My father in law is away from his home for a while and I decided to reduce
his house central heating ON/OFF times during this period. Currently he has
it running ON day and night, HW & CH...........

I now have both water and heating coming on for 1/2 hours morning and
evening just to keep it ticking over. Even though the system is OFF with
boiler definitely shut down, the pump still runs. It is not running water
around the CH system but just circulating it around the local HW tank
pipework but not via the boiler.

It is a Sentinel Housing property and the heating system was
installed/upgraded a couple of years ago to bring it up to current standards
and legislation.

So is this the modern way, with the pump continually running.

thanks
dj

In article ,
   tpow  wrote:
> My father in law is away from his home for a while and I decided to
> reduce his house central heating ON/OFF times during this period.
> Currently he has it running ON day and night, HW & CH...........

> I now have both water and heating coming on for 1/2 hours morning and
> evening just to keep it ticking over.

Why? It's pointless heating an empty house - or the water.

> Even though the system is OFF with boiler definitely shut down, the pump
> still runs. It is not running water around the CH system but just
> circulating it around the local HW tank pipework but not via the boiler.

Sounds like a bodge, or the microswitch in the 3 way valve has failed, or
the valve stuck.

> It is a Sentinel Housing property and the heating system was
> installed/upgraded a couple of years ago to bring it up to current
> standards and legislation.

> So is this the modern way, with the pump continually running.

No. My ultra sophisticated ;-) new boiler runs the pump for a short time
every 24 hours even when set to standby (only frost protection, no heating
or hot water)  to prevent it seizing up. Anything else is just wasting
power.

-- 
*The more people I meet, the more I like my dog.

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

On Sun, 6 Jul 2008 09:37:01 +0100 someone who may be "tpow"
 wrote this:-

>I now have both water and heating coming on for 1/2 hours morning and
>evening just to keep it ticking over. Even though the system is OFF with
>boiler definitely shut down, the pump still runs. It is not running water
>around the CH system but just circulating it around the local HW tank
>pipework but not via the boiler.
>
>It is a Sentinel Housing property and the heating system was
>installed/upgraded a couple of years ago to bring it up to current standards
>and legislation.

Possibly not. If the pump is running continuously then they have
failed the economy of operation tests.

However, the fact that the boiler is not firing does not mean that
the pump will not run. The pump is likely to run for a while after
the boiler goes off. How long "a while" is depends on the system,
the installation and the conditions. Something up to 20 minutes
should cover the majority of installations, but not all.

How do you know that the water is being circulated round the
cylinder, but not the boiler? Is there some sort of mixing valve?
Having gone through the coil in the cylinder where does the water
go?



-- 
  David Hansen, Edinburgh 
 I will *always* explain revoked encryption keys, unless RIP prevents me
 http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

"David Hansen"  wrote in message 
news:rt1174l6g6u42dqde40520ravr5m54s5rj@4ax.com...
> On Sun, 6 Jul 2008 09:37:01 +0100 someone who may be "tpow"
>  wrote this:-
>
>>I now have both water and heating coming on for 1/2 hours morning and
>>evening just to keep it ticking over. Even though the system is OFF with
>>boiler definitely shut down, the pump still runs. It is not running water
>>around the CH system but just circulating it around the local HW tank
>>pipework but not via the boiler.
>>
>>It is a Sentinel Housing property and the heating system was
>>installed/upgraded a couple of years ago to bring it up to current 
>>standards
>>and legislation.
>
> Possibly not. If the pump is running continuously then they have
> failed the economy of operation tests.
>
> However, the fact that the boiler is not firing does not mean that
> the pump will not run. The pump is likely to run for a while after
> the boiler goes off. How long "a while" is depends on the system,
> the installation and the conditions. Something up to 20 minutes
> should cover the majority of installations, but not all.
>
> How do you know that the water is being circulated round the
> cylinder, but not the boiler? Is there some sort of mixing valve?
> Having gone through the coil in the cylinder where does the water
> go?
>
>
>
> -- 
>  David Hansen, Edinburgh
> I will *always* explain revoked encryption keys, unless RIP prevents me
> http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54
>

All components are located in the airing cupboard, control, pump, 3w valve, 
expansion tank and an anti fur device around one pip etc.

The pump is running all day all night...........well it is running whenever 
I leave the property and return at any time.

3 Way seems to be working OK not stuck.

The pipes local to the tank are hot. No other pipework leaving the airing 
cupboard is hot.

regs
dj

In an earlier contribution to this discussion,
tpow   wrote:

> My father in law is away from his home for a while and I decided to
> reduce his house central heating ON/OFF times during this period.
> Currently he has it running ON day and night, HW & CH...........
>
> I now have both water and heating coming on for 1/2 hours morning and
> evening just to keep it ticking over. Even though the system is OFF
> with boiler definitely shut down, the pump still runs. It is not
> running water around the CH system but just circulating it around the
> local HW tank pipework but not via the boiler.
>
> It is a Sentinel Housing property and the heating system was
> installed/upgraded a couple of years ago to bring it up to current
> standards and legislation.
>
> So is this the modern way, with the pump continually running.
>
> thanks
> dj

Are you sure that it's the central pump which is running, and not a separate 
pump which is circulating hot water round the hot taps so that they run hot 
as soon as you open them?
-- 
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!

"Roger Mills"  wrote in message 
news:6dbh59F1lg65U1@mid.individual.net...
> In an earlier contribution to this discussion,
> tpow   wrote:
>
>> My father in law is away from his home for a while and I decided to
>> reduce his house central heating ON/OFF times during this period.
>> Currently he has it running ON day and night, HW & CH...........
>>
>> I now have both water and heating coming on for 1/2 hours morning and
>> evening just to keep it ticking over. Even though the system is OFF
>> with boiler definitely shut down, the pump still runs. It is not
>> running water around the CH system but just circulating it around the
>> local HW tank pipework but not via the boiler.
>>
>> It is a Sentinel Housing property and the heating system was
>> installed/upgraded a couple of years ago to bring it up to current
>> standards and legislation.
>>
>> So is this the modern way, with the pump continually running.
>>
>> thanks
>> dj
>
> Are you sure that it's the central pump which is running, and not a 
> separate pump which is circulating hot water round the hot taps so that 
> they run hot as soon as you open them?
> -- 
> 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!
>
>

now that could be a valid point. It is a single level accommodation 
(bungalow) and there would not be enough gravity head to supply hot water to 
the taps.............hmmmmmm a thought.

In article ,
	"tpow"  writes:
> My father in law is away from his home for a while and I decided to reduce
> his house central heating ON/OFF times during this period. Currently he has
> it running ON day and night, HW & CH...........

I would turn off the HW, turn on the CH continuously and set the room
stat to 10C. That way nothing should come on unless it gets quite cold.
If it's an old house, 10C might be too low to stop it smelling damp,
in which case increase it up by experimentation.

> I now have both water and heating coming on for 1/2 hours morning and
> evening just to keep it ticking over. Even though the system is OFF with
> boiler definitely shut down, the pump still runs. It is not running water
> around the CH system but just circulating it around the local HW tank
> pipework but not via the boiler.
> 
> It is a Sentinel Housing property and the heating system was
> installed/upgraded a couple of years ago to bring it up to current standards
> and legislation.
> 
> So is this the modern way, with the pump continually running.

As others have said, no.
Does the house have a roomstat anywhere?
Also, do the radiators have thermostatic valves fitted?

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

In article ,
	"Dave Plowman (News)"  writes:
> No. My ultra sophisticated ;-) new boiler runs the pump for a short time
> every 24 hours even when set to standby (only frost protection, no heating
> or hot water)  to prevent it seizing up. Anything else is just wasting
> power.

My Keston C25 allegedly does this too, although I've never noticed it.
The mid-position valve is under the control of my home automation system,
this operates it once every 24 hours if it hasn't needed to do so as
part of the heating operation. (It selects between upstairs and downstairs
heating zones in my case, not HW and CH.)

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

"Roger Mills"  wrote in message 
news:6dbh59F1lg65U1@mid.individual.net...


> Are you sure that it's the central pump which is running, and not a 
> separate pump which is circulating hot water round the hot taps so that 
> they run hot as soon as you open them?

That would be silly.
It would be cheaper to fit electric storage heaters next to each tap.

On Sun, 6 Jul 2008 10:19:53 +0100 someone who may be "tpow"
 wrote this:-

>The pump is running all day all night...........well it is running whenever 
>I leave the property and return at any time.

Where is the pump pumping the water round? From the descriptions it
sounds like the pump is pumping water through the valve and then
through the cylinder. After it comes out of the cylinder how does
the water get back to the pump inlet without going through the
boiler?



-- 
  David Hansen, Edinburgh 
 I will *always* explain revoked encryption keys, unless RIP prevents me
 http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

In message , tpow 
 writes
>My father in law is away from his home for a while and I decided to reduce
>his house central heating ON/OFF times during this period. Currently he has
>it running ON day and night, HW & CH...........
>
>I now have both water and heating coming on for 1/2 hours morning and
>evening just to keep it ticking over. Even though the system is OFF with
>boiler definitely shut down, the pump still runs. It is not running water
>around the CH system but just circulating it around the local HW tank
>pipework but not via the boiler.
>
>It is a Sentinel Housing property and the heating system was
>installed/upgraded a couple of years ago to bring it up to current standards
>and legislation.
>
>So is this the modern way, with the pump continually running.
>
Who knows, you haven't said what make and model of boiler

why do you want DHW and CH in an empty house in the summer ?


-- 
geoff

In message <48709f10$0$78075$5a6aecb4@news.aaisp.net.uk>, Andrew Gabriel 
 writes
>> So is this the modern way, with the pump continually running.
>
>As others have said, no.
>Does the house have a roomstat anywhere?
>Also, do the radiators have thermostatic valves fitted?
>
Or is it e.g. a Baxi Solo 2/3 in it's favourite failure mode ?

-- 
geoff

"tpow"  wrote in message 
news:TdmdnYhmALOzGe3VnZ2dneKdnZydnZ2d@bt.com...
> My father in law is away from his home for a while and I decided to reduce
> his house central heating ON/OFF times during this period. Currently he 
> has
> it running ON day and night, HW & CH...........
>
> I now have both water and heating coming on for 1/2 hours morning and
> evening just to keep it ticking over. Even though the system is OFF with
> boiler definitely shut down, the pump still runs. It is not running water
> around the CH system but just circulating it around the local HW tank
> pipework but not via the boiler.
>
> It is a Sentinel Housing property and the heating system was
> installed/upgraded a couple of years ago to bring it up to current 
> standards
> and legislation.
>
> So is this the modern way, with the pump continually running.
>
> thanks
> dj
>
>
>

Going to have Sentinels heating engineers take a look..............