combi and thermostat

[wannabesparky]

can someone tell me how the wiring is configured for a combi boiler, fused spur and a thermostat for the heating please.

 

[Sintra]

can someone tell me how the wiring is configured for a combi boiler, fused spur and a thermostat for the heating please.

It really depends on the type of boiler but in general the boiler will have a permanent feed for hot water demand.
It will also have a demand signal from time clock / stat etc for heating.
Some have volt free connections for stat signal.

 

[wannabesparky]

so does the feed come from the board through the fused spur to the boiler, and then what? please forgive my lack of knowledge but still learning

 

[Matty2k52k5]

I'd imagine all the connections are to be done at the fuse spur?
The supply comes from the mains board and into the supply side, you'll need a 5 core flex going into the boiler and a 3 core going to the thermostat.

Do you know how to terminate any of the connetions? They're the only cables you should need for a basic combi system.

 

[SirKit Breaker]

Get the installation instructions for the boiler, everything you need to know will be in there in the Electrical requirements part.

 

[wannabesparky]

in what context do you mean terminate any of the connections

 

[peteludman]

there is normaly a link in the boiler for a thermastat.
so you take out the link run a 3 core cable from boiler to themostat (constant live ,switched live and neutral) and boiler fed from spur (L-N)

 

[johnnyb]

We usually have a double appliance box, flush or surface, 1x side withe the 230v supply and the other side the t/stat, then we run 2x 3c heat resis flexes to the combi , 1x mains and the other the stat, taking the link out in the combi .