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  1. K

    Replace PRT2 thermostat with REV23

    Hi all I'm trying to replace my PRT2 stat with a Siemens REV23, but the wiring diagram has thrown me slightly. (I'm no electrician/plumber, but I'm smart enough to not zap myself...I just don't want to zap my new controller) The PRT2 has the following connections : 2 3 4 5 Com H...
  2. K

    Digital replacement for PRT2 thermostat

    Hi Hope this is the right forum for this question. My PRT2 room thermostat is acting up on me and I'm looking to replace it with a new digital (possibly programmable) one. Now, I've done a search of the net, but with the usual deluge of options, I'm lost as to which one would be...
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