Image is for illustration only and should not be relied upon EPH CP4B OpenTherm Wired Programmable Thermostat
EPH CP4B OpenTherm Wired Programmable Thermostat

EPH CP4B OpenTherm Wired Programmable Thermostat

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£38.39
Ex VAT: £31.99
Brand:
HCO Code: 08B15
Availability:  In Stock

This battery operated digital programmable room thermostat is suitable for controlling a heating zone. It features OpenTherm®, Optimum Start, TPI and On/Off control modes.

  • Boiler Plus Compliant.
  • Keypad lock
  • Temporary Override
  • Permanent Override
  • Boost Function
  • Holiday Function
  • Backlight mode selection
  • Battery low warning
  • High & Low Temperature Limits
  • Frost Protection


Temp. control range: 5 … 35˚C
Contact rating: 8A 230Va
Dimensions: 130 x 99 x 25mm
Switching differential: 0.4˚C

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  • No this is a wired thermostat.  It is not wireless.

  • As you say you lost it, it sounds like you had the wireless one.  This is the wired one, so is not suitable.  You need the CP4v2.

  • Access the Buttons: Lower the flap on the front of the thermostat to reveal the programming buttons.

    Enter Time/Date Mode: Press the TIME button once. The year (e.g., '2025') will begin to flash.

    Cycle Through Settings: You will need to press the OK button multiple times to cycle past the time and date settings.

    Press OK to confirm the year.

    Press OK to confirm the month.

    Press OK to confirm the day.

    Press OK to confirm the hour.

    Press OK to confirm the minute.

    Adjust Program Mode (if needed): After the minutes, you will see the program mode (e.g., '5/2d', '7d'). Press OK one more time to get to the DST setting.

    Change DST Setting: The screen will now show 'DST' and either 'On' or 'Off' will be flashing.

    Use the '+' or '-' buttons (or the up/down arrows) to toggle this setting to the one you need.

    Confirm and Exit: Press the OK button to save your selection. The thermostat will then return to its normal operation screen after a few seconds, or you can press the AUTO button to exit immediately.

    Your thermostat will now be set correctly for the new time.
  • It takes 2 x AA batteries.
  • Press the PROG button once.
    Programming for day or block of days is now selected.
    Press the + or - buttons to adjust the P1 time. Press OK .
    Press the + or - buttons to adjust the P1 temperature. Press OK .
    Repeat this process to adjust P2 to P6 times and temperatures. Press OK .
    Programming for the next day or block of days is now selected.
    Press the + or - buttons to adjust the P1 time. Press OK .
    Press the + or - buttons to adjust the P1 temperature. Press OK .
    Repeat this process to adjust P2 to P6 times and temperatures.
    Press the AUTO button to return to the automatic mode.

    While in PROG Mode pressing the PROG button will jump from P1-P2 etc without changing the temperature.

    While in PROG Mode pressing the TIME button will jump to the next day or block of days.
  • Open the front flap, then slide the battery cover off.
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