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  1. Don't forget if you are using the HW kit with an...

    Don't forget if you are using the HW kit with an Unvented cylinder you need to leave the Hi Limit Stat wired in series with the BDR91 to comply with regs.
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    Yes on larger systems sometimes it isn't worth...

    Yes on larger systems sometimes it isn't worth fitting a System boiler as you have to start adding extra expansion vessels on, larger pumps anyway. However the system boilers are roughly the same...
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    On another note, if you have a 4 bed house, have...

    On another note, if you have a 4 bed house, have 2 or more bathrooms and want to run two showers at once ideally you should be looking at a System Boiler and Unvented Cylinder. A combi will never be...
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    Quite right, I was referring to a system boiler...

    Quite right, I was referring to a system boiler we fitted with an Unvented cylinder. Combis are a different matter - and you'll find on a combi it has two different outputs for HW and CH.
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    Biggest problem with most installers - put a...

    Biggest problem with most installers - put a biggest boiler in they can, resulting in upgrading the gas main when in reality most properties don't need it and would be more than adequate running a 15...
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    38Kw is huge for a heat only boiler really, do...

    38Kw is huge for a heat only boiler really, do you live in a mansion? :D

    I seem to recall you saying it was drastically oversized in the past....
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    Yes which I believe the OP is.

    Yes which I believe the OP is.
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    My parents runs this way, they have two boilers...

    My parents runs this way, they have two boilers that heat different parts of the system and one control system (Evohome) so I had to get a way round it and using the Electric option worked well.
    ...
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    Yeah set it to Electric Underfloor. It'll not...

    Yeah set it to Electric Underfloor. It'll not fire the Heating Relay then.
  10. Done many systems UFH systems with BDR91s and...

    Done many systems UFH systems with BDR91s and T87RFs paired up to the EvoHome panel and they work fine as a TPI zone. You either need a 4 wire actuator or a wiring centre of the underfloor. 4 Wire...
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    Ive used Evohome as a solution where it hasnít...

    Ive used Evohome as a solution where it hasnít been possible to get a wire to a cylinder cupboard with no power or easy route back to the boiler. Having said that it was probably easy to get a 240v...
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    I have HW priority on my system and it works...

    I have HW priority on my system and it works really well. Tbh any larger system it's well worth while IMO whether you've got adapting flow temps or not. You have to take into account the KW rating of...
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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.
  18. 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...
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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...
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