service technician for
Energy savings
temperature program 12
hours off.
Rooms do not warm up
at programmed time.
Temperature change
occurs at the wrong
time.
Room temperatures are
not correct.
(continued)
— program dial for proper day or
— clock program for heating system.
— program pins for correct time
— positions of thermostat setpoint
— position of subbase system
night phase.
May need more time to warm up
rooms.
locations.
levers.
switch.
1
assistance.
Turn clock ahead 12 hours Move minute
hand clockwise only.
Move red pin one-half hour earlier on the
program dial.
Relocate pins to desired settings.
Reset to desired temperatures.
Move to desired operating position.
(continued)
1 Not applicable on heating-only model.
19 69-0395—2
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Troubleshooting
Problem Check Action
Heat-on time too short. — anticipator setting. (See Fig. 6 for
Heat-on time too long. — anticipator setting. (See Fig. 6 for
No cooling. — system switch. May be in OFF or
(continued)
anticipator location.)
anticipator location.)
1
HEAT position.
— fuse or circuit breaker. If fuse is blown or breaker tripped,
— condenser switch position.
Located outdoors and may be
turned Off.
— Y, G, RC thermostat connections. Turn Off power to cooling system. Check
1 Not applicable on heating-only model.
20 69-0395—2
Increase anticipator setting by 0.05.
Observe heating system operation.
Decrease anticipator setting by 0.05.
Observe heating system operation.
Move switch to COOL position.
replace or reset.
Move to ON position.
for correct terminal hookups. Repair any
frayed or broken wires. Firmly tighten all
terminal screws.
(continued)
Page 21
Troubleshooting
Problem Check Action
No cooling (continued). — other. Contact a qualified service technician for
Clock does not run. — batteries may not have been
Thermostat setting and
thermometer reading
disagree.
(continued)
assistance.
installed.
— batteries may need replacement. Replace with two new AAA alkaline
— level position of thermostat. Reinstall thermostat wallplate or subbase.
— area around thermostat for drafts
or radiant heat.
— calibration of thermometer. See Thermometer Adjustment section.
Install as shown in Fig. 2.
batteries as described in Inserting Clock
Batteries section.
Use a spirit level.
Thermostat should be about 5 ft (1.5m)
above floor on an inside wall. Contact
qualified service technician for change of
location.
If you have questions regarding your Honeywell Fuel Saver Thermostat please visit our web
site at www.honeywell.com/yourhome, or call the customer information line at 1-800-468-1502.
21 69-0395—2
Page 22
Servicing The Thermostat
System On-Time Adjustment
If the thermostat seems to cycle the heating
system too fast or too slow, adjust the heating
system on-time by moving the anticipator
setting lever one indicator mark at a time (Fig. 6).
A higher setting will increase heating system ontime length; a lower setting will decrease heating
system on-time length. Observe the heating
system operation after each adjustment.
The heat anticipator must be correctly set. An
incorrect setting can result in room temperature
swings or burn out the anticipator, which would
void the thermostat warranty.
IMPORTANT:
setting of 1.3 times the valve current rating.
Most hot water systems require a
ANTICIPATOR
SCALEPLATE
ANTICIPATOR
SETTING LEVER
M9616
Fig. 6—Heat anticipator setting.
22 69-0395—2
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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 thermometer
reading do not agree, follow the procedure
below.
• Remove thermostat cover and open the
flip-up cover.
• Set the thermostat cover on a table near
a thermometer of known accuracy.
• Allow at least five minutes for the cover
thermometer to sense the area temperature; then compare the readings. Be
careful not to touch the thermometer or
breathe on it.
• If the readings are the same, replace the
cover and put the system into operation.
• If the readings are different, insert a small
screwdriver in the thermometer slot
shown in Fig. 7 and turn it until both
thermometers read the same.
• Replace thermostat cover and put the
system into operation.
THERMOMETER
SLOT
BACKSIDE OF
FLIP-UP COVER
INSERT AND TURN
SCREWDRIVER
M1810
Fig. 7—Thermometer adjustment.
23 69-0395—2
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Toll-free Consumer Service
For all questions concerning this thermostat, please read and follow the instructions. If you
have questions regarding your Honeywell Fuel Saver Thermostat please visit our web site at
www.honeywell.com/yourhome, or call the customer information line at 1-800-468-1502.
Before you call, please have the following information available: thermostat model number and
date code, kind of heating/cooling system (i.e., hot water, warm air, oil, gas, etc.) and number of
wires connected to the thermostat.
24 69-0395—2
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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) return it, with a bill of sale or other dated proof of purchase, to the retailer 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:
in United States—Honeywell Return Goods in Canada—Honeywell Limited/Honeywell Limitée
Dock 4 MN10-3860 35 Dynamic Drive
1885 Douglas Drive North Scarborough, Ontario M1V 4Z9
Golden Valley, MN 55422
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 rep ace 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, Customer Assistance MN10-1461, 1885
Douglas Drive North, Golden Valley, MN 55422-4386. In Canada, write: Retail Products ON15 -ZH Honeywell Limited/Honeywell Limitée, 35 Dynamic
Drive, Scarborough, Ontario M1V 4Z9.
25 69-0395—2
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TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA
Savings for Once-A-Day
10°F (5°C) decrease
30%
28%
26%
24%
22%
20%
18%
16%
14%
12%
10%
8%
6%
Approximate percentage of energy cost savings
4%
2%
Minneapolis
St. Paul
Montreal
Ottawa
Toronto
Edmonton
Regina
Winnipeg
Calgary
Halifax Vancouver Denver
Moncton
North Bay
Quebec
St. John's
Buffalo
Cleveland
Milwaukee
Savings for Twice-A-Day
10°F (5°C) decrease*
Boston
Des Moines
Chicago
Omaha
Detroit
Salt Lake
Pittsburgh
City
Indianapolis
*Based on 10°F (5°C) decrease—(5°F (3°C) decrease
gives approximately 55 percent of these savings).
Cincinnati
Kansas City
St. Louis
Columbus
New York
Philadelphia
Seattle
Savings for 5°F (3°)
summer increase
Louisville
Portland
Wash., D C
San
Francisco
26 69-0395—2
Dallas
Atlanta
Los Angeles
San Diego
M2416A
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27 69-0395—2
Page 28
Home and Building Control Home and Building Control Helping You Control Your World
Honeywell Inc. Honeywell Limited—Honeywell Limitée
1985 Douglas Drive North 155 Gordon Baker Road
Golden Valley, MN 55422 North York, Ontario
M2H 2C9
www.honeywell.com/yourhome
D.F. • Rev. 1-96 • ©Honeywell Inc. 1996 • Printed in U.S.A. • • Form Number 69-0395—2
M3375
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