Vaillant Ecotec Combi and Drayton RTS Thermostat

milli260876 · 19 Dec 2008

I found the manual and wiring diagrams online, brother-in-law fitted the boiler (he's a plumber) but is worried about wiring the thermostat in case he pops a fuse...
Seems pretty straight forward to me 2 wires to connection 3&4 only problem being which way round??doesn't seem to tell you in the boiler install manual.
Below is the bumph and attached are the wiring diagrams, any help would be greatly appreciated.

Drayton RTS

milli260876
19 Dec 2008
2

Vaillant Ecotec

milli260876
19 Dec 2008
2

The boiler terminals 3, 4 and 5 are for connecting external
electrical controls such as a time switch and/or room
thermostat. Terminals 3 and 4 are linked together when
the boiler is supplied. If external controls are used, this
link must be removed, and the controls connected
across terminals 3 and 4. Terminal 5 is an additional
neutral connection for external neutrals such as from
the anticipator of a room thermostat.[/img]

bobw1956 · 19 Dec 2008

yes its as straight forward as u sugest, either way round will do

gas4you · 19 Dec 2008

Terminal 3 is power out and 4 is power back in.

milli260876 · 19 Dec 2008

So 3 to 3 and 4 to L ?
Is that right???

chappers · 19 Dec 2008

It doesn't matter you are just creating a simple live circuit which is broken when the stat turns off.
What sort of boiler are you connecting it to, if a combi you should really be using a volt free model which the rst 1 or 2 isn't really designed to be used as.

milli260876 · 19 Dec 2008

It is for a combi, I bought a new-build house and have the exact same stat on my combi at home tho??

gas4you · 19 Dec 2008

As you do not need volt free connections, assuming the wiring diagrams you have posted are accurate, you could just wire the call for heat to terminal 4 on the pcb.

milli260876 · 19 Dec 2008

This seems to be getting more complex the more replies i get volt free or not volt free, that is the question...?

Will i blow any fuses on the boiler if i get this wrong or will it just not work and i jump 3to4 on the pcb again to sort things out???

gas4you · 20 Dec 2008

Your boiler does NOT need volt free connections for standard external controls.

Either take the switched live from boiler 3 to stat , then back to 4 from stat, or link permanent live in stat to common in stat then just take stat switched live back to 4 on boiler.

gavinda · 20 Dec 2008

milli260876 said:
I found the manual and wiring diagrams online, brother-in-law fitted the boiler (he's a plumber) but is worried about wiring the thermostat in case he pops a fuse...
.

id be more worried about the boiler he's fitted if he cant wire a stat.

milli260876 · 20 Dec 2008

His company has always used electricians and he's been a plumber 15 years and is more than capable.. think that post was pointless to be honest mate.
He just wants to be careful which is better than the gung-ho wire it any way that i've seen on some posts on here!!!
If ya can't be helpful maybe keep it to yourself eh? after all isn't it the season of goodwill???

gavinda · 20 Dec 2008

fair play

.

Agile · 22 Jan 2010

I would also be as concerned as Gasvinder ( or more ) if someone who had been working on heating installations for 15 years could not wire up a simple room stat to a new boiler.

"Plumbers" usually do plumbing, thats water supplies, drainage, installation/repairs to water using items like baths, basins, WCs, storage tanks and water supplies.

Boilers by law have to be installed by someone who is gas registered. Otherwise they cannot correctly notify to Building Control or complete the Benchmark Certificate.

Are you sure he is gas registered?

Tony

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Vaillant Ecotec Combi and Drayton RTS Thermostat

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