Weekday/Weekend (5-day/2-day)
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vat)
Thermostat and Mounting Plate
Model
PROGRAMMABLE
THERMOSTAT
BY HONEYWELL
PROGRAMMING AND INSTALLATION
INSTRUCTIONS
Limited One-Year Warranty
Honeywell warrants this
excluding battery, to be free from defects in the workmanship or materials, under normal use and
for a
of one (1) year from the date of purchase by tha consumer. If, at any lime during the warranty period, the product is defective or
malfunctions, Honeywell shall repair or replace it (at
option) within a reasonable period of time.
the product is defective,
(i)
(ii) package it carefully,
ma ion, and mail it, postage prepaid, to the following address
with a bill of
dated
of purchase, to the retailer from which you purchased it, or
Proof of purchase (including date of
and a short description of the
in Canada: Honeywell Limited/Honeywell
Inc.
Product Services ON 15-FFE
74o Road
Scarborough, Ontario Ml P 2V9
Return Goods Department
1050
Lane
Plymouth, MN 55441-4437
This warranty does not cover removal or reinstallation coats. This warranty shall not
if is shown by Honeywell that the defect or
malfunction was caused by damage occurred 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 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
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED
wARRANTIES, INCLUDING THE WARRANTIES OF AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY
consequential damages, so
limitation may not apply to you.
LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow
so the above limitation may not apply to you.
on how long an implied warranty lasts,
This warranty
you have any questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc.,
MN 55440-0524 or call 1-800-468-1502, Monday-Friday, a.m. to p.m., Central time. In Canada, write Retail Products ON1 5-02H,
Honeywell 740
you specific legal rights, and You may have other
vary from state to state.
Box 524, Minneapolis,
Road, Scarborough, Ontario Ml P 2V9.
35
TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA
❑
for
❑
Q
55
savings.)
Thermostat patents pending.
Printed in U.S.A.
7-93
Inc. 1993
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Prepare For Installation
Check Table 1 to make sure this thermostat is compatible with your system. If it is not, return
❑
to retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502.
TABLE 1 -COMPATIBILITY CHART.
Compatible With CT2400
System Type
Pilot
Ignition
Yes
Gas-Fired Boilers
Gas—Millivolt
Oil-Fired Boilers
Yes
Yes
Yes
No
Furnace
Electric Furnace
Electric Air Conditioning
Baseboard Electric (120/240 Line Volt)
No
Heat
Equipment
. . . ----I
with 2-wire Honeywell zone valves. Isolating relay required
stats for zone valves. Not compatible with 2-wire White-Rodgers no. 1361 valves.
thermo-
with
water baseboard systems. Will not work efficiently on steam or
gravity systems.
Remove Old Thermostat
[1 Test to make certain that your heating
❑
Loosen screws holding thermostat to
and cooling systems are working properly. If
either does not work, contact your local
heating/air conditioning dealer. To avoid
compressor damage, do not operate the
cooling system when outdoor temperature is
below 50° F[10° C].
subbase, or wall, and lift away.
Disconnect wires from old thermostat or
subbase. As you disconnect each wire, use
masking tape to label it with the old terminal
designation. If there are only two wires, they
do not need to be labeled. If there is an extra
wire that is not connected to your old thermo-
❑
TURN OFF POWER to system at the
furnace, or at the fuse/circuit breaker panel.
Carefully unpack your new thermostat and
mounting plate; save the package of screws,
instructions and receipt.
stat, you will
not be connecting it to your
new thermostat. Keep the wires from falling
back into the wall by wrapping them around a
pencil as shown.
Remove cover from old thermostat. If it
does not snap off when pulled firmly from the
bottom, check for a screw used to lock on the
cover.
4
or multistage system. The thermostat is
compatible with such systems so return
the product to the place of purchase. If you
would like information about which program-
mable thermostats will work with your system,
call Honeywell Customer Assistance at
1-800-468-1502.
Replacing a Clock Thermostat that has C
or Cl Clock Terminals?
If you are replacing a Honeywell
Thermostat, you may find one
or two wires that go to the C or Cl clock
terminals on the Chronotherm Thermostat
wiring
Do not allow them to touch,
or you may damage your transformer.
Three thermostat wires?
Disconnect the wires and wrap them sepa-
rately, using electrical tape. Do not wrap them
together. Place the wires where they will not
interfere with the operation of the new
thermostat. Record the colors and terminal
designation labels of the remaining wires.
If you have three wires for heating only and
can operate the fan using the fan ON switch,
this thermostat will work with your system.
However, some hot water (zoned) heating
systems have three thermostat wires. The
thermostat will not work without installing an
isolating relay on these systems. For details,
call Honeywell Customer Assistance at 1-800-
468-1502.
Six or more wires?
If there are six or more wires (excluding
clock wires attached to terminals), you
most likely have a variation of a heat pump
5
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Install The Batteries
IMPORTANT: Batteries must be installed for
programming and operation of the thermo-
stat and heating/cooling system.
❑
Purchase two AA alkaline batteries;
alkaline batteries will not last as long, and may
leak, causing damage to thermostat or wall
surface. We recommend Energizer batteries.
•l Make sure the thermostat is set in the OFF
position.
As the batteries are running low, a “bAt Lo”
indicator will flash for one to two months
before batteries run out completely. Replace
the batteries as soon as possible after the
indicator starts flashing. If you do not replace
the batteries sometime during the flashing
“bAt Lo,” the indicator will eventually stop
Use a coin to remove battery door.
❑
Install the fresh batteries as shown,
making sure positive and negative terminals
are oriented correctly.
Replace battery door.
6
flashing. “bAt Lo” will stay on without flashing,
indicating the thermostat and heating/cooling
system have stopped working and the
batteries are almost completely dead.
After the batteries are completely dead, the
“bAt Lo” indicator will disappear, leaving a
completely blank display.
20 to 30 seconds of removing the old ones,
you will not have to reprogram the thermostat.
However, if the display is blank, the batteries
are dead or incorrectly installed, and you will
have to reprogram. See pages 12 and 13 to
reprogram.
Press down on left ends of batteries to
remove. If you insert the new batteries within
IMPORTANT: Although the thermostat has a
low battery indicator, replace the batteries
once a year to prevent the thermostat and
system from shutting down
INSTALL TWO AA ALKALINE
due to lack of battery power.
As a precaution, when leaving home for
longer than a month, change batteries before
you leave to prevent the system from shutting
down due to lack of battery power.
M171
7
Program The Thermostat
is the time period you want the
After the batteries are installed, the thermostat
can be easily programmed in your hand
before it is installed on the wall.
house at a comfortable temperature when
you get up and while you get ready for work
or school. (This will be a higher temperature
during heating season, or a lower tempera-
ture during cooling season.)
“LEAVE” is the time period you can set for
an energy-saving temperature while you are
away at work or school. (This will be a lower
temperature during heating season, or a
higher temperature during cooling season.)
“RETURN” is the time period you want the
house at a comfortable temperature for
activities before bedtime. (Again, higher
heat or lower cool.)
If you would prefer to program the thermostat
after it is installed on the wall, skip to page
and return later to this programming section.
The following personal programming chart
(pages 10 to 11 ) may be helpful for planning
your program schedule of time and tempera-
ture settings for various times of the day.
Four time periods are available during
weekdays — “WAKE,” “LEAVE,” “RE-
TURN,” and “SLEEP.” These periods can
be seen individually on the display as you
press the SET SCHEDULE key.
“SLEEP” is the time period you can set for
an energy-saving temperature while you are
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sleeping. (Again, lower heat or higher cool.
For more comfortable sleeping, some
people choose not to raise the cool tem-
perature during the night.)
require it. For example, a house that is occu-
pied during weekdays would only require
programs for “WAKE and “SLEEP.”
If no program is entered for the weekends, the
thermostat will operate on the weekday
“SLEEP program all weekend.
You will set one schedule for weekdays and
another for weekends, because your require-
ments will probably be different for each.
During weekends, only the “WAKE and
“SLEEP time periods are available.
When pressing the keys, use the ball of your
finger or a soft pencil eraser. Use of sharp
fingernails or pencil points can damage the
keypad.
Fill in the times and temperatures you desire
for weekdays and weekends. If you decide not
to program the thermostat, it will automatically
control heating at 68° F [20° C], and cooling at
78° F [26° C], 24 hours a day. Also, you do not
need to enter a time and temperature program
for all periods if your schedule does not
If you make an error at any time during
programming, just press the RUN PROGRAM
key, and continue again at the step where you
left off.
9
Personal Programming Chart
HEATING PROGRAM
Start Time
Heating Temperature
Weekdays
WAKE
LEAVE
RETURN
SLEEP
Weekends
WAKE
SLEEP
If you decide not to enter weekend programs, SLEEP from the weekday program
will copy to the weekend schedule.
The
cannot
set any higher than 88° F [31° C] or any lower than
45° F
C].
10
COOLING PROGRAM
Cooling
Start Time
Weekdays
WAKE
LEAVE
RETURN
SLEEP
Weekends
WAKE
SLEEP
If you decide not to enter weekend programs, SLEEP from the weekday program will copy to
the weekend schedule.
The temperatures cannot be set any higher than 88° F [310 C] or any lower than 45° F [7°
NOTE: If you decide not to program the thermostat, it will automatically control heating at
68° F [20° C], and cooling at 78° F [26° C], 24 hours a day.
11
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COOLING PROGRAM
Start Time
Weekdays
WAKE
Cooling
RETURN
SLEEP
WAKE
SLEEP
If you decide not to enter weekend programs, SLEEP from the weekday program will copy to
the weekend schedule.
temperatures cannot be set any higher than 88° F [31 0 C] or any lower than 45° F [7°
NOTE: If you decide not to program the thermostat, it will automatically control heating at
68° F [20° C], and cooling at 78° F [26° C], 24 hours a day.
11
—
——-
This guide can be used for programming your new thermostat.
NOTE: Batteries are required for operation and programming. When inserting batteries, set
system switch to OFF. Remove battery door (on thermostat left side) using a coin at the
bottom. Follow instructions on pages 6 and 7.
T i m e
Set Current Time/Day
Ahead
To set time, press and release
once,
until current time shows; to set day,
Back
Time
until current day shows; then press
.
Back
Heating Program
With system switch at HEAT, press and release
appear on display.
once. “WAKE,” Mon-Fri and “SET”
c
1
12
Temp
Time
Warmer
cAhead
1
to program “WAKE” temperature for
to program “WAKE time and
Use
Cooler
Back
Time
Mon-Fri. Repeat sequence for “LEAVE,” “RETURN,” “SLEEP.”
Press until “WAKE,” “SA SU” and appear on display. Use
Ahead
to program
c
1
Back
Temp
—
Warmer
u
to program “WAKE temperature for Sat-Sun. Repeat sequence
“WAKE” time and ,—,
Cooler
for “SLEEP.”
u
Cooling Program
With system switch at COOL, follow the same instructions as for Heating Program.
After programming, adjust fan and system switches as desired. Press and release
start the program.
to
13
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quick guide for operating or making changes follows:
NOTE: System switch must be set to Heat or Cool to perform the following:
Temp
—
u
Temporarily Change Temperature for Current Period
. Temporary indicator will
show on display; it will cancel itself at next scheduled change. To cancel sooner, press
Temp
Hold a Temperature Indefinitely—
,
press
to cancel.
0
14
.
-
-
-
(If using Temporarily Change or Hold,
Check Current Temperature Setting-
pressing this will cancel your change.)
.
Run
repeatedly to see each time and temperature; then Program .
Check Programs—
Cancel a Program-
Time
(
together.
until program to cancel shows; then
Beck
Permanently Change a Program—Repeat steps under Heating Program or Cooling Program
(pages 12 and 13) as applicable.
Return to normal program or start program —
.
u
Customer Assistance
Adjust Fan Operation Switch, As Required
electric heat system, set the switch to “E. The
“E setting will allow the fan to turn on
with the heating or cooling in a system
where the “G” terminal is connected.
The thermostat fan operation switch, labeled
FUEL SWITCH (see illustration on page 17) is
factory-set in the “F position. This is the correct
setting for most systems. If your system is an
Adjust System On-Time, As Required
The system on-time is
for a warm
approximately 360° counterclockwise, or about
one complete turn.
air, gas or oil heating system. If you are installing
it on another type of system, the system on-time
must be adjusted accordingly by setting screws A
and B on the back of the thermostat. Use the
heating system table shown in the illustration,
(page 17) as a guide. The system on-time should
be optimized according to the type of system to
minimize room temperature swings. Setting the
screw “out one turn” means turning the screw
In the unlikely event that you want longer furnace
on-time, readjust screws A and/or B as follows:
First, turn both screws in completely, then adjust
for system type:
● Warm Air Furnace-Set at the Hot Water
setting, (A - out one turn, B - in).
● Electric Furnace-Leave at the Warm Air
Furnace setting (A - in, B - in).
16
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NOTE: This thermostat does not have a setting for steam/gravity air. Cycles would not be long
enough for accurate temperature control.
IMPORTANT: When using a high
THERMOSTAT BACK
efficiency furnace such as a
1
1
-
-
.
.
90 percent or greater Average
Fuel Utilization Efficiency
(AFUE) unit, adjust screw A
OUT ONE TURN and screw
B IN.
1
1
1
1
1
1
1
Y
1
I
FUEL SWITCH
1
-
-
-
-
17
Mount Thermostat Mounting Plate
Position mounting plate on wall. Use a level
to make sure mounting plate is level. Use a
(2)
pencil to mark the two mounting holes.
18
—.
LEVEL
•l Remove mounting plate from wall, and drill
3/1 6 inch holes in wall (if drywall) as marked.
)
(
For firmer material such as plaster or wood,
drill 7/32 inch holes. Gently tap anchors
(provided) into drilled holes until flush with the
wall.
❑
Reposition mounting plate over holes,
pulling wires through wiring opening. Loosely
insert two mounting screws into holes.
❑
Level for appearance only; thermostat will
function properly even when not level. Tighten
mounting screws.
M1714A
19
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Mount The Thermostat
c.
A. ENGAGE TABS AT TOP OF
THERMOSTAT AND MOUNTING PLATE.
B.
PRESS LOWER EDGE
OF CASE TO
1
NOTE: To remove thermostat from wall, first pull out at
bottom of thermostat, removing top last.
Check Thermostat Operation After
Programming And Installing
HEATING
Do not check heating system
Move the system switch to HEAT and
the fan switch to AUTO.
operation by jumpering thermostat
terminals at the primary control such
as the gas valve, zone
oil
burner control. This will damage the
thermostat. Instead, jumper R and W
wires at the thermostat.
Temp
Press key until the setting is about
10° F [6° C] above room tempera-
ture. Heating should start and the fan
should run after a short delay
(immediately if fan operation switch is
set in E position).
Warmer
c
1
Temp
Cooler
Press key until setting is about 10° F
[6° C] below room temperature. The
heating equipment should shut off.
25
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Move the system switch to COOL
and the fan switch to AUTO.
COOLING
To avoid possible compressor
damage, do not operate the
cooling system when outside
temperature is below 50° F
[1 O“ C]. See compressor manu-
facturer instructions for further
information.
Temp
Press key until setting is about 10°
F [6° C] below room temperature.
The cooling equipment and fan
should start.
NOTE: When cooling setting is
changed, thermostat may delay
up to five minutes before
turning on the air conditioner.
This delay protects the com-
pressor.
Temp
Press key until the setting is about
10° F [6° C] above room tempera-
ture. The cooling equipment and
fan should stop.
Warmer
Move the system switch to OFF
with the fan switch still at AUTO.. .
The system and fan should be off.
26
Set The Fan And System Switches
■
First set the fan switch.
FAN AUTO: Normal settingfor most
homes. A fan will turn on
conditioner or
furnace. A two-speed fan will usually
run on high with air conditioner and on
low with furnace.
Exception: When Fan Operation
Switch on back of thermostat is set to
“E” position (see page 16), fan will
operate with furnace only.
FAN ON: The fan runs continuously.
Use for improved air circulation during
special occasions or for more efficient
electronic air cleaning. (In a heat-only
system, fan will run continuously only
when fan relay is connected to the
thermostat.)
Auto On
27
Then set the system switch.
COOL: The thermostat controls your
air conditioning system.
OFF: Both the heating and air
conditioning systems are off.
HEAT: The thermostat controls your
heating system.
28
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Troubleshooting Guide
THEN...
Set the system switch to OFF. Remove batteries.
IF...
Display will not come on.
Insert batteries backward forat least five seconds to
reset thermostat. Replace batteries correctly. Display
should come on.
Make sure batteries are fresh and installed correctly.
Gently clean battery contacts using a soft pencil
eraser. Do not use anything abrasive on clips.
You have reached the temperature setting limit.
The setting range is 45° F to 88°F [7°Cto310 C].
Temperature display will not go lower
than 45° F
C] or higher than 88° F
[31 0 C] during programming.
Check the program times for the period in
question. Be sure that AM and PM indications
are correct. Make sure the current day and time are
correct. Reprogram if necessary.
Temperature change occurs at the
wrong times.
Check that switch on thermostat is set to HEAT.
29
Heating will not come on.
Check the system fuse or circuit breaker and replace
or reset if necessary.
Heating will not come on (continued).
Check for correct wiring and good connections.
Jumper wires R and W. If heat does not come on,
contact your heating dealer.
If display is blank or says “bAt Lo,” install fresh
batteries.
If temperature setting is higher than current tempera-
ture, and SYSTEM ON indicator is lit, contact
Honeywell Customer Assistance at 1-800-468-1502.
Check that switch on thermostat is set to COOL.
Check the system fuse or circuit breaker and replace
or reset if necessary.
Cooling will not come on.
Check for correct wiring and good connections.
Jumper wires
and Y. If cooling does not come on,
contact your cooling dealer.
If display is blank or says “bAt Lo,” install fresh
batteries.
The thermostat has a built-in time delay on cooling.
Allow five to ten minutes after changing the setting
before the air conditioner starts.
30
Make sure outdoor disconnect is engaged (on).
If temperature setting is lower than current tempera-
ture, and SYSTEM ON indicator is lit, move system
switch from COOL to OFF for ten minutes. After ten
minutes, return switch to COOL position. If air
conditioner comes on, compressor may have reached
its high limit temperature protection and shut down. If
air conditioner does not come on after the ten minutes
and the SYSTEM ON indicator is lit, contact Honey-
well Consumer Assistance at 1-800-468-1502.
If 2- or 4-wire installation, verify that R-Rc jumper is
installed.
The house is too warm or too cool.
■
■
Press RUN PROGRAM key to check the current
temperature setting.
f desired, change the temperature setting. See
14.
I
SYSTEM ON indicator is lit, but no
heat is coming from the registers.
time for the furnace to heat up and the fan to
on before checking for heat at the register.
to make sure system on-time is set
according to pages 16 and 17.)
31
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■
Readjust system on-time according to instructions on
The furnace cycles too frequently,
or the system cycle length
is too short or too long.
pages 16 and 17.
■
Check that the wiring hole in the wall behind the
wallplate has been plugged with insulation to
prevent drafts that might adversely affect
thermostat operation.
The thermostat current
setting does not
the
display temperature to within 10.
■Be aware that it is normal for the current setting
and display temperature to differ on occasion.
■During recovery from setback or setup, setting and
display temperatures may differ for up to 30 minutes
after the recovery period.
■
Make sure hole behind thermostat is plugged with
insulation to help prevent drafts from adversely
affecting thermostat operation.
Incorrect room temperature
showing on thermostat display.
■The thermostat is factory-calibrated, and cannot be
adjusted.
32
Toll-free Customer Assistance
For all questions concerning this thermostat, please read and follow the instructions. If
additional assistance is needed, call Honeywell Customer Assistance toll-free at 1-800-468-
1502, Monday-Friday,
a.m. -5:30 p.m. Central time.
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.
NOTICE
This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference
Regulations, CRC c. 1374.
33
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|