Has anyone tried one of these??
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The fan speed at start up doesn't change. It needs to be at a certain speed to ensure reliable ignition. Once the burner is properly lit and the flame well established, modulation can take place. Of course it would be really helpful if range rating a boiler afftected both the maximum and minimum as I could then set my boiler to 4kW -12kW instead of the current 10kW to 30kW (standard) nor 10kW to 12kW (top end rated down).If you do (range rate) the output to say 12kw, I wonder does the 50% fan start up then mean that the output is limited to 6.0 kw or is it 30/2 15.0 kw or 12kw?
It's not to bad a problem as the boiler's pump can be remapped in the settings to act as a fixed speed pump with six (yes, 6) speed settings.Good to see you understand that this is a problem.
Where do you get the 10 minutes from?The 10 minute delay to "full" firing, what determines this?
That's not saying that the boiler needs 10 minutes to reach max output. It's just telling the engineer to wait 10 minutes before carrying out a gas flow rate test. It's similar, but not exactly comparable, to letting a car warm up before doing an emissions test.I may have been looking at the CDI classic which says...Gas Flow rate- max 10 minutes after lighting.
It says the same for the CDI 35 model 47 311 94 & the CDI 40 model 47 311 95
You have quite a good understanding of your boiler sir , but its far to big for the 9kw of radiators connected to it , any good GSI should be able to down rate that boiler this will not affect the hotwater . KopThat's not saying that the boiler needs 10 minutes to reach max output. It's just telling the engineer to wait 10 minutes before carrying out a gas flow rate test. It's similar, but not exactly comparable, to letting a car warm up before doing an emissions test.
I have read that in the installation manual, but the Greenstar CDi Service booklet says this:You have quite a good understanding of your boiler sir , but its far to big for the 9kw of radiators connected to it , any good GSI should be able to down rate that boiler this will not affect the hotwater . Kop
That was quoting from memory; it's actually 84%.The current value is 82%
Thanks.it is a natural process the flue gases are mildly acidic would not have happened if boiler serviced regularly
not before the boiler is defunct, and not if you have it serviced regularly.Thanks.
So are the flue gases eating into the hex, which will eventually become perforated?
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