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How do I change the batteries on the CM927 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 may 

need to adjust the time and date settings to be correct.

How do I 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   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 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.

fAq’s & TRoublESHooTING

Summary of Contents for CM927

Page 1: ...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 7 day heating program lets you set the CM927 independently for each day of the week to match your lifestyle whilst maximizing energy savings 6 independent temperature levels per day lets you set any 6 temperatures you req...

Page 2: ...t 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 th...

Page 3: ...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 4: ...be 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 first and get progressively 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 COMPLETE Note If the slider switch is moved at any time b...

Page 5: ...e the DAY button to step through each day of the week so the complete 7 day heating program can be reviewed or edited 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 on Monday MON will be flashing The active period is highlighted by a flashing square sy...

Page 6: ...riods are set for Monday or move the slider switch to the AUTO position to run the program as set at any time g After setting period 6 CHANGES SAVED will be displayed as before followed by DAY COMPLETE You now have a choice of how to set the program for the next day h To COPY the Monday s program to another day Press the COPY DAY button to copy Monday s program into Tuesday The display will go bla...

Page 7: ...itch 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 DAY 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...

Page 8: ...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 During Normal Operation Temperature Enquiry In AUTO and MAN operating modes the thermostat will display the current room temperature which is indi...

Page 9: ... 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 confirm the setting e CHANGES SAVED will be displayed for a moment followed by TEMP OK Press the or buttons to set the holiday tempe...

Page 10: ...y the party hours counter and temperature setting along with the party indicator c The text PARTY DURATION will now be displayed on the screen Use the or buttons to set the number of hours 1 23 hours d Press the green button to confirm the setting e CHANGES SAVED will be displayed for a moment followed by TEMP OK Use the or buttons to set the desired temperature 5 C 35 C f Press the green button t...

Page 11: ...e heating program to run for Note The day and date will update according to the number of days selected d Press the green button to confirm the setting e On confirmation CHANGES SAVED will be displayed on the screen for a moment and then will return to the normal display with the days off indicator displayed The thermostat will now control to the alternative heating program for the set number of d...

Page 12: ...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 COPY DAY DAY 1 6 CM927 DATE PROG AUTO...

Page 13: ... 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 flash indicating a change has been made To confirm 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 pref...

Page 14: ... 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 15: ...e connection between the boiler and the HC60NG The red LED on the HC60NG is constantly on or flashing 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 16: ...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 ...

Page 17: ...ostat 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 18: ... cooling is specified in the table below but this can be modified in the same way as the default heating program Monday to Friday 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 Saturday Sunday Period 1 2 3 4 5 6 Time 8 00 10 00 12 00 14 00 18 00 23 00 Temperature 24 C 24 C 24 C 24 C 24 C 24 C If something happens to my heating system how can I c...

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