i have the following boiler

http://www.tradeplumbing.co.uk/asset...IASI_BOILERS/H
E%20combi%20boilers/INSTALLATION_RIVA_COMPACT_HE_3804_EDITION.pdf

the manual states that i should connect a room thermo stats to the terminal 1 and 3.

the thermostat stat it self has more than 2 connections.

it doesn't actually say what wire should be connected to which terminal.

does any one know what those two wires are for. on the thermo stat there is L, N and eath

the boiler manual says do not connect live wires to terminals to which the room thermostat must be connected.

all it shows is a picture of a thermos stat and the two wires shoved in to terminal 3 and 1 on the connector of the boiler.

stupid boiler manual, it doesn't give clear information.

bbuk wrote:

i have the following boiler

http://www.tradeplumbing.co.uk/asset...IASI_BOILERS/H
E%20combi%20boilers/INSTALLATION_RIVA_COMPACT_HE_3804_EDITION.pdf

I have wired a stat on a Biasi similar to this....

the manual states that i should connect a room thermo stats to the
terminal 1 and 3.

Yup. Without a stat fitten there is a loop of wire that joins 1 to 3. To
fit a stat you have it such that its contacts are between 1 and 3. When
they close the boiler fires (if permitted by the timer)

the thermostat stat it self has more than 2 connections.

Sounds like an eletromechanical stat that requires a neutral as well. If
you want to use this then you need to wire it with multicore cable and
take a neutral to it as well (without the neutral it will still work but
you will get large temperature swings between its on/off cycles making
the house rather uncomfortable. You can collect a neutral from the
"mains in" terminal block directly adjacent to the stat one.

it doesn't actually say what wire should be connected to which
terminal.

does any one know what those two wires are for. on the thermo stat
there is L, N and eath

You would in reality be better off with a programmable stat like:

http://www.screwfix.com/app/sfd/cat/...17585&ts=82132

These only need a two wire connection and allow for much greater
flexibility in the control of the house temperature. If fitting one of
these then you can basically create one "program" on the boilers timer
to allow the boiler to run all the time, then deligate the actual
control of the boiler to the stat.


--
Cheers,

John.

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| Internode Ltd - http://www.internode.co.uk |
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bbuk wrote:

i have the following boiler

Wow, it certainly seems like thermostats are in the collective
conscience at the moment!

Is this normal "in here" at this time of year? Or have energy prices
this year raised the normal level of interest?

so shall i connect the N and L to the boiler connections 1 and 3

bbuk wrote:

so shall i connect the N and L to the boiler connections 1 and 3

Connect 1 and 3 to the stat such that they are shorted when the stats
normally open contacts close.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Tue, 21 Nov 2006 08:41:18 +0000, Andy Burns
wrote:

Wow, it certainly seems like thermostats are in the collective
conscience at the moment!

Is this normal "in here" at this time of year? Or have energy prices
this year raised the normal level of interest?

This time next year, assuming the lights are still on it will be full
chat about how to build a fireplace and what is the best way to
sharpen an axe - everyone will be out in the woods chopping down trees
as the Russian oligarchs exert their power over the Europeans.


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