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  1. Replies
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    Heating Off just does as it says, Heating Off. It...

    Heating Off just does as it says, Heating Off. It doesn't turn the HW schedule off, so if you are away it isn't useful unless you want a tank full of HW at home! :p

    But yes I agree, 5oc isn't high...
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    Without getting off topic I find 5oc is too cold,...

    Without getting off topic I find 5oc is too cold, i've adjusted my Away mode to 11oc - I find it a happy medium between it keeping the house aired and not coming on too often.

    Useful to know...
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    Laughably I've just had a Comms error after being...

    Laughably I've just had a Comms error after being away for 9 days. Turned system back on before we were heading home, glanced at the App to find our HW at 66oc! On return looking at the log there was...
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    You need 3 BDR91s to do what you require, or...

    You need 3 BDR91s to do what you require, or donít use one of the BDR91s as a boiler relay and use it just as a trigger for the CH MV and use the SL from the MV to fire the boiler.
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    Out of interest, have you tried rebooting the...

    Out of interest, have you tried rebooting the controller since the new batteries were fitted.
  6. I guess from an end users point of view you'd go...

    I guess from an end users point of view you'd go back to your Honeywell Accredited installer (I know, means naff all! :rolleyes:).

    From an installers point of view;

    In HenGus case, it probably...
  7. Replies
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    Have you ever considered it could be the physical...

    Have you ever considered it could be the physical sensor thatís causing the issue (the bit that straps to the tank) resistance dropping out causing the CS92A not to behave

    My system I use the...
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    Think mine is 55oc with a dif of 7oc with a 2 min...

    Think mine is 55oc with a dif of 7oc with a 2 min overrun. Usually ends up at 56/57then. Think the default is 55 not 60.

    I was going suggest have you tried putting the Panel on its stand and...
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    Well...I don't always use them in all the CS92As...

    Well...I don't always use them in all the CS92As I fit. The main issue being is our suppliers don't always have them - and cost. I've bulk bought a load online for the systems we maintain and fit.
    ...
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    I've always used Lithium ones and not had any...

    I've always used Lithium ones and not had any issues, perhaps that's the cure? I try and use Lithium ones in all the HR92s too.
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    It's a combi, so there should be no motorised...

    It's a combi, so there should be no motorised valves as the system isn't zoned as far as i'm aware.
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    No, I meant you can close the internal bypass...

    No, I meant you can close the internal bypass completely. Think you misunderstood.
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    Yeah with small/undersized rad sizes you need to...

    Yeah with small/undersized rad sizes you need to be ideally running it at 75oc. You're possibly having the opposite effect running at lower temperatures - as the boiler not meeting/maintain set...
  14. Have you considered just heating the whole house?...

    Have you considered just heating the whole house? If it's well insulated ours uses less gas than having set times on, using EvoHome. Even though we are out at work all day I have on from the morning...
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    Yes so it's basically behaved really as I...

    Yes so it's basically behaved really as I expected - part of the issue is your restricted flow when you've balanced them down. I'd expect the boiler turn the boiler on and off as you describe.


    ...
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    Funnily enough I had mine set on 10 and found it...

    Funnily enough I had mine set on 10 and found it didn't update quick enough when drawing off. However changing to 7oc with a 2 min overrun seemed to be a sweet spot. Does it update more regularly...
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    Out of interest, what's you differential setting...

    Out of interest, what's you differential setting on?
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    No matter what you'll still have the same issue -...

    No matter what you'll still have the same issue - a Green IQ Vaillant will modulate 1:10, but that still will only modulate to 3.5kw Which is more than just one rad running at once.

    Have you...
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    The place i'd start is open all your lockshields...

    The place i'd start is open all your lockshields full. Put pump into 100% mode and close the bypass some so it's 3/4 closed. Set flow temp at 70oc. Run the system from cold and see if all the rads...
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    Put it in 100%, and close the bypass some more....

    Put it in 100%, and close the bypass some more. Not all the way shut but just open enough - get your installer to do this for you. You can't as it means removing the front of the boiler and you can't...
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    The pump probably want's adjusting and the...

    The pump probably want's adjusting and the internal bypass adjusting too, have you got an external bypass?

    How quick does the anti cycle kick in when the Partial Load is set to Auto? Anti Cycling...
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    Does it do S.53? How old is the boiler; there's...

    Does it do S.53? How old is the boiler; there's probably another issue at play rather than the Output being too large. It's a 38kw boiler but it'll do only 30kw on heating, within that it'll modulate...
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    The solution to your overshooting would be to...

    The solution to your overshooting would be to wire your Cylinder Stat back in series with the BDR91 and set it at 60oc.

    Has replacing the batteries resolved your issue? As you've said the battery...
  24. The HR91s will compensate for the radiator so...

    The HR91s will compensate for the radiator so will show less.

    The Main Panel is over due to the heat from the panel. I've had to offset mine -1.5oc because of this to get a true reading.

    My...
  25. Are your HR91s actually fitted to any radiators...

    Are your HR91s actually fitted to any radiators yet?
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