Honeywell CT1500 User manual

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

269-0333—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.

369-0333—6
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

469-0333—6
Features of Your Thermostat
1FLIP-UP COVER. Lift up cover to set timer
for energy savings and normal tempera-
ture periods .
2THERMOSTAT COVER. Lift up cover and
remove to adjust heat anticipator or install
batteries.
3THERMOMETER. Provides accurate room
temperature reading.
4TIMER. Provides 24-hour slotted dial to
hold the programming pins.
5TIMER SETTING KNOB. Turn clockwise
to match the correct a.m. or p.m. time to
the time indicator.
6TIME INDICATOR. Arrowhead indicates
time for 24-hour dial.
7PROGRAM 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.
2
1
3
M8750

569-0333—6
8TEMPERATURE SETTING LEVERS.
Left (blue mark) controls the low tempera-
ture; right (red mark) controls the high
temperature.
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
ten minute intervals for program pin
insertion.
11 HEAT ANTICIPATOR SCALE PLATE.
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).
Provides automatic temperature control by
switching the heating or cooling system on
and off.
54
8
13
14
910 7612
11 M8749
14 AAA ALKALINE BATTERIES (2). Included
to provide power to the timer.

669-0333—6
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.
M2421
15
AUTO OFF COOL HEATON
FAN
B
O
W
Y
R
G
M2411
16

769-0333—6
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? ___________ __________

869-0333—6
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.
NOTE: You may bypass 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 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.
50 60 70 80
50 60 70 80
HIGH
TEMPERATURE
SETTING
LEVER
(RED MARK)
LOW TEMPERATURE
SETTING LEVER
(BLUE MARK)
M8751
Fig. 1—Setting high and low temperature
setting levers.

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The subbase fan switch controls fan
operation as follows:
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.
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.
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 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.

10 69-0333—6
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.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
M8585
Fig. 2—Inserting timer batteries.