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Mend Saunier Duval ISOTWIN Central Heating Sludge Radiators

How to drain a Saunier DUVAL boiler and CH system?

How do i drain down a Saunier Duval central heating system? Also how do i refill it? What "chemicals" must i add?

The reason i ask is i suspect there may be sludge in the pipework/radiators and i wish to flush these out.

Any help will be greatly appreciated.

Nazir Letap
November 2008
Saunier DuvalSaunier Duval ISOTWINHeating, Home Heating SystemsCentral Heating Sludge Radiators
Drain it using several hand grenades obviously from a distance and refill it with unleaded after the dust has settled and light it up using yet another hand grenade.
should also eliminate any sludge problems

iain
November 2008
Just to add, its a combi boiler, the F30

Nazir Letap
November 2008

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Saunier Duval Boiler Draining & Refilling | Guide