"fred" wrote in message ...
In article , IMM abuse-
writes

If you slow the flow to promote a 30 degree rise I think
you
will get a low flow alarm from the boiler.

Modern condesning boilers have load compensation control that lowers the
return temp, by modulating the burner, to suit inside conditions.

Which would result in a failure to maintain a 30 degree uplift . . .

FYI, the keston will maintain full power where there is a low return temp,
but will flag a low flow alarm

Depends on how the software is programmed. Not all do it the same. Some
attempt to maintain the delta T and the lowest return temp as possible. Not
difficult.



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