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i have the Y plan diagram, they are standard, but my wiring does not seem to match up!!! that's why i am asking for help i am confused!!!

not battery operated. this is what i was wondering! i know my programmer has a separate wire running into the fused spur which is next to it (3-core) and also another wire running upstairs directly above it and into the terminal box (3-core but only 2 are used)! the first two wires link up...

i've posted a few misunderstood messages these past few days about the electrical witrings in my airing cupboard!! Anyway I now know what I have and would like to ask for some advice if possible? I have a Y PLAN: GRUNDFOS PUMP 3-PORT VALVE CYLINDER STAT ROOM STAT PROGRAMMER I know...

thanks for your help. i know that for a y-plan wiring terminal box there will be 25 wires joining up (in different ways obviously) in total. My terminal box has 22. BUT the programmer has a separate 3 core wire going into the fused spur near it with 3 more wires (blue brown and...

really, 50quid is ok, might be worth going on. basically i understand how it works, just not my system!!!lol Anyway, I know the Y PLAN WIRING diagram shows 25 wires going into the terminal box and joining up as shown. MY box has 22 wires going into it and the programmer which is...

sorry!!! what i mean is in the y plan diagram all the wires connect together in the terminal box as shown. BUT if the boiler and programmer have 2 cable each then one of them doesn't need to go to the terminal box and just straight into the fused spur instead?!!!

oh i see. so some of the cables from the programmer don't need to go to the terminal box and just go to the fused spur directly instead? same with the boiler???

i've got the diagram for y-plan wiring but was just not sure why the programmer and boiler had 2 wires each when the pump/3port valve and stats only had 1!!! a bit confusing ...

oh so it's normal then? same with the programmer having 2 wires?

should a central heating/hot water porgrammer have 2 elctrical cables from it?? One going to the terminal box to join the other wires from the pump, stst, etc, but what's the other one for??!!

yep a wire goes into the terminal box which is upstairs directly above it. and i have a y plan system, so obv the boiler wires link up with the others. i have a potterton, quite old now, i;d say 15-20 years old.

does the programmer and boiler have separate electric cables? i ask because i am trying to learn and understand my system! I know the terminal box in the airing cupbaord connects all the components up together in a specific way, ie y-plan system with 3-port mid pos valve, pump, etc. but the...

thanks for your help, really appreciate it, understand now how it all works. learned a lot. i have a new cylinder stat to replace which i posted a post about a few days ago. haven't done it yet but want it done today. the wiring is c, 1 (for call) and 2 (for satisfied) as per instructions...

i have a question: Y PLAN FULLY PUMPED system with 3-port mid position valve is wired up in a standard way i believe? BUT on diagrams the terminal box strips are numbered from 1-8! Does it matter what boxes are used, for eg on my diagram the orange wire from the mid position valve is...

btw i'm not working and charging !!!! i wish i was qualified and capable of that!!! :)

sorry, my system is indirect, 900 x 450 cylinder with coils. i have a potterton boiler, grundfos 15-50 circulating pump, close coupled cister with room stat downstairs in living room/hallway and 3 port mid position valve. just was worried if i put a different cylinder stat on that was not the...

probs i should buy a like-for-like stat replacement?!!!

vent pipe held up by the tank?!!! never heard of this before. usually the vent pipe spout is usually about 450-500mm above the water level in the cistern.

was thinking of doing this, ie just using the original wiring for the new cylinder stat, but as the new stat is a different make i wasn't sure if it'd be ok?!!! thanks 4 help.

the wiring diagrams seem a bit strange!! as my terminal box is not just numbered 1-10, etc!!!