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Description
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.
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 informati
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Controls Layout Contents GETTING STARTED WITH THE CM901 1 2 3 4 5 6 STEP 1: Installing the Batteries......................................... 3 7 STEP 2: Setting the Date and Time................................... 4 STEP 3: Running the Built-In Heating Program ................ 4 8 PROGRAMMING THE CM901 The Built-in Heating Program............................................ 5 15 Reviewing the Heating Program ....................................... 5 Modifying the Heating Program................
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GETTING STARTED WITH THE CM901 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 ba
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GETTING STARTED WITH THE CM901 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 flashing. D A TE PR OG A UT O MAN OFF 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 confirm. c. Now the month digits will start flashing and ‘SET THE M
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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: 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 Reviewing the Heating Program
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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 flashes 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 confirm the setting. ‘CHANGES SAVED’ is displayed for 1.5 seconds then ‘SET TEMP 1’ will be shown. Note: If t
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PROGRAMMING THE CM901 Disabling / Enabling Time Periods The thermostat has 6 periods that can be programmed, but you may not need all of these switch points for your heating requirements. Therefore, any period from 2 to 6 can be disabled or enabled as follows: To disable time periods: Go to the desired period ( 2 to 6 ) by moving the slider switch to the PROG position, then using the and buttons to navigate, ensuring the correct period is highlighted with the flashing square symbol. Pres
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OPERATING THE CM901 Choosing the Operating Mode The thermostat can operate in three different modes: Automatic, Manual or Off. To set the operating mode move the slider switch to the desired position. The screen indicates which mode is currently active by displaying AUTO, MAN or OFF. • AUTO (automatic) mode Automatic mode sets the thermostat to follow the temperature program (default or personalised). Operating the thermostat in this mode is the best way to maintain a high level of temperat
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OPERATING THE CM901 • Temperature Override During normal operation (AUTO mode) the programmed temperature can be adjusted manually by pressing the or buttons. The ‘target‘ temperature will be displayed and flash for 5 seconds – during this time the or buttons can be used to modify the set value. Note: This temperature override is cancelled at the next programmed temperature change. Using the Special Functions • HOLIDAY Function The holiday function allows you to set a constant tempe
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FINE TUNING THE CM901 Changing the User Parameters The user mode allows you to modify some basic settings of the thermostat to meet your personal preferences. You can change the time display format (24hr or AM/PM), reset the heating program to the built-in settings and disable or enable the summer/ winter time change feature. To change any of these user’s parameters: a. Move the slider switch to the OFF position, then press and hold the button for approximately 5 seconds. button for approxim
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FINE TUNING THE CM901 c. Now choose which one of the following parameters you would like to change: i) Change the time format ‘CLOCK SELECT’ should be displayed on the screen - press the or buttons to select the preferred time format (12=AM/PM format, 24=24hr format) and the display will flash, indicating a change has been made. To confirm this change press the green button. ii) Reset the built-in program to the factory default Press the time button once. The display will show ‘RESE
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FAQ’s & TROUBLESHOOTING How do I change the batteries on the CM901 when they run out? The thermostat constantly monitors the battery power level, which typically last for about 2 years before needing replaced. When the power is running low a flashing symbol will be displayed on the screen. To change the batteries follow the steps in the above section (‘STEP 1: Installing the Batteries’ on page 3), replacing the used batteries with new ones in step c. Note: While changing the batteries your p
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FAQ’s & TROUBLESHOOTING Can I use my CM901 to control my air-conditioning system? Yes, if your system has been set up correctly you can use your thermostat to control the cooling. To switch the thermostat between heating and cooling modes press the or buttons together for 5 seconds in any of the product operating modes (AUTO, MAN or OFF). The text ‘COOLING’ will be displayed for a moment on the screen to indicate the cooling operation is now active. The factory default program for coolin
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FAQ’s & TROUBLESHOOTING What other accessories can I buy that work with the CM901? 1. Outside Temperature Sensor Accessory The Outside Temperature Sensor accessory can be fitted to your thermostat to display the outside temperature. By pressing the button twice, the thermostat displays the external temperature. 2. Remote Temperature Sensor Accessory The Remote Temperature Sensor accessory can be fitted to your thermostat to control the temperature of another room where it is inconvenient t
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14 15 Troubleshooting Guide Symptom Possible Cause Remedy CM901 has a blank LCD Batteries not installed Check to see if there are batteries in the battery screen compartment and the paper tab has been removed Incorrect battery orientation Check that the batteries have been installed in the correctorientation Exhausted batteries Replace with new batteries CM901 shows a flashing Batteries are exhausted and Replace with new batteries symbol on the LCD screen need replacing The CM901’s LCD scree
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WHAT IS A PROGRAMMABLE ROOM THERMOSTAT? ...an explanation for householders A programmable room thermostat is both a programmer and a room thermostat. A programmer allows you to set ‘On’ and ‘Off’ time periods to suit your own lifestyle. A room thermostat works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached. So, a programmable room thermostat lets you choose
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WHAT IS A PROGRAMMABLE ROOM THERMOSTAT? The time on the programmer must be correct. Some types have to be adjusted in spring and autumn at the changes between Greenwich Mean Time and British Summer Time. You may be able to temporarily adjust the heating programme, for example, ‘Override’, ‘Advance’ or ‘Boost’. These are explained in the manufacturer’s instructions. Programmable room thermostats need a free flow of air to sense the temperature, so they must not be covered by curtains or bl
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42010943-103 R1 18
