Hi all, I've got an RF room stat and want to wire it to my boiler. I'm 99% sure I've got the right plan, but would like a sanity check before I switch it all on.
The boiler is a Unica 32 HE. Manual here, and pages 27 and 28 are the relevant ones:
http://cdn0.vokera.co.uk/wp-content/uploads/2009/04/unica-he-installation-and-servicing-manual.pdf
My boiler currently has a mechanical clock installed, which I've confirmed is wired as per Fig 39 on page 27.
The RF stat is a Siemens RDJ10RF. Manual here, with page 10 showing the wiring diagram.
https://w3.siemens.co.uk/buildingte...ocumentation/Documents/RDJ10RF Data Sheet.pdf
Siemens video here, relevant bit at 3.26 (24v wiring) or 3.39 (240v wiring).
Here is a photo of the current boiler wiring with mechanical clock:
http://tinypic.com/r/124ioaq/9
And the clock itself:
http://tinypic.com/r/k0r81l/9
I've removed the clock (black switch wires to A and C, and power from D and E).
I've got an isolated L and N feed for the stat from outside the boiler, so that's fine.
Assuming* it's 240v wiring I need to bridge L and Lx in the stat (according to the video), so that's fine too.
I then need to connect L1 in the stat to somewhere in the boiler. This will either be A or C on the M5 block.
I think L1 goes to A - can anyone confirm or tell me I'm wrong please?
I'm a bit confused because the current clock closes/opens a switch between A and C on M5. The new stat looks like it only has one wire to A (or C?). Is that where the link/bridge between L and Lx in the stat comes into it, i.e. the live feed comes from the mains into the stat, and then is fired out into A?
How can I confirm I need to wire the stat for 240v and not 24v? The boiler manual doesn't explicitly say. I'm going off the fact that the mechanical clock was 240v, and the stat is simply replacing the clock. However, there is also a loop on M3a in the 24v part of the box. Again, 99% sure it's 240v but would appreciate a sanity check before I commit!
Thanks a lot in advance!
The boiler is a Unica 32 HE. Manual here, and pages 27 and 28 are the relevant ones:
http://cdn0.vokera.co.uk/wp-content/uploads/2009/04/unica-he-installation-and-servicing-manual.pdf
My boiler currently has a mechanical clock installed, which I've confirmed is wired as per Fig 39 on page 27.
The RF stat is a Siemens RDJ10RF. Manual here, with page 10 showing the wiring diagram.
https://w3.siemens.co.uk/buildingte...ocumentation/Documents/RDJ10RF Data Sheet.pdf
Siemens video here, relevant bit at 3.26 (24v wiring) or 3.39 (240v wiring).
Here is a photo of the current boiler wiring with mechanical clock:
http://tinypic.com/r/124ioaq/9
And the clock itself:
http://tinypic.com/r/k0r81l/9
I've removed the clock (black switch wires to A and C, and power from D and E).
I've got an isolated L and N feed for the stat from outside the boiler, so that's fine.
Assuming* it's 240v wiring I need to bridge L and Lx in the stat (according to the video), so that's fine too.
I then need to connect L1 in the stat to somewhere in the boiler. This will either be A or C on the M5 block.
I think L1 goes to A - can anyone confirm or tell me I'm wrong please?
I'm a bit confused because the current clock closes/opens a switch between A and C on M5. The new stat looks like it only has one wire to A (or C?). Is that where the link/bridge between L and Lx in the stat comes into it, i.e. the live feed comes from the mains into the stat, and then is fired out into A?
How can I confirm I need to wire the stat for 240v and not 24v? The boiler manual doesn't explicitly say. I'm going off the fact that the mechanical clock was 240v, and the stat is simply replacing the clock. However, there is also a loop on M3a in the 24v part of the box. Again, 99% sure it's 240v but would appreciate a sanity check before I commit!
Thanks a lot in advance!