Vokera Vision combi boiler

[UNG]

I am gas safe and electrical, FWIW, indeed the Hive 1,3 terms are supposed to be NV contacts, which you use to control the thermostat connections inside the boiler.
On the face of it i cannot see where this would not work.

The BG guy probably didn't like the cable from FSU to Hive and then to boiler, but thats just semantics.

Its also possible you were very unlucky, its not clear whether the PCB blew on call for DHW or whether than just coincided with a call for CH,

Either way you either wired it wrong, i.e. not as you have described or you were unlucky and the PCB blew because it had been powered down. It really does happen (alot)

My thinking is exactly the same I cannot understand why it didn't work as it should

Assuming it was wired correctly the only thing I can think caused the problem was having the 240v and 24v in the same cable and a higher voltage was induced onto the 24v side than it could cope with

BG guy can report if he wants but you are authorised to make those connections, so gas safe / HSE will probably ignore.

I understand why you may wish to avoid boilers, for me, if that happened i would have simply replaced the PCB, re-tested appliance and moved on.

It may be worthwhile, if you want to connect Hive's and the like, to know a gas safe buddy who you can call under these circumstances.

Experience and having seen it before counts for a lot and I agree with you it happens occasionally and all you can do is learn from it and carry on

 

[Zerax]

...if that happened i would have simply replaced the PCB, re-tested appliance and moved on.

At the expense of the customer or at the expense of you ?

 

[GingerSparkQ1]

Thanks for the help guys.

I must have done something wrong and haven’t realised. It’s the only thing I can think of.

So I’m right in think then that as long as I’m not touching any gas / air tight, I am allowed in to the boiler to connect up?

I am going to do a bit of reading and see if there is any training courses or anything I can do for boilers.

Thanks guys.

 

[plugsandsparks]

At the expense of the customer or at the expense of you ?

Customer , of course

 

[plugsandsparks]

Thanks for the help guys.

I must have done something wrong and haven’t realised. It’s the only thing I can think of.

So I’m right in think then that as long as I’m not touching any gas / air tight, I am allowed in to the boiler to connect up?

I am going to do a bit of reading and see if there is any training courses or anything I can do for boilers.

Thanks guys.

The MI's specifically state that the electrical connections must be carried out by a competent person to BS7671, thats you( i hope, lol)

Many boilers are engineered so that the external connections are accessible without too much dismantling. The only issue is that most modern boilers use the external case as a seal to enable it to be "Room Sealed", i.e. under no circumstances can nasty gases enter the room. The case is usually held on by one or two screws and clipped. As long as you replace the cover perfectly, its all good.

I only do commercial stuff and its why i have both electrical tickets and gas tickets, its to prevent a client being without heating under most circumstances. E.g Just before Xmas got called to no heating in a warehouse from Gas fired warm air heater. The problem was quickly diagnosed to be main air circulating fan motor. That was because of my electrical fault finding skills, as i also know a good motor supplier locally i managed to source a replacement and get the heater back working in less than 22 hours from initial call.

Another was an office combi boiler, no heat at all. Although diagnosis was largely an educated guess, i put my money and reputation on it being the pressure switch, although the manufacturer support line was less than impressive. I managed to source a replacement, next day and get it fitted.

So you can see why having good electrical skills is in-valuable when keeping modern stuff going.

The gas tickets are trickly to get, but in my view well worth the effort, and boilers are fun