Honeywell CT1500 Thermostat User Manual

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Timer Thermostat  
Fuel Saver  
Heating-Only Thermostat and Wallplate or Heating/Cooling  
Thermostat and Subbase Models CT1500, CT1501, CT1502, CT1503  
Heat Only—CT1500  
Heat/Cool—CT1501  
Central Electric Heat/Cool or Single Stage  
Heat Pump without auxiliary heat—CT1502  
Millivolt Heat—CT1503  
OWNER’S MANUAL  
69-0333-6  
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 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 the control, or of an old control containing mercury in a sealed tube.  
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Table of Contents  
PAGE  
Features of Your Thermostat .............................................................................................. 4  
Reviewing Your Family Schedule ....................................................................................... 7  
Setting The Temperature .................................................................................................... 8  
Setting Subbase Switches .................................................................................................. 9  
Inserting Timer Batteries ................................................................................................... 10  
Setting The Timer.............................................................................................................. 11  
Programming..................................................................................................................... 12  
Temporarily changing the program .............................................................................. 15  
Troubleshooting ................................................................................................................ 17  
Servicing The Thermostat ................................................................................................. 21  
System on-time adjustment.......................................................................................... 21  
Thermometer adjustment ............................................................................................. 22  
Limited One-Year Warranty .............................................................................................. 27  
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1
Features ofYour Thermostat  
2
1
FLIP-UP COVER. Lift up cover to set timer  
for energy savings and normal tempera-  
ture periods .  
2
THERMOSTAT COVER. Lift up cover and  
remove to adjust heat anticipator or install  
batteries.  
3
4
5
THERMOMETER. Provides accurate room  
temperature reading.  
TIMER. Provides 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.  
3
M8750  
6
7
TIME INDICATOR. Arrowhead indicates  
time for 24-hour dial.  
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.  
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8
8
9
TEMPERATURE SETTING LEVERS.  
Left (blue mark) controls the low tempera-  
ture; right (red mark) controls the high  
temperature.  
14  
5
4
PROGRAM PINS. Must be inserted into  
2
4-hour timer dial slots to control program  
index wheel.  
1
1
1
1
0 PIN SLOTS. Located on 24-hour dial at  
ten minute intervals for program pin  
insertion.  
1 HEAT ANTICIPATOR SCALE PLATE.  
Calibrated to match the heating system  
current draw in amperes.  
2 ANTICIPATOR SETTING LEVER. Must be  
adjusted to match the heating system  
primary control current.  
3 BULB AND BIMETAL ELEMENT (2).  
Provides automatic temperature control by  
switching the heating or cooling system on  
and off.  
13  
12  
9
10  
7
6
11  
M8749  
14 AAA ALKALINE BATTERIES (2). Included  
to provide power to the timer.  
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1
5 WALLPLATE Provides mounting base and  
wiring connections for heating-only  
thermostat.  
1
6 SUBBASE Provides mounting base, wiring  
connections and manual switching control  
for heating/cooling thermostat.  
15  
M2421  
O
B
R
G
W
Y
16  
FAN  
COOL  
ON  
AUTO  
HEAT  
OFF  
M2411  
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ReviewingYour 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 times does the last person leave in the morning?  
What times does the first person return home in the evening?  
What time does the last person go to bed?  
___________  
___________  
___________  
___________  
___________  
___________  
___________  
__________  
__________  
__________  
__________  
__________  
__________  
__________  
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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. See Fig. 1.  
Set the right lever (red mark) to the tem-  
perature you want for normal comfort periods.  
HIGH  
LOW TEMPERATURE  
SETTING LEVER  
(BLUE MARK)  
TEMPERATURE  
SETTING  
LEVER  
(
RED MARK)  
50  
60 70  
80  
NOTE: You may bypass the time program by  
setting both the red and blue levers to the  
same temperature setpoint.  
50 60 70 80  
For Cooling (Not Applicable on  
Heating-only Model):  
M8751  
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.  
Fig. 1—Setting high and low temperature  
setting levers.  
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The subbase fan switch controls fan  
operation as follows:  
Setting Subbase Switches  
(
If Applicable)  
ON—Fan operates continuously.  
AUTO—Fan operates with cooling equip-  
ment as controlled by the thermostat or  
with the heating equipment as controlled  
by the plenium fan switch. In electric  
heat, heat pump, and fan coil systems,  
the fan is controlled by the thermostat in  
heating and cooling.  
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 in 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. Stop  
switch lever in detent over the 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  
Power is supplied to the timer by two AAA  
alkaline batteries (included.) Install batteries in  
thermostat as shown. See Fig. 2. One a year,  
or when batteries are dead, replace with two  
new AAA alkaline batteries. We recommend  
Energizer® batteries. The thermostat itself will  
operate without batteries, but will not operate  
as a fuel saver.  
M8585  
Fig. 2—Inserting timer batteries.  
1
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Setting The Timer  
Lift thermostat flip-up cover to find the 24-hour  
program dial, slotted in ten-minute increments.  
Adjust the timer to the current time by carefully  
TIMER  
SETTING  
KNOB  
turning the knob clockwise  
reverse the knob.  
. Do not  
When time is set correctly, the time indicator  
arrow (see Fig. 3) will point to the correct time  
and corresponding daytime (light) or nighttime  
TIME  
INDICATOR  
ARROW  
(
dark) band of the program dial.  
EXAMPLE: For 11 p.m., the time indicator  
arrow will point directly to the dark band on  
the dial. For 11 a.m, the arrow will point to  
the light band on the dial.  
M1856  
Fig. 3—Setting the timer.  
Daylight saving time  
When daylight saving time starts, carefully move the knob clockwise  
one hour. When  
daylight-saving time ends, carefully move the knob clockwise  
knob, or damage to the timer mechanism may occur.  
23 hours. Do not reverse the  
1
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(
comfort period); a blue pin is inserted at  
0:00 p.m. for low temperature (energy saving  
Programming  
1
You can program your thermostat to  
automatically lower and raise the temperature  
one or more times every 24 hours.  
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 recommend at least five hours for  
each energy saving period.  
Refer to energy savings chart on the back  
cover for typical heating and cooling savings  
with your new thermostat.  
To change the pins or add a new energy  
saving period—  
Before setting your program  
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, you must reset  
the pins when the seasons change. You will  
also probably want to change the lever  
positions.  
Lift thermostat flip-up cover to find the  
4-hour program dial. The slots on the program  
2
dial (Fig. 4) are for the program pins that 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 is preprogrammed. A red pin is  
inserted at 6:00 a.m. for high temperature  
1
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2
4-HOUR PROGRAM DIAL  
(
GRAY AREA FOR NIGHT SETTINGS)  
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.  
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 furnace will be off  
until room temperature drops to the energy  
saving setpoint.  
FLIP-UP  
COVER  
PROGRAM  
PINS  
THERMOSTAT  
COVER  
PROGRAM  
PIN SLOT  
You can set both a day and a night program.  
See Fig. 5 for programming examples.  
PROGRAM INDEX WHEEL  
TIME INDICATOR ARROW  
PROGRAM  
PIN STORAGE  
M8748  
Fig. 4—Program components.  
1
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Setting the cooling program (not  
applicable on heating-only model):  
WINTER  
SUMMER  
1
PROGRAM  
TEMPERATURE PIN IN  
PROGRAM  
TEMPERATURE PIN IN  
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 half-hour head  
start gives the air conditioner time to cool  
the house before you wake up or arrive  
home.  
°F  
°C  
CONTROL  
°F  
°C  
CONTROL  
NIGHT  
BEGINS  
ENERGY 10:00 PM  
SAVING ENDS  
PERIOD 6:00 AM  
58  
14  
BLUE  
80  
27  
RED  
68  
58  
20  
14  
20  
RED  
BLUE  
RED  
75  
24  
27  
24  
BLUE  
RED  
DAY  
BEGINS  
ENERGY 7:30 AM  
80  
SAVING  
PERIOD  
ENDS  
68  
75  
BLUE  
4:00 PM  
1
NOT APPLICABLE ON HEATING-ONLY MODEL.  
M8677  
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 air conditioner will be  
off until room temperature rises to the  
energy saving setpoint.  
Fig. 5—Programming examples.  
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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—moving the program  
index wheel or pushing the setting levers  
together.  
PROGRAM  
INDEX  
WHEEL  
Moving the program index wheel will change  
the program just until the next regularly  
scheduled change is due:  
TIME  
INDICATOR  
ARROW  
Lift the thermostat cover.  
Move the program index wheel counter-  
clockwise  
so the time indicator arrow  
points to the desired color on the dial.  
M1857  
1
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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.  
50  
60 70  
80  
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:  
50 60 70 80  
Simply push both levers to the temperature  
you wish for system control. This tempera-  
ture will stay in effect until you change the  
levers back.  
M2500  
1
6
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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 or  
Move system switch to HEAT position.  
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 (where applicable).  
May be out.  
Relight pilot flame per furnace manufacturer  
instructions.  
RH 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.  
(
continued)  
1
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Troubleshooting (continued)  
Problem  
Check  
other problem.  
Action  
No heat. (continued)  
Contact a qualified service technician for  
assistance.  
Energy savings  
temperature program  
program dial for proper day or  
night phase.  
Turn timer ahead 12 hours. Move setting  
knob clockwise  
only.  
12 hours off.  
Rooms do not warm  
up at programmed  
time.  
timer program for heating system. Move red pin one-half hour earlier on the  
May need more time to warm up  
rooms.  
program dial.  
Temperature change  
occurs at the wrong  
time.  
programs pins for correct time  
locations.  
Relocate pins to desired settings.  
Room temperatures  
are not correct.  
positions of thermostat setpoint  
levers.  
Reset to desired temperatures.  
position of subbase system  
switch.  
Move to desired operating position.  
(
continued)  
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Troubleshooting (continued)  
Problem  
Check  
Action  
Heat-on time too  
short.  
anticipator setting. (See Fig. 6.)  
Increase anticipator setting by 0.05 Observe  
heating system operation.  
Heat-on time too  
long.  
anticipator setting. (See Fig. 6.)  
Decrease anticipator setting by 0.05.  
Observe heating system operation.  
No cooling.  
1
system switch. May be in OFF or  
HEAT position.  
Move switch to COOL position.  
fuse or circuit breaker.  
If fuse is blown or breaker tripped, replace or  
reset.  
condensor switch position.  
Located outdoors and may be  
turned off.  
Move to ON position.  
Y, G, RC thermostat connections. Turn off power to cooling system. Check for  
correct terminal hookups. Repair any frayed  
or broken wires. Firmly tighten all terminal  
screws.  
(
continued)  
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Troubleshooting (continued)  
Problem  
Check  
other problem.  
Action  
No cooling.  
continued)  
Contact a qualified service technician for  
assistance.  
(
Timer does not run.  
batteries may not have been  
installed.  
Install as shown on page 10.  
level position of thermostat.  
Replace with two new AAA alkaline batteries  
as shown on page 10.  
Thermostat setting  
and thermometer  
reading disagree.  
area around thermostat for drafts  
or radiant heat.  
Reinstall thermostat wallplate or subbase.  
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.  
calibration of thermometer.  
See instructions on page 22.  
Not applicable on heating-only model.  
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Servicing The Thermostat  
System on-length adjustment  
NOTE: Not applicable on CT1503 Millivolt Heat  
model.  
If the thermostat seems to cycle the heating  
system too fast or too slow, adjust the heating  
system on-length by moving the anticipator  
setting lever one indicator mark at a time (Fig. 6);  
a higher setting will increase heating system on  
length a lower setting will decrease heating  
system on-length. Observe the heating system  
operation after each adjustment.  
ANTICIPATOR  
SCALEPLATE  
ANTICIPATOR  
SETTING LEVER  
M9616  
Fig. 6—Heat anticipator setting.  
The heat anticipator must be correctly set.  
An incorrect setting can result in room tempera-  
ture swings or burn out the anticipator, which  
would void the thermostat warranty.  
IMPORTANT: Most hot water systems require  
a setting of 1.3 times the valve current  
rating.  
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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 adjustment  
The thermometer was accurately calibrated  
at the factory and should only need adjustment  
if it was 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.  
THERMOMETER  
BACKSIDE OF  
SLOT  
FLIP-UP COVER  
Set the thermostat cover on a table near the  
thermometer of known accuracy.  
INSERT AND TURN  
SCREWDRIVER  
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.  
M1810  
Fig. 7—Thermometer adjustment.  
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69-0333—6  
Toll-free Consumer Services  
If you have questions regarding the Timer 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 (for example, hot water, warm air, oil, gas, etc.)  
and number of wires connected to the thermostat.  
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TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA  
Savings for Once-A-Day  
0°F [5°C] decrease  
Savings for Twice-A-Day  
10°F [5°C] decrease*  
Savings for 5°F [3°]  
summer increase  
1
30%  
28%  
26%  
24%  
22%  
2
0%  
8%  
1
1
6%  
4%  
1
1
2%  
0%  
1
8
%
%
%
6
4
2
% Minneapolis  
Edmonton  
Regina  
Calgary  
Halifax  
Vancouver  
Buffalo  
Denver Boston  
Des Moines Chicago  
Cincinnati  
New York  
Louisville  
San Dallas  
Francisco Atlanta  
Los Angeles San Diego  
St. Paul  
Moncton  
North Bay  
Quebec  
Cleveland  
Milwaukee  
Kansas City Philadelphia Portland  
Montreal  
Ottawa  
Winnipeg  
Omaha  
Salt Lake  
City  
Detroit  
Pittsburgh  
Indianapolis  
St. Louis  
Columbus  
Seattle  
Wash., D C  
Toronto  
St. John's  
*Based on 10°F (5°C) decrease—(5°F (3°C) decrease  
gives approximately 55 percent of these savings).  
M2416A  
2
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69-0333—6  
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:  
Honeywell Return Goods Department  
Dock 4 MN10-3860  
In Canada: Honeywell Limited/Honeywell Limitée  
35 Dynamic Drive  
1
885 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 replace the product within the terms stated above. HONEYWELL SHALL NOT  
BE LlABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTlAL 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 DURATlON OF THlS 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 special legal rights, and you may have other rights which vary from state to state.  
If you have any questions concerning this warranty, please write: Honeywell Customer Assistance, MN10-1461, 1885 Douglas Drive  
North, Golden Valley, MN 55422. In Canada, write Honeywell Limited/Honeywell Limitée, Retail Products ON15-02H, 35 Dynamic Drive,  
Scarborough, Ontario M1V 4Z9.  
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Home and Building Control Home and Building Control  
Honeywell Inc. Honeywell Limited—Honeywell Limitée  
985 Douglas Drive No.  
Golden Valley, MN 55422  
Helping You Control Your World  
1
740 Ellesmere Road  
Scarborough, Ontario  
M1P 2V9  
D.F. ©Honeywell Inc. 1994 Printed in U.S.A.  
Rev. 11-96 Form Number 69-0333—6  
www.honeywell.com/yourhome  

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