descaling the heat exchanger(s) in a Elson Coral E

[theflyingpig]

Hi All,

Having spoken to Elson I understand the heat exchangers can't be removed and must therefore be descaled using a pump. Next stop was HSS - over 60 quid for the day!
Anyhow, a couple of questions. . . . .which product to use? how long do you pump the fluid around each exchanger for? and, not having seen the machine yet - I assume you cn connect it to compression fittings?

many thanks for any advice

Huey

 

[theflyingpig]

the more I think about this the more I don't understand why I can't proceed as follows:

turn off supply

drain heat exchangers

undo connections to the heat exhanger (these are the coil type heat exhchanger that sit at the top of the thermal store)

put a cork in one of the heat exchanger connections

fill heat exchanger with descaling solution using a funnel or whatever.

cork if off so solution sits in heat exchanger for a while

flush through using garden hose

repeat.

reconnect.


or am I missing something glaringly obvious???


thanks !!

Huey

 

[theflyingpig]

anyone got a clue what I'm on about??

 

[bengasman]

If the manufacturer says it can’t or should not be done, do not do it.

 

[spudkey]

the reason for using a pump is that you will have a tank of descaling solution giving a reserve of soultion in relation to the ammount of scale in the coil.simply pouring solution in coil will result in scale neutralising the solution and hence be useless. trying to descale this way will require endless draining and refilling of coil also when acid descaling a gas is given off so dont plug off outlets

 

[theflyingpig]

thanks for the explanation spudkey - makes sence. wondering whether in invest in a machine - its my friends boiler that needs doing and its in a block of maybe 50 flats all with the same boiler . . . can kinda see it paying itself off pretty quickly!
see you can pay big bucks for these, but I'm thinking something at the cheaper end of the range would do for this - not like it'll be flushing CH systems. . . . .any reccomendations? and, are the chemicals easy to get hold of?
cheers