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Simon Thanks for advice - so assuming I keep all the controls except the Delta - how would I go about wiring the pumps, stats - room stat HW etc., to a new programmer ? I sort of get that the difference here would only be the programmer - so is there anywhere I could get an idiots guide to...

Hello everyone - I'm a newbie here, and have a long standing pain in the proverbial .... that I would REALLY like to sort out! Bit long winded - but here goes. Got worcester bosch greenstar 30cdi system condensing boiler, UFH to all floors - with one "dump it" radiator in porch, 9 port manifold...