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Saunier duval boiler. Type sd 620 f?

How do you empty system? How come radiators are half hot and cold, how can solve this? Is there any manuals for this system? Where can get hold of it ?

Nick power
November 2010
Saunier DuvalHeating, Home Heating SystemsDuval Sd F
What type of boiler is the sd620f , I have one in my flat and it is boxed in, I think the vent must be in the loft space and then goes out.
Does that mean there is a tank and pump up there as well?
My shower has never been hot, and I have to reduce the flow rate to have a warmish shower, with not much power, what is the problem?

Zahra
November 2011
old boiler. no draincock on it, should be one on system, if not buy a washing machine self cutting tap and fit
rads if hot at bottom cold at top = air (bled)
rads if hot at top cold at bottom = circulation problems. pump-sludge-divertor valve part jammed

deano
November 2010

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