Graham C wrote:
Looking for an inexpensive run-on timer, which will keep my CH pump
active for about two minutes after the boiler has switched off. I'm
currently experiencing problems when the whole system stops just as
the boiler has reached its setpoint.

Several cheap timers around with 30 seconds max, others with a £90
price tag. Another option is to by a £25 pound bathroom extractor fan
(with timer), and throw the fan away- hardly ideal.

Not ready yet to fit a modern boiler with all its advantages!

A twenty minute Google was not very fruitful.

TIA

GrahamC

Graham, you can use a Manrose 1351 bathroom extractor fan timer. We will
be publishing a wiring diagram for this application on the wiki in the
next day or so. Watch out here for the announcement from me or John Rumm.

I'm told this is the Manrose 1351 although it doesn't say so anywhere in
the description: -

http://www.tlc-direct.co.uk/Products/BGDT20.html

Cheers,
DaveyOz

In an earlier contribution to this discussion,
Dave Osborne wrote:


Graham, you can use a Manrose 1351 bathroom extractor fan timer. We
will be publishing a wiring diagram for this application on the wiki
in the next day or so. Watch out here for the announcement from me or
John Rumm.
I'm told this is the Manrose 1351 although it doesn't say so anywhere
in the description: -

http://www.tlc-direct.co.uk/Products/BGDT20.html

Cheers,
DaveyOz

Indeed - I use one of these for just this purpose. It's slightly fiddly to
adjust the delay - a little to screw to turn, covering a range of 1-45 (or
is it 60?) minutes. It's best to adjust it on the bench, switching (say) a
light bulb off - and fiddle until you get the desired delay. It seems fairly
consistent once set. Mine is set to about 4 minutes - which seems to be
enough to stop the boiler overheating under the circumstances which the OP
described.
--
Cheers,
Roger
______
Email address maintained for newsgroup use only, and not regularly
monitored.. Messages sent to it may not be read for several weeks.
PLEASE REPLY TO NEWSGROUP!

In an earlier contribution to this discussion,
Roger Mills wrote:

In an earlier contribution to this discussion,
Dave Osborne wrote:


Graham, you can use a Manrose 1351 bathroom extractor fan timer. We
will be publishing a wiring diagram for this application on the wiki
in the next day or so. Watch out here for the announcement from me or
John Rumm.
I'm told this is the Manrose 1351 although it doesn't say so anywhere
in the description: -

http://www.tlc-direct.co.uk/Products/BGDT20.html

Cheers,
DaveyOz

Indeed - I use one of these for just this purpose. It's slightly
fiddly to adjust the delay - a little to screw to turn, covering a
range of 1-45 (or is it 60?) minutes. It's best to adjust it on the
bench, switching (say) a light bulb off - and fiddle until you get
the desired delay. It seems fairly consistent once set. Mine is set
to about 4 minutes - which seems to be enough to stop the boiler
overheating under the circumstances which the OP described.


An afterthought for Graham. . . . If the pump keeps going after the boiler
stops, the water *does* have somewhere to go, doesn't it? This is not always
the case! For example, on S-Plan systems, the motorised valves will all be
closed in these circumstances, so there needs to be a bi-pass circuit -
preferably using an automatic bi-pass valve.
--
Cheers,
Roger
______
Email address maintained for newsgroup use only, and not regularly
monitored.. Messages sent to it may not be read for several weeks.
PLEASE REPLY TO NEWSGROUP!

In article ,
Dave Osborne writes:
Graham C wrote:
Looking for an inexpensive run-on timer, which will keep my CH pump
active for about two minutes after the boiler has switched off. I'm
currently experiencing problems when the whole system stops just as
the boiler has reached its setpoint.

Several cheap timers around with 30 seconds max, others with a £90
price tag. Another option is to by a £25 pound bathroom extractor fan
(with timer), and throw the fan away- hardly ideal.

Not ready yet to fit a modern boiler with all its advantages!

A twenty minute Google was not very fruitful.

TIA

GrahamC

Graham, you can use a Manrose 1351 bathroom extractor fan timer. We will

There's a Deta one here, £5.32
http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=220523396951

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]