New boiler install - wiring check

[MJCH]

Hi all,

I had a new boiler installed the other day and it keeps running all the time and doesn't shut off.

When the guy was installing it, he blew a fuse, so that didn't inspire confidence.

The boiler is fed by a 5 core and he's connected the black wire to Lr and the grey one to Ls. Has he got this the wrong way round? The boiler is a Worcester bosch 32cdi compact combi.

The heating system is a combi, with two heating zones and has two Danfoss HPA2 motorised valves upstairs.



Thanks for your help!

 

[flameport]

connected the black wire to Lr and the grey one to Ls. Has he got this the wrong way round?

Won't matter which way round, those just activate the boiler when connected together.

What does matter is what those wires are connected to at the other end.

 

[MJCH]

Ah ok, I see what you're saying. I'd need to know where those cables terminate on the wiring board upstairs and how they connect to the motorised valve. I have a picture of the wiring board upstairs (not a very good one) and you can see the two motorised valves coming in from the bottom, which have four cables each.


The picture below is the one directly next to the boiler:



The guy is supposed to be getting back to me about a fix and he's sent a picture off to an electrician to check. I just wanted to make sure it was 'safe' to leave it the way it is at the moment? Is there any danger of it damaging the PCB or anything else, like the stats?

Thanks in advance,

 

[flameport]

I just wanted to make sure it was 'safe' to leave it the way it is at the moment?

Impossible to know. Given that a fuse has already been blown, probably not.

For a new install, that is exceptionally poor.
The whole lot needs to be redone properly with a wiring centre, similar to this:

 

[Risteard]

When the guy was installing it, he blew a fuse, so that didn't inspire confidence.

What did you do to upset him?

 

[MJCH]

Haha, thanks, I needed a laugh as I'm not very happy right now.

I'm going back to BOXT to complain about this failed install and demand they send a qualified electrician to look at it.

 

[stem]

It's not uncommon that if a short circuit occurs as a programmer or a thermostat switch 'on', that the electrical current drawn for a split second before the fuse blows is sufficient to weld the two parts of the switch together, resulting in a permanently 'on' situation.

 

[CBW]

Looks wired wrong to me, not as per mi’s. Have you had anyone back yet?