tonyjeffs wrote:

-Quote-
What does this symbol mean: "-//-" ?
This is the siphon fill programme. When switching mains power on to
the boiler it will fire at a minimum output for up to 20 minutes. The
central heating function will be run at a minimum output during this
programme.
-unquote-

What is a siphon fill programme? Does that mean it's ok to leave it
running and it'll sort itself out after 20 minutes?

It's something to do with filling the condensate trap.

Ours does that if it's been off. Yes - let it run for 20 mins then it
should fire up normally.

Bloody annoying after a power cut on a cold morning....

--
Matt Balyuzi