central heating help - pressure.

Ahh a Baxi Dou Tec throwing up an e119 (pressure too low)

Ordered 15 of them bad boys (well Duo-tec 2s anyway) today for a site

Pointless for the thread I know lol
 
CRUMPLYPORK said:
No need to worry the boiler has a pressure release valve inside that will release pressure when it reaches to 3.0 bar,
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Your right it will have a PRV but thats a saftey feature for when the boiler goes wrong it should in normal operation never ever fire and the chances are if it does it will need replacing as they very rarely seal again.

psd99 said:
thanks guys well let me tell you what has happened to far

got home system off and cold pressure bar was at 1.5

when I turned the heating on the pressure went up to to 2 and then it started to hit 2.5 and just about to get into the red

I then turned the heating off - I should bleed the radiators next when the system is cold
basically I'm going to try aim for 1.0 for when the system is cold/off that should do it hope it works.
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You have a serious fault bleeding the radiators will not fix it neither will setting the pressure when cold lower. You are geting a pressure rise of more than 1 bar during operation which almost certainly means a failed expansion vessel. Call a professional to check your expansion vessel it may just need re-pressurising but will probably need replacing.

psd99 said:
so say it gets to 3.0 then will the heating turn off automatically and how much pressure will be released?

what I want to know is how dangerous can this be?

that's what worries me
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When it hits 3 bar the system will vent water until such time as the pressure drops below 3 bar (more realisticly 2.5bar) the heating will then carry on working but once cool the pressure will be very low probably preventing the heating from starting up due to low pressure.

The PRV is a saftey feature an should never operate during normal usage if it does you have a problem that needs fixing not radiators that need bleeding.
 
leaskovski said:
Whats the deal with the pressure going down over time. How are you able to tell if it a leak or just the usual pressure drop that happens on most systems? Or is it not meant to drop over time?
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In a very well sealed system with high quality radiator valves and minimal micro leaks then you can expect pressure to be maintained bettween anual services. This is however not the norm and most sealed systems require a top up once or twice a year, I would say if your topping it up more than once every 1-2 weeks or by a significant amount then it might be worth investigating leaks. These are most comonly found on radiator valves as they are generally rubish, small leaks tend not to result in puddles or stains as most water leaks when the sytem is on and at max pressure so the pipes and valves are hot evaporating the leaking liquid.
 
a1ex2001 said:
You have a serious fault bleeding the radiators will not fix it neither will setting the pressure when cold lower. You are geting a pressure rise of more than 1 bar during operation which almost certainly means a failed expansion vessel. Call a professional to check your expansion vessel it may just need re-pressurising but will probably need replacing.

.
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how much should it cost to get that repressurised? or changed even. - where is that expansion vessel - is that like the massive tank upstairs or what?
mmm just seen pic of expansion vessel I don't recognize that we got something like that!!

I don't know much about central heating but we don't have one of those systems that is "instant" it is one of those systems where you got to turn the water on first let it run for 30 mins then we get hot water - I don't know if this matters to my problem or whether it means we do or do not have an expansion tank.


also how dangerous is it to run my heating as it is?
 
what make/model boiler is it , as macca mentioned your initial "inhibitor x100 sentinel" is some sort of descaler from the looks.

sounds like you have a combi boiler, but it shouldn't take 30 minutes to get hot water.

e119 should be detailed in the manual or if your lucky on a label on the boiler, got one on my combi boiler will try to remember to have a look after work.
 
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mp260767 said:
what make/model boiler is it , as macca mentioned your initial "inhibitor x100 sentinel" is some sort of descaler from the looks.

sounds like you have a combi boiler, but it shouldn't take 30 minutes to get hot water.

e119 should be detailed in the manual or if your lucky on a label on the boiler, got one on my combi boiler will try to remember to have a look after work.
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mmm I thought that was the model of the boiler though. I'll look again.

yer it must be a combi boiler then cuz you know like some boilers the water is instant meaning that you don't need to turn on the hot water button before etc

anyone if it is combi does that mean I still have an expansion vessel?
 
yeah you still have one.

need to check the code really, had a quick google and e119 relates to pressure loss, was only a quick scan but it didnt indicate expansion vessel problems, more leaks, really depends on your boiler.

the e119 in google seems to relate to Baxi combi boilers.
 
okay thanks just to clarify no error messages now just that damn bar is too high

time to call the guy who set this all up :)
 
man said it will be fine and I should release some pressure from radiator

trust that judgement so far.
the pressure is just into the red - heating been on 2 hours now. i.e 2.5
 
Guarantee you the expansion vessel needs re-pressurising. I'm lucky if a day goes by around this time of year where I don't do this for someone (people just turning on the heating after being off all Summer).

a1ex2001, I don't know where you got the idea that it will "probably" need replacing, most expansion vessels will out-last the boiler and even if it doesn't they usually last in excess of 10 years in a clean system. They will however need re-pressurising every 2-3 years.

Whether you've got a combi-boiler or a system boiler is irrelevant for this problem, you've got a sealed system regardless. The expansion vessel will likely be inside the boiler (unless you have a LOT of radiators) and is not user serviceable.
 
St0rmer66 said:
Guarantee you the expansion vessel needs re-pressurising. I'm lucky if a day goes by around this time of year where I don't do this for someone (people just turning on the heating after being off all Summer).

a1ex2001, I don't know where you got the idea that it will "probably" need replacing, most expansion vessels will out-last the boiler and even if it doesn't they usually last in excess of 10 years in a clean system. They will however need re-pressurising every 2-3 years.

Whether you've got a combi-boiler or a system boiler is irrelevant for this problem, you've got a sealed system regardless. The expansion vessel will likely be inside the boiler (unless you have a LOT of radiators) and is not user serviceable.
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Thanks
 
St0rmer66 said:
a1ex2001, I don't know where you got the idea that it will "probably" need replacing, most expansion vessels will out-last the boiler and even if it doesn't they usually last in excess of 10 years in a clean system. They will however need re-pressurising every 2-3 years.
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Because they fail all the time, like every other cheaply made component in modern central heating boilers. The lack of quality in any of these devices is absolutely shocking. It's also oftne cheaper to fit a new external one yourself rather than ring a gas safe engineer to pump up the one in the boiler!

Still at least we agree that it is the expansion vessel!
 
well just to let you all know

pressure is well within the 2-2.5
heating seemed to work fine turned it on 3/4 times since

it has been pretty warm around here and I am loving it
 
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