Honeywell CM901 Manual

Honeywell CM901 Manual

The Honeywell CM901 is a programmable room thermostat designed to control your heating system efficiently, 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.

Honeywell CM901 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 indefinitely so that it is never lost – even if you remove the batteries.
  • Outside Temperature Sensor (optional accessory) can be fitted to the CM901 to display the temperature outside your home.
  • Remote Temperature Sensor (optional accessory) can be fitted 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.

Honeywell CM901 Controls Layout

Honeywell CM901 Controls Layout

  1. Day / Date Display
  2. Time Display
  3. Dynamic Text Display
  4. Heating On Indicator
  5. Battery Low Indicator
  6. Temperature Display
  7. Temperature Change Buttons
  8. Temperature Enquiry Button
  9. Slider Switch
  10. Green OK Button
  11. Program Buttons
  12. Battery Compartment Lid
  13. Battery Compartment
  14. Holiday Function Button
  15. Time Change Buttons

Honeywell CM901 Table of 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

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Honeywell CM901 Manual