y plan boiler swap

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      K Williams

      just wanted to know if i could change an old glow worm conventional boiler running on a y-plan to a worchester bosch greenstar IR with out changing any wiring.

      all controlls are present and working

      room stat

      cylinder stat

      timer

      pump

      3 port

      frost stat (boiler in garage)

      i install day in day out but dont get to see the wiring up,i just leave on temp 3 pin plug with the valves in manual

      my bets are its like for like going off the diagram i saw, but dont want to price the job befor i find out if i need the spark in or not?

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