Wireless Programmer Advice

[Last plumber]

Oh dear,
do you actually know anyone has been prosecuted just for opening the boiler case also can you help me find that exat law please?

Thanks

No I Don't know anyone

 

[Leesparkykent]

What make is the boiler?

 

[hightower]

What make is the boiler?

Hi mate, I have no idea. I'll drop him a message to find out.

 

[hightower]

@Leesparkykent It's a Worcester green star 25si

 

[hightower]

So looking at manual I believe I need to take the Ls to the common of the receiver, and the Lr comes from the NO of the receiver to the Lr on the boiler. Would this be right?

 

[Last plumber]

So looking at manual I believe I need to take the Ls to the common of the receiver, and the Lr comes from the NO of the receiver to the Lr on the boiler. Would this be right?

Yes, that's right. It's 230V on those so you could use a 230V from a link in programmer. Either way. ( Double check it is 230v, I'm sure it is but not looked at a Worcester for a few week ).

 

[hightower]

Just trying to get my head around CH in general, so with this being 230v does that mean I don't need to take the feed from the boiler's Ls and Ns terminals, and can take it from a suitable feed, and then just provide it with a Lr at 230v?

I know this probably won't be practical, just trying to get my head around the theory.

 

[Last plumber]

Just trying to get my head around CH in general, so with this being 230v does that mean I don't need to take the feed from the boiler's Ls and Ns terminals, and can take it from a suitable feed, and then just provide it with a Lr at 230v?

I know this probably won't be practical, just trying to get my head around the theory.

Yes. Sometimes is easier depending on how many cores in flex/cable etc.
It's no prob if it's 230V .

 

[hightower]

Yes. Sometimes is easier depending on how many cores in flex/cable etc.
It's no prob if it's 230V .

So when and why is 24v or volt free contacts used, if you don't mind me asking?

 

[hightower]

So, I think by volt free that doesn't mean there's no voltage on the contacts, just that the voltage is separate from the mains voltage. So, a solenoid that is switched open and shut by the 230v mains, but the contacts on switch are separate and therefore can be any voltage you need? Am I thinking about this correctly?

Therefore, if the boiler takes 230v on the switch you can just link the 230v of the supply to the solenoid to the common, and that way it will send 230v up it when it is closed? However, if the device to be switched need a lower voltage, you instead apply that to the common terminal so that the correct voltage is returned when it is closed?

I think I'm slowly getting my head around this, it's the naming of "volt free" that threw me off.

Why would a boiler not want 230v on the switch, I mean, why would a boiler need a 24v return to switch it? Can you give me an example of a boiler that uses this so I can download the manual and take a look?