BAXI Barcelona woes

[BigBurner]

pump is on return and a 2 port electrical valve on flow ... this is there as an ant-thermal syphon valve to prevent hot water flowing by thermal loop back to bolier when boiler not on burn.

A check valve directly after the pump can do the same and cheaper and less problematic.

However, is the pump OK?
Not sticking?
Is the zone valve OK?
Is that sticking?
Is the pump switched via the zone valve end switch?

A pump can stick when started after being off. If it sticks, then the burner is on and an overheat situation. A sticking pump is difficult to diagnose and intermittent.

As your system is clean (no ferrous except the pump, I think), I doubt you will have bearing problems. but you never know. Inhibitor makers claim their products lubricate pump bearings. Is there enough inhibitor in the system?

Grundfos have ceramic bearings, while Wilo are carbon (plastic). Dirt in the system will degrade Wilo pumps quicker than Grundfos.

 

[BigBurner]

Have ordered new Flow Temp Thermistor & combustion box door seal for tomorrow.

Report back when fitted.

 

[RickH]

pump is on return and a 2 port electrical valve on flow ... this is there as an ant-thermal syphon valve to prevent hot water flowing by thermal loop back to bolier when boiler not on burn.

A check valve directly after the pump can do the same and cheaper and less problematic.


Maybe ... but this was a system design by Nuheat came as a package.

There is nothing ferrus in the circuit, and running OK most of the time ... but as you say it could be sticking after a long 'off' period but would be difficult to diagnose.

Today not locked out once yet .... locked out at least 8 times yesterday ... wiating for Thermistor & door seals to arrive at merchnats.

 

[RickH]

OK ... seems 'safe' to report update.
Day I made last update we had 12 shutdowns in a 24 Hr period ..... then ran 100% OK the next day ? ....
Anyway changed the flow thermocouple as it had arrived ....
Since then not one failure, more than 2 weeks .... and it's had a lot of use with this cold weather & Xmas.
I can't be 100% sure that the Thermocouple fixed it as no failures the day before .... but it seems likely as no failures since so I'm not going to remove it to find out.

Just thought I'd put this update on-line.

 

[BigBurner]

OK ... seems 'safe' to report update.
Day I made last update we had 12 shutdowns in a 24 Hr period ..... then ran 100% OK the next day ? ....
Anyway changed the flow thermocouple as it had arrived ....
Since then not one failure, more than 2 weeks .... and it's had a lot of use with this cold weather & Xmas.
I can't be 100% sure that the Thermocouple fixed it as no failures the day before .... but it seems likely as no failures since so I'm not going to remove it to find out.

Just thought I'd put this update on-line.

Thanks. Did you fit the seals as well?

 

[RickH]

got the seals ... but not fitted them yet.
Will have to remove front of burner box for annual service (and saftety cert) will change them then.

 

[gas4you]

BB, you're getting dangerous again now

Totally unqualified and incompetent person advising a member of the public to change gas safety parts himself

Really showing what a charlatan and buffoon you are again BB, Dr Drivel, Water Systems

 

[BigBurner]

BB, you're getting dangerous again now

Totally unqualified and incompetent person advising a member of the public to change gas safety parts himself

Really showing what a charlatan and buffoon you are again BB, Dr Drivel, Water Systems

Will the MOD please ban this abusive FOOL he adds no value or nothing constructive whatsoever.

 

[gas4you]

Oh contrare BB. I'm not going down the abusive route like others do with you. The likes of you are not worth lowering myself to.

There was not one abusive word in what I posted, only in your guilty mind.

Showing yourself up again for the fool you are with a grudge

If I can point out how unqualified, incompetent and a dangerous fool with a chip on his shoulder you are to just one poor unsuspecting DIYer, thereby possibly saving him from untold dangerous situations caused by your unqualified postings, then I feel proud to stand against your ramblings and I for one will continue until you are banned for the third time.

Can you understand that?

Better change your IP address again BB.

 

[BigBurner]

got the seals ... but not fitted them yet.
Will have to remove front of burner box for annual service (and saftety cert) will change them then.

Don't you mean the thermistors? I would have changed these as a matter of course when the pcb failed and needed replacing. But if a service man did that he would be accused of replacing parts needlessly. Thermistors can have intermittent problems. The Barcelona has so many problems that eventually the problems will be ironed out by parts replacement taking it up to Promax level (the same boiler).

Sorry there is a non-constructive, unhelpful, abusive fool who is trying to wreck your thread. Do not respond to them, as that is what they want.

 

[gas4you]

Sorry there is a non-constructive, unhelpful, abusive fool who is trying to wreck your thread.

Put another record on BB. You should be sorry for youself, no-one else.

Yet again nothing abusive has been said and is only a figment of your aged imagination. The same imagination that lets you think you know anything about gas, boilers and heating

If I had something constructive to say to help the OP I would, but unlike you, I freely admit I have never worked on a Bahama, but I do know enough that the main constructive advice I CAN give the OP is to ignore you, who will always pretend you have worked on boilers, therefore making your 'advice' (and I use that term very loosely) unqualified, illegal and dangerous.

Stick to googling your answers on another subject that wouldn't be dangerous, like flower arranging for instance

 

[RickH]

got the seals ... but not fitted them yet.
Will have to remove front of burner box for annual service (and safety cert) will change them then.

Don't you mean the thermistors? I would have changed these as a matter of course when the pcb failed and needed replacing. But if a service man did that he would be accused of replacing parts needlessly. Thermistors can have intermittent problems. The Barcelona has so many problems that eventually the problems will be ironed out by parts replacement taking it up to Promax level (the same boiler).

Sorry there is a non-constructive, unhelpful, abusive fool who is trying to wreck your thread. Do not respond to them, as that is what they want.

Yep ... I did of course mean Thermistor ... brain not engaged for typing.

I have the seals ready for the service - I do the work, but have a guy who is Corgi Registered comes along and has a look over .... and signs annual certificate.

.

 

[BigBurner]

I have the seals ready for the service - I do the work, but have a guy who is Corgi Registered comes along and has a look over .... and signs annual certificate.
.

Is the house rented out? If not, no need for an annual sign off. And the Nu-Heat thermal store, although pressurised, is not under G3, so no mandatory unvented annual check needed.

 

[RickH]

The house is not rented out - but I prefer to have a gas cert (it only costs me a coffee & biscuits) ...

I think they have to be in place should you sell.

 

[RickH]

Arrrrgh !!! it just failed again.
Had run for 4 weeks without one lockout, and just locked out again.

So far ...
Condensate water trap removed cleaned, water drain pipe confirmed clear
Changed logic board
Wiring harness changed
Reset ignitor gap - was slightly wide
Changed flow thermistor

Burner box seals look good, certianly all in place and do not look degraded (however I have a set to change them)

Suggestions ?