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  1. If you use Viessmann with Opentherm make sure...

    If you use Viessmann with Opentherm make sure that Viessmann can supply and support the whole system, I'm using a Viessmann with Opentherm and Honeywell Evohome and they don't play well together. I...
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    Paul I have used Raspberry Pi's and they are...

    Paul
    I have used Raspberry Pi's and they are reliable if you use a RPI3 with USB memory instead of SD card.

    Michael
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    This may help which says A maximum of four...

    This may help which says A maximum of four evohome controllers can be bound to one R8810A OpenTherm Bridge. ...
  4. With a 60Kw system I would go for 2*30Kw and load...

    With a 60Kw system I would go for 2*30Kw and load sharing. Apart from deep winter you will find that the demand is below 30Kw so only need 1 boiler firing. Viessmann have a load sharing system and...
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    I read somewhere, can't remember where, that the...

    I read somewhere, can't remember where, that the opentherm gateway http://otgw.tclcode.com/ helps with control of the Viessmann.

    Michael
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    Instead of using eBus why not use one of your...

    Instead of using eBus why not use one of your Pi's with a couple of DS18B20 Digital Thermometers attached to the flow and return pipes. It should be cheaper and save any Gas Safe problems.

    Michael
  7. Working OK here

    Working OK here
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    I think that the unused rooms should be kept at 1...

    I think that the unused rooms should be kept at 1 deg above dew point so that the structure stays dry.
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    if you look at the HR92-Installation-Guide.pdf at...

    if you look at the HR92-Installation-Guide.pdf at http://www.honeywelluk.com/products/Systems/Zoned/HR92-Radiator-Controller/ on page 7 it shows using a cable ACS90 to connect the external window...
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    What are the pro's and con's of using a USB power...

    What are the pro's and con's of using a USB power supply to power the HR92 instead of batteries?

    One disadvantage of using cheap batteries is leakage wrecking the TRV head, I bought some B&Q...
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    I'm on iOS 11.4.1 and had to remove/re-install...

    I'm on iOS 11.4.1 and had to remove/re-install the app as the app started and terminated in seconds. Fixed with re-install.
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    Wanted Honeywell HGI80

    Has anybody got a Honeywell HGI80 needing a new home?
    Thanks

    Michael
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    Jabes Where did you get your HGI80 from? Thanks...

    Jabes
    Where did you get your HGI80 from?
    Thanks

    Michael
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