Honeywell CM721 Thermostat User Manual

Home

href="
CM721..................................2-6  
CM727................................7-11  
USER GUIDE  
href="
CM721 - USER GUIDE  
Description  
Features  
Theꢀ Honeywellꢀ CM721ꢀ isꢀ aꢀ  
programmableꢀ roomꢀ thermostatꢀ  
designedꢀ toꢀ controlꢀ yourꢀ heatingꢀ  
providingꢀ  
•ꢀ Ergonomicꢀuserꢀinterfaceꢀfeaturingꢀanꢀ‘OK-button’.  
LargeꢀLCDꢀ(LiquidꢀCrystalꢀDisplay)ꢀScreen  
.
4ꢀindependentꢀtemperatureꢀlevelsꢀ(fromꢀ5°Cꢀtoꢀ35°C).  
systemꢀ  
efficiently,ꢀ  
comfortableꢀ temperaturesꢀ whenꢀ  
youꢀ areꢀ atꢀ homeꢀ andꢀ energyꢀ  
savingsꢀ whenꢀ youꢀ areꢀ away.ꢀ Theꢀ  
followingꢀ instructionsꢀ explainꢀ howꢀ  
toꢀprogramꢀandꢀuseꢀtheꢀthermostatꢀ  
toꢀprovideꢀtheꢀmostꢀhomeꢀcomfortꢀ  
atꢀtheꢀleastꢀcost.  
•ꢀ AutomaticꢀSummer/WinterꢀTimeꢀChange.  
OptimumꢀStartꢀtoꢀachieveꢀtheꢀrightꢀtemperatureꢀatꢀtheꢀ  
rightꢀtime.  
Built-inꢀMemoryꢀholdsꢀtheꢀuserꢀprogramꢀindefinitely.  
Controls Layout  
1
2
3
4
5
6
7
CM721  
14  
D AT E  
AUTO  
13  
AUTO  
MAN  
OFF  
12  
8
9
PROGRAM  
1. . 4  
11  
10  
1
2
3
4
5
LCDꢀScreen  
6
7
8
9
TemperatureꢀChangeꢀButtons  
TemperatureꢀEnquiryꢀButton  
OperatingꢀModeꢀButtons  
GreenꢀOKꢀButton  
11 BatteryꢀCover  
BatteryꢀLowꢀIndicator  
TimeꢀDisplay  
12 ProgramꢀButtons  
13 TimeꢀChangeꢀButtons  
14 SetꢀDateꢀButton  
BurnerꢀOnꢀIndicator  
TemperatureꢀDisplay  
10 BatteryꢀCompartment  
2
href="
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. Remove the battery cover by pressing down and sliding out.  
c. Insert the 2 x AA LR6 Alkaline Batteries supplied with the thermostat, ensuring the correct  
orientation (see ‘Controls Layout’ on page 2).  
d. After a short pause the thermostat will display information on the screen and is now ready for use.  
e. Replace the battery cover by sliding it firmly back into the front of the thermostat.  
STEP 2: Setting the Date and Time  
To set the Date and Time:  
a.ꢀ PressꢀtheꢀDATEꢀbuttonꢀtoꢀbeginꢀsettingꢀtheꢀdate.ꢀWhen you set  
the date for the first time after the batteries are inserted, the  
display will show:  
Press the  
ꢀorꢀ buttons to set the current day of the month  
st  
(
e.g. d 01 = 1 day of the month) then press the green  
button to confirm.  
b. Press the  
year (e.g. m 01 = January) then press the green  
ꢀorꢀ buttons to set the current month of the  
button to  
confirm.  
c. Press the  
ꢀorꢀ buttons to set the current year (e.g. yr 06  
=
2006) then press the green  
button to confirm.  
The date is now stored.  
d. Use the  
the green  
or  
buttons to set the correct time then press  
button to confirm. Each press of the buttons will  
change the time by one minute and holding them down will  
change the time slowly at first and get progressively quicker.  
AM  
Note: If this mode is entered accidentally then press the  
AUTO, MAN or OFF buttons to exit.  
STEP 3: Running the Built-in Heating Program  
Theꢀthermostatꢀisꢀnowꢀreadyꢀforꢀoperation.ꢀPressꢀtheꢀAUTO buttonꢀandꢀtheꢀbuilt-inꢀheatingꢀprogramꢀ  
willꢀstartꢀrunning.ꢀNote: The built-in heating program has been designed to provide normal comfort  
requirements, but if you want to customise the settings please see the next section ‘Programming  
the CM721’.  
3
href="
Efficient Daily Use’  
PROGRAMMING THE CM721  
The Built-in Heating Program  
Theꢀbuilt-inꢀheatingꢀprogramꢀhasꢀ4ꢀtemperatureꢀlevelꢀchangesꢀthatꢀcanꢀbeꢀsetꢀbetweenꢀ3.00amꢀ  
andꢀ2.50amꢀtheꢀfollowingꢀdayꢀ-ꢀallowingꢀyouꢀtoꢀmaintainꢀtheꢀeveningꢀtemperatureꢀafterꢀmidnight.ꢀ  
Eachꢀtemperatureꢀlevelꢀcanꢀbeꢀsetꢀbetweenꢀ5°Cꢀandꢀ35°C,ꢀandꢀadjustedꢀinꢀ0.5°Cꢀincrements.ꢀTheꢀ  
factoryꢀdefaultꢀprogramꢀforꢀheatingꢀisꢀasꢀfollows.  
Period  
1
2
3
4
Timeꢀ  
Temperatureꢀ  
6:30ꢀ  
21°Cꢀ  
8:00ꢀ  
18°Cꢀ  
18:00ꢀ  
21°Cꢀ  
22:30  
16°C  
Reviewing the Heating Program  
ToꢀreviewꢀorꢀeditꢀtheꢀheatingꢀprogramꢀuseꢀtheꢀPROGRAM  
ꢀorꢀ ꢀbuttonsꢀtoꢀnavigateꢀbetweenꢀ  
theꢀ4ꢀindividualꢀprogrammingꢀperiods.  
Modifying the Heating Program  
To change the heating program:  
a.ꢀ Pressꢀ eitherꢀ ofꢀ theꢀ PROGRAM  
ꢀ orꢀ ꢀ buttonsꢀ toꢀ  
enterꢀtheꢀprogrammingꢀmode.ꢀTheꢀtimeꢀ/ꢀtemperatureꢀ  
settingsꢀforꢀperiodꢀ 1 ꢀꢀwillꢀbeꢀflashingꢀasꢀshown.ꢀTheꢀ  
activeꢀ periodꢀ isꢀ highlightedꢀ byꢀ aꢀ flashingꢀ squareꢀ  
aroundꢀtheꢀnumbersꢀatꢀtheꢀbottomꢀofꢀtheꢀscreen.  
1
2 3 4  
b.ꢀ Toꢀadjustꢀtheꢀperiodꢀstartꢀtimeꢀuseꢀtheꢀ  
ꢀorꢀ ꢀbuttons,ꢀtheꢀdisplayꢀwillꢀstopꢀflashingꢀandꢀtheꢀ  
OK?’ꢀindicatorꢀwillꢀbeꢀdisplayed.ꢀHoldingꢀtheꢀbuttonꢀdownꢀwillꢀchangeꢀtheꢀtimeꢀquickly.  
Note: If you are pressing the  
or  
buttons and the display flashes the next period, it  
means the next period will be pushed forward.  
c.ꢀ Onceꢀtheꢀrequiredꢀtimeꢀisꢀreachedꢀpressꢀtheꢀgreenꢀ  
ꢀbuttonꢀtoꢀconfirm.  
Note: If the original time setting did not require adjustment press the green  
to step ‘d’.  
button to move  
ꢀorꢀ  
d.ꢀ Theꢀtemperatureꢀsettingꢀforꢀperiodꢀ 1 ꢀwillꢀnowꢀbeꢀflashing.ꢀToꢀadjustꢀthisꢀpressꢀtheꢀ  
buttonsꢀandꢀconfirmꢀtheꢀsettingꢀagainꢀbyꢀpressingꢀtheꢀgreenꢀ ꢀbutton.  
e. Theꢀnextꢀtimeꢀandꢀtemperatureꢀperiodꢀwillꢀnowꢀbeꢀactive.ꢀAdjustꢀthisꢀbyꢀrepeatingꢀstepsꢀb - d  
aboveꢀuntilꢀallꢀ4ꢀperiodsꢀareꢀsetꢀorꢀpressꢀtheꢀAUTO buttonꢀtoꢀrunꢀtheꢀprogramꢀasꢀset,ꢀatꢀanyꢀtime.  
Disabling / Enabling Time Periods  
Theꢀthermostatꢀhasꢀ4ꢀperiodsꢀthatꢀcanꢀbeꢀprogrammed,ꢀbutꢀyouꢀmayꢀnotꢀneedꢀallꢀofꢀtheseꢀswitchꢀ  
pointsꢀforꢀyourꢀheatingꢀrequirements.ꢀTherefore,ꢀanyꢀperiodꢀfromꢀ2ꢀtoꢀ4ꢀcanꢀbeꢀremovedꢀfromꢀ(orꢀ  
returnedꢀto)ꢀtheꢀheatingꢀprogramꢀprofile.  
To disable or enable time periods:  
a.ꢀ Toꢀdisableꢀunwantedꢀperiodsꢀgoꢀtoꢀtheꢀdesiredꢀperiodꢀ( 2 ꢀtoꢀ 4 )ꢀꢀusingꢀtheꢀPROGRAM  
ꢀorꢀ  
buttonsꢀtoꢀnavigate,ꢀensureꢀtheꢀcorrectꢀperiodꢀisꢀhighlightedꢀwithꢀtheꢀflashingꢀsquareꢀsymbol.ꢀ  
Pressꢀandꢀholdꢀtheꢀ ꢀbuttonꢀforꢀatꢀleastꢀ2ꢀsecondsꢀandꢀtheꢀdisplayꢀwillꢀindicateꢀtheꢀperiodꢀhasꢀ  
beenꢀremovedꢀfromꢀtheꢀprogram.  
b.ꢀ Toꢀenableꢀperiodsꢀagainꢀfollowꢀtheꢀsameꢀprocedureꢀasꢀabove,ꢀnavigatingꢀtoꢀtheꢀalreadyꢀdisabledꢀ  
period.ꢀToꢀenableꢀthisꢀperiodꢀagainꢀpressꢀandꢀholdꢀtheꢀ ꢀbuttonꢀforꢀatꢀleastꢀ2ꢀseconds.  
4
href="
OPERATING THE CM721  
‘Using the Features’  
Choosing the Operating Mode  
Theꢀthermostatꢀcanꢀoperateꢀinꢀthreeꢀdifferentꢀmodes:ꢀAutomatic,ꢀManualꢀorꢀOff.ꢀToꢀsetꢀtheꢀoperatingꢀ  
modeꢀ pressꢀ eitherꢀ ofꢀ theꢀ AUTO,ꢀ MAN orꢀ OFF buttons.ꢀ Theꢀ screenꢀ indicatesꢀ whichꢀ modeꢀ isꢀ  
currentlyꢀactiveꢀbyꢀdisplayingꢀAUTO,ꢀMAN orꢀOFF.  
AUTO (automatic)ꢀmodeꢀsetsꢀtheꢀthermostatꢀtoꢀfollowꢀtheꢀbuilt-inꢀtemperatureꢀprogramꢀ(defaultꢀ  
orꢀpersonalised).ꢀOperatingꢀtheꢀthermostatꢀinꢀthisꢀmodeꢀisꢀtheꢀbestꢀwayꢀtoꢀmaintainꢀaꢀhighꢀlevelꢀ  
ofꢀtemperatureꢀcomfortꢀwhilstꢀmaximisingꢀyourꢀenergyꢀsavings.  
MAN (manual) modeꢀ setsꢀ theꢀ thermostatꢀ toꢀ actꢀ asꢀ aꢀ simpleꢀ thermostatꢀ withꢀ aꢀ fixedꢀ setpointꢀ  
throughoutꢀtheꢀday.ꢀTheꢀsetpointꢀcanꢀbeꢀadjustedꢀfromꢀ5°Cꢀtoꢀ35°Cꢀbyꢀusingꢀtheꢀ  
ꢀorꢀ ꢀbuttons.ꢀ  
Theꢀthermostatꢀwillꢀcontinueꢀtoꢀmaintainꢀthisꢀtemperatureꢀuntilꢀanotherꢀoperatingꢀmodeꢀorꢀtemperatureꢀ  
isꢀselected.  
OFFꢀmodeꢀsetsꢀtheꢀthermostatꢀtoꢀcontrolꢀtoꢀaꢀminimumꢀtemperatureꢀsettingꢀofꢀ5°Cꢀ(default)ꢀthatꢀ  
actsꢀasꢀaꢀfrostꢀprotectionꢀmeasureꢀforꢀyourꢀhome.  
During Normal Operation  
Temperature Enquiry  
Inꢀ AUTO,ꢀ MAN andꢀ OFF operatingꢀ modesꢀ theꢀ thermostatꢀ willꢀ displayꢀ theꢀ currentꢀ roomꢀ  
temperature.ꢀ Toꢀ reviewꢀ theꢀ programmedꢀ ‘target’ꢀ temperatureꢀ (theꢀ temperatureꢀ whichꢀ theꢀ  
thermostatꢀ isꢀ tryingꢀ toꢀ maintain)ꢀ pressꢀ theꢀ ꢀ button.ꢀ Thisꢀ ‘target’ꢀ temperatureꢀ valueꢀ willꢀ beꢀ  
displayedꢀflashingꢀforꢀ5ꢀsecondsꢀbeforeꢀreturningꢀtoꢀtheꢀcurrentꢀroomꢀtemperatureꢀvalue.ꢀ  
Temperature Override  
Duringꢀnormalꢀoperationꢀ(AUTOꢀmode)ꢀtheꢀprogrammedꢀtemperatureꢀcanꢀbeꢀadjustedꢀmanuallyꢀ  
byꢀpressingꢀtheꢀ  
flashꢀforꢀ5ꢀsecondsꢀ-ꢀduringꢀthisꢀtimeꢀtheꢀ  
Note: This temperature override is cancelled at the next programmed temperature change.  
ꢀorꢀ ꢀbuttonsꢀorꢀtheꢀ ꢀbutton.ꢀTheꢀ‘target’ꢀtemperatureꢀwillꢀbeꢀdisplayedꢀandꢀ  
ꢀorꢀ ꢀbuttonsꢀcanꢀbeꢀusedꢀtoꢀmodifyꢀtheꢀsetꢀvalue.ꢀ  
Adjusting the Time  
Toꢀadjustꢀonlyꢀtheꢀtimeꢀduringꢀnormalꢀoperationꢀuseꢀtheꢀ  
ꢀorꢀ ꢀbuttonsꢀtoꢀadjustꢀtheꢀtimeꢀandꢀ  
pressꢀtheꢀgreenꢀ  
ꢀbuttonꢀagainꢀtoꢀconfirmꢀanyꢀchanges.  
Using the Special Features  
SERVICE indicator  
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 CM721 until it is either reset or disabled by  
your installer. The CM721 and heating system will  
continue to operate as normal.  
5
href="
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 that adjusts the start time  
of your heating system depending upon how cold it is. For example, on cold days your heating  
system will be started earlier to ensure that your home is warm when you get up (at the target  
temperature) and on warmer days the heating system will be started later to save energy. So,  
if the Optimum Start Feature is used, then the time / temperature settings which are entered  
into the thermostat should be set to when you want to be warm by and not when you want the  
heating system to start.  
FAQ’s  
How do I change the batteries on the  
thermostat when they run out?  
BDR91 Relay Box Controls Layout  
The relay box will normally be found mounted  
close to the boiler.  
Theꢀ thermostatꢀ constantlyꢀ monitorsꢀ theꢀ batteryꢀ  
powerꢀ level,ꢀ whichꢀ typicallyꢀ lastsꢀ forꢀ aboutꢀ 2ꢀ  
yearsꢀbeforeꢀneedingꢀreplaced.ꢀWhenꢀtheꢀpowerꢀ  
isꢀ runningꢀ lowꢀ aꢀ flashingꢀ  
ꢀ symbolꢀ willꢀ beꢀ  
displayedꢀonꢀtheꢀscreen.ꢀToꢀchangeꢀtheꢀbatteriesꢀ  
followꢀtheꢀstepsꢀinꢀtheꢀaboveꢀsectionꢀ(‘STEP 1:  
Installing the Batteries’ꢀonꢀpageꢀ3),ꢀreplacingꢀ  
theꢀ usedꢀ batteriesꢀ withꢀ newꢀ onesꢀ inꢀ Stepꢀ c.ꢀ  
Note:ꢀWhileꢀchangingꢀtheꢀbatteriesꢀyourꢀprogramꢀ  
settingsꢀwillꢀbeꢀstoredꢀbutꢀyouꢀmayꢀneedꢀtoꢀadjustꢀ  
theꢀtimeꢀsettingsꢀtoꢀbeꢀcorrect.  
Push button  
and relay  
status LED’s  
How do I set one temperature for the  
whole day?  
What does it mean when the BDR91  
relay box green LED is ON?  
Toꢀ operateꢀ asꢀ aꢀ simpleꢀ thermostatꢀ withꢀ oneꢀ  
temperatureꢀ throughoutꢀ theꢀ day,ꢀ selectꢀ theꢀ  
manualꢀ operatingꢀ modeꢀ byꢀ pressingꢀ theꢀ  
MANꢀ button.ꢀ Adjustꢀ theꢀ temperatureꢀ byꢀ  
The green LED indicates normal operation of  
the radio frequency system. When the green  
LED is ON the boiler is also ON. When the LED  
is OFF the boiler is OFF.  
pressingꢀtheꢀ  
ꢀorꢀ ꢀbuttonsꢀ-ꢀthisꢀcanꢀbeꢀ  
setꢀanywhereꢀfromꢀ5°Cꢀtoꢀ35°Cꢀinꢀ0.5°Cꢀsteps.ꢀ  
Theꢀ thermostatꢀ willꢀ continueꢀ toꢀ maintainꢀ thisꢀ  
temperatureꢀ untilꢀ anotherꢀ operatingꢀ modeꢀ isꢀ  
selectedꢀorꢀtheꢀtemperatureꢀisꢀadjusted.  
When do I need to use the push  
button?  
You should use the push button to control your  
boiler only when the RF communication is lost  
(
see the Troubleshooting Guide).  
6
href="
TROUBLESHOOTING THE CM721  
Symptom  
Remedy  
BlankꢀDisplayꢀ(PowerꢀLoss).  
Checkꢀbatteriesꢀareꢀinstalledꢀbyꢀremovingꢀtheꢀbatteryꢀ  
cover.  
Checkꢀbatteriesꢀhaveꢀbeenꢀinstalledꢀinꢀtheꢀcorrectꢀ  
orientation.  
Replaceꢀtheꢀbatteries.  
Displayꢀshowsꢀflashingꢀ  
symbol.  
Theꢀbatteriesꢀinꢀtheꢀthermostatꢀareꢀlowꢀonꢀpowerꢀ  
-ꢀReplaceꢀtheꢀbatteries.  
Displayꢀshowsꢀ  
ꢀsymbol.  
Aꢀfaultꢀhasꢀoccurredꢀinꢀyourꢀheatingꢀsystem.ꢀRemoveꢀ  
andꢀre-insertꢀtheꢀbatteries.  
Ifꢀtheꢀ  
ꢀsymbolꢀdoesꢀnotꢀclearꢀafterꢀaꢀfewꢀminutesꢀ  
contactꢀyourꢀinstaller.  
Displayꢀshowsꢀtheꢀwordꢀ'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.  
Call your installer to arrange a maintenance visit.  
Note: The CM721 and heating system will continue to  
operate as normal.  
BDR91ꢀredꢀLEDꢀisꢀconstantlyꢀonꢀ  
orꢀflashing  
RF communication lost due to the wrong location of  
the room unit - Hook the room unit back on the wall  
bracket where RF communication was reliable.  
Call installer  
NOTE: You can control the boiler manually when the  
RF communication is lost: Press the BDR91 push  
button to switch the boiler on and off. When the green  
LED is on – the boiler is on.  
7
href="
CM727 - USER GUIDE  
Description  
Features  
Theꢀ Honeywellꢀ CM727ꢀ isꢀ aꢀ •ꢀ Ergonomicꢀuserꢀinterfaceꢀfeaturingꢀanꢀ‘OK-button’.  
programmableꢀ roomꢀ thermostatꢀ •ꢀ LargeꢀLCDꢀ(LiquidꢀCrystalꢀDisplay)ꢀScreen.  
designedꢀ toꢀ controlꢀ yourꢀ heatingꢀ  
7-dayꢀheatingꢀprogramꢀtoꢀmatchꢀyourꢀlifestyle,ꢀwhilstꢀ  
maximisingꢀenergyꢀsavings.  
4ꢀindependentꢀtemperatureꢀlevelsꢀperꢀdayꢀ(fromꢀ5°Cꢀtoꢀ35°C).  
Holidayꢀbuttonꢀsavesꢀenergyꢀbyꢀlettingꢀyouꢀreduceꢀtheꢀ  
temperatureꢀforꢀ1ꢀtoꢀ99ꢀdays.  
systemꢀ  
efficiently,ꢀ  
providingꢀ  
comfortableꢀ temperaturesꢀ whenꢀ  
youꢀ areꢀ atꢀ homeꢀ andꢀ energyꢀ  
savingsꢀ whenꢀ youꢀ areꢀ away.ꢀ Theꢀ  
followingꢀ instructionsꢀ explainꢀ howꢀ  
toꢀprogramꢀandꢀuseꢀtheꢀthermostatꢀ •ꢀ AutomaticꢀSummer/WinterꢀTimeꢀChange.  
toꢀprovideꢀtheꢀmostꢀhomeꢀcomfortꢀ •ꢀ OptimumꢀStartꢀtoꢀachieveꢀtheꢀrightꢀtemperatureꢀatꢀtheꢀ  
atꢀtheꢀleastꢀcost.  
rightꢀtime.  
Built-inꢀMemoryꢀholdsꢀtheꢀuserꢀprogramꢀindefinitely.  
Controls Layout  
1
2
3
4
5
6
17  
7
8
1
2
3
4
5
6
7
CM727  
DATE/  
DAY  
16  
AUTO  
COPY  
DAY  
15  
AUTO  
MAN  
OFF  
14  
9
PROGRAM  
1. . 4  
13  
10  
12  
11  
1
2
3
4
5
6
LCDꢀScreen  
7
8
9
TemperatureꢀChangeꢀButtons  
TemperatureꢀEnquiryꢀButton  
OperatingꢀModeꢀButtons  
13 HolidayꢀFunctionꢀButton  
14 ProgramꢀButtons  
BatteryꢀLowꢀIndicator  
TimeꢀDisplay  
15 CopyꢀDayꢀButton  
BurnerꢀOnꢀIndicator  
DayꢀIndicator  
10 GreenꢀOKꢀButton  
11 BatteryꢀCompartment  
12 BatteryꢀCover  
16 SetꢀDate/DayꢀButton  
17 TimeꢀChangeꢀButtons  
TemperatureꢀDisplay  
8
href="
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. Remove the battery cover by pressing down and sliding out.  
c. Insert the 2 x AA LR6 Alkaline Batteries supplied with the thermostat, ensuring the correct  
orientation (see ‘Controls Layout’ on page 8).  
d. After a short pause the thermostat will display information on the screen and is now ready for use.  
e. Replace the battery cover by sliding it firmly back into the front of the thermostat.  
STEP 2: Setting the Date and Time  
To set the Date and Time:  
a.ꢀ PressꢀtheꢀDATE/DAYꢀbuttonꢀtoꢀbeginꢀsettingꢀtheꢀdate.ꢀWhen  
you set the date for the first time after the batteries are inserted,  
the display will show:  
Press the  
ꢀorꢀ buttons to set the current day of the month  
st  
(
e.g. d 01 = 1 day of the month) then press the green  
button to confirm.  
b. Press the  
year (e.g. m 01 = January) then press the green  
ꢀorꢀ buttons to set the current month of the  
button to  
confirm.  
c. Press the  
ꢀorꢀ buttons to set the current year (e.g. yr 06  
=
2006) then press the green  
button to confirm.  
The date is now stored and the Day Indicator will be displayed  
under the current day of the week (e.g. 1 = Monday, 2 =  
Tuesday, etc.)  
d. Use the  
the green  
or buttons to set the correct time then press  
button to confirm. Each press of the buttons will  
change the time by one minute and holding them down will  
change the time slowly at first and get progressively quicker.  
AM  
Note: If this mode is entered accidentally then press the  
AUTO, MAN or OFF buttons to exit.  
STEP 3: Running the Built-in Heating Program  
Theꢀthermostatꢀisꢀnowꢀreadyꢀforꢀoperation.ꢀPressꢀtheꢀAUTO buttonꢀandꢀtheꢀbuilt-inꢀheatingꢀprogramꢀ  
willꢀstartꢀrunning.ꢀNote: The built-in heating program has been designed to provide normal comfort  
requirements, but if you want to customise the settings please see the next section ‘Programming  
the CM727’.  
9
href="
Efficient Daily Use’  
PROGRAMMING THE CM727  
The Built-in Heating Program  
Theꢀbuilt-inꢀheatingꢀprogramꢀhasꢀ4ꢀtemperatureꢀlevelꢀchangesꢀperꢀdayꢀthatꢀcanꢀbeꢀsetꢀbetweenꢀ  
.00amꢀandꢀ2.50amꢀtheꢀfollowingꢀdayꢀ-ꢀallowingꢀyouꢀtoꢀmaintainꢀtheꢀeveningꢀtemperatureꢀafterꢀ  
3
midnight.ꢀ Eachꢀ temperatureꢀ levelꢀ canꢀ beꢀ setꢀ betweenꢀ 5°Cꢀ andꢀ 35°C,ꢀ andꢀ adjustedꢀ inꢀ 0.5°Cꢀ  
increments.ꢀTheꢀfactoryꢀdefaultꢀprogramꢀforꢀheatingꢀisꢀasꢀfollows.  
Monday to Friday  
Day 1 to 5)  
Period  
1
2
3
4
(
Timeꢀ  
Temperatureꢀ  
6:30ꢀ  
21°Cꢀ  
8:00ꢀ  
18°Cꢀ  
18:00ꢀ  
21°Cꢀ  
22:30  
16°C  
Saturday & Sunday  
Day 6 & 7)  
Period  
1
2
3
4
(
Timeꢀ  
Temperatureꢀ  
8:00ꢀ  
21°Cꢀ  
10:00ꢀ  
21°Cꢀ  
18:00ꢀ  
21°Cꢀ  
23:00  
16°C  
Reviewing the Heating Program  
ToꢀreviewꢀorꢀeditꢀtheꢀheatingꢀprogramꢀuseꢀtheꢀPROGRAM  
ꢀindividualꢀprogrammingꢀperiodsꢀforꢀthatꢀday.ꢀUseꢀtheꢀDATE/DAY buttonꢀtoꢀstepꢀthroughꢀeachꢀdayꢀofꢀ  
ꢀorꢀ ꢀbuttonsꢀtoꢀnavigateꢀbetweenꢀtheꢀ  
4
theꢀweek,ꢀsoꢀtheꢀcompleteꢀ7ꢀdayꢀheatingꢀprogramꢀcanꢀbeꢀreviewedꢀorꢀedited.  
Modifying the Heating Program  
To change the heating program:  
1
2
3
4
5
6
7
a. Pressꢀ eitherꢀ ofꢀ theꢀ PROGRAM  
enterꢀtheꢀprogrammingꢀmode.ꢀTheꢀtimeꢀ/ꢀtemperatureꢀ  
settingsꢀ forꢀ periodꢀ ꢀ onꢀ Mondayꢀ (Dayꢀ 1)ꢀ willꢀ beꢀ  
ꢀ orꢀ  
ꢀ buttonsꢀ toꢀ  
1
flashingꢀasꢀshown.ꢀTheꢀactiveꢀperiodꢀisꢀhighlightedꢀbyꢀ  
aꢀflashingꢀsquareꢀaroundꢀtheꢀnumbersꢀatꢀtheꢀbottomꢀofꢀ  
theꢀscreenꢀandꢀtheꢀselectedꢀdayꢀisꢀshownꢀwithꢀtheꢀdayꢀ  
indicator.  
1
2 3 4  
b. Toꢀadjustꢀtheꢀperiodꢀstartꢀtimeꢀuseꢀtheꢀ  
ꢀorꢀ ꢀbuttons,ꢀtheꢀ‘OK?’ꢀindicatorꢀwillꢀbeꢀdisplayedꢀtoꢀ  
confirmꢀtheꢀchange.ꢀHoldingꢀtheꢀbuttonꢀdownꢀwillꢀchangeꢀtheꢀtimeꢀquickly.  
Note: If you are pressing the  
or  
buttons and the display flashes the next period, it  
means the next period will be pushed forward.  
c.ꢀ Onceꢀtheꢀrequiredꢀtimeꢀisꢀreachedꢀpressꢀtheꢀgreenꢀ  
ꢀbuttonꢀtoꢀconfirm.  
Note: If the original time setting did not require adjustment press the green  
to step ‘d’.  
button to move  
d.ꢀ Theꢀtemperatureꢀsettingꢀforꢀperiodꢀ 1 ꢀonꢀMondayꢀ(Dayꢀ1)ꢀwillꢀnowꢀbeꢀflashing.ꢀToꢀadjustꢀthisꢀ  
pressꢀtheꢀ ꢀorꢀ ꢀbuttonsꢀandꢀconfirmꢀtheꢀsettingꢀagainꢀbyꢀpressingꢀtheꢀgreenꢀ ꢀbutton.  
e.ꢀ Theꢀnextꢀtimeꢀandꢀtemperatureꢀperiodꢀwillꢀnowꢀbeꢀactive.ꢀAdjustꢀthisꢀbyꢀrepeatingꢀstepsꢀbꢀ-ꢀdꢀ  
aboveꢀuntilꢀallꢀ4ꢀperiodsꢀareꢀsetꢀforꢀMondayꢀorꢀpressꢀtheꢀAUTO buttonꢀtoꢀrunꢀtheꢀprogramꢀasꢀ  
set,ꢀatꢀanyꢀtime.  
You now have a choice of how to set the program for the next day:  
10  
href="
PROGRAMMING THE CM727  
‘Efficient Daily Use’  
f. i)ꢀPressꢀtheꢀCOPY DAYꢀbuttonꢀtoꢀcopyꢀMonday’sꢀprogramꢀintoꢀTuesday.ꢀTheꢀdisplayꢀwillꢀgoꢀblankꢀ  
apartꢀfromꢀtheꢀ‘nonꢀflashing’ꢀdayꢀindicator,ꢀwhichꢀindicatesꢀtheꢀdayꢀcopiedꢀandꢀtheꢀ‘flashing’ꢀtargetꢀ  
dayꢀtoꢀcopyꢀtheꢀprogramꢀto.ꢀToꢀacceptꢀthisꢀdayꢀpressꢀtheꢀgreenꢀ  
targetꢀ dayꢀ pressꢀ theꢀ DATE/DAYꢀ buttonꢀ untilꢀ theꢀ ‘flashing’ꢀ dayꢀ indicatorꢀ isꢀ underꢀ theꢀ requiredꢀ  
day,ꢀthenꢀacceptꢀitꢀbyꢀpressingꢀtheꢀgreenꢀ ꢀbutton.ꢀNote: Once the target day is confirmed it  
ꢀbutton.ꢀToꢀselectꢀaꢀdifferentꢀ  
becomes the day that is copied if the COPY DAY button is pressed again.  
OR  
ii)ꢀPressꢀtheꢀDATE/DAY buttonꢀtoꢀmoveꢀtheꢀdayꢀindicatorꢀtoꢀTuesdayꢀ(Dayꢀ2).ꢀTheꢀprogramꢀforꢀthatꢀ  
dayꢀcanꢀthenꢀbeꢀadjustedꢀbyꢀfollowingꢀstepsꢀb to e.ꢀProgramsꢀforꢀtheꢀremainingꢀdaysꢀcanꢀbeꢀsetꢀinꢀ  
theꢀsameꢀway,ꢀusingꢀtheꢀDATE/DAY buttonꢀtoꢀmoveꢀtoꢀtheꢀnextꢀday.  
ToꢀexitꢀtheꢀprogrammingꢀmodeꢀselectꢀtheꢀdesiredꢀoperatingꢀmodeꢀbyꢀpressingꢀtheꢀAUTO,ꢀMAN orꢀ  
OFF buttons.ꢀNote: To run the adjusted program select the AUTO mode.  
Disabling / Enabling Time Periods  
Theꢀthermostatꢀhasꢀ4ꢀperiodsꢀeachꢀdayꢀthatꢀcanꢀbeꢀprogrammed,ꢀbutꢀyouꢀmayꢀnotꢀneedꢀallꢀofꢀtheseꢀ  
switchꢀpointsꢀforꢀyourꢀheatingꢀrequirements.ꢀTherefore,ꢀanyꢀperiodꢀfromꢀ2ꢀtoꢀ4ꢀcanꢀbeꢀremovedꢀfromꢀ  
(
orꢀreturnedꢀto)ꢀtheꢀheatingꢀprogramꢀprofile.  
To disable or enable time periods:  
a.ꢀ Toꢀdisableꢀunwantedꢀperiodsꢀgoꢀtoꢀtheꢀdesiredꢀperiodꢀ( 2 ꢀtoꢀ 4 )ꢀꢀusingꢀtheꢀPROGRAM  
ꢀorꢀ  
buttonsꢀtoꢀnavigate,ꢀensureꢀtheꢀcorrectꢀperiodꢀisꢀhighlightedꢀwithꢀtheꢀflashingꢀsquareꢀsymbol.ꢀ  
Pressꢀandꢀholdꢀtheꢀ ꢀbuttonꢀforꢀatꢀleastꢀ2ꢀsecondsꢀandꢀtheꢀdisplayꢀwillꢀindicateꢀtheꢀperiodꢀhasꢀ  
beenꢀremovedꢀfromꢀtheꢀprogram.  
b.ꢀ Toꢀenableꢀperiodsꢀagainꢀfollowꢀtheꢀsameꢀprocedureꢀasꢀabove,ꢀnavigatingꢀtoꢀtheꢀalreadyꢀdisabledꢀ  
period.ꢀToꢀenableꢀthisꢀperiodꢀagainꢀpressꢀandꢀholdꢀtheꢀ ꢀbuttonꢀforꢀatꢀleastꢀ2ꢀseconds.  
OPERATING THE CM727  
‘Using the Features’  
Choosing the Operating Mode  
Theꢀthermostatꢀcanꢀoperateꢀinꢀthreeꢀdifferentꢀmodes:ꢀAutomatic,ꢀManualꢀorꢀOff.ꢀToꢀsetꢀtheꢀoperatingꢀ  
modeꢀ pressꢀ eitherꢀ ofꢀ theꢀ AUTO,ꢀ MAN orꢀ OFF buttons.ꢀ Theꢀ screenꢀ indicatesꢀ whichꢀ modeꢀ isꢀ  
currentlyꢀactiveꢀbyꢀdisplayingꢀAUTO,ꢀMAN orꢀOFF.  
AUTO (automatic)ꢀmodeꢀsetsꢀtheꢀthermostatꢀtoꢀfollowꢀtheꢀbuilt-inꢀtemperatureꢀprogramꢀ(defaultꢀ  
orꢀpersonalised).ꢀOperatingꢀtheꢀthermostatꢀinꢀthisꢀmodeꢀisꢀtheꢀbestꢀwayꢀtoꢀmaintainꢀaꢀhighꢀlevelꢀ  
ofꢀtemperatureꢀcomfortꢀwhilstꢀmaximisingꢀyourꢀenergyꢀsavings.  
MAN (manual)ꢀmodeꢀsetsꢀtheꢀthermostatꢀtoꢀactꢀasꢀaꢀsimpleꢀthermostatꢀwithꢀaꢀfixedꢀsetpointꢀ  
throughoutꢀtheꢀday.ꢀTheꢀsetpointꢀcanꢀbeꢀadjustedꢀfromꢀ5°Cꢀtoꢀ35°Cꢀbyꢀusingꢀtheꢀ  
ꢀorꢀ  
buttons.ꢀTheꢀthermostatꢀwillꢀcontinueꢀtoꢀmaintainꢀthisꢀtemperatureꢀuntilꢀanotherꢀoperatingꢀmodeꢀ  
orꢀtemperatureꢀisꢀselected.  
OFFꢀmodeꢀsetsꢀtheꢀthermostatꢀtoꢀcontrolꢀtoꢀaꢀminimumꢀtemperatureꢀsettingꢀofꢀ5°Cꢀ(default)ꢀthatꢀ  
actsꢀasꢀaꢀfrostꢀprotectionꢀmeasureꢀforꢀyourꢀhome.  
11  
href="
Using the Features’  
OPERATING THE CM727  
During Normal Operation  
Temperature Enquiry  
Inꢀ AUTO,ꢀ MAN andꢀ OFF operatingꢀ modesꢀ theꢀ thermostatꢀ willꢀ displayꢀ theꢀ currentꢀ roomꢀ  
temperature.ꢀ Toꢀ reviewꢀ theꢀ programmedꢀ ‘target’ꢀ temperatureꢀ (theꢀ temperatureꢀ whichꢀ theꢀ  
thermostatꢀ isꢀ tryingꢀ toꢀ maintain)ꢀ pressꢀ theꢀ ꢀ button.ꢀ Thisꢀ ‘target’ꢀ temperatureꢀ valueꢀ willꢀ beꢀ  
displayedꢀflashingꢀforꢀ5ꢀsecondsꢀbeforeꢀreturningꢀtoꢀtheꢀcurrentꢀroomꢀtemperatureꢀvalue.ꢀ  
Temperature Override  
Duringꢀnormalꢀoperationꢀ(AUTOꢀmode)ꢀtheꢀprogrammedꢀtemperatureꢀcanꢀbeꢀadjustedꢀmanuallyꢀ  
byꢀpressingꢀtheꢀ  
flashꢀforꢀ5ꢀsecondsꢀ-ꢀduringꢀthisꢀtimeꢀtheꢀ  
Note: This temperature override is cancelled at the next programmed temperature change.  
ꢀorꢀ ꢀbuttonsꢀorꢀtheꢀ ꢀbutton.ꢀTheꢀ‘target’ꢀtemperatureꢀwillꢀbeꢀdisplayedꢀandꢀ  
ꢀorꢀ ꢀbuttonsꢀcanꢀbeꢀusedꢀtoꢀmodifyꢀtheꢀsetꢀvalue.ꢀ  
Adjusting the Time  
To adjust only the time during normal operation use the  
or  
buttons to adjust the time and  
press the green  
button again to confirm any changes.  
Using the Special Functions  
 HOLIDAY Function  
Theꢀholidayꢀfunctionꢀallowsꢀyouꢀtoꢀsetꢀaꢀconstantꢀtemperatureꢀ(defaultꢀ=ꢀ10°C)ꢀforꢀaꢀspecifiedꢀ  
numberꢀofꢀdaysꢀ(fromꢀ1ꢀ-ꢀ99ꢀdays).ꢀThisꢀletsꢀyouꢀsaveꢀenergyꢀandꢀrelatedꢀcostsꢀwhenꢀyouꢀareꢀ  
awayꢀfromꢀhome,ꢀbutꢀresumesꢀnormalꢀoperationꢀonꢀtheꢀdayꢀofꢀyourꢀreturn.  
To set the Holiday function:  
a.ꢀ EnsureꢀtheꢀthermostatꢀisꢀrunningꢀinꢀAUTO orꢀMAN operatingꢀmodes.  
b.ꢀ Pressꢀtheꢀholidayꢀ ꢀbuttonꢀtoꢀdisplayꢀtheꢀholidayꢀdaysꢀcounterꢀandꢀtemperatureꢀsetting,ꢀ  
alongꢀwithꢀtheꢀholidayꢀindicatorꢀ  
.
c.ꢀ Pressꢀtheꢀ  
ꢀorꢀ ꢀtimeꢀbuttonsꢀtoꢀsetꢀtheꢀholidayꢀtimeꢀ(1ꢀ-ꢀ99ꢀdays)ꢀandꢀpressꢀtheꢀgreenꢀ  
buttonꢀtoꢀconfirm.ꢀ  
ꢀorꢀ ꢀbuttonsꢀtoꢀsetꢀtheꢀholidayꢀtemperatureꢀ(5°Cꢀ-ꢀ35°C)ꢀandꢀpressꢀtheꢀgreenꢀ  
d.ꢀ Pressꢀtheꢀ  
buttonꢀtoꢀconfirm.  
Theꢀthermostatꢀwillꢀnowꢀcontrolꢀtoꢀtheꢀnewꢀtemperatureꢀforꢀtheꢀsetꢀnumberꢀofꢀdaysꢀthatꢀyourꢀhomeꢀisꢀ  
vacant.ꢀAtꢀmidnightꢀtheꢀholidayꢀcounterꢀwillꢀbeꢀreducedꢀbyꢀoneꢀuntilꢀtheꢀselectedꢀnumberꢀofꢀdaysꢀhaveꢀ  
passed.ꢀTheꢀthermostatꢀwillꢀthenꢀreturnꢀtoꢀnormalꢀoperationꢀasꢀsetꢀbyꢀtheꢀMAN orꢀAUTO mode.ꢀToꢀ  
cancelꢀtheꢀHOLIDAYꢀfunctionꢀorꢀtoꢀexitꢀtheꢀfunctionꢀatꢀanyꢀtimeꢀpressꢀtheꢀ ꢀbuttonꢀaꢀsecondꢀtime.  
12  
href="
PROGRAMMING THE CM727  
Using the Special Features  
‘Using the 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 will  
continue to operate as normal.  
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.  
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 that adjusts the start time  
of your heating system depending upon how cold it is. For example, on cold days your heating  
system will be started earlier to ensure that your home is warm when you get up (at the target  
temperature) and on warmer days the heating system will be started later to save energy. So,  
if the Optimum Start Feature is used, then the time / temperature settings which are entered  
into the thermostat should be set to when you want to be warm by and not when you want the  
heating system to start.  
13  
href="
FAQ’s  
BDR91 Relay Box Controls Layout  
How do I change the batteries on the  
thermostat when they run out?  
The relay box will normally be found mounted  
close to the boiler.  
Theꢀ thermostatꢀ constantlyꢀ monitorsꢀ theꢀ batteryꢀ  
powerꢀ level,ꢀ whichꢀ typicallyꢀ lastsꢀ forꢀ aboutꢀ 2ꢀ  
yearsꢀbeforeꢀneedingꢀreplaced.ꢀWhenꢀtheꢀpowerꢀ  
isꢀ runningꢀ lowꢀ aꢀ flashingꢀ  
ꢀ symbolꢀ willꢀ beꢀ  
displayedꢀonꢀtheꢀscreen.ꢀToꢀchangeꢀtheꢀbatteriesꢀ  
followꢀtheꢀstepsꢀinꢀtheꢀaboveꢀsectionꢀ(‘STEP 1:  
Installing the Batteries’ꢀonꢀpageꢀ3),ꢀreplacingꢀ  
theꢀ usedꢀ batteriesꢀ withꢀ newꢀ onesꢀ inꢀ Stepꢀ c.ꢀ  
Note:ꢀWhileꢀchangingꢀtheꢀbatteriesꢀyourꢀprogramꢀ  
settingsꢀwillꢀbeꢀstoredꢀbutꢀyouꢀmayꢀneedꢀtoꢀadjustꢀ  
theꢀtimeꢀsettingsꢀtoꢀbeꢀcorrect.  
Push button  
and relay  
status LED’s  
How do I set one temperature for the  
whole day?  
What does it mean when the BDR91  
relay box green LED is ON?  
Toꢀ operateꢀ asꢀ aꢀ simpleꢀ thermostatꢀ withꢀ oneꢀ  
temperatureꢀ throughoutꢀ theꢀ day,ꢀ selectꢀ theꢀ  
manualꢀ operatingꢀ modeꢀ byꢀ pressingꢀ theꢀ  
MANꢀ button.ꢀ Adjustꢀ theꢀ temperatureꢀ byꢀ  
The green LED indicates normal operation of  
the radio frequency system. When the green  
LED is ON the boiler is also ON. When the LED  
is OFF the boiler is OFF.  
pressingꢀtheꢀ  
ꢀorꢀ ꢀbuttonsꢀ-ꢀthisꢀcanꢀbeꢀ  
setꢀanywhereꢀfromꢀ5°Cꢀtoꢀ35°Cꢀinꢀ0.5°Cꢀsteps.ꢀ  
Theꢀ thermostatꢀ willꢀ continueꢀ toꢀ maintainꢀ thisꢀ  
temperatureꢀ untilꢀ anotherꢀ operatingꢀ modeꢀ isꢀ  
selectedꢀorꢀtheꢀtemperatureꢀisꢀadjusted.  
When do I need to use the push  
button?  
You should use the push button to control your  
boiler only when the RF communication is lost  
(
see the Troubleshooting Guide).  
This product and its associated documentation and packaging are protected by various  
intellectual property rights belonging to Honeywell Inc. and its subsidiaries and existing under  
the laws of the UK and other countries. These intellectual and property rights may include patent  
applications, registered designs, unregistered designs, registered trade marks, unregistered  
trade marks and copyrights.  
Honeywell reserves the right to modify this document, product and functionality without notice.  
This document replaces any previously issued instructions and is only applicable to the  
product(s) described.  
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.  
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell  
Technologies Sàrl, ACS-ECC EMEA, Z.A. La Pièce 16, 1180 Rolle, Switzerland by its Authorised  
Representative Honeywell Inc.  
14  
href="
TROUBLESHOOTING THE CM727  
Symptom  
Remedy  
BlankꢀDisplayꢀ(PowerꢀLoss).  
Checkꢀbatteriesꢀareꢀinstalledꢀbyꢀremovingꢀtheꢀbatteryꢀ  
cover.  
Checkꢀbatteriesꢀhaveꢀbeenꢀinstalledꢀinꢀtheꢀcorrectꢀ  
orientation.  
Replaceꢀtheꢀbatteries.  
Displayꢀshowsꢀflashingꢀ  
symbol.  
Theꢀbatteriesꢀinꢀtheꢀthermostatꢀareꢀlowꢀonꢀpowerꢀ  
-ꢀReplaceꢀtheꢀbatteries.  
Displayꢀshowsꢀ  
ꢀsymbol.  
Aꢀfaultꢀhasꢀoccurredꢀinꢀyourꢀheatingꢀsystem.ꢀRemoveꢀ  
andꢀre-insertꢀtheꢀbatteries.  
Ifꢀtheꢀ  
ꢀsymbolꢀdoesꢀnotꢀclearꢀafterꢀaꢀfewꢀminutesꢀ  
contactꢀyourꢀinstaller.  
Displayꢀshowsꢀtheꢀwordꢀ'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.  
BDR91ꢀredꢀLEDꢀisꢀconstantlyꢀonꢀ  
orꢀflashing  
RF communication lost due to the wrong location of  
the room unit - Hook the room unit back on the wall  
bracket where RF communication was reliable.  
Call installer  
NOTE: You can control the boiler manually when the  
RF communication is lost: Press the BDR91 push  
button to switch the boiler on and off. When the green  
LED is on – the boiler is on.  
15  
href="
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 what times you want the heating to be on, and  
what temperature it should reach while it is on. It will allow you to select different temperatures in your  
home at different times of the day (and days of the week) to meet your particular needs.  
Turning a programmable room thermostat to a higher setting will not make the room heat up any faster.  
How quickly the room heats up depends on the design of the heating system, for example, the size  
of boiler and radiators.  
Neither does the setting affect how quickly the room cools down. Turning a programmable room thermostat  
to a lower setting will result in the room being controlled at a lower temperature, and saves energy.  
The way to set and use your programmable room thermostat is to find the lowest temperature settings  
that you are comfortable with at the different times you have chosen, and then leave it alone to do its job.  
The best way to do this is to set low temperatures first, say 18°C, and then turn them up by one degree  
each day until you are comfortable with the temperatures. You won’t have to adjust the thermostat  
further. Any adjustments above these settings will waste energy and cost you more money.  
If your heating system is a boiler with radiators, there will usually be only one programmable room  
thermostat to control the whole house. But you can have different temperatures in individual rooms  
by installing thermostatic radiator valves (TRVs) on individual radiators. If you don’t have TRVs, you  
should choose a temperature that is reasonable for the whole house. If you do have TRVs, you can  
choose a slightly higher setting to make sure that even the coldest room is comfortable, then prevent  
any overheating in other rooms by adjusting the TRVs.  
The time on the programmer must be correct. Some types have to be adjusted in spring and autumn  
at the changes between Greenwich Mean Time and British Summer Time.  
You may be able to temporarily adjust the heating programme, for example, ‘Override’, ‘Advance’ or  
Boost’. These are explained in the manufacturer’s instructions.  
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  
Berkshire  
RG12 1EB  
Technical Help Desk: 08457 678999  
www.honeywelluk.com  
50039991-003ꢀA  
©ꢀ2009ꢀHoneywellꢀInternationalꢀInc.  

Honeywell Rth2310b Thermostat User Manual

Trane 340 Thermostat User Manual

Aube TH140 28 Thermostat User Manual

Bryant T1 PAC Thermostat User Manual

Honeywell CG510A Thermostat User Manual

Honeywell 69 1361 Thermostat User Manual

Honeywell CT31 Thermostat User Manual

Lux Products RS600 Thermostat User Manual

Honeywell Q674A G Thermostat User Manual

Trane RT SVX19A E4 Thermostat User Manual