Wiring underflorr heating thermostat

[I_spark]

Hello,
Just needed some guidance on installing a WARMUP underfloor heating thermostat.
It has 8 terminals.
1 and 2 says 230VAC L and N with 2 arrows pointing in.
3 and 4 says max load 3.6kw L and N with 2 arrows pointing out.
5 says EXT with one arrow pointing in.
6 7 and 8 says sensor 6and 7 have been linked with a number 2. 7 and 8 have been linked with a number 1.

I have two leads coming out of the under floor heating. One is a 3 core grey flat. The other is a white 2 core flat cable.

Any help appreciated, and thanks in advance.

 

[Taylortwocities]

The last Warmup I installed had no links, just 2 terminals for power in
2 terminals for power out and two for the temp probe. There may have been an ext trminal but its not normally used.

What do your instructions say?

 

[I_spark]

Hello, Thanks for that speedy response.
Do you mean 1 and 2 are supply coming in. 3 and 4 going out through the grey flex cable supplied.
Number 5 empty.
Then do you reckon 6 and will be for the thermostat?
7 not being used?

This following line is the link to the instructions.
http://www.warmup.co.uk/images/XSTAT instructions.pdf

 

[Taylortwocities]

1 & 2 supply in
3 & 4 to floor heating element

5 not used

The controller can have two sensors. If you only have one then connect it to 7 & 8 with 6 not used.

Connect supply earth to the earth screen in the heating element cable
You should have an RCD on this supply.

 

[AlHos]

In the Xstat, does it matter which way round the floor sensor wires go into terminals 7 & 8?

I also take it that the earths just go into a connector block as I have used a plastic flush mount back box and of course there is no terminal on the Xstat for Earth?

Many thanks guys.

Alan - Newbie Post 1

 

[Taylortwocities]

Alan,

Please dont hijack old posts - start one of you own - you'll get better service!

In answer to yr Q

Sensor wires can go either way round.

Yes earths MUST be all connected including the shield on the floor elements.

Do not forget equipotential bonding and an RCD and that this is notifiable work.

 

[AlHos]

Sorry - I only signed up today and after posting this found on forum guidelines that I should not hi-jack so I did set up a new topic earlier today which was replied to.

Thanks for the advice and apols again.

Alan