Baxi 105e: Plate heat exchanger - can this be cleaned?

[raidwi]

Have replaced the original plate heat exchanger on my Baxi 105e following issues with boiler cutting out, and rather than throwing it away was wondering if it can be used again by someone else if sufficiently cleaned?

I ran it under a tap and some black bits came out, but not too much. Does it need special chemicals to remove any rubbish in there?

 

[gas112]

The manky side fill it with brick acid for 20 mins then flush it thoroughly , be as good as new.

Sika Brick and Patio Cleaner - 5L | Wickes.co.uk

Sika Brick and Patio Cleaner - 5L

www.wickes.co.uk

 

[75pete]

Sika B & P cleaner contains Hydrochloric acid as per the data sheet. This acid will attack SSteel.

 

[gas112]

Sika B & P cleaner contains Hydrochloric acid as per the data sheet. This acid will attack SSteel.

At the concentration involved it doesnt damage plates at all i have used it hundreds of times over past couple of decades and on the odd occasion i have left it in for days when i have forgot that they are being cleaned with no ill effect

 

[Agile]

I would use hydrochloric acid at about 7% for cleaning plates.

Usually using two applications of the acid. Sometimes warming it up to about 30 C and particularly moving it around quite a lot.

 

[75pete]

Kamco FX2

 

[dilalio]

Spirit of salts used to be perfect but they've diluted that right down now.

Got one at the moment that it didn't touch... Still getting brown flakes out of it after treatment then bashing and flushing with mains water... And getting wet as I need to find a good nozzle that will fit the damn orifices in the plates!

 

[raidwi]

Is some X800 the safest option that will still effectively clear any magnetite?

 

[dilalio]

Nothing wrong with hydrochloric acid as said above. Been using it for years.

 

[dilalio]

Is some X800 the safest option that will still effectively clear any magnetite?

You can try.

 

[gas112]

Is some X800 the safest option that will still effectively clear any magnetite?

do not leave any x800 in the system every bit needs flushing and draining out. You have been told just use brick acid