In article ,
Dave Fawthrop wrote:
| It uses a conventional controller with pump but could be switched to
| manual in the case of another "Winter of Discontent"
|
| Please explain?

Maybe you are too young to remember the "winter of discontent" when we
had long power cuts c1976. Too much effort to explain as the whole lot
is for the bin.

Heh heh - I can well remember the 'Winter of Discontent' being one of the
very discontented workers - fed up to the back teeth with government
trying to control prices and incomes - but only partially succeeding in
controlling incomes for some - including me. While prices rocketed.

I was interested in how a pumped system could be switched to manual. A
hamster in a wheel to turn the pump?

--
*Sometimes I wake up grumpy; Other times I let him sleep.

Dave Plowman London SW
To e-mail, change noise into sound.