Instruction/ maintenance manual of the product CM901 Honeywell
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CM901 - User Guide 1 day Pr ogrammable Room Thermostat Honeywell Control Systems Ltd. Arlington Business Park, Bracknell Berkshire RG12 1EB T echnical Help Desk: 08457 678999 www .
Contents GETTING ST ARTED 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.
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 infor mation move on to STEP 2: Setting the Date and Time.
4 5 STEP 2: Setting the Date and Time T o set the Date and Time: a. Move the slider switch to the D A TE position. ‘SET THE DA Y’ 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 ‘DA Y OK?’ will be displayed.
4 5 PROGR AMMING THE CM90 1 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.
6 7 PROGR AMMING THE CM90 1 b. T o adjust the period start time pr ess the or buttons and ‘TIME 1 OK?’ will be displayed. Holding the button down will change the time quickly .
6 7 PROGR AMMING THE CM90 1 Disabling / Enabling Time P eriods The thermostat has 6 periods that can be programmed, but you may not need all of these switch points for your heating requirements.
8 9 OPERA TING THE CM90 1 Choosing the Operating Mode The ther mostat can operate in three different modes: Automatic, Manual or Off. T o set the operating mode move the slider switch to the desired position. The screen indicates which mode is currently active by displaying A UTO , MAN or OFF .
8 9 OPERA TING THE CM90 1 • T emperature Override During normal operation ( AUT O mode) the programmed temperature can be adjusted manually by pressing the or buttons. The ‘target‘ temperature will be displayed and ash for 5 seconds – during this time the or buttons can be used to modify the set value.
1 0 1 1 FINE TUNING THE CM90 1 Changing the User P arameters The user mode allows you to modify some basic settings of the ther mostat to meet your personal preferences. Y ou can change the time display format (24hr or AM/PM), reset the heating pr ogram to the built-in settings and disable or enable the summer/ winter time change feature.
1 0 1 1 FINE TUNING THE CM90 1 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 ash, indicating a change has been made.
1 2 1 3 How do I change the batteries on the CM901 when they run out? The ther mostat constantly monitors the batter y power level, which typically last for about 2 years before needing replaced. When the power is running low a ashing symbol will be displayed on the screen.
1 2 1 3 F A Q’ s & TROUBLESHOO TING Can I use my CM901 to contr ol my air -conditioning system? Y es, if your system has been set up correctly you can use your thermostat to contr ol the cooling.
1 4 1 5 F A Q’ s & TROUBLESHOO TING What other accessories can I buy that w ork with the CM901? 1. Outside T emperature Sensor Accessory The Outside T emperature Sensor accessory can be tted to your ther mostat to display the outside temperature.
1 4 1 5 T roub leshooting Guide Symptom CM901 has a blank LCD screen CM901 shows a ashing symbol on the LCD screen The CM901’ s LCD screen works but the heating does not switch on Heating switches ON or OFF too slowly or quickly T emperature swings between too hot and too cold.
1 6 1 7 ...an explanation f or householders A programmable room ther mostat is both a programmer and a room thermostat. A programmer allows you to set ‘On’ and ‘Off’ time periods to suit your own lifestyle.
1 6 1 7 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. Y ou may be able to temporarily adjust the heating programme, for example, ‘Override’, ‘Advance’ or ‘Boost’.
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An important point after buying a device Honeywell CM901 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell CM901 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell CM901 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell CM901 you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell CM901 will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell CM901, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell CM901.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell CM901. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell CM901 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
