Honeywell CM901 manual Setting the Date and Time, Running the Built-in Heating Program

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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.

DATE

PROG

AUTO

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 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 flashing 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 first and get progressively quicker. Once the correct time is set, press the green button to confirm 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’.

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Contents CM901 User Guide Controls Layout Contents Installing the Batteries To install the BatteriesRunning the Built-in Heating Program Setting the Date and TimeTo set the Date and Time Reviewing the Heating Program Built-in Heating ProgramModifying the Heating Program To press or buttons To enable time periods To disable time periodsDisabling / Enabling Time Periods Adjusting the Time Choosing the Operating ModeDuring Normal Operation Using the Special Functions Temperature OverrideHoliday Function To set the Holiday functionChanging the User Parameters To change any of these user’s parametersIii Enable or disable summer/winter time change Ii Reset the built-in program to the factory defaultChange the time format How do I set one temperature for the whole day? What is Optimum Start?Can I use my CM901 to control my air-conditioning system? Remote Temperature Sensor Accessory Troubleshooting Guide Symptom Possible Cause RemedyAn explanation for householders What is a Programmable Room THERMOSTAT? 42010943-103 R1

CM901 specifications

The Honeywell CM901 is a highly efficient, programmable room thermostat designed for residential heating systems. This versatile device caters to the needs of homeowners by combining user-friendly features with advanced technology to ensure optimal climate control in living spaces.

One of the standout features of the CM901 is its ability to offer seven-day programming. Users can set different heating schedules for each day of the week, allowing for flexibility according to their lifestyle. This functionality is particularly beneficial for families with varying routines, enabling energy savings during times when the home is unoccupied. Users can program the thermostat to reduce heating in the mornings when they are away and ramp up the temperature just before they return home.

The CM901 supports a wide range of heating systems, including gas, oil, and electric boilers, as well as underfloor heating systems. This compatibility makes it suitable for a variety of homes and heating setups, ensuring that it can meet the unique needs of different households. Furthermore, its easy installation process allows homeowners or contractors to set it up with minimal hassle.

Equipped with an intuitive interface, the CM901 features a clear LCD display that shows the current room temperature and set point at a glance. The backlit screen enhances usability, enabling users to read the display in low-light conditions. The device also allows for manual override, making it convenient for users to adjust settings on-the-fly without interfering with their programmed schedule.

Energy efficiency is a prime focus of the CM901, as it helps reduce heating costs while maintaining comfort. Its precise temperature control and programming capabilities ensure that heating is only used when necessary, leading to reduced energy consumption. This not only benefits the environment but also helps homeowners save money on their energy bills.

In terms of build quality, the Honeywell CM901 boasts a sleek and modern design that fits seamlessly into contemporary home decor. Its durable construction ensures longevity, offering reliable service for years to come.

Overall, the Honeywell CM901 stands out as a practical solution for homeowners seeking a blend of comfort, efficiency, and ease of use in their heating systems. With its programmable features, adaptability, and user-friendly interface, the CM901 is an excellent choice for those looking to enhance their indoor climate control experience.
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