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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 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  irmly  back  into  the  front  of  the 
thermostat.

GETTING STARTED WITH THE CM921 

PLEASE RESPECT YOUR ENVIRONMENT!

Take care to dispose of used batteries carefully.

Summary of Contents for CM921

Page 1: ...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 d...

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Page 3: ...ram 11 Summer Winter Time Change 11 FAQ s TROUBLESHOOTING Trouble Shooting Guide 12 Frequently Asked Questions 14 WHAT IS A PROGRAMMABLE ROOM THERMOSTAT An explanation for householders 17 Controls Layout Day Date Display Time Display LoT technology Display Heating On Indicator Battery Low Indicator Temperature Display Temperature Change Buttons Temperature Enquiry Button 1 2 3 4 5 6 7 8 9 10 11 12...

Page 4: ...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 ...

Page 5: ...e displayed e Use the or buttons to set the 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 irst and get progressively quicker Once the correct time is set press the green button to conirm then CHANGES SAVED will be displayed for a moment followed by DATE COMPLETE Note If the slider switch is moved at any time befo...

Page 6: ...r 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 1 will be lashing The active period is highlighted by a...

Page 7: ...tons and TEMP 1 OK will be displayed e Press the green button to conirm the setting CHANGES SAVED will be displayed for a moment followed by SET TIME 2 f 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 g After setting period 6 CHANGES SAV...

Page 8: ...position then using the and buttons to navigate ensuring the correct period is highlighted with the lashing 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 buttons Once selected DISABLED ...

Page 9: ...rmostat 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 conirm any changes During Normal Operation Temperature Enquiry In AUTO and MAN operat...

Page 10: ... holiday indicator 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 button to conirm the setting e CHANGES SAVED will be displayed for a moment followed by TEMP OK Press the or buttons to set the holiday temper...

Page 11: ... 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 button for approximately 5 seconds button for approximately 5 seconds b Once entered the following information will be shown on the screen 1 6 CM921 DATE PROG AUTO MAN O...

Page 12: ...s the time button once The display will show RESET PROGRAM Press the or buttons to select the preferred setting 0 user program 1 factory program and the display will lash indicating a change has been made To conirm this change press the green button iii Enable or disable summer winter time change Press the time button twice The display will show AUTO CHANGE Press the or buttons to select the prefe...

Page 13: ... the heating does not switch on The heating is not required at this moment The heat demand is send to the HC60NG as a value between 0 100 The HC60NG will adjust the boiler on time to meet this requirement That is why the heating will be off sometimes even if the symbol is displayed To check if RF system is communicating properly press the button to increase the set temperature a few degrees above ...

Page 14: ...e connection between the boiler and the HC60NG The red LED on the HC60NG is constantly on or lashing RF communication lost due to the wrong location of the thermostat Hook the thermostat back on the wall bracket or replace the thermostat on the table stand in the position where RF communication was reliable RF communication fault Call installer NOTE You can control the boiler manually when the RF ...

Page 15: ...Eficiency 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 a...

Page 16: ...stat back on the wall holder or table stand HC60NG Relay Box Controls Layout What does it mean when the HC60NG 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 Wall bracket Table stand Push button and relay status LED s ...

Page 17: ...now active The factory default program for cooling is speciied in the table below but this can be modiied in the same way as the default heating program period 1 2 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 If something happens to my heating system how can I check that the thermostat is working Refer to the Troubleshooting Guide on page 15 If you still need as...

Page 18: ... 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 ind 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 bes...

Page 19: ...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 low of air to sense the temperature so they must not be covered by curtains or blocked by furniture Nearby electric ires televisions wall or table lamps may prevent the thermostat from working ...

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