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- 19 Nov 2021
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Currently have a horstmann h27xl programmer for our heating/water but it’s seems to have failed today as it won’t fire the boiler when pressed for hot water…. Was looking at a replacement programmer the Drayton 522 or 722, but I’ve noticed the back plate are different, the horstman is numbered 1-6 (but 3 and 6 empty)but the Drayton is only 1-4 …. Could someone advise me if I was to buy the Drayton one tomorrow what wires that are in 1,2,4 and 5 on the Horstmann go we’re on the Drayton?
many thanks
many thanks