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Ribenapigeon |
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Ribenapigeon Super Spammer
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grr666 |
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grr666 Super Spammer
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Posted: 17:41 - 12 May 2017 Post subject: |
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Have you tried boiling your head? ____________________ Currently enjoying products from Ford, Mazda and Yamaha
Ste wrote: Avatars are fine, it's signatures that need turning off. |
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arry |
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arry Super Spammer
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Rogerborg |
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Rogerborg nimbA
Joined: 26 Oct 2010 Karma :
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Posted: 18:11 - 12 May 2017 Post subject: |
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The expansion chamber has a standard Schrader valve, you can repressure it with a bicycle pump.
Cap off, press the stem. If water comes out, that's your problem, the membrane has gone. If it's dry and up to pressure (~1.5 bar) then you've possibly got a leak. It could be somewhere you can't see.
I've had great success with dumping leak stop goo in. It... stopped a leak somewhere on the system. Can't really say fairer than that.
If you have a filter on the system you should be able to get it in there, or shut off a radiator, remove the bleed valve stem, and see if you can get in that way with a syringe - ask one of your customers to supply a big one.
It wouldn't hurt to put more inhibitor in while you're doing that. ____________________ Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike |
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Freddyfruitba... |
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Freddyfruitba... World Chat Champion
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Ste |
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Ste Not Work Safe
Joined: 01 Sep 2002 Karma :
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Ribenapigeon |
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Ribenapigeon Super Spammer
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Dave500 |
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Dave500 Traffic Copper
Joined: 26 Feb 2014 Karma :
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Posted: 19:53 - 12 May 2017 Post subject: |
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If the engineer is using a bike pump to re charge the expansion chamber its probably on it way out and could be leaking slightly. If its towards the front of the boiler get a quote. In the mean time look for leaks on pipework or on radiator valves. ____________________ Bye bye Z hello Versys |
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Bikeless |
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Bikeless World Chat Champion
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Rogerborg |
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Rogerborg nimbA
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mudcow007 |
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mudcow007 World Chat Champion
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angryjonny |
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angryjonny World Chat Champion
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ScaredyCat |
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ScaredyCat World Chat Champion
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Ribenapigeon |
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Ribenapigeon Super Spammer
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angryjonny |
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angryjonny World Chat Champion
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Ribenapigeon |
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Ribenapigeon Super Spammer
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stinkwheel |
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stinkwheel Bovine Proctologist
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Ribenapigeon |
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Ribenapigeon Super Spammer
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stinkwheel |
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stinkwheel Bovine Proctologist
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arry |
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arry Super Spammer
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Ribenapigeon |
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Ribenapigeon Super Spammer
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Al |
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Al World Chat Champion
Joined: 26 Feb 2006 Karma :
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Posted: 18:30 - 16 May 2017 Post subject: |
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The expansion vessel is often inside the boiler so if it had to be fitted at a high point you'd be limited on where the boiler could be installed.
The air side is also normally set at a slightly lower pressure than the heating water side which wouldn't be possible without the rubber diaphragm. ____________________ Yamaha FZR400RR 3tj
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Rogerborg |
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Rogerborg nimbA
Joined: 26 Oct 2010 Karma :
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Posted: 19:32 - 16 May 2017 Post subject: |
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Why a combi system needs to be sealed rather than the much more tolerant feed-and-expansion system does actually puzzle me. I've never seen a simple explanation for why.
I've read articles suggesting that sealed combi systems have become the default because:
They're easier to fit.
They generate much more repeat business for plumbers.
My current combi system is 7 years old and has had three callouts this year, all down to crud in various small-tolerance components, the last being the narrow diameter hose to the expansion vessel. The wrench-monkey was very familiar with the problem.
This despite having a magnetic filter that I clean out regularly, while re-dosing with inhibitor. A process that is much easier with a F/E tank.
The wrench-monkeys have covered this up each time as "component failure" because they know fine well that silt is a specific exclusion on these plans, and they don't want the payment for their services being argued. It'll catch up on me soon though, and the system will be "beyond economic repair" at closer to 5 years than 10.
At which point I'll be asking about options for re-plumbing the feed/expansion tank in the attic, putting a hot water tank back in (should never have let them take it away) and fitting a solar or ground source heating loop for it. ____________________ Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike |
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angryjonny |
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angryjonny World Chat Champion
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MCN |
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MCN Super Spammer
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Old Thread Alert!
The last post was made 6 years, 345 days ago. Instead of replying here, would creating a new thread be more useful? |
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