iQe CS027 User Instructions
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iQe CS027 User Instructions

Battery powered 7 day programmable room thermostat
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CS027

User Instructions

Battery Powered 7 Day Programmable
Room Thermostat
Programmable room thermostats are widely recognised as one
of the best ways in which to control central heating. The CS027
programmable room thermostat has a large display and intuitive
user interface, making it easy to set up and use. The CS027
uses a sophisticated time proportional integral (TPI) algorithm
for accurate temperature control and energy efficiency.
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  • Page 1: User Instructions

    Room Thermostat Programmable room thermostats are widely recognised as one of the best ways in which to control central heating. The CS027 programmable room thermostat has a large display and intuitive user interface, making it easy to set up and use. The CS027 uses a sophisticated time proportional integral (TPI) algorithm for accurate temperature control and energy efficiency.

  • Page 2: What Is A Programmable Room Thermostat

    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 the set temperature has been reached.
  • Page 3 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.
  • Page 4 CS027 DISPLAY Actual Room Day of Time of Temperature Week Until (Time) Then (Temp) Temperature Back - Button + Button Enter Button Button...
  • Page 5 Actual Room Temperature This is the actual room temperature measured by the CS027 Set Temperature This is the temperature that the CS027 will allow the room to reach. The temperature range can be set between 5°C and 30°C When the temperature shown in the display is achieved the CS027 will switch the heating OFF.

  • Page 6: Temporary Override

    TEMPORARY OVERRIDE A temporary temperature change can be made at any time. It is also possible to extend how long this temperature override is in operation. Press ‘-’ or ‘+’ to New temperature adjust temperature setting will be shown on the display The temperature will revert to its normal programmed setting at the next timed temperature change TEMPORARY OVERRIDE WITH TIME EXTENSION...

  • Page 7: Permanent Override

    PERMANENT OVERRIDE New temperature Press ENTER Press ‘-’ or ‘+’ to setting will be adjust temperature shown on the display Press the '+' The hours of Press ENTER repeatedly until the UNTIL time HOLD appears in will flash the display Message will appear briefly confirming...
  • Page 8 SETTING UP THE CS027 Upon initial installation the CS027 has the following factory default settings Settings – Monday to Friday Time Target Temperature Period 1 06:00 am 20 °C Period 2 08:30 am 18 °C Period 3 11:30 am 20 °C...
  • Page 9 Up to six different temperature levels can be set in any 24 hour period Standby This puts the CS027 into Frost protection or Standby condition and allows the heating to be permanently switched off but will activate and switch the heating on if the temperature in the house falls below the standby temperature set.
  • Page 10 Setting the PROGRAMME Six time and temperature settings are available in each 24 hour period. Pressing BACK at any time in this process will return you to normal operating mode. Press '-' or '+' Press ENTER three The day of the week to select day to times will flash...
  • Page 11 To copy the same programmes to other days of the week, please follow the process below When you have set The next Press ENTER sequential day P6 the message 'To Copy press ENTER' will now flash. will appear. Press '-' or '+' to select the When complete press BACK days you wish to copy the to return to normal operating...
  • Page 12 Setting the HOLIDAY programme Pressing BACK at any time in this process will return you to normal operating mode Press '-' or '+' until Press ENTER twice HOLIDAY appears Press ENTER on the display Press the '-' or '+' to adjust to the date you The START date The BACK date...
  • Page 13 If the holiday period START date matches today's date, the STANDBY temperature will be shown on the display together with the suitcase icon. If the holiday period START date does not match today's date the display will remain in normal operating mode but with the suitcase icon appearing on the right of the display.
  • Page 14 Setting the TIME and DATE Pressing BACK at any time in this process will return you to normal operating mode Press '-' or '+' until Press ENTER twice Time/Date appears Press ENTER on the display Press '-' or '+' to The hours for The minutes for adjust hours then...

  • Page 15: Setup Menu

    This is the adjustment made in the UK when the clocks go back or forward in the Autumn and Spring. When using the CS027 in the UK the daylight saving ON setting should be selected which will automatically adjust the...
  • Page 16 Optimum start This calculates the amount of time the CS027 may need to switch on in advance of the next target temperature setting in order to meet the requirement. Tamper setting...
  • Page 17 Select the DAYLIGHT SAVING Pressing BACK at any time in this process will return you to normal operating mode The default factory setting is for the Daylight saving to be ON giving automatic switching to GMT/BST Press '-' or '+' until Set Up appears on Press ENTER twice Press ENTER...
  • Page 18 Setting the STANDBY TEMPERATURE, LOWER TEMPERATURE LIMIT or UPPER TEMPERATURE LIMIT Pressing BACK at any time in this process will return you to normal operating mode Press '-' or '+' until Press ENTER twice Set Up appears on Press ENTER the display The temperature Press '-' or '+' until...
  • Page 19 Setting the TPI cycles Pressing the BACK at any time in this process will return you to normal operating mode Press '-' or '+' until Set Up appears on Press ENTER Press ENTER twice the display Press '-' or '+' until The current setting TPI Cycles per hour Press ENTER...
  • Page 20 Setting the OPTIMUM START This setting will allow the CS027 to anticipate the next set temperature and switch on up to two hours in advance to ensure room temperature has been reached by the time the new set temperature applies.
  • Page 21 Setting the TAMPER SETTING This setting allows the unit to be locked to the programmes set and can only be reactivated by entering the pin code. None of the buttons will operate until the security code is entered Pressing BACK at any time in this process will return you to normal operating mode Press '-' or '+' until Set Up appears on...
  • Page 22 Cancelling the TAMPER SETTING Pressing BACK at any time in this process will return you to normal operating mode The following message will Press ENTER Press ENTER twice appear 'To enter release code press ENTER' The following Repeat the Press '-' or '+' to previous step for confirm the first message will appear...
  • Page 23 Electronic equipment can in some circumstances be affected by electrical interference. If the display becomes frozen or scrambled simply press both the BACK and ENTER button simultaneously. Using this proceure will restore the CS027 to the original factory settings, the Time and Date will remain correct. BACK ENTER...

  • Page 24: Service And Repair

    This programmer is NOT user serviceable. Please do not dismantle the unit. In the unlikely event of a fault developing please refer to the RESETTING THE CS027 on page 23. If this fails to resolve the problem please contact a local heating engineer or a qualified electrician.

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