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Loxone integration with Vaillant boiler

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  • Loxone integration with Vaillant boiler

    Hi all,

    Since the beginning of my installation with a loxone partner I didn't had the feeling it was all setup very well and fine tuned. Everything worked, so don't fix it if it ain't broken, right?
    Recently I had some spare time and wanted to expand my knowledge about Loxone. By looking to the loxone foundation series I did gather some good information and made some adjustments to my house.
    The only thing that was left that I couldn't figure out is the heating installation. We have installed a brand new ecotec exclusive vcw 436 Vaillant with a pump for our radiators upstairs and one for the underfloor-heating downstairs. On both the radiator and underfloor-heating collectors we use the Loxone actuators.
    Currently the only connection between loxone and Vaillant is with the VR70 module. If I'm correct this is just a simple on/off heating solution. S2 controls the radiators, S3 controls the underfloor-heating. In the Vaillant module I disabled most of the features like the outside temperature sensor and indoor sensors.
    In the config the only thing I have is the following:

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    as shown in the foundation series you can add some additional blocks to have the full 3 or 4 stages to control the heating. What I don't understand is how you manage to get the wiring (Vaillant, mixer,..) to all these components and how the Vaillant should be configured. Does anyone have some insight in this? Does it actually benefit you? Or what are the recommendations for this? I looked at the technical wiring for the boiler and other components but cannot figure it out.
    I raised this question at the loxone installer but he forwarded me to the vaillant installer and vice versa. I assume none of them has experience with this.
    Recently I also did found a loxone blog where they mentioned an integration with the eebus but I think it's only for the heat pumps from Vaillant. However I followed the tutorial and I did manage to get it connected. It does tell me it's a vr920 which is not correct but it still show connected both in the vaillant app and in the loxone config. I have no clue if I can use it in any way now.
    I hope someone can help me out or give some advice on my next steps!

    thanks in advance!

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  • #2
    For me, i completely control my vaillant heating installation on gas using a vr34 module. There is not much advertising on this module and i was not sure if it would work but it works perfectly. This module was created to use the vaillant system in bigger buildings. This module reacts to the analogue 0-10 volt signal from a master building management system (here the miniserver) to determine how much power/heat the vaillant heater needs to provide. The heating block from loxone (dont remember the name) automatically calculates the necessary heating requirements (and thereby the 0-10 voltage) based on the intelligent room controllers of all the different rooms.the intelligent room controllers than indeed control the loxone actuators so the heat is only provided to the rooms that need heat.
    Zuletzt geändert von ty5500; 21.Aug.2021, 20:32.

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    • cdrescher
      cdrescher kommentierte
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      That sounds pretty interesting with the VR34 module. I was so far as well controlling my vaillant with the on/off via loxone. but I read that this causes too often on/offs which are eventually not good as it cannot control the heat as good.
      @ty5500: can you evtl. share your config? From the wiring I assume I just use an analog output 0-10V and connect it to the vr34 which is connected to the vaillant heating installation, right?

  • #3
    I've added a printscreen of the main elements of my configuration. every room has its own intelligent room controller with a linked temperature sensor. All these intelligent room controllers are assigned to the intelligent temperature controller. The intelligent temperature controller is the main element that communicates with the vaillant heater and which decides how much power the vaillaint heater needs to provide based on the requirements of all the rooms (all the linked intelligent room controllers). If all the rooms need heating and the temperature difference is high, a 10v signal will be provided on output AQI so the heater works on max capacity. If only one room needs little heating a low signal is transmitted. For this to work correctly and comfortably, you also need to enter the sizes in square meters of all the rooms in loxone in the rooms section.On the H output of the intelligent room controller, the actuators are linked which are on my collectors.

    The wiring is that indeed the analog 0-10v output to the vr34 module and of course the wiring to the actuators.
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    • #4
      Zitat von ty5500 Beitrag anzeigen
      I've added a printscreen of the main elements of my configuration. every room has its own intelligent room controller with a linked temperature sensor. All these intelligent room controllers are assigned to the intelligent temperature controller. The intelligent temperature controller is the main element that communicates with the vaillant heater and which decides how much power the vaillaint heater needs to provide based on the requirements of all the rooms (all the linked intelligent room controllers). If all the rooms need heating and the temperature difference is high, a 10v signal will be provided on output AQI so the heater works on max capacity. If only one room needs little heating a low signal is transmitted. For this to work correctly and comfortably, you also need to enter the sizes in square meters of all the rooms in loxone in the rooms section.On the H output of the intelligent room controller, the actuators are linked which are on my collectors.

      The wiring is that indeed the analog 0-10v output to the vr34 module and of course the wiring to the actuators.
      Thanks for the info! I did some lookup on the vr34 module and indeed there is not much to find about. I did notice it should be compatible with my gas installation but haven't seen yet how to install it properly. On the miniserver side you mentioned the analog output AQI, since I own a miniserver (not gen1) I assume I will need an additional extension. Is there also an analog input required from the module to the miniserver for reading any parameters?
      Do you also control any mixing valves perhaps? Or do you only use 1 heating system (radiators, underfloor-heating) for the whole house?

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      • #5
        Zitat von Asalways Beitrag anzeigen

        Thanks for the info! I did some lookup on the vr34 module and indeed there is not much to find about. I did notice it should be compatible with my gas installation but haven't seen yet how to install it properly. On the miniserver side you mentioned the analog output AQI, since I own a miniserver (not gen1) I assume I will need an additional extension. Is there also an analog input required from the module to the miniserver for reading any parameters?
        Do you also control any mixing valves perhaps? Or do you only use 1 heating system (radiators, underfloor-heating) for the whole house?
        More information regarding the manual and installation can be found in the online manual (https://www.vaillant.be/telechargements/documents/notice-installation/controls/notice-dinstallation-vr-34-0-10-v-316544.pdf). I don't remember the installation so it definately was very easy and straightforward. I control with this module the gas installation via an analog output on the miniserver (gen 1).

        I'm not sure what mixing valves are. I have collectors and on these collectors are actuators from loxone (https://shop.loxone.com/enen/valve-actuator-tree.html) that control the flow to all my radiators individually and that are connected to the loxone three module. They are controlled by the H output in my printscreen above. I don't have any feedback back from my gas installation to loxone (it apparently is possible if i read again about the vr34 but back than i did not do it).
        Zuletzt geändert von ty5500; 26.Aug.2021, 20:59.

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