CM921 - User Guide
Contents
1. WHAT IS A PROGRAMMABLE ROOM THERMOSTAT an explanation for householders ITS A programmable room thermostat is both a programmer and a room lt rk thermostat A programmer allows you to set On and Off time periods to suit i do 7 Mai your own lifestyle A room thermostat works by sensing the air temperature xy Clarity switching on the heating when the air temperature falls below the thermostat approved by Plain English Campaign 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 job2. eeeneeneenennsnnennnnn 8 Temperature Override a 9 Using the Special Functions eeeneneene 9 HOLIDAY Function aaa 9 9 Day Date Display O Slider Switch FINE TUNING THE CM921 Time Display Green OK Button Changing the User Parameters cocino 10 LoT technology Display Program Buttons Change the Time Formaten 11 lo AAA is product and its associated documentation and packaging are protected by various intellectua Reset the Built in Program 1 Th duct and it ted d tati d pack tected b tellectual Heating On Indicator 112 Battery Compartment Lid Summer Winter Time Change 11 property rights belonging to Honeywell Inc and its subsidiaries and existing under the laws of the e as A S UK and other countries These intellectual and property rights may include patent applications Battery Low Indicator Battery Compartment registered designs unregistered designs registered trade marks unregistered trade marks and 9 en cdi a FAQ s amp TROUBLESHOOTING copyrights Temperature Display O Holiday Function Button Trouble Shooting A 12 Honeywell reserves the right to modify this document product and functionality without notice O Temperature Change Buttons o Time Change Buttons Frequently Asked QUESTIONS nn 14 en replaces any previously issued instructions and is only applicable to the product s Temperature Enquiry Button This product has been designed for applications as described within this
3. factory default program or cooling is specified in the table below but this can be modified in the same way as the default heating program Period 1 2 3 4 5 6 Time 6 30 8 00 12 00 14 00 18 00 22 30 Temperature 24 C 28 C 24 C 28 C 24 C 24 C How do I operate an HR 80 radiator controller with my CM921 1 Display Shows current set temperature and device information 2 Adjustment dial on the operating unit Allows manual temperature adjustment 3 Symbol for the RF connection to the command centre 4 Symbol for separating the operating unit and coupling module 5 Settemperature 6 Symbol for actual value coming from the room thermostat see installation manual 4 5 2 Changing the set temperature with adjustment dial The setpoint is normally defined and controlled at the room thermostat To override the local setpoint turn the adjustment dial of the radiator controller unit until the desired set temperature between 5 30 C is displayed This local setpoint override remains valid until a time program from the room thermostats overwrites it automatically In order to open or close the radiator valve completely turn the adjustment dial until OFF closed or ON opened is displayed If temperature limits are set ON OFF is not displayed see installation manual 4 5 1 16 42011077 103 R2
4. the RF communication is reliable in the selected location s Important The Room Unit measures the temperature of the room where it is located It is important that the placement of the Room Unit within the room is away from draughts direct sunlight and other heat sources As this is a wireless device certain objects could interfere with the RF signal Leave at least 30cm distance from any metal objects including wall boxes and at least 1 metre from any other electrical equipment eg radio TV PC etc 14 FAQ s amp TROUBLESHOOTING How do I remove the thermostat from the table stand or wall bracket After programming is finished always replace the thermostat back on the wall holder or table stand Wall bracket Table stand Push button and relay status LED s What does it mean when the BDR91 relay box green LED is ON 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 15 Can I use my CM921 to control my air conditioning system Yes if your system has been set up correctly you can use your thermostat to control he cooling To switch the thermostat between heating and cooling modes press the E and Y buttons together for 5 seconds in any of the product operating modes AUTO MAN or OFF The text COOLING will be displayed for a moment on the screen to indicate the cooling operation is now active The
5. GRAMMING THE CM921 b To adjust the period start time press the or buttons and TIME 1 OK will be displayed Holding the button down will change the time quickly Note If you are pressing the O or buttons and the display flashes the next change period it means the next change will be pushed forward if you continue to press or buttons Press the green button to confirm the setting CHANGES SAVED is displayed for 1 5 seconds then SET TEMP 1 will be shown Note If the original time setting did not require adjustment press the green 19 button to move on to step d The temperature setting for period 1 will now be flashing To adjust this press the E or W buttons and TEMP 1 OK will be displayed Press the green amp button to confirm the setting CHANGES SAVED will be displayed for a moment followed by SET TIME 2 The next time and temperature period will now be active Adjust this by repeating steps b e above until all 6 periods are set or move the slider switch to the AUTO position to run the program as set at any time After setting period 6 CHANGES SAVED will be displayed as before To exit the programming mode move the slider switch to the desired operating mode AUTO MAN or OFF Note To run the adjusted program select the AUTO mode Note If the unit is left in programming mode for more than 10 minutes without the slider being moved or a
6. Systems Ltd Arlington Business Park Bracknell an Honeywell RG12 1EB Technical Help Desk 08457 678999 42011077 103 R2 draft2 www honeywelluk com 2009 Honeywell International Inc CM921 User Guide Honeywell 1 day Wireless Programmable Room Thermostat with LoT technology Description The Honeywell CM921 is a wireless programmable room thermostat designed to control you heating system efficiently providing comfortable temperatures when you are at home and energy savings when you are away With wireless communication there is no need to provide a wired connection between the thermostat and boiler The following instructions explain how to set up program and operate your Honeywell CM921 Programmable Room Thermostat Features Wireless connection to the boiler allows you to mount the Chronotherm in your room without decor disruption Armchair programming feature lets you program your Chronotherm while resting comfortably in your armchair Ergonomic User Interface features an OK button making the CM921 very easy to use so you always stay in control LoT technology provides informative on screen feedback and operational assistance to the user Extra Large LCD Liquid Crystal Display Screen with Backlight provides added user friendliness and clearer viewing even in the dark 6 independent temperature levels per day lets you set any 6 temperatures you require from 5 to 35 C so you
7. 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
8. can enjoy economical comfort every day Holiday button saves energy by letting you reduce the temperature for 1 to 99 days while you are away from home resuming normal operation on your return Automatic Summer Winter Time Change will adjust the clock automatically for Daylight Saving Time Built in Memory holds the user program indefinitely so that it is never lost even if you remove the batteries Optimum Start option is an advanced feature which ensures that the optimum temperature conditions are achieved at the required times option set by your installer Controls Layout Contents GETTING STARTED WITH THE CM921 STEP 1 Installing the Batt rles 3 STEP 2 Setting the Date and Time 4 STEP 3 Running the Built In Heating Program 4 PROGRAMMING THE CM921 The Built in Heating Program ersmernereener nennen nen 5 Reviewing the Heating Program a 5 Modifying the Heating Program 5 Disabling Enabling Time Periods 7 OPERATING THE CM921 Choosing the Operating Mode 8 AUTO mode 224snneennenneennernensnernen nennen 8 MAN Mode inde 8 ORF MOS locas 8 Adjusting the Time serinin irenka 8 During Normal Operalion 8 Temperature Enquiry
9. choose which one of the following parameters you would like to change i Change the time format CLOCK SELECT should be displayed on the screen press the or Y buttons to select the preferred time format 12 AM PM format 24 24hr format and the display will flash indicating a change has been made To confirm this change press the green B button ii Reset the built in program to the factory default Press the time button once The display will show RESET PROGRAM Press the E a or v buttons to select the preferred setting O user program 1 factory program and the display will flash indicating a change has been made To confirm this change press the green 13 button iii Enable or disable summer winter time change Press the time button twice The display will show AUTO CHANGE Press the or Y buttons to select the preferred setting O disabled Off 1 enabled On and the display will flash indicating a change has been made To confirm this change press the green OR button d To exit the user mode move the slider switch to the AUTO MAN or OFF position 11 AQ s amp TROUBLESHOOTING 19 8 su ay eo s lnuluu MO e ul Jos Jeajo JOU SBOP Joqu s pa SU J Jelsowuayl ay ul selayeq ay asul al pue anoulay spuogas Mo e Jaye UO auloo p noys Hulyeay y aunjejadula uano ay anoqe sas1bap may e alnjeradula 195 ay asea aul 0 uolinq 3 ay sseld uedold Buneoliunuuuu
10. d ay u puejs aqu ay UO JeIsouey y aoejdas JO J9x98 1Q EM ay UO YOR Jelsouuey ay YOOH 16409 84 pue 1 lloq ay UBEMJEq uonoauuos ay se jam se Alddns amod L64dg pue Jajoq BY 19ayo O Jejjelsul 294992 12D Je souJeyl ay jo uoneooj Buom y 01 2NP 150 uoneolunuuuuo2 JH uonlo uuo2 e 91110918 BUOM spuo28s M e Jaye uo auoo pinoys Buneay y eunyesedusa WO0 Juano ay enoqe s 1B p mej e aunjesadula ay eseasoU 0 10 y ssid pue NYIN 01 YOUMs Jop js ay SON yeoy 10 1eo Jou s op WEIBOId welsAs Bunesy ay 0 1amod si 9194 YEU Y09949 uu s s Buneay 0 amod ON ESTE ETA plod ool pue joy 00 usemjeq sBuims ainyesodwey Apyoinb 10 Amos 00 440 10 NO Sayojms BunesH Bulyse Jo uo pue suoo s L6YCd 94 UO AI Pal ay uo SI suo u 6 10 yo are sq31 16408 uo yay ms jou s op Bulyeay ay Inq sYlom Ae ds p 497 sielsouu u yl 13 How do I change the batteries on the CM921 when they run out The thermostat constantly monitors the battery power level which typically last for about 2 years before needing replaced When the power is running low a flashing symbol will be displayed on the screen To change the batteries follow the steps in the above section STEP 1 Installing the Batteries on page 3 replacing the used batteries with new ones in step c Note While changing the batteries your program settings will be stored but you ma
11. document For use 9 P un WHAT IS A PROGRAMMABLE ROOM THERMOSTAT outside of the scope as described herein refer to Honeywell for guidance Honeywell cannot be An explanation for householders 2 020 20 held responsible for misapplication of the product s described within this document Manufactured for and on behalf of the Environment and Combustion Controls Division of Honeywell Technologies Sarl ACS ECC EMEA Z A La Piece 16 1180 Rolle Switzerland by its Authorised Representative Honeywell Inc GETTING STARTED WITH THE CM921 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 screen displays some information 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 2x 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 PLEASE RESPECT YOUR ENVIRONMENT Take car
12. e to dispose of used batteries carefully 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 a PROG AUTO OFF UJ MAN Use the or buttons to set 20 003 O SET THE JAY 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 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 o After setting a valid date the time will be displayed Use the or buttons to se he date setting mode digits will begin flashing and SET THE TIME he 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 progressive y 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 COMP LETE Note If the slider switch is moved at any time before DATE COMPLETE is displayed the changes to the date and time w
13. ill 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 CM921 The Built in Heating Program The built in heating program has 6 temperature level changes that can be set between 3 00am and 2 50am 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 1 2 3 4 5 6 Time 6 30 8 00 12 00 14 00 18 00 22 30 Temperature 21 C 18 C 21 C 18 C 21 C 16 C Reviewing the Heating Program To review or edit the heating program move the slider switch to the PROG position then use the or buttons to navigate between the 6 individual programming periods Modifying the Heating Program To change the heating program a Set the slider switch to the PROG position entering programming mode SET TIME 1 will be displayed and the time settings for period will be lashing The active period is highlighted by a flashing square symbol around the numbers at the bottom of the screen PRO
14. ing e CHANGES SAVED will be displayed for a moment followed by TEMP OK Press the or Y 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 a button a second time or move the slider switch to a different position FINE TUNING THE CM921 Changing the User Parameters The user mode allows you to modify some basic settings of the thermostat to meet your personal preferences You can change the time display format 24hr or AM PM reset the heating program to the built in settings and disable or enable the summer winter time change feature To change any of these user s parameters a Move the slider switch to the OFF position then press and hold the f button for approximately 5 seconds button for approximately 5 seconds b Once entered the following information will be shown on the screen 10 FINE TUNING THE CM921 c Now
15. ny buttons pressed MOVE THE SLIDER will be displayed Press a button to finish programming the thermostat or move the slider to select the desired operating mode PROGRAMMING THE CM921 Disabling Enabling Time Periods The thermostat has 6 periods that can be programmed but you may not need all of these switch points for your heating requirements Therefore any period from 2 to 6 can be disabled or enabled as follows To disable time periods Go to the desired period 2 to 6 by moving the slider switch to the PROG position then using the and buttons to navigate ensuring the correct period is highlighted with the flashing square symbol Press and hold the button for at least 2 seconds and the display will indicate the period has been removed from the program To enable time periods Navigate to the disabled period by moving the slider switch to the PROG position then using the and gt buttons Once selected DISABLED will be displayed Press and hold the Al button for at least 2 seconds and ENABLED will be displayed for a moment before returning to normal programming mode OPERATING THE CM921 Choosing the Operating Mode The thermostat can operate in three different modes Automatic Manual or Off To set the operating mode move the slider switch to the desired position The screen indicates which mode is currently active by displaying AUTO MAN or OFF AUTO automatic mode Automatic mode set
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17. s the thermostat to follow the 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 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 E or Y buttons The thermostat will continue to maintain this temperature until another operating mode or temperature is selected OFF mode Off mode sets the thermostat to control to a minimum temperature setting of 5 C default that acts as a frost protection measure for your home This value can be adjusted by calling your installer 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 During Normal Operation Temperature Enquiry In AUTO and MAN operating modes the thermostat will display the current room temperature which is indicated by the text ROOM TEMP displayed on the screen To review the programmed target temperature the temperature which the thermostat is trying to maintain press the a button This target temperature value will be displayed flashing and the text TARGET TEMP will be shown for 5 seconds before returning to the current room temperature value In OFF operating mode
18. the thermostat again displays the current room temperature as above but when the button is pressed the text FROST TEMP is displayed indicating the set value to protect your home To modify this value please contact your installer OPERATING THE CM921 Temperature Override During normal operation AUTO mode the programmed temperature can be adjusted manually by pressing the or Y buttons The target temperature will be displayed and flash for 5 seconds during this time the or Y 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 IM button to display the holiday days counter and temperature setting along with the holiday indicator 1 c The day after the current day will be selected and RETURN DATE OK will be displayed Press the or time 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 Ok button to confirm the sett
19. y need to adjust the time and date settings to be correct How do set one temperature for the whole day To operate as a simple thermostat with one temperature for a period of time move the slider switch to the MAN position Adjust the manual temperature by pressing the or Y buttons This can be set anywhere from 5 C to 35 C in 0 5 C steps The thermostat will continue to maintain this temperature until another operating mode is selected or the temperature is adjusted What is 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 I want to use the table stand instead of wall mounted bracket Where can I position the room unit It is important to keep the room unit in a location where reliable RF communication was proven Advise your installer where would you like to position the room unit and he will check if
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