Opentherm Gateway Voltage levels

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Opentherm Gateway Voltage levels

Postby desatg » Wed Aug 23, 2017 11:13 am

is there a way to obtain adjustable voltage levels on the boiler side (X2)?
Now I measure a low voltage of about 5V and a hign voltage of about 17.5V (when the thermostat connected to X1 is transmitting).
I would like to adjust these values, namely:
_ low voltage should be set between 0V and 8V
_ high voltage should be set between 15V and 18V

Thank you
All the best
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Re: Opentherm Gateway Voltage levels

Postby hvxl » Sat Sep 23, 2017 9:58 am

I don't understand what you are trying to achieve. The voltages you reported already fall within the limits you specify.
But if you want to change the levels, you will have to use different values for D11 (low voltage level) and/or D10 (high voltage level).
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