Thermostat Replacement

[kamil99]

Hello,

I'm looking to replace an old analogue central heating thermostat with a digital one.

I was wondering if somebody more experienced would help me with the wiring?

Where would the wires from the old one go into the new one? I've researched it for a couple of hours and have a rough idea, but it'd be nice to have some confirmation.

My main concern are the N1 & L1 load wires.

1. Old thermostat wiring diagram
http://www.montel-css.co.uk/SupOther/Resources/honeywellt6360wi.jpeg

2. Old thermostat actual wiring
http://www.montel-css.co.uk/SupOther/Resources/dsc02209.jpeg

3. Old thermostat installation guide
http://www.honeywelluk.com/Documents/Installation-Guide/pdf/1151.pdf

4. New thermostat terminals
http://imgs.inkfrog.com/pix/Eglobal/HT0000601_9.jpg

5. New thermostat installation guide
http://milantrend.com/BYC08.pdf

Thank you,
Kamil

 

[D_Hailsham]

Do you have an existing timer? If so, set it so Heating is permanently ON.

Connect as follows:

Red (from T1) to L
Blue (from T2) to N
Yellow (from T3) to L1

There is no need to connect anything to N1

The green/yellow wire should not be connected, but made safe; e.g in a terminal block hidden behind the new stat.