i have asked before but i think i must be thick any help please, using 5 core flex from spur how do i wire the flex to the 3 core that runs to the stat obviously l,n,e out of spur to boiler feed.leaving 2 cores in boiler that would connect were current link is , but back to spur i would connect these with 2 cores to the stat leaving a brown from 3 core going to stat is this not used? and how would stat connect up thanks for any help to anyone who takes time to read and understand and reply to this
alpha combi boiler
- Thread starter tashie
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baz1968
Sorry but we need more info.... What make of boiler? Are you trying to include a room stat or programmer? Where are the "links" you talk about 
sorry connect room stat and internal clock if i said start from spur were the feed from the mains is then at the spur a 3 core and earth going to room stat i want to no how to connect it up using a 5 core flex from the spur thanks
you don't put 5 core flex into a spur, and you don't put 2 outputs out of a spur..
you are wiring it incorrectly..
3 core to the boiler, from the boiler you take the wires to the room stat..
you are wiring it incorrectly..
3 core to the boiler, from the boiler you take the wires to the room stat..
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baz1968
You should only have live, neutral and earth from switched fuse. Alpha diagram here with connections for internal clock and link to remove for connection to external stat/time switch.
http://www.alpha-nextgen.co.uk/downloads.asp
http://www.alpha-nextgen.co.uk/downloads.asp
I wire alot of valliant combi boilers
I run a 2.5 t+e cable from the mains board to a spur by the combi then i run a 1mm three core from the stat to the spur then i run a five core flex from the boiler to the spur thats L N E for the boiler then live and switch live for the stat Then in the back of the spur i connect the two lives of the three core to the live and switch live from the boiler using 2 connector blocks then i connect the nuetral from the 3 core to the load side of the spur
not sure wether alpha boilers are different never worked on one
hope that helps
G.T.S
I run a 2.5 t+e cable from the mains board to a spur by the combi then i run a 1mm three core from the stat to the spur then i run a five core flex from the boiler to the spur thats L N E for the boiler then live and switch live for the stat Then in the back of the spur i connect the two lives of the three core to the live and switch live from the boiler using 2 connector blocks then i connect the nuetral from the 3 core to the load side of the spur
not sure wether alpha boilers are different never worked on one
hope that helps
G.T.S
well than you're wiring the spur wrong..
you are not supposed to put more than one accessory on the load side of a spur..
it's also bad practice to put the switched live into a connector block..
you need to wire 3 core flex to the boiler for power, and the stat straight to the boiler..
you are not supposed to put more than one accessory on the load side of a spur..
it's also bad practice to put the switched live into a connector block..
you need to wire 3 core flex to the boiler for power, and the stat straight to the boiler..
Which is exactly as it is shown on the wiring diagram (page 5 of the link above).
How difficult can it be.????
LNE to the fused spur and a separate wire for the two wires for the stat .
How difficult can it be.????
LNE to the fused spur and a separate wire for the two wires for the stat .
Why? the stat is part of the boiler wiring and if you install the spur on a ring main then there will be two input cables
why?
that way you end up with 2 cables my way you have one and it looks neater
Just my opinon
G.T.S
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