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AndyA
Junior Member
Joined: 23 Aug 2007
Posts: 25
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 Posted: Sat Dec 01, 2007 8:56 pm Post subject: Ideal Elan II Kettling and banging . . . badly |
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Hi all,
I've had advice before several months age (not quite the same topic) but I can't find my original post.
I have an Ideal Elan II boiler and it must be 18 - 20 years old so it's seen better days, but I'm doing my best to keep it going for now.
Over the last couple of years or so I've replaced numerous parts after advice from various sources, parts include the pump, the round thingy with 3 pipe connections that allows expansion/overflow ... I forget what it's called now and 3 days ago I replaced the 3 port motorized valve as it wasn't functioning. I've also replaced low/high overheat sensors a few years back.
Several times I've drained the system, added the descaler, noise reducer, refilled, bled the radiators, bled the small valve near the top of the boiler, bled the pump etc and it seems ok for a while. Then after a day or so it will start to kettle and bang badly and blow hot water, steam back into the water tank.
I was sat upstairs by the boiler a little earlier and just after the banging stopped and the boiler switched off, I could hear a sort of a swishing noise as something made it's way through the pump, it didn't last long but it was there, I'm guessing it sludge/crap that hasn't been flushed out ? Oh, I've also used de-sludging additive before too. OR could it be air ?
I spotted some mention on another post of bleeding the cylinder ? I've never bled the cylinder and to be fair I've not seen anything on it that could be bled, any ideas ?
Sorry for the long winded post but I'm trying to give as much info as I remember it.
Thanks for looking. |
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4296
Location: Bournemouth
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| Posted: Sat Dec 01, 2007 8:58 pm Post subject: |
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is it still working?
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4296
Location: Bournemouth
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| Posted: Sat Dec 01, 2007 9:00 pm Post subject: |
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the noise is probally just a rush of super heated water rushing thro the pipes.
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AndyA
Junior Member
Joined: 23 Aug 2007
Posts: 25
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| Posted: Sat Dec 01, 2007 9:00 pm Post subject: |
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| Yes the heating still works and can run for a while but will kettle badly, it seemed to do it mostly when calling for hot water only, although tonight it did it on heating only. |
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AndyA
Junior Member
Joined: 23 Aug 2007
Posts: 25
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| Posted: Sat Dec 01, 2007 9:01 pm Post subject: |
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| Hinton Heating wrote: |
| the noise is probally just a rush of super heated water rushing thro the pipes. |
I hadn't thought of that. |
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AndyA
Junior Member
Joined: 23 Aug 2007
Posts: 25
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| Posted: Sat Dec 01, 2007 9:26 pm Post subject: |
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| Any help appreciated. |
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4296
Location: Bournemouth
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| Posted: Sat Dec 01, 2007 9:30 pm Post subject: |
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i think the only cure woule be to use an acid on the limescale in the heat exchanger... But with a heat exchanger that old, it may not survive it!
esp if the chemicals wont clear it!
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AndyA
Junior Member
Joined: 23 Aug 2007
Posts: 25
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| Posted: Sat Dec 01, 2007 9:35 pm Post subject: |
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| Thanks for that, can it be added to the header tank after draining the system or is there more to it ? |
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4296
Location: Bournemouth
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| Posted: Sat Dec 01, 2007 9:40 pm Post subject: |
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it'd mean taking the heat exchanger out, taking to a specialised company, who have an acid decsale bay, and putting in hydroclic acid solution, while wearing the right PPE.
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AndyA
Junior Member
Joined: 23 Aug 2007
Posts: 25
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| Posted: Sat Dec 01, 2007 9:45 pm Post subject: |
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OK that's something that I won't attempt :grin: I'll have another drain down and refill tomorrow but no doubt it'll not help. I can but hope.
Regarding the hot water cylinder, do they have a bleed valve on them, I've not spotted one ?
Thanks very much Hilton. |
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4296
Location: Bournemouth
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| Posted: Sat Dec 01, 2007 9:47 pm Post subject: |
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no blled valves on hot water cylinder, only on the pipes leading to the coil... Your open vent comes from the top coil connection anyway, i'd guess.
The more you drain the sytem, the more limescale you add, you shouldn;t keep draining it very often.
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