Firebird

[jenningstory]

Can any tell is it possible to de rate a firebird 35kw condenser boilerhouse to a 26kw by reducing the nozzle size and the air of the riello to the 26kw specifications. 

 

[steptoe]

why would you want to?  :C

 

[jenningstory]

why would you want to?  :C

Condenser boilers don't work properly wen the are to high powered for the size of the house and rads. 

 

[steptoe]

who told you that?

thats like saying a 3l car doesnt work if you only drive at 60mph,,,,,

 

[jenningstory]

who told you that?

thats like saying a 3l car doesnt work if you only drive at 60mph,,,,,

True. That is grand for a standard boiler. But but a condenser need an output of 70deg and a return of 50 for it to start condensing. With an over powered boiler it's wil be constantly going off and on to often to reach efficient condensing point. 

 

[ProDave]

The Riello burner manual that should have come with the boiler will list all the nozzle sizes and settings for different outputs.

To change the power you will need the new size nozzle, and oil pressure gauge, and a flue gas analyser.  I'm guessing you don't have those, so it's a job for an oil boiler specialst.

 

[Rob_the_rich]

boilers usually modulate their output down according to the demand, they sense the temperature of the returning water and adjust the rate accordingly. You haven't mentioned whether it is a combi boiler, some plumbers size combi boilers due to maximum hot water demand and not for the size of house or number of rads, knowing that the boiler will modulate down on heating.

The system might need balancing to obtain the 20degC temp differential.

As ProDave says, it is a specialist job to downrate the boiler, the pcb might also need changing.

 

[jenningstory]

The Riello burner manual that should have come with the boiler will list all the nozzle sizes and settings for different outputs.

To change the power you will need the new size nozzle, and oil pressure gauge, and a flue gas analyser.  I'm guessing you don't have those, so it's a job for an oil boiler specialst.

Yeah I was thinking that. Nozzle is reduced on the 26kw air intake is reduced. But out pressure stays the same according to the specs. Only difference in the boiler it self is the 26kw hold 19lt of water where as the 36kw is 24lt. So I think it's possible as long as I get it analysed afterwards. Thanks for the replies guy. It's just I'm getting a good deal off a friend. 

 

[jenningstory]

boilers usually modulate their output down according to the demand, they sense the temperature of the returning water and adjust the rate accordingly. You haven't mentioned whether it is a combi boiler, some plumbers size combi boilers due to maximum hot water demand and not for the size of house or number of rads, knowing that the boiler will modulate down on heating.

The system might need balancing to obtain the 20degC temp differential.

As ProDave says, it is a specialist job to downrate the boiler, the pcb might also need changing.

It's a none combi. I got a calculation for the rads nd cylinder for a 26kw. Just wondering should I buy the 36kw nd derate it. Cause I am saving a grand in buying new. 

 

[Rob_the_rich]

It's a none combi. I got a calculation for the rads nd cylinder for a 26kw. Just wondering should I buy the 36kw nd derate it. Cause I am saving a grand in buying new. 

I would speak with the installer and/or manufacturer, I don't know much about oil boilers, I work with natural gas ones. 1 grand is a lot of dosh though, euros or pounds.

 

[jenningstory]

I would speak with the installer and/or manufacturer, I don't know much about oil boilers, I work with natural gas ones. 1 grand is a lot of dosh though, euros or pounds.

Euros. I live on a small island. So I do the installation nd plumbing myself. But I will eventually need someone to analyse it. Just isn't as easy as picking up the Fone but I'm learning

 

[Rob_the_rich]

Build an extension?

 

[ProDave]

boilers usually modulate their output down according to the demand,

That might be true of gas boilers, but I have yet to see a modulating oil boiler.

 

[ProDave]

Yeah I was thinking that. Nozzle is reduced on the 26kw air intake is reduced. But out pressure stays the same according to the specs. Only difference in the boiler it self is the 26kw hold 19lt of water where as the 36kw is 24lt. So I think it's possible as long as I get it analysed afterwards. Thanks for the replies guy. It's just I'm getting a good deal off a friend. 

You could certainly try it with the new nozle. I believe there are some markings to get the air intake very approcimately right as a starting point. you might find in practice with the smaller nozzle the oil pressure increases without making any adjustments.

Without setting up the burner properly it won't burn efficciently, just watch out it's not burning sooty.

Where abouts are you. Is "Tory Island" it's real name (if so I have no idea where that is) or just a local joke?

 

[Rob_the_rich]

That might be true of gas boilers, but I have yet to see a modulating oil boiler.

Well, that might explain why I couldn't find a minimum boiler output in the manual I found on the web ( http://www.heatandplumb.com/brochure_downloads/firebird/ENVIROMAX-MANUAL.pdf )

Also found Tory Island on the web, it has a King.

 

[jenningstory]

Well, that might explain why I couldn't find a minimum boiler output in the manual I found on the web ( http://www.heatandplumb.com/brochure_downloads/firebird/ENVIROMAX-MANUAL.pdf )

Also found Tory Island on the web, it has a King.

Yup the only king in Ireland. Since the riellos are the same. bar the setting nd nozzle. I think I will chance it nd achieve condensing sumhow 😊

 

[ProDave]

Make a note of the old air intake settings so you can always go back to the old settings and old nozzle if it doesn't work.

 

[jenningstory]

Make a note of the old air intake settings so you can always go back to the old settings and old nozzle if it doesn't work.

Cheers il try that.