asalcedo wrote:
'Bruce[_4_ Wrote:
;2036701']asalcedo wrote:-
Any more ideas?-
Could it be a form of water hammer?
No, it does not seem to be water hammer at all. Water hammer, according
to Wikipedia, is a pressure surge or wave resulting when a fluid in
motion is forced to stop or change direction suddenly (momentum
change). Water hammer commonly occurs when a valve is closed suddenly
at an end of a pipeline system, and a pressure wave propagates in the
pipe.
In my case there is no valve being closed. In fact, when the radiator
valve is closed all noise ends.
I have put my ear against the boiler while the pump is working and I
can hear the same noise. There seems to be also a fan working at the
same time as the pump is.
I strongly believe now that the noise at the radiators is the pump/fan
noise.
It seems that these new boilers work with a higher pump speed which
leads to higher water flow.
According to Worcester tech support there is no way to lower the pump
speed in my boilers (which are supposed to be good quality and
expensive ones).
I am willing to change the boilers.
Are there other good quality boilers that will not give me the same
problem. Perhaps by allowing a reduced pump speed when needed?
Would a plate heat exchanger, with the same boilers solve this
problem?
If so, what does it entail to have a plate heat exchanger installed?
Thanks,
Antonio
The WB documentation states:
"Variable pump speed* Automatically adjusts to meet system flow demand"
So while the pump speed may not be manually adjusted, it is supposed to
adjust itself automatically.
Therefore I suggest you try adjusting the temperature control upwards -
higher temperature should reduce the systems' pumping requirements -
hence reducing pump speed. At least that is how it appears to me.
Of course, this might mean the boiles do not condense so effectively and
will run less efficiently. But compared with the cost of replacing them,
this would almost certainly be marginal.
If anyone wishes to add/subtract from this feel welcome - I am no expert.
--
Rod
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