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  1. Thread: X-Plan

    by kevinsmart
    Replies
    10
    Views
    724

    Ideally Evohome would allow you to set different...

    Ideally Evohome would allow you to set different max CH and DHW OpenTherm temperatures, but unfortunately it doesn’t. And with some boilers the default 80C or 90C is too high.
  2. Thread: X-Plan

    by kevinsmart
    Replies
    10
    Views
    724

    Sure, if you are happy with the same max flow...

    Sure, if you are happy with the same max flow temperature and boiler settings for both DHW and CH.

    In my weather compensation setup, I disconnect the outside temperature sensor on DHW heating,...
  3. Replies
    6
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    721

    There is a nice description by DBMandrake here: ...

    There is a nice description by DBMandrake here:

    https://www.automatedhome.co.uk/vbulletin/showthread.php?6134-Evohome-firmware-02-00-19-31-Beta-Trial-Exclusive-for-Automated-Home-Members/page63
  4. Thread: X-Plan

    by kevinsmart
    Replies
    10
    Views
    724

    Evohome support of DHW priority has only just...

    Evohome support of DHW priority has only just been added to its firmware. Previously if you had CH and DHW valves you would wire them to the DHW BDR91 such CH closes when DHW opens.

    I’m not sure...
  5. Thread: X-Plan

    by kevinsmart
    Replies
    10
    Views
    724

    Because default operation is OpenTherm heating...

    Because default operation is OpenTherm heating with only HR91/2s controlling flow to radiators.

    When there is a demand to heat the DHW cylinder you don’t want 70C flow in your CH circuit leading...
  6. Thread: X-Plan

    by kevinsmart
    Replies
    10
    Views
    724

    Basically the CH 2-port is Normally Open and the...

    Basically the CH 2-port is Normally Open and the DHW valve Normally Closed.

    When there is a Priority DHW demand the CH valve is closed and DHW opens, so all flow is to the cylinder.

    With...
  7. Thread: X-Plan

    by kevinsmart
    Replies
    10
    Views
    724

    https://www.intergasheating.co.uk/app/uploads/2019...

    https://www.intergasheating.co.uk/app/uploads/2019/11/X-Plan-diagram-Rapid-HRE-Eco-RF-low-voltage-option-V1.pdf
    ...
  8. As I understand it, this parameter sets the...

    As I understand it, this parameter sets the closed to open, 0-100% (90 degrees) actuator time.

    What do you observe when there is a 100% demand, how long does it take to open the valve?
  9. Yes, looks like a bug, but does the default 150s...

    Yes, looks like a bug, but does the default 150s not work for you, why do you want to change it?
  10. Thinking back to how I set my HM80 up, Bruce. It...

    Thinking back to how I set my HM80 up, Bruce. It was on the older firmware and at that time after configuring the parameters, you needed to change the heating type from MIXING VALVE to ZONE VALVES,...
  11. Replies
    7
    Views
    661

    If there is no heating demand 0% then the boiler...

    If there is no heating demand 0% then the boiler won’t fire and the radiator valves won’t open.

    Try setting zone(s) 2C above the current temperature reading to test whether they heat up.
  12. Replies
    7
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    661

    What zone heating demands do you see in the...

    What zone heating demands do you see in the Installer menu (long press Settings)?
  13. Replies
    69
    Views
    12,041

    Not now, I moved house and predominantly have...

    Not now, I moved house and predominantly have HCE80s now. It was working fine with the latest firmware as far as I recall but I was just using the default run time setting, I only changed the max...
  14. 1 is L red 2 is N blue 3 is switched L to...

    1 is L red
    2 is N blue
    3 is switched L to boiler yellow

    BDR91:
    Connect L and N
    Bridge L to A
    B to boiler yellow
  15. Fit boiler control, it will be inefficient...

    Fit boiler control, it will be inefficient otherwise, with the boiler cycling when TRVs are closed.
  16. It is a supported configuration for large rooms. ...

    It is a supported configuration for large rooms.

    I edited my post above with instructions on how to do it.
  17. I encountered this situation. All you need to do...

    I encountered this situation. All you need to do is to use two zones on the HCC80, one with 3 actuators, the next with 2 and bind them to the same room zone/thermostat in Evohome. They will...
  18. Replies
    6
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    624

    I found BDR91 relays to be noisy, and with TPI...

    I found BDR91 relays to be noisy, and with TPI annoying if installed in a living area.

    The HCE80 has more intelligence around pump control, with overrun, and quiet actuator control (solid...
  19. Replies
    69
    Views
    12,041

    You should see better zone temperature control...

    You should see better zone temperature control with the HM80, if that was previously a problem for you?
  20. 1837183818391840 Individual zone demands are...

    1837183818391840

    Individual zone demands are between 0 to 100% with the maximum demand sent to the OpenTherm bridge.
  21. I’ve got HCE80s with external antennas and see...

    I’ve got HCE80s with external antennas and see individual zone demands on the controllers
  22. It might not solve it but it will at least allow...

    It might not solve it but it will at least allow us to debug more easily, by seeing the zone demand percentages
  23. Contact customer support:...

    Contact customer support: consumersupportuk@resideo.com
    Provide this info:

    MAC ID and CRC code of the Evohome.

    The MAC address and CRC code of the evohome controller can be found in the...
  24. What firmware version are you running? Press...

    What firmware version are you running? Press SETTINGS. Keep the DEVICE SETTINGS button pressed until SYSTEM INFORMATION is displayed. Latest is 02.00.19.33
  25. Looks like you don’t have a boiler relay...

    Looks like you don’t have a boiler relay configured?

    You should see an Appliance entry for the BDR91 or OpenTherm boiler control.

    How is your system wired?
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