F
frpcraig
Hi All,great forum ,hope you can help?
I have an old camray compact 50/70 oil boiler, with a rdl g2-sx burner.
It has been serviced every 2 years by the same guy.
The time for the service seemed to be short so I did some investigating myself.
I removed the burner and hacked off 1/4 inch of carbon build up in the chamber.
He hoovered it each time?
The end result is now the rads/hot water now heat up much more quickly and reach a decent temp.
The down side is the boiler now short cycles.££££££!
The boiler runs 11 rads and a hot water tank.
If I put on only the hot water there is no short cycling.
I have replaced a defective roomstat and a defective 2 way motorised valve.
The system appears basic to say the least.
There is only one motorised valve to switch off the ch and a tap to isolate the hw tank (with no tank stat)
The boiler will run for a while until it reaches temp then cycle 3 mins on 3 mins off when asked for ch and hw.
The oil pump runs standard as far as I know and the nozzle is 0.65 60 W.
Do you think running the max size nozzle is causing the short cycling and I should drop down to a 0.40 nozzle to keep the burner on for longer.
With the same set up it seemed to run ok before I cleaned the chamber properly, is the boiler oversize??
Many thanks,
I have an old camray compact 50/70 oil boiler, with a rdl g2-sx burner.
It has been serviced every 2 years by the same guy.
The time for the service seemed to be short so I did some investigating myself.
I removed the burner and hacked off 1/4 inch of carbon build up in the chamber.
He hoovered it each time?
The end result is now the rads/hot water now heat up much more quickly and reach a decent temp.
The down side is the boiler now short cycles.££££££!
The boiler runs 11 rads and a hot water tank.
If I put on only the hot water there is no short cycling.
I have replaced a defective roomstat and a defective 2 way motorised valve.
The system appears basic to say the least.
There is only one motorised valve to switch off the ch and a tap to isolate the hw tank (with no tank stat)
The boiler will run for a while until it reaches temp then cycle 3 mins on 3 mins off when asked for ch and hw.
The oil pump runs standard as far as I know and the nozzle is 0.65 60 W.
Do you think running the max size nozzle is causing the short cycling and I should drop down to a 0.40 nozzle to keep the burner on for longer.
With the same set up it seemed to run ok before I cleaned the chamber properly, is the boiler oversize??
Many thanks,