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Thread: EvoHome Binding 2 Central Contol Units To one BDR91 Heating Control

  1. #1
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    Question EvoHome Binding 2 Central Contol Units To one BDR91 Heating Control

    Can any one help ? I have 30 Radiators with the old HR80 units on them, this was part of an old CM zone setup. The system has a 28mm zone valve controlling the heating and and a 22mm valve controlling the Hot Water. I now have on BDR91 with the Hot Water Kit operating the 22mm HW valve and on BDR91 operating the 28mm heating valve.

    I have bound the first central control unit to the 9 downstairs radiator zones and the Hot Water Kit, with no Boiler Demand and this is all working ok. I do not see how to configure the second Central Controler to the BDR91 which is controlling the Heating without using the Boiler Demand binding, which I understand is not the correct dinding for a two port s plan system.

    Simple really, can anyone tell me how to bind the second EvoHome Controler to the Heating BDR91, I sure I must be missing something.

  2. #2
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    Quote Originally Posted by Gemsec View Post
    Can any one help ? I have 30 Radiators with the old HR80 units on them, this was part of an old CM zone setup. The system has a 28mm zone valve controlling the heating and and a 22mm valve controlling the Hot Water. I now have on BDR91 with the Hot Water Kit operating the 22mm HW valve and on BDR91 operating the 28mm heating valve.

    I have bound the first central control unit to the 9 downstairs radiator zones and the Hot Water Kit, with no Boiler Demand and this is all working ok. I do not see how to configure the second Central Controler to the BDR91 which is controlling the Heating without using the Boiler Demand binding, which I understand is not the correct dinding for a two port s plan system.

    Simple really, can anyone tell me how to bind the second EvoHome Controler to the Heating BDR91, I sure I must be missing something.
    Hi

    What you have described is classified as a non standard application and your best option is to refer to an evohome specialist

    There are some options and it will be possible to create a system to meet your requirements

    hope this helps
    I work for Resideo, posts are personal and my own views.

  3. #3
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    Quote Originally Posted by Gemsec View Post


    Simple really, can anyone tell me how to bind the second EvoHome Controler to the Heating BDR91, I sure I must be missing something.
    Hi Gemsec, I think you could place another BDR91 bound to the new controller, in parallel with the first. This way, whichever the system could call for heat and open the valve independently and without interfering to one another...

  4. #4
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    Thanks I will give that a try

  5. #5
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    You can actually bind two controllers to one BDR91 without too much difficulty, usually by accident!

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