"Moonshine" wrote in message
...
It's that time of year when one's thoughts turn to the smoothe running of
ones
CH system (sad isn't it!)

Before I go into all the details I'd just like to get some expert opinion
on the
suitability of the the UPS 15-50 in my system.

The pump has been running for years on the medium setting, but I've always
been
concious that the system didn't seem to be running right.

The radiators were not piping hot to the touch, the house didn't feel warm
all
over, and the boiler does a lot of 1-2 minute cycling.

Turning to this group again over the last week or so for some tips, I've
treated
myself to an IR themometer to do some proper investigation.

As I say at the moment I won't go into all the figures, but the info
seemed to
sugest that the pump needed to be on maximum. I've been running it like
that for
a few days and things do seem to have improved regards balance of heat
even
running all the LSV's open until I'm sure what the state of play is.

My main concernes at the moment are I never see anywhere near 80 degrees C
at
the input to the radiators, the boilier is cutting out when the ouput has
reached this temp. The max input to closesest rad to pump is around 70
and the
lowest is around 65. And the Boiler is still short cycling.

So before I try and rectify anything balancing like crazy I want to know
if the
UPS 15-50 is powerful enough or not.

Cliff,

If this is microbore then a more powerful pumps appears the answer. Unless
there is sludge in the system blocking pipes. Did it ever work properly?
The boiler appears to be getting up to temp, so that appears to be working
fine.

Microbore requires generally a larger pump than a 15-50. A 15-50 generally
was not used on a house that large. Go for the next size up. and then do
your tests.



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