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 temperature (default = 10°C) for a specified number of days (from 1 - 99 days). This lets you save energy and related costs when you are away from home, but resumes normal operation on the day of your return.

To set the Holiday function:

a.Move the slider switch to the AUTO or MAN position.

b.Press the button to display the holiday days counter and temperature setting, along with the holiday indicator .

c.The day after the current day will be selected and ‘RETURN DATE OK?’ will be

displayed. Press the ortime buttons to set the holiday time (1 – 99 days). Note: (The day and date will update according to the number of days selected).

d.Press the green button to confirm the setting.

e.‘CHANGES SAVED’ will be displayed for a moment followed by ‘TEMP OK?’.

Press the or buttons to set the holiday temperature (5°C - 35°C)

f.Press the green button to confirm the setting. ‘HOLIDAY MODE’ will now be displayed on the screen until the return date is reached or the holiday mode is cancelled.

The thermostat will now control to the new temperature for the set number of days that your home is vacant. At midnight the holiday counter will be reduced by one until the selected number of days have passed. The thermostat will then return to normal operation as set by the slider switch position (AUTO or MAN position). To cancel the HOLIDAY setting or to exit the function at any time press the button a second time or move the slider switch to a different position.

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Honeywell CM901 manual Using the Special Functions, Temperature Override, Holiday Function, To set the Holiday function
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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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