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Worcester Danesmoor 15/19 air setting won't go high enough!
View the thread, titled "Worcester Danesmoor 15/19 air setting won't go high enough!" which is posted in Air Sourced Heat Pumps Advice Forum on UK Plumbers Forums.
A lot of them Riello RDB air adjusters slip on the thread of the bolt. Or the Allen bolt end can wear. The little sliding internal air door can also jam. You can usually adjust the bolt manually if it is slipping on the door thread by removing the plastic air cover or snorkel spigot (whichever it fitted) and turning thread by hand. Obviously turn the power off first.
Once again thanks for taking the time to reply.
I removed the burner, took the blast tube off, removed the back cover, pulled the door manually open and wound the bolt at the same time. Without the pressure of the door against it I could move the bolt ok. As it happens it needed to be set at about 5 to get the correct 11.5 co2 reading, nowhere near the 9 the MI suggests!
I removed the burner, took the blast tube off, removed the back cover, pulled the door manually open and wound the bolt at the same time. Without the pressure of the door against it I could move the bolt ok. As it happens it needed to be set at about 5 to get the correct 11.5 co2 reading, nowhere near the 9 the MI suggests!
It is a guide for start up I guess on the air setting number and fgt, - other readings are normally the factory settings - like oil pressure & correct nozzle for output. Obviously other settings are on MIs for lowering & highering output & different size nozzles.
They always state that air setting needs adjusted by analyser for commissioning.
Just be careful trying to obey recommended CO2 as it can vary on what temperature the air is that the boiler draws in. On a cold day the CO2 lowers for example but if you checked the CO2 on a day that is 20degrees you would find it should be tested & set to MIs. On really hot weather it will be higher
I realise it is only a guide, and was always going to set the air damper according to what the analyser co2 readings said. I was using the approx air setting as a starting point then adjusting it down according to the analyser, kind of how you explained in another post!
If thats the case with different temperatures how is it possible to set up a boiler correctly if its border line freezing or a heatwave outside?
Sorry for all the questions, i'm a little green! I've been installing oil boilers for 15 years but have never delved inside them too much, I watched other technicians many many times but it's a bit different doing it yourself when you come up against problems!
Last nights boiler was the father in laws. Its due to be replaced in a couple of months so I said I'd give it a service for him and use it as experience for myself. He said the last engineer only took 15 minutes to service it where as I was over two hours..........clearly wasn't being done correctly!
If thats the case with different temperatures how is it possible to set up a boiler correctly if its border line freezing or a heatwave outside?
Sorry for all the questions, i'm a little green! I've been installing oil boilers for 15 years but have never delved inside them too much, I watched other technicians many many times but it's a bit different doing it yourself when you come up against problems!
Last nights boiler was the father in laws. Its due to be replaced in a couple of months so I said I'd give it a service for him and use it as experience for myself. He said the last engineer only took 15 minutes to service it where as I was over two hours..........clearly wasn't being done correctly!
The analyser will also take the air temperature at boiler. This will then let you work out if the CO2 needs slightly higher or lower than the MIs. Only problem I see with analyser doing this, is some boilers haven't balanced flues and therefore you need the air temperature to be taken beside boiler, but a balanced flue takes its air from outside, so air temperature needs from there. It's a bit of guesswork also. Do not try to get all boilers to MIs CO2 as this can be wrong. For example some say 12%, but that can be too close to limits and maybe better to lower it to just above 11%. Actual locations of boiler and height of flue with have different considerations.
Also a standard efficient oil boiler can cause the chimney/flue to get wet if set to MIs.
Also a standard efficient oil boiler can cause the chimney/flue to get wet if set to MIs.
With that in mind, at what temperatures do you start adjusting the co2 levels and by how much(say 10c lower by 1% and 20c raise by 1%)? I guess you could also use the analyser to read the temperature of where the air source is before inserting into the flue.
How does this stand with the warranty also? I could imagine a manufacturer trying to worm out of a warranty claim because the co2 level was set wrong at the last service?!
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The manufacturer can't argue with a printout from analyser showing the air temperature as well as boiler gases result
Here it is, (just cut & paste it to your post) -
http://www.rielloburners.co.uk/lumo/upload_documents/riello_combustionairadjustmentco2outsideair.pdf
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