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Ratings: 10.5A maximum at 208 to

240 Vac, 50/60 Hz, 2500W. (To
determine baseboard wattage,
check the nameplate or
measure the length of the
baseboards the thermostat will
control. Generally, if the length of
the baseboards is more than ten
feet per thermostat, the wattage
is probably over 2500W. You
need to call an electrician.)

Not for use with central heating

systems or fan-forced heaters.

Do-it-yourself model.

YOUR HONEYWELL THERMOSTAT

Your new Honeywell CT1700 adjusts room temperature to

maximize comfort and energy savings by sensing light and
motion. It provides 15% to 23% energy savings compared to
nonprogrammable electric heating thermostats. The CT1700
replaces any two-wire, spst, line voltage thermostat used for
controlling electric baseboard heat.

CT1700A 

ultrastat™ MOTION-ACTIVATED

LINE VOLTAGE THERMOSTAT

Programmable control for baseboard heaters.

Temperature Setting Range: 44 

°

F to 80 

°

F [7 

°

C to 27 

°

C].

Motion Detection: Infrared detection up to 23 ft [7m]; 60 degrees vertical

and 110 degrees horizontal viewing angle.

Light Detection: Photoresistive element with adjustable light level

sensitivity.

Switching: Triac based (spst).

CONTENT

SECTION

PREPARATION

1

THERMOSTAT FEATURES

2

REMOVE OLD THERMOSTAT

3

WIRE AND MOUNT NEW THERMOSTAT

4

CHECK fOUT THERMOSTAT

5

PROGRAMMING

6

Limited One-Year Warranty

Honeywell warrant this product to be free from defects in the workmanship or materials, under nor-
mal 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 Inc.

in Canada:

Honeywell Limited/Honeywell Limitée

Return Goods Department

Product Services ON15-FFE

1050 Berkshire Lane

740 Ellesmere Road

Plymouth, MN 55441-4437

Scarborough, Ontario M1P 2V9

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 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 consequen-
tial damages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PROD-
UCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MER-
CHANTABILITY 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 Inc., P.O. Box 524, Minneapolis, MN 55440-0524 or call 1-800-468-1502, Monday-Friday,
7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON15-02H, Honeywell Limited/
Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P 2V9.

1

PREPARATION

Proper installation of your
Honeywell thermostat will

occur if you follow instructions
step-by-step. It is recom-
mended that as you read,
understand and complete each
step, you check 

 it off with

pencil or pen.

Check thermostat suitabil-
ity for your home’s system

by reviewing the ratings listed on
the front of these instructions.

Make certain that your
heating system is

working, especially if it has
been inoperative for a length of
time. If the system does
not work, contact your local elec-
trician for assistance.

Carefully unpack your new
thermostat.

Save instructions, receipt
and proof-of-purchase.

J. H. • 12-93 • Printed in Canada • ©Honeywell Inc. 1993 • Form Number 69-0820

2

THERMOSTAT FEATURES

Loosen the screws
holding the thermostat

base to the electrical box and
lift away.

Disconnect wires from
the old thermostat. If

the old thermostat was not
mounted to a vertical outlet
box, install a box now.

Check the old wire
insulation for cracks,

nicks or fraying, and apply UL
Listed/CSA Certified electrical
tape where necessary, for
adequate insulation.

Retain the old thermo-
stat for reference later

and until your new thermostat
is functioning smoothly.

M9072

COMFORT

ECONO

SET

SEL

MODE SYMBOLS

LCD DISPLAY

TEMPERATURE SETTING

SELECT KEY FOR 
CHANGING FROM 
MODE TO MODE

LIGHT SENSOR WINDOW

SET KEY FOR CHANGING
THE SETTINGS IN 
MODES OR READING 
ROOM TEMPERATURE

MODE INDICATOR 
SHOWS WHICH MODE 
IS OPERATING 

!

CAUTION

To prevent electrical shock or
equipment damage, disconnect
power supply before beginning
installation.

Begin by turning off power
to the heating system.

Remove cover of old
thermostat—cover

normally snaps off when pulled
firmly from the bottom. If it
resists, check for a screw that
locks on the cover.

3

REMOVE

OLD

THERMOSTAT

4

WIRE AND

MOUNT NEW

THERMOSTAT

Remove the CT1700A
cover by grasping the top

or bottom edges and pulling
outward away from the thermo-
stat base.

Connect wires to the
thermostat, as shown in

the wiring diagram, using
approved solderless wire
connectors.

NOTE: Special service CO/ALR

wire connectors must be
used when connecting with
aluminum conductors;
otherwise, a fire hazard can
result.

Prebend and push the
wires into the outlet box.

Mount the thermostat on the
outlet box using the screws
provided.

CHECK OUT

THERMOSTAT

Turn on the power to the
heating system. The

thermostat will display “SC” for
15 seconds, showing the
system is operating properly. If
an “E” flashes continuously, the
thermostat is defective. Return
the thermostat for a replace-
ment unit.

Occupied-dark” indicator

will flash for two minutes

while the thermostat program is
being initialized. Next, the
actual operating program will
be displayed. (It takes three
minutes from turning on the
power for the programmed
temperature to be displayed.)

5

6

PROGRAMMING

Tap the SEL key to move between modes. The
display changes in the following order: occupied-
light, unoccupied-light, unoccupied-dark, occu-
pied-dark, L, F or C.

NOTE: To lessen temperature changes when an

occupant leaves an area, the CT1700 will not
change from an occupied to unoccupied
setting for 60 minutes (light setting) or for three
hours (dark setting). If you notice your pet
activating the program, cover up the lower half
of the sensor window or program temperature
changes for only light and not occupancy.

Sample Programs

KITCHEN

LIVING OR FAMILY ROOM

BEDROOM

Mode

Remarks

Temp.

Setting

Remarks

Temp.

Setting

Remarks

Temp.

Setting

Occupied-light

Set for a comfortable
temperature for eating or
cooking.

68° F

[20° C]

Set for a comfortable
temperature for reading or
watching TV.

68° F

[20° C]

Set for a comfortable
temperature for getting up
in the morning.

68° F

[20° C]

Unoccupied-light

Set the temperature desired
when you are out of the
room in the daytime.

60° F

[15° C]

Set the temperature desired
when you are out of the
room in the daytime.

60° F

[15° C]

Set the temperature desired
when you are out of the
room in the daytime.

60° F

[15° C]

Unoccupied-dark

Program for when no one
is using the kitchen.

60° F

[15° C]

Program for when no one
is using the room.

60° F

[15° C]

Program for when no one
is using the bedroom.

60° F

[15° C]

Occupied-dark

This mode is primarily for
sleeping rooms. Set
temperature desired when
no one is using the kitchen.

60° F

[15° C]

This mode is primarily for
sleeping rooms. Set
temperature desired when
no one is using the room.

60° F

[15° C]

Set desired temperature for
sleeping.

62° F

[16° C]

LIGHT LEVEL

Use the least sensitive
setting so the thermostat
does not sense the light
from an open refrigerator
door at night.

L3

Use the most sensitive
setting so the thermostat
will sense the tv or small
reading light.

L1

Use the average setting.

L2

Fahrenheit or Celsius Temperature
Display

Select Fahrenheit or Celsius by
tapping the SEL key until F or C

appear in the LCD display. Tap the
SET key to select the setting.

Program Temperature Setting
NOTE: If programming in Fahrenheit,

only even numbered temperatures
(i.e., 66, 68, 70) can be selected.
The temperature setting range is
40

°

 to 86

°

 F [5

°

 to 30

°

 C].

Tap the SEL key until the
indicator on the LCD points to

the desired condition (i.e., occupied-
dark). Press the SET key to select the
desired temperature. Repeat for each
condition.

Program Light Level
Consider the ambient outdoor and
indoor lighting over a 24 hour period
when setting the light level. The three
light level settings are: L1—the most
sensitive so it is used when you want
the thermosat to respond to a low light
level, like the TV or reading light; L2—
average setting so it is used for most
rooms; L3—the least sensitive setting
so it is used in well-lit areas.

Tap the SEL key until the LCD
displays L1, L2 or L3. Tap the

SET key to change the light
setting.

Review Program

Tap the SEL key to scroll
between settings. If you want to

change any setting, tap the SET key
until the display shows the desired
setting.

Reading Current Temperature

Tap the SET key. The room
temperature and four indicators

will be displayed for about ten sec-
onds. The display range is 40

°

 to 86

°

F

[5

°

 to 30

°

C]. When the room tempera-

ture is warmer than 86

°

 F [30

°

 C], the

two upper indicators will be displayed.
When the room temperature is colder
than 40

°

 F [5

°

 C], the two lower

indicators will be displayed.

Loss of Power
The CT1700 maintains the program
during loss of power without batteries.
The display will go blank and when
power is restored, the display will go
through the steps in the CHECK OUT
THERMOSTAT section.

L1

T1

SOLDERLESS
CONNECTORS

L1
(HOT)

L2

3

2

ELECTRIC
HEATER

2

POWER SUPPLY.  PROVIDE DISCONNECT 
MEANS AND OVERLOAD PROTECTION 
AS REQUIRED.

SPECIAL SERVICE CO/ALR SOLDERLESS 
CONNECTORS MUST BE USED WHEN 
CONNECTING WITH ALUMINUM 
CONDUCTORS;  OTHERWISE, A FIRE 
HAZARD CAN RESULT.

TRIAC CONDUCTS EVERY 15 SECONDS 
UNLESS ROOM TEMPERATURE IS ABOVE 
SETPOINT.

3

1

1

M3643A

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