User manual HONEYWELL CM901

[. . . ] 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 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. [. . . ] To adjust this press the or buttons and `TEMP 1 OK?' will be displayed. button to confirm the setting. Press the green displayed for a moment followed by `SET TIME 2'. 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 finish programming the thermostat or move the slider to select the desired operating mode. 6 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 buttons to navigate, ensuring the correct and position, then using the period is highlighted with the flashing square symbol. Press and hold the button for at least 2 seconds and the display will indicate the period has been removed from the program. To enable time periods: Navigate to the disabled period by moving the slider switch to the PROG buttons. Once selected `DISABLED' will be and position, then using the displayed. Press and hold the button for at least 2 seconds and `ENABLED' will be displayed for a moment before returning to normal programming mode. 7 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 temperature comfort whilst maximising your energy savings. · MAN (manual) mode Manual mode sets the thermostat to act as a simple thermostat with a fixed setpoint throughout the day. The setpoint can be adjusted from 5°C to 35°C or buttons. The thermostat will continue to maintain this by using the temperature until another operating mode or temperature is selected. · OFF mode Off mode sets the thermostat to control to a minimum temperature setting of 5°C (default) that acts as a frost protection measure for your home. This value can be adjusted by calling your installer. Adjusting the Time or buttons to adjust To adjust only the time during normal operation use the button again to confirm any changes. the time and press the green During Normal Operation · Temperature Enquiry In AUTO and MAN operating modes the thermostat will display the current room temperature, which is indicated by the text `ROOM TEMP' displayed on the screen. To review the programmed `target' temperature (the temperature which the thermostat is trying to maintain) press the button. [. . . ] Call installer to check electrical connection between the CM901and the boiler. Call Installer Call Installer Remove and re-insert the batteries in the CM901. If the symbol does not clear itself in a few minutes call the installer CM901 not connected to boiler properly CM901 not set correctly for your system CM901 not set correctly for your system Fault in CM901 Heating switches ON or OFF too slowly or quickly Temperature swings between too hot and too cold. CM901 shows a flashing symbol on the LCD screen 15 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. [. . . ]