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In response to your last reply........... My fault first time around as I missed out showing Programmer terminal 1 which goes to TB1. (When I re-installed the cables after checking yesterday, I put the blue int TB2, which caused a short, anyway I realised the error and resent the post in the...

I response to your last post................. A) The switched live is a wire running from the boiler, via the programmer through a connector at the programmer, and is connected then to TB1. B) Nothing is connected to the terminal 2 at programmer. C) terminal 1 at programmer is connected to TB...

Sorry,minor error on last post............ Terminal block should have read........... TB...... 1...to B2/V4/P1/CT3 2...to P(N)/V3/CT2 3...to P3/CT1 4...to S2/V2 5...to P4/S1 6...to V1/S4 7...nothing 8...earth The difference is P1 at TB1 has moved from TB2 Need a modified wiring...

Prior to evaluating the destinations of the cables, I took volatages as follows............ 1. Programmer ON via fused spur, but each output as OFF: L=240volts and S/L =0 volts. 2 Programmer HW only: L=240 volts and S/L =0 volts 3 Programmer CH only: L= 240 volts and S/l =240 volts 4...

Yes I love my biking, and normally go out with about 6-8 mates. We either go into N Wales or N Yorkshire. My bike does 0-60 in 2.6 secs and 0-100 in 6.7 secs.....I love it and have been biking for almost 50 years!!!!! Like your friends, biking becomes a disease you cannot get rid of...

Thanks for that. As it is the first time I have used the site, I wasn't sure which box to tick!!! Anyway, as you suggested, the 4th cable may be incorrectly connected somewhere. Until I identify clearly which cables go to where, I don't think we will be able to resolve this problem...

Just to clarify further......... The fused spur feeds the programmer in the kitchen. There is a thermostat in the hall. (presumably connected to the conn block There is a 3 port valve in the airing cupboard, connected to conn block. There is an 8 way connector block in the airing cupboard...

Mr Hailsham, thanks for your help so far...... 1 to 5 is exactly as you described at my boiler, and as I have wired it. From what you have said, I need to connect a four core cable between the wiring centre (not the programmer) and the boiler. Currently the fused spur feed is at the programmer...

Tony, The original boiler was 50k btu, and I replaced it with a much larger boiler due to recent extensions on my house. Yes the new pump is part of the boiler. My current power supply is at the programmer in the kitchen. The boiler is about twenty feet away in the back of the garage, but I...

Thanks for that. I was under the impression that the permanent live, not the switched live went to terminal 2 on the boiler, and that this wire would be the original live cable for the (Now removed ) frost stat at the old boiler. There has been no change with the piping ports. I can put a...

I have recently fitted a Main system 28 HE boiler, to replace my ageing standard b/f boiler. I removed the old ch pump and wiring, as the new boiler has its own pump. I have a Drayton 3 way valve for CH/HW/both, which was new about two years ago. When the CH is on it is fine...brilliant in...