On 7 Feb, 15:32, Mike Tullett
wrote:
On 7 Feb 2007 00:25:56 -0800, Steve J wrote in
roups.com

With an overnight minimum temperature of -5.6C, we have had our
coldest February night since 1991 (-7.8C) in Coventry; it went down to
-10.9C on the ground.

In rural Warwickshire it was -8C at Church Lawford, and we had lying
snow at Hatton, near Warwick. A real wintry scene at last!

It was about -6C here, the coldest in quite a number of years, but not sure
how long. What caught me out was my central heating tank and associated
feed pipes outside. The oil had thickened to such a degree that it didn't
flow when the heating was meant to come on this morning. It took until
near noon to thaw enough.

Does anyone have an idea of the temperature at which 28 sec oil gets too
viscous to flow?

--
Mike Tullett - Coleraine 55.13°N 6.69°W posted 07/02/2007 15:32:04 GMT

Hi, Mike,

Sounds like you have some moisture in the pipes. I've not heard of it
freezing up in this area. Mine is on 24 hours and governed by
thermostats etc so there is a regular flow of oil through the feed
pipe. Some of the flow is caused by "dry cycling" just to keep the
boiler up to heat but it keeps the house warm and the system ticking
over. It is much more practical in a cold climate as is keeping the
solid fuel back boiler on low all night.

Ken
Copley 253metres, nr Barnard Castle, Teesdale, County Durham
http://copley/mysite.orange.co.uk