Recent content by joesparks

  1. J

    siemens rdj10rf wiring to grant vortex pro external combi

    the stat often takes the place of a factory fitted link in the boiler and all the stat does is replace this short link (that is constantly closed and so making a circuit) with a longer link that opens on reaching set temp and closes to fire up the boiler (call for heat). use L1 and LX. Best to...
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