Honeywell CM727 User Manual
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Summary of Contents for Honeywell CM727
- Page 1 This is a legacy product document supported by Resideo. It is no longer manufactured CM721 ........2-6 CM727 ........7-11 USER GUIDE...
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Page 2: Controls Layout
CM721 - USER GUIDE Description Features The Honeywell CM721 is a • Ergonomic user interface featuring an ‘OK-button’. programmable room thermostat • Large LCD (Liquid Crystal Display) Screen. designed to control your heating • 4 independent temperature levels (from 5°C to 35°C). system efficiently, providing comfortable temperatures when • Automatic Summer/Winter Time Change. you are at home and energy • Optimum Start to achieve the right temperature at the savings when you are away. The... -
Page 3: Step 1: Installing The Batteries
SETTING-UP THE CM721 ‘Getting Started’ 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). -
Page 4: The Built-In Heating Program
‘Efficient Daily Use’ PROGRAMMING THE CM721 The Built-in Heating Program The built-in heating program has 4 temperature level changes that can be set between 3.00am and 2.50am the following day - 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 6:30 8:00 18:00 22:30 Time Temperature 21°C 18°C 21°C 16°C Reviewing the Heating Program To review or edit the heating program use the PROGRAM or buttons to navigate between the 4 individual programming periods. Modifying the Heating Program To change the heating program: a. Press either of the PROGRAM or buttons to... -
Page 5: Choosing The Operating Mode
OPERATING THE CM721 ‘Using the Features’ Choosing the Operating Mode The thermostat can operate in three different modes: Automatic, Manual or Off. To set the operating mode press either of the AUTO, MAN or OFF buttons. The screen indicates which mode is currently active by displaying AUTO, MAN or OFF. • AUTO (automatic) mode sets the thermostat to follow the built-in 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 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 by using the or buttons. - Page 6 ‘Using the Features’ OPERATING THE CM721 • Automatic Summer/Winter Time Change The CM721 has a built-in Automatic Summer/Winter Time Change feature that will automatically adjust the clock forward or backward by one hour for ‘Daylight Saving Time’. This is carried out on the last Sunday of March and October each year.
- Page 7 TROUBLESHOOTING THE CM721 Symptom Remedy Blank Display (Power Loss). Check batteries are installed by removing the battery cover. Check batteries have been installed in the correct orientation. Replace the batteries. Display shows flashing The batteries in the thermostat are low on power symbol. - Replace the batteries. Display shows symbol. A fault has occurred in your heating system. Remove and re-insert the batteries. If the symbol does not clear after a few minutes contact your installer. Display shows the word 'SERVICE' Your installer has set a scheduled maintenance alert period on your CM721 as a recommendation that your heating system should receive a routine inspection.
- Page 8 CM727 - USER GUIDE Description Features The Honeywell CM727 is a • Ergonomic user interface featuring an ‘OK-button’. programmable room thermostat • Large LCD (Liquid Crystal Display) Screen. designed to control your heating • 7-day heating program to match your lifestyle, whilst system efficiently, providing maximising energy savings. comfortable temperatures when • 4 independent temperature levels per day (from 5°C to 35°C). you are at home and energy • Holiday button saves energy by letting you reduce the...
- Page 9 SETTING-UP THE CM727 ‘Getting Started’ 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).
- Page 10 ‘Efficient Daily Use’ PROGRAMMING THE CM727 The Built-in Heating Program The built-in heating program has 4 temperature level changes per day that can be set between 3.00am and 2.50am the following day - 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.
- Page 11 PROGRAMMING THE CM727 ‘Efficient Daily Use’ f. i) Press the COPY DAY button to copy Monday’s program into Tuesday. The display will go blank apart from the ‘non flashing’ day indicator, which indicates the day copied and the ‘flashing’ target day to copy the program to. To accept this day press the green button. To select a different target day press the DATE/DAY button until the ‘flashing’ day indicator is under the required day, then accept it by pressing the green button. Note: Once the target day is confirmed it becomes the day that is copied if the COPY DAY button is pressed again.
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Page 12: Using The Special Functions
‘Using the Features’ OPERATING THE CM727 During Normal Operation • Temperature Enquiry In AUTO, MAN and OFF operating modes the thermostat will display the current room temperature. To review the programmed ‘target’ temperature (the temperature which the thermostat is trying to maintain) press the button. This ‘target’ temperature value will be displayed flashing for 5 seconds before returning to the current room temperature value. - Page 13 • Automatic Summer/Winter Time Change The CM727 has a built-in Automatic Summer/Winter Time Change feature that will automatically adjust the clock forward or backward by one hour for ‘Daylight Saving Time’. This is carried out on the last Sunday of March and October each year.
- Page 14 This product has been designed for applications as described within this document. For use outside of the scope as described herein, refer to Honeywell for guidance. Honeywell cannot be held responsible for misapplication of the product(s) described within this document.
- Page 15 Display shows the word 'SERVICE' Your installer has set a scheduled maintenance alert period on your CM727 as a recommendation that your heating system should receive a routine inspection. Call your installer to arrange a maintenance visit. Note: The CM727 and heating system will continue to operate as normal.
- Page 16 Programmable room thermostats need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the thermostat from working properly. Honeywell Control Systems Ltd. Arlington Business Park, Bracknell...