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CM721 ..................................2-6
CM727 ................................7-11
USER GUIDE
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CM721 - USER GUIDE Description Features The Honeywell CM721 is a • Ergonomic user inter face featuring an ‘OK-button’. pr ogrammable r oom ther mostat • Large LCD (Liquid Cr ystal Display) Scr een. designed to contr ol your heating • 4 independent temperatur e levels (fr om 5°C to 35°C). system ef ficiently , pr oviding comfor table temperatur es when • Automatic Summer/Winter Time Change. you ar e at home and energy • Optimum Star t to achieve the right temperatur
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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). If the room temperature is already displayed move on to Step 2: Setting the Date and Time. To install the Batteries: a. Lift up the front cover of the thermostat to reveal the battery cover and product controls. b. Rem
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‘Efficient Daily Use’ PROGRAMMING THE CM721 The Built-in Heating Program The built-in heating pr ogram has 4 temperatur e level changes that can be set between 3.00am and 2.50am the following day - allowing you to maintain the evening temperatur e after midnight. Each temperatur e level can be set between 5°C and 35°C, and adjusted in 0.5°C incr ements. The factor y default pr ogram for heating is as follows. Period 1 2 3 4 Time 6:30 8:00 18:00
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OPERATING THE CM721 ‘Using the Features’ Choosing the Operating Mode The ther mostat can operate in thr ee dif fer ent modes: Automatic, Manual or Of f. T o set the operating mode pr ess either of the AUTO , MAN or OFF buttons. The scr een indicates which mode is curr ently active by displaying AUTO , MAN or OFF. • AUTO (automatic) mode sets the ther mostat to follow the built-in temperatur e pr ogram (default or personalised). Operating the ther m
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‘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. • Optimum Start Optimum Start is a program which ensures that the optimum temperature conditions are achieved at the required times. This is an Energy Efficiency feature tha
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TROUBLESHOOTING THE CM721 Symptom Remedy Blank Display (Power Loss). Check batteries ar e installed by r emoving the batter y cover . Check batteries have been installed in the corr ect orientation. Replace the batteries. Display shows flashing The batteries in the ther mostat ar e low on power symbol. - Replace the batteries. Display shows symbol. A fault has occurr ed in your heating system. Remove and r e-inser t the batteries. If the symbol does not clear after a few minutes contac
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CM727 - USER GUIDE Description Features The Honeywell CM727 is a • Ergonomic user inter face featuring an ‘OK-button’. pr ogrammable r oom ther mostat • Large LCD (Liquid Cr ystal Display) Scr een. designed to contr ol your heating • 7-day heating pr ogram to match your lifestyle, whilst system ef ficiently , pr oviding maximising energy savings. comfor table temperatur es when • 4 independent temperatur e levels per day (fr om 5°C to 35°C). you ar e at home and ener
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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). If the room temperature is already displayed move on to Step 2: Setting the Date and Time. To install the Batteries: a. Lift up the front cover of the thermostat to reveal the battery cover and product controls. b. Rem
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‘Efficient Daily Use’ PROGRAMMING THE CM727 The Built-in Heating Program The built-in heating pr ogram has 4 temperatur e level changes per day that can be set between 3.00am and 2.50am the following day - allowing you to maintain the evening temperatur e after midnight. Each temperatur e level can be set between 5°C and 35°C, and adjusted in 0.5°C incr ements. The factor y default pr ogram for heating is as follows. Monday to Friday Period 1 2 3 4
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PROGRAMMING THE CM727 ‘Efficient Daily Use’ f. i) Pr ess the COPY DAY button to copy Monday’ s pr ogram into T uesday . The display will go blank apar t fr om the ‘non flashing’ day indicator , which indicates the day copied and the ‘flashing’ target day to copy the pr ogram to. T o accept this day pr ess the gr een button. T o select a dif fer ent target day pr ess the DATE/DAY button until the ‘flashing’ day indicator is under
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‘Using the Features’ OPERATING THE CM727 During Normal Operation • Temperature Enquiry In AUTO , MAN and OFF operating modes the ther mostat will display the curr ent r oom temperatur e. T o r eview the pr ogrammed ‘target’ temperatur e (the temperatur e which the ther mostat is tr ying to maintain) pr ess the button. This ‘target’ temperatur e value will be displayed flashing for 5 seconds befor e r etur ning to the curr ent r oom temperatur e value.
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PROGRAMMING THE CM727 ‘Using the Features’ Using the Special Features • SERVICE indicator (optional) Note: This option only works if activated by your installer. The 'SERVICE' indicator is displayed at set intervals as a reminder that your heating system requires a routine check. Please call your installer to arrange a maintenance visit. The ‘SERVICE’ indicator will remain on the display of the CM727 until it is either reset or disabled by your installer. The CM727 and heating system wi
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FAQ’s How do I change the batteries on the BDR91 Relay Box Controls Layout thermostat when they run out? The relay box will normally be found mounted close to the boiler. The ther mostat constantly monitors the batter y power level, which typically lasts for about 2 years befor e needing r eplaced. When the power is running low a flashing symbol will be displayed on the scr een. T o change the batteries Push button follow the steps in the above sect
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TROUBLESHOOTING THE CM727 Symptom Remedy Blank Display (Power Loss). Check batteries ar e installed by r emoving the batter y cover . Check batteries have been installed in the corr ect orientation. Replace the batteries. Display shows flashing The batteries in the ther mostat ar e low on power symbol. - Replace the batteries. Display shows symbol. A fault has occurr ed in your heating system. Remove and r e-inser t the batteries. If the symbol does not clear after a few minutes conta
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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. A room thermostat works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached. So, a programmable room thermostat lets you choose
