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Inverness

Plumbers Arms member
Plumber
Gas Engineer
Jul 28, 2013
724
66
28
Member Type
General Plumber
Can someone explain how an s plan heating system work from the sequences through the eletrics. So if I call for heating from the programmer it will send a signal to the room stat and so on and so forth...
 
L N E In

time controller /prog sends to

(heating)

room stat (calling) , which sends to

zone valve

zone vale opens (and opening micro switch)

fires boiler and pump

L N E In

time controller /prog sends to

(hot water)

Cylinder stat (calling) which sends to zone valve

zone valve

zone vale opens (and opening micro switch)

fires boiler and pump
 
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Reactions: 1 person
Something like that. We have to memorise the wiring diagram for a s plan system.
 
get your books out, have a look at the diagram in there, memorise it then draw it out a few times fm memory, do it enough and you'll never have to ask on here again.
 
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Reactions: 1 person

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