wiring room thermostat

[stuff4jas]

Im wanting to wire a drayton combi stat to my new boiler but im having trouble getting my head around the correct wiring.

*Ive fitted 3 core and eath as a link from boiler to stat.

*there are 4 terminals on stat N-2-3-L

* the boiler wiring terminals are 1-2-3

* the boiler instructions say- connect room stat between terminals 1 and 3

but also shows a diagram for stat with delay resistor that uses the nuetral from the boilers power supply.

Ive had a good look on the net but no joy.

The boiler is a biasi riva advanced he

The thermostat guide says use a 3 wire system so Im hoping someone will have an answer for me and put me out my misery.

Thanks for any replies

Jas

 

[kme]

check on the stat, as to which terminal is which ( of 2 / 3, one is "call for heat" & one is "satisfied". You don`t need the "satisfied" connection.

stat "N" to boiler "N" (as shown on your diagram)

Earth - earth (obviously)

terms 1 & 3 of boiler to "L" and "call for heat" on stat ( if possible, whichever is perm. live of terminals 1 / 3 on boiler should go to "L" of stat.

Does that help?

KME

 

[stuff4jas]

Hello

Thanks for the answer.

How do i determine whether 1 or 3 is the permanent live?

Cheers

Jas

 

[kme]

Test with a meter?

 

[wozz]

the neutral is for the resistor in the stat, it warms the gas in the bellows making the gas react faster to changes in the air tempreture.

 

[kme]

Indeed it does, Mr. Wozz. Well done

 

[a1]

I'd love awrite up on this from anyone who has the time and Patience.

A "Dummy's Guide" explaining it all. Maybe then, I will be able to understand it. O)

We could make it a sticky, and I will also put it as a PDF on my website, with a link from our Download Area - And you will be down as the Author, should you wish.

 

[a1]

Is this Wiring diagram any good to you?

Wiring Diagram is on Page 32.

Connecting (wiring) a Biasi Riva Advance HE Combi Boiler to a Room Thermostat (Both a room Termostat and a Room Thermostat with delay Resistor) Both 230V...

Click here to view the Installation User Manual, Inclusive of Wiring Diagram

It appears that, from Left to right - we have the Perm Live, Switch Live (center) and Earth. (But as KME said - Check them).