Central heating wiring

[jdmorrisn]

Below is the wiring I intend to make for the central heating system.

This is what honeywell suggest but I want to make sure and take 2nd opinions from the knowledge on this forum.

Basically it is for central heating only- not hot water, I have a boiler, pump, room stat and programmer, no cylinder stats or port valves. What i don't understand on this wiring diagram is how the live feed gets from position 1 to position 10. Any comments?

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• jdmorrisn
• 27 Nov 2008
• 1

 

[EliteHeat]

In your diagram, via terminal 3 of the room thermostat. Is this some sort of trick question?

 

[twgas]

through these (red) switches

 

[jdmorrisn]

twgas, explained to me perfectly and what i wanted to understand - thank you.

 

[Softus]

Below is the wiring I intend to make for the central heating system.
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Any comments?

Why are you connecting the programmer 'neutral' to the earth terminal?

 

[jdmorrisn]

Cos I'm crap at drawing.. my mistake should have been to no.2 - thanks for spotting it.

Why are there no earth wires from the programmer and room stat - shouldn't there be?

 

[twgas]

double insulated / plastic,

 

[jdmorrisn]

Ok, clear - thanks for the help