Hive installation broke my PCB on boiler

[NiallM]

The tradesman installed the hive controller last night but it blew the circuit board on my Vokera plus 29c boiler. The boiler powers up and makes a noise but the indicitor lights don't work and there is no hot water or heating.
The tradesman connected the live and neutral on the left two connectors on the Hive, looped the live to the third connector. On the fifth connector (3) he connected to CN5 right on the PCB.
What went wrong?

 

[denso13]

The stat connection in the boiler is extra low voltage/volt free. Putting 230v volts through it is wrong, as you have found out.

 

[JohnD]

The tradesman

Interesting word.

What were his qualifications in gas boiler installation?

 

[securespark]

I would be contacting him to get it rectified.

If that fails, contact Gas Safe.

 

[Murdochcat]

I would be contacting him to get it rectified.

If that fails, contact Gas Safe.

And that won’t be cheap

Did he give you an invoice?

 

[opps]

Interesting word.

What were his qualifications in gas boiler installation?

I am not a plumber... why does he need to be "Gas Safe" to wire up a room stat? Granted, it sounds like he effed up, but he wasn't touching the gas supply.

 

[ericmark]

Only need to read the manual to see CN5 is extra low voltage. As to gas safe, I do find it a problem finding out which boilers you can assess the wiring without breaking a room seal, and which do require a room seal to be disturbed, I remember working with pumps, using a tyre inflator to pressurise the junction box to test for leaks, but with my old boiler where the cover did seal from the room, I never found a way to test the seal, years ago and boiler now scraped, and since in the garage it did not matter that much, but only real option would have been to renew the seal, which did seem a bit daft, and mothers Bosch the cover did not form any room seal so not problem removing.

Since the landlord law in England required the electrical wiring to be tested and inspected by the person doing EICR unless there is a clear instruction "gas safe" only, then it must be expected the covers are removed for inspection. As one removes the covers on my boiler, you can see the instructions inside the boiler, so until cover removed, can't even read the instructions.

So clearly the tradesman will need to repair the boiler, but this is why I only play with boilers in the summer, unless not working anyway, this is not the time of year to have no boiler.

 

[JohnD]

I am not a plumber... why does he need to be "Gas Safe" to wire up a room stat....

to make connections to a gas boiler

sounds like he was not competent to do it.

do you think otherwise?

 

[polesapart]

In my distant, carefree, and overconfident yoof I once connected 240V to the low voltage terminals on an early Vaillant.

Cost me half the profit on the job to rectify.

You can't buy experience - or perhaps here I did.