Honeywell CM901 User Manual
CM901 - User Guide
1 day Programmable
Room Thermostat
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
42010943-103 R1
© 2005 Honeywell International Inc.
Description
The Honeywell CM901 is a programmable room thermostat designed to
control your heating system efciently, providing comfortable temperatures
when you are at home and energy savings when you are away. The following
instructions explain how to program and use the CM901 to provide the most
home comfort at the least cost.
Features
Ergonomic User Interface features an ‘OK-button’ making the CM901 very
easy to use so you always stay in control.
Dynamic Text Display provides informative ‘on-screen’ feedback and
operational assistance to the user.
Extra Large LCD (Liquid Crystal Display) Screen with Backlight provides
added user friendliness and clearer viewing – even in the dark.
6 independent temperature levels lets you set any 6 temperatures you require
(from 5 to 35°C) so you can enjoy economical comfort throughout the day.
Holiday button saves energy by letting you reduce the temperature for 1 to 99
days while you are away from home, resuming normal operation on your return.
Automatic Summer/Winter Time Change will adjust the clock automatically
for ‘Daylight Saving Time’.
Built-in Memory holds the user program indenitely so that it is never lost
– even if you remove the batteries.
Outside Temperature Sensor (optional accessory) can be tted to the
CM901 to display the temperature outside your home.
Remote Temperature Sensor (optional accessory) can be tted to the CM901
to control to the room temperature in another location, concealing the CM901.
Optimum Start option is an advanced feature which ensures that the optimum
temperature conditions are achieved at the required times.
Contents
GETTING STARTED WITH THE CM901
STEP 1: Installing the Batteries......................................... 3
STEP 2: Setting the Date and Time................................... 4
STEP 3: Running the Built-In Heating Program ................ 4
PROGRAMMING THE CM901
The Built-in Heating Program............................................ 5
Reviewing the Heating Program ....................................... 5
Modifying the Heating Program........................................ 5
Disabling / Enabling Time Periods ................................... 7
OPERATING THE CM901
Choosing the Operating Mode ......................................... 8
AUTO mode ............................................................ 8
MAN mode .............................................................. 8
OFF mode ............................................................... 8
Adjusting the Time............................................................ 8
During Normal Operation ................................................. 8
Temperature Enquiry ............................................... 8
Temperature Override ............................................. 9
Using the Special Functions ............................................. 9
HOLIDAY Function .................................................. 9
FINE TUNING THE CM901
Changing the User Parameters ...................................... 10
Change the Time Format....................................... 11
Reset the Built-in Program..................................... 11
Summer / Winter Time Change ............................. 11
FAQ’s & TROUBLESHOOTING
Frequently Asked Questions........................................... 12
Trouble Shooting Guide .................................................. 15
WHAT IS A PROGRAMMABLE ROOM THERMOSTAT?
An explanation for householders .................................... 16
Controls Layout
Day / Date Display
Time Display
Dynamic Text Display
Heating On Indicator
Battery Low Indicator
Temperature Display
Temperature Change Buttons
Temperature Enquiry Button
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Slider Switch
Green OK Button
Program Buttons
Battery Compartment Lid
Battery Compartment
Holiday Function Button
Time Change Buttons
1..6
AUTOMANOFF
CM901
DATE
PROG
AUTO
MAN
OFF
14
15
1
2
3
5
4
6
8
9
10
7
13
12
11
Manufactured for and on behalf of the Environment and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37,
Switzerland by its Authorised Representative Honeywell International Inc.
3
This section shows you how to setup and run the thermostat in 3 simple steps:
STEP 1: Installing the Batteries
Note: Please follow the instructions in this section only if the thermostat screen is
blank (no symbols or digits are displayed). If the screen displays some information
move on to STEP 2: Setting the Date and Time.
To install the Batteries:
a. Lift up the front cover of the thermostat
to reveal the battery cover and product
controls.
b. Remove the battery cover by pressing
down and sliding out.
c. Insert the 2 x AA LR6 Alkaline Batteries
supplied with the thermostat, ensuring
the correct orientation (see ‘Controls
Layout’ on page 2).
d. After a short pause the thermostat will
display information on the screen and
is now ready for use.
e. Replace the battery cover by sliding
it rmly back into the front of the
thermostat.
GETTING STARTED WITH THE CM901
PLEASE RESPECT YOUR ENVIRONMENT!
Take care to dispose of used batteries carefully.
4
5
STEP 2: Setting the Date and Time
To set the Date and Time:
a. Move the slider switch to the DATE position. ‘SET THE DAY’ will be displayed on
the screen and the day digits will be ashing.
b. Use the
or
buttons to set the correct day. When either of these buttons
are pressed ‘DAY OK?’ will be displayed. Once the correct day is reached, press
the green
button to conrm.
c. Now the month digits will start ashing and ‘SET THE MONTH’ will be displayed.
Change the month and then the year using the
or
buttons, pressing the
green
button to save any changes made. (If an invalid date has been entered
you will be returned to the start of the date setting mode).
d. After setting a valid date, the time digits will begin ashing and ‘SET THE TIME’
will be displayed.
e. Use the
or buttons to set the correct time. Each press of the button will
change the time by one minute and holding the button down will change the time
slowly at rst and get progressively quicker. Once the correct time is set, press
the green
button to conrm then ‘CHANGES SAVED’ will be displayed for a
moment followed by ‘DATE COMPLETE’.
Note: If the slider switch is moved at any time before ‘DATE COMPLETE’ is displayed
the changes to the date and time will NOT be saved.
STEP 3: Running the Built-in Heating Program
The thermostat is now ready for operation. Move the slider switch to the AUTO
position and the built-in heating program will start running. The built-in heating
program has been designed to provide normal comfort requirements, but if you want
to customise the default settings (as shown on the next page) please see the next
section ‘PROGRAMMING THE CM901’.
GETTING STARTED WITH THE CM901
DATE
PROG
AUTO
MAN
OFF
5
PROGRAMMING THE CM901
The Built-in Heating Program
The built-in heating program has 6 temperature level changes that can be set
between 3.00am and 2.50am - allowing you to maintain the evening temperature
after midnight. Each temperature level can be set between 5°C and 35°C, and
adjusted in 0.5°C increments. The factory default program for heating is as follows:
Reviewing the Heating Program
To review or edit the heating program move the slider switch to the PROG position
then use the
or
buttons to navigate between the 6 individual programming
periods.
Modifying the Heating Program
To change the heating program:
a. Set the slider switch to the PROG position, entering programming mode. ‘SET
TIME 1’ will be displayed and the time settings for period
1
will be ashing. The
active period is highlighted by a ashing square symbol around the numbers at
the bottom of the screen.
Period 1 2 3 4 5 6
Time 6:30 8:00 12:00 14:00 18:00 22:30
Temperature 21°C 18°C 21°C 18°C 21°C 16°C
DATE
PROG
AUTO
MAN
OFF
1
6
5
4
3
2
6
7
PROGRAMMING THE CM901
b. To adjust the period start time press the
or
buttons and ‘TIME 1 OK?’ will
be displayed. Holding the button down will change the time quickly.
Note: If you are pressing the
or
buttons and the display ashes the next
change period, it means the next change will be pushed forward if you continue
to press
or
buttons).
c. Press the green
button to conrm the setting. ‘CHANGES SAVED’ is displayed
for 1.5 seconds then ‘SET TEMP 1’ will be shown.
Note: If the original time setting did not require adjustment press the green
button to move on to step ‘d.’.
d. The temperature setting for period
1
will now be ashing. To adjust this press the
or
buttons and ‘TEMP 1 OK?’ will be displayed.
e. Press the green
button to conrm the setting. ‘CHANGES SAVED’ will be
displayed for a moment followed by ‘SET TIME 2’.
f. The next time and temperature period will now be active. Adjust this by repeating
steps b - e above until all 6 periods are set or move the slider switch to the AUTO
position to run the program as set, at any time.
g. After setting period
6
‘CHANGES SAVED’ will be displayed as before.
i. To exit the programming mode move the slider switch to the desired operating
mode - AUTO, MAN or OFF. Note: To run the adjusted program select the AUTO
mode.
Note: If the unit is left in programming mode for more than 10 minutes without
the slider being moved or any buttons pressed, ‘MOVE THE SLIDER’ will be
displayed. Press a button to nish programming the thermostat or move the
slider to select the desired operating mode.
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