https://community.viessmann.de/t5/Gas/vitodens-222-W-type-B2LB-opentherm/m-p/56911#M23087 <P>Hi all,</P><P>we recently installed a Vitodens 222-w (type B2LB)&nbsp;and I like to configure it with an existing opentherm thermostat.</P><P>From what I understand this is possible using an Opentherm extention? Is this module A7 and A8 connected to X11 on the pcb? If so i believe my installer should be able to order these modules? what is their productnumber?</P><P>&nbsp;</P><P>any help is more then welcome.&nbsp;</P><P>Thank you.</P> Thu, 25 May 2017 10:10:20 GMT MichVw 2017-05-25T10:10:20Z https://community.viessmann.de/t5/Gas/vitodens-222-W-type-B2LB-opentherm/m-p/56911#M23087 <P>Hi all,</P><P>we recently installed a Vitodens 222-w (type B2LB)&nbsp;and I like to configure it with an existing opentherm thermostat.</P><P>From what I understand this is possible using an Opentherm extention? Is this module A7 and A8 connected to X11 on the pcb? If so i believe my installer should be able to order these modules? what is their productnumber?</P><P>&nbsp;</P><P>any help is more then welcome.&nbsp;</P><P>Thank you.</P> Thu, 25 May 2017 10:10:20 GMT https://community.viessmann.de/t5/Gas/vitodens-222-W-type-B2LB-opentherm/m-p/56911#M23087 MichVw 2017-05-25T10:10:20Z https://community.viessmann.de/t5/Gas/vitodens-222-W-type-B2LB-opentherm/m-p/57022#M23088 Hello MichVw,<BR /> <BR /> you are from Belgium, right? In Germany there is no opentherm for an external thermostat in connection with a B2LB.<BR /> <BR /> Please contact our colleagues in Belgium: info@viessmann.be <BR /> <BR /> Best regards °pa<BR /> Mon, 29 May 2017 09:23:44 GMT https://community.viessmann.de/t5/Gas/vitodens-222-W-type-B2LB-opentherm/m-p/57022#M23088 Patrick_Zarges 2017-05-29T09:23:44Z