Thorn Apollo Heat Exchanger...........

[sneakyprawn]

Hi from a NEWBIE.

Thorn is about 25 years old, doing very well, but heat exchanger is getting noisy............when on full burn.

I have inhibit in the heating system but no protection on the hot water side, so i suspect limescale and scum build up.

Is there a way to flush this out.......safely......i say this as my last house had a combi with NO lime scale protection, and a cowboy used an acid mix to flush the system, yes it cleared the heat exchanger, but the acid ate holes in it also................so i had to buy a new combi.

I just want to flush some of the crap out of the heat exchanger without causing damage so at leat my new magnetic limescale preventer has got a chance of keeping the scale down.....

I dont want a new boiler, just give it new life, so is it a flush out with some sort of chemical or a new exchanger..............

thank u

 

[Agile]

You seem a bit mixed up by whats what.

If your very old boiler is kettling you can add X200 to the heating system water and it will probably quieten it.

You can leave the X200 in the system!

Tony

 

[nickso]

pretty sure apollo h/e's are NLA.

 

[sneakyprawn]

It only makes the kettle sound on HOT WATER demand, the HEATING has new inhibit, thats what makes me think the heat exchanger is clogged on the hot water side as i have no limescale protection...........and its 20 odd years old, .............

 

[sneakyprawn]

@ nickso what is NLA, told u i was newbie.............lol

 

[sneakyprawn]

@ Agile.

Why add X200 will make things less noisy.............on the HW side, should i flush the entire CH system and refill adding X200.

Advise would be great, i have just repalaced the thermocouple and knackered spark electrode where the insulation had broken.....

All the crap has been vacuumed out of the unit, and crap and dust/cob webs off the heat exchanger..........

When i just use heating, the noise is okay, but when i use hot water its noisy, is suspect it the hot water side not being protected by a limescale device as i live in a hard water are, where as the heating side uses proteted water via the aditive..............

 

[twgas]

I think you need a RGI as you have compromised the seals - they need checking, assuming it's room sealed, if open flue have you checked the flue is working correctly. Also the gas rate/burner pressure/combustion may or may not bo correct!!!!!!!!!

 

[expertgasman]

Thorn Appolo - Heating side & hot water side?

 

[twgas]

Thorn Appolo - Heating side & hot water side?

wouldn't be surprised if there's a valve on primaries turn too far to the off position, slowing circulation.

 

[adlplumbing]

nla = no longer avaible
and why spend money on boiler that is that old and obselte

 

[PEDANTICVINDICTIVEMAN]

I didn't think DIY gas work was discussed on here..............

 

[adlplumbing]

opps sorry pendant spent too much time in the cc

 

[Egga]

Hot water side on an Apollo??

 

[cozzmic]

disregard

 

[nickso]

nla = no longer avaible
and why spend money on boiler that is that old and obselte

why not on a boiler that doesn't need a new hex? apollo is a sound boiler but if the hex is gone it's game over.