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  • dty's Avatar
    Yesterday, 11:52 PM
    Yes, because the boiler only has 230 mbar (about 2.3m) of remaining feed head and that's not enough. My secondary pump displays its working head and...
    8 replies | 160 view(s)
  • dty's Avatar
    Yesterday, 10:18 PM
    Correct. No CH valve. But I'm using a BDR bound as a CH valve controller to fire the secondary pump together with the orange wire from the DHW valve....
    8 replies | 160 view(s)
  • dty's Avatar
    Yesterday, 08:50 PM
    Because when the boiler pump is on overrun the secondary side will be deadheaded. I suspect the answer is to do exactly what you're suggesting and...
    8 replies | 160 view(s)
  • dty's Avatar
    25th May 2017, 08:32 PM
    Hello all, I have Evohome installed on a large system (24 rads). The system has a DHW valve but no CH valve. It's not possible to add a CH valve...
    8 replies | 160 view(s)
  • dty's Avatar
    22nd May 2017, 12:47 PM
    dty replied to a thread HR92s unscrewing in Heating Control
    I've had Valencias exclusively for about 3 months and I've not noticed any issues. My installer did do them up very tight!
    5 replies | 252 view(s)
  • dty's Avatar
    22nd May 2017, 12:05 PM
    dty replied to a thread HR92s unscrewing in Heating Control
    That presumably means the whole screw on adaptor bit (the black disc) AND the head itself are turning? You'd surely notice the head moving?
    5 replies | 252 view(s)
  • dty's Avatar
    12th May 2017, 09:03 AM
    dty replied to a thread Evohome - please help! in Heating Control
    If you don't have a BDR controlling your boiler, then the boiler is presumably controlled using the traditional orange wire from the microswitches in...
    20 replies | 1050 view(s)
  • dty's Avatar
    4th May 2017, 03:34 PM
    dty replied to a thread Boilers, BDRs and TPI in Heating Control
    So now I've been using Dan's development code, I can see much more clearly when Evohome is asking for the boiler to be on. This has, however,...
    13 replies | 1013 view(s)
  • dty's Avatar
    4th May 2017, 03:23 PM
    dty replied to a thread Boilers, BDRs and TPI in Heating Control
    I have two DTS92s due to arrive today (if I'm lucky!). One is not urgently needed, so I'll send it to Dan to use for testing purposes for a few weeks...
    13 replies | 1013 view(s)
  • dty's Avatar
    2nd May 2017, 10:20 PM
    dty replied to a thread Boilers, BDRs and TPI in Heating Control
    Excellent work, Dan! :-)
    13 replies | 1013 view(s)
  • dty's Avatar
    28th April 2017, 11:52 AM
    That would imply that Evohome is happy to work on that basis, however, and would remove an assumption (i.e. the possible requested temperature range)
    117 replies | 6653 view(s)
  • dty's Avatar
    28th April 2017, 10:48 AM
    Scaling would be the least confusing to the Evohome algorithms, I suspect. It would expect a different result when it asked for 90% load vs 100% load...
    117 replies | 6653 view(s)
  • dty's Avatar
    27th April 2017, 07:22 PM
    Something is awry with either my setup, or the accepted wisdom of how this stuff works. (Or maybe we just haven't reverse-engineered the protocol...
    13 replies | 1013 view(s)
  • dty's Avatar
    27th April 2017, 07:03 PM
    Two HR92s and a Y87RF. When I said "allowed to get cold", what I meant was "something else isn't right but I don't think it's relevant to what I'm...
    117 replies | 6653 view(s)
  • dty's Avatar
    27th April 2017, 06:29 PM
    I was going to write a separate post about this, and probably still will... but since you brought it up... I have a room which had been allowed to...
    117 replies | 6653 view(s)
  • dty's Avatar
    27th April 2017, 03:08 PM
    The interesting thing here will be whether the OT bridge is just a relatively dumb protocol converter (i.e. radio <-> OT) and the brains of the...
    117 replies | 6653 view(s)
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