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Vokèra OpenTherm 711 with external sensor connected
Setup guide to using the OpenTherm Control with an external weather compensation sensor fitted. If
you are unsure if an external sensor is fitted check the receiver unit. If the amber LED is lit there is an
external sensor fitted, so continue with this guide. If there is not solid amber LED use the other guide.
flashing amber LED indicates loss of signal between room unit and receiver (check the battery in the
room unit).
When the OpenTherm control is installed it overrides the controls on the boiler fascia. For example the
OT Control will override the heating and hot water temperature settings on the boiler fascia. So your
OT controller is now the means by which you control your heating system and boiler. It also overrides
any other room thermostat or time control previously fitted to the system which may still be connected.
When the OpenTherm Control is connected to your boiler with an external weather compensation
sensor fitted, the room unit operates and displays differently than when no sensor is fitted.
With a weather compensation sensor fitted the room unit will have been programmed by the engineer
with a 'heating curve' set to give you an internal comfort level of 20°C when the weather outside is at
the lowest anticipated temperature for your part of the country.
In use if you find your heating too hot or cold, adjustment is possible to a maximum of 5°C above or
below the default temperature of 20°C.
With a weather compensation sensor fitted the heating gradient to the left of the display shows a pair
of bars.
Note for engineers: The heating curve must be set up on the room unit. Do not set a heating curve on
the boiler by following the instructions in the boiler manual as the OpenTherm control overrides the
boiler settings. The curve is set on the boiler only when an external sensor is fitted without an
OpenTherm.
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Summary of Contents for VOKERA OpenTherm 711
- Page 1 Vokèra OpenTherm 711 with external sensor connected Setup guide to using the OpenTherm Control with an external weather compensation sensor fitted. If you are unsure if an external sensor is fitted check the receiver unit. If the amber LED is lit there is an external sensor fitted, so continue with this guide.
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Page 2: Table Of Contents
Contents: 1. Manual operation of heating system. 2. Ready to go preset heating programme. 3. Setting the time of day on the room unit. 4. Setting the day on the room unit. 5. Setting the heating temperature levels and the times. 6. -
Page 3: Setting The Time Of Day On The Room Unit
1: Manual operation of heating: The room unit has four heating modes, OFF, TIMED, P RTY and HOLID Y. Switch modes by pressing the heating mode selector button OFF - No vertical temperature gradient and radiator icon is shown on the left side of the screen. TIMED - Temperature gradient and radiator symbol on left side of screen (fast adjustment of temperature 5˚C up or down is possible, see section 7). -
Page 4: Setting The Day On The Room Unit
4: Setting the day on the room unit: Press the button Now, press the button twice Seven numbered house icons will now appear Wait until these icons start to flash and then press the button single house icon will now appear containing a day number, for example use 1 if it is Monday Use the button to adjust the day number Now simply press the... -
Page 5: Selecting Heating Modes On The Opentherm Control
Each hour is divided into half hour segments Each segment can be programmed as a comfort, economy or OFF segment blank segment represents an OFF half hour segment with a half bar represents an economy half hour segment with a full bar represents a comfort half hour The number in the house icon represents the day of the week being programmed, for example 1 being a Monday Now, use only... -
Page 6: Resetting The Boiler
The fourth press of the button, will return you to your timed heating programme 7: Fast adjustment of the room temperature on the OpenTherm Control: The room temperature level can be adjusted temporarily at any time, and it will revert back to your programmed temperature level at the next change i.e. - Page 7 If the mber LED on the receiver is flashing radio contact between the room unit and the receiver has been lost (it is therefore worth checking the battery indicator on the room unit). solid red LED is not a fault indication, it simply indicates the unit is powered on. solid amber LED indicates there is an external sensor fitted.
- Page 8 Press the button P SS will appear and flash in the screen and the display shows 00 Press and hold the button until the 00 reads 53 53 is the password to enter parameter mode Press the button Press the button to scroll through the parameters.
- Page 9 22: Unused 23: Unused 24: Unused 26: Use the buttons to swap between the display of the actual boiler flue temperature and the number of hours in condensing mode the boiler has operated x100. (2500 hours signals the need for a full service - 09 will be displayed on the room unit although the boiler will continue to operate as normal).
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