Ideal Classic NF40

bewsh · Apr 27, 2016

Went to do a service on the above boiler today. I automatically assumed that it was on an open vent, so did the service, put it all back together but thought I'd check the airing cupboard anyway, and luckily I did. They had last year upgraded from vented to unvented and it's now a sealed system.

So I took the boiler casing off again as I was sure this boiler didn't have an overheat stat, which I was correct. The MI's say there's an optional overheat kit for fitting the boiler to a sealed system, but Ideal parts say this is now obsolete.

I ended up at risking it as no overheat protection. There was a prv in the a/c though. Is this the correct classification?

Cheers!

gassafe · Apr 27, 2016

Iv always wondered what the classification is as I had this once too... An ideal Mexico on sealed system...

Iv also been to an old system where the boiler had been converted to sealed when they had a loft extension, the boiler had overheated itself, little balls of solder were coming off the soldered fittings above the boiler, the expansion vessel in the airing cupboard above had cooked itself & melted the inners of the check valve... I found this when I went to refill (after fitting a new boiler) so it can be pretty serious!! Luckily the customer was at home & managed to switch the boiler off!!

ShaunCorbs · Apr 28, 2016

i would of done the same ar could be just like a kettle that wont turn off

Billy Bob Bob · Apr 28, 2016

yes,you did right,no high limit stat it will cook itself,as Shaun said

gassafe · Apr 28, 2016

It should be straight forward to retro fit tho?

Most just have the those brown over heat stats wired in parrelel to the switch live etc, the phial would go into the hex ideally or strapped to the flow pipe, like the potterton profile type arrangement...?