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Logamatic R2107 - max DHW temp override

psd_3
psd_3 Member Posts: 86
in THE MAIN WALL
Anyone know whether it's poosible to override the max DHW temp of 140F on a Buderus R2107? I would like to set it at ~150F and then temper out of the indirect. Looks like the less capable R2109 provides a manual override, but can't find something similar on the R2107 (model with outdoor reset capability).

Comments

  • S Ebels
    S Ebels Member Posts: 2,322
    None

    Not possible from what I've been told. I wish it could be done also. Call Buderus, If enough of us ask for it maybe it's something they would change. 1-800-283-3787. A lot of commercial applications demand higher temps than what this contro will deliver.
  • psd_3
    psd_3 Member Posts: 86
    ask Buderus

    Just did and got the same answer ... also posted the question on their website as a starting place to gather more user support for this capability.
  • Uni R
    Uni R Member Posts: 663
    The back door...

    The back door approach would be to either change the sensor location or fool the sensor.
  • psd_3
    psd_3 Member Posts: 86
    Buderus Logamatic R2107 -vs- Tekmar 260

    Any strong preferences wrt the these outdoor reset controls for use with a Buderus G115-34? I tend to prefer the R2107 given the level of integration with the boiler and like it's anti-condensate "PUMPLOGIC" feature, as well as it's being independent of heating demand when maintaining an outdoor reset heating curve. I don't like the DHW temp limit of 140F though, which the Tekmar doesn't impose because it uses an independent aquastat for monitoring the DHW indirect. Any other pros/cons I should consider before making a decision?
  • psd_3
    psd_3 Member Posts: 86


    Yes ... can be done with some external resistors, but effects accuracy of control setting and readout as well as fixed differential used for hysterisis. This is a microprocessor based unit and there's gotta be a more "capable" over-ride built in to this thing. I've been told that it's all about product liability (scald potential) as to why Buderus will not support a higher DHW setting. Anyone know what the DHW differential is?
  • Big Ed
    Big Ed Member Posts: 1,117
    Correction

    Installing aquastat and well along with a preference relay would work but will bypass the the 2107 features.... Ahhh ......never mind forgot about boiler temperature...Daaah!


    Seems like your looking for more hot water? Think about ? Sister in a second tank or try installing the booster button off the room sensor?
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