On Tue, 09 Dec 2003 10:11:27 +0000, Moonshine wrote:

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.


The next size up will fit withoput modification, also the maximum setting
is pretty much the required going rate on microbore systems.

Check that the boiler is delivering at 80+ C. Which is what you should get
when turned on all the way.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html