Avanta Plus 35c - Ionisation Current Display (FL)

[BMikey]

I have a recently serviced combi type Avanta Plus 35c boiler using natural gas.

What values should I expect to see on the ionisation read-out (FL) for heating at these points:

a) starting (nf=13),

b) max fan speed (nf=35),

c) fan speed (nf=19) when max flow temp achieved E1=55 with return temp E2=48?


My read out shows a) 4.1 b) 9.3/9.4 c)9.1/9.2

 

[D_Hailsham]

Manufacturer specifies a maximum of 9 at full output.

The engineer who serviced the boiler should have seen to this - (check ignition element and adjust gas valve).

Get the engineer back.

PS There may be something wrong if you only have a 7 degree temperature difference. It should be about 15

 

[BMikey]

Thanks - when you advise 'there may be something wrong' with a 7 deg temp difference rather than an expected 15 is this a boiler issue or under-sizing of the radiators & therefore the output from them?

 

[simond]

I think D_H is a bit rich saying get the chap back. He's not exactly qualified to offer that advice.....are you, D_H?

 

[Gas2Air]

I have a recently serviced combi type Avanta Plus 35c boiler using natural gas.

What values should I expect to see on the ionisation read-out (FL) for heating at these points:

a) starting (nf=13),

b) max fan speed (nf=35),

c) fan speed (nf=19) when max flow temp achieved E1=55 with return temp E2=48?


My read out shows a) 4.1 b) 9.3/9.4 c)9.1/9.2

 

[Gas2Air]

Why are you so bothered? From memory any lower than 3Ua and above 9Ua needs attention.

 

[simond]

Yes, every day is a bonus with an Avanta.

D_H bought one, his advice is well worth following.

 

[D_Hailsham]

Why are you so bothered? From memory any lower than 3Ua and above 9Ua needs attention.

Your memory is correct.

I work on the assumption that if the manufacturer specifies that a parameter should be between x and y, they have a good reason for saying this. So the service engineer has a responsibility for ensuring that the boiler meets the specification.

One of the things the manufacturer says should be checked if the ionisation current is the O2/CO2 ratio. I do hope no professional would say the O2/CO2 ratio was unimportant.

As for the negative comments about the Avanta boiler, I do not understand them. I have had mine for four years without any problem and I know of another which has been in over five years without any problems.

 

[D_Hailsham]

Thanks - when you advise 'there may be something wrong' with a 7 deg temp difference rather than an expected 15 is this a boiler issue or under-sizing of the radiators & therefore the output from them?

Ignore that comment. You have a combi boiler.

 

[Agile]

Since ionisation current is a feature of gas/combustion then in my view this question should not have been asked here and should definitely not have been answered.

Its a thread which should be deleted by mods in my opinion.

If the OP is gas registered he should sign up to the Combustion Chamber part of this site where he can ask gas related questions.

He can expect to get a bit of micky taking over his apparent lack of experience of differential temperatures though.

Tony

 

[D_Hailsham]

Since ionisation current is a feature of gas/combustion then in my view this question should not have been asked here and should definitely not have been answered.

The OP says that they "have a recently serviced combi type Avanta Plus 35c boiler", NOT that they have recently serviced a combi etc. The difference may be subtle, but it infers that the writer is a customer, not an installer, asking the question.

You seem to be suggesting that all boiler related questions should be banned (including the perennial "which boiler"??). If so, who does someone ask if they think something may be wrong with their boiler? After all the problem may not be in the boiler.

 

[Aquaheat]

You seem to be suggesting that all boiler related questions should be banned (including the perennial "which boiler"??). If so, who does someone ask if they think something may be wrong with their boiler? After all the problem may not be in the boiler.

If they think they have a problem specifically with their boiler the they call an RGI.

If there is a problem with the heating system in general then by all means ask the question.

If the answer started to lead to a boiler issue then call an RGI

If in any doubt then call a heating engineer who has knowledge not only of boilers but the rest of the system and it's possible controls. Most of us on here can sort systems out but there are a few that purely specialise in boilers and gas only.

Jon

 

[Steelmasons]

One of the things the manufacturer says should be checked if the ionisation current is the O2/CO2 ratio. I do hope no professional would say the O2/CO2 ratio was unimportant.

O2/CO2 ratio?? ...it appears that you're a tad confused regarding the terminology used when carrying out FGA's Mr Hailsham?

 

[Steelmasons]

Since ionisation current is a feature of gas/combustion then in my view this question should not have been asked here and should definitely not have been answered.

Its a thread which should be deleted by mods in my opinion.

Why?
Ionisation/flame rectification isn't only applicable to boilers.
Working in the gas industry and being gas registered (not sure you renewed) doesn't put you a cut above the rest .....nor does it give you the right to be arogant and pompous towards others.
Someone I know is not gas registered and never has been , he would wipe the floor with most RGI's.