In article ,
Derek * wrote:
Many years ago my father purchased a heat exchanger that screwed into
the immersion heater flange in a hot water cylinder. The device had
15mm connectors and was connected to the boiler circulator system
(which was pumped) to increase the heat transfer into the tank. I seem
to recall that it would dissipate something like 40kBtu. Can anyone
tell me if such devices are still available and, if possible, give me
names of suppliers or manufactures to search with?


I remember one such device that went into the immersion heater boss.
ISTR it being called or made by "Salamander".

Unfortunately (same company or not) there is a company called Salamander
Engineering which seems only to make water treatment products, but which
turns up unfailingly in Google searches.

ISTR a UK one called a 'Sidewinder'?

--
*If God had wanted me to touch my toes, he would have put them on my knees

Dave Plowman London SW
To e-mail, change noise into sound.

On Sun, 24 Apr 2005 12:17:37 +0100, Andy wrote:

Hi

Many years ago my father purchased a heat exchanger that screwed into the
immersion heater flange in a hot water cylinder. The device had 15mm connectors
and was connected to the boiler circulator system (which was pumped) to increase
the heat transfer into the tank. I seem to recall that it would dissipate
something like 40kBtu. Can anyone tell me if such devices are still available
and, if possible, give me names of suppliers or manufactures to search with?

Regards - Andy

hi andy,
they are called 'sidewinders' made by yorkshire heating
regards
bob

Andy wrote in message ...
On Sun, 24 Apr 2005 13:07:32 GMT, burbeck wrote:

they are called 'sidewinders' made by yorkshire heating

Hi

Thank you all very much for your responses. I've had a good 'google' with
the
information you provided but drawn a blank up to now. Seems like that
they're
probably not made any more.

Thanks again - Andy

http://www.yorkshirefittings.co.uk/d.../yorkshire.pdf

page 9

Andy wrote in message ...
Hi

Many years ago my father purchased a heat exchanger that screwed into the
immersion heater flange in a hot water cylinder. The device had 15mm
connectors
and was connected to the boiler circulator system (which was pumped) to
increase
the heat transfer into the tank. I seem to recall that it would dissipate
something like 40kBtu. Can anyone tell me if such devices are still
available
and, if possible, give me names of suppliers or manufactures to search
with?

Regards - Andy

One is called a sidewinder, but it does not fit into the immersion bosse
being an involved job to insert a standard coil into a cylinder cutting
holes in the cylinder. The one that does is the Micraversion, both made by
Yorkshire. There was a few other companies doing them, but demand for them
is small. They were made when indirect cylinders were expensive, which is
not the case today. I usually find it is cheaper to replace the whole
cylinder than mess with these. They are not that efficient. Best get a
quick recovery coil cylinder. Well worth it, as you could drop your fuel
bills and produce more hot water as they take all the boilers output.

With the 15mm connection Micraversion, make sure enough flow is through the
boiler.

I recall one being used with the cold water mains through to create an
instant high pressure shower. It didn't work too well as the coil is not
big enough. To get it to work near properly the temperature of the cylinder
had to be raised to 78C and a blending valve fitted on the DHW outlet to
lower tap water temp. May as well buy a purpose made shower coil cylinder
with a quick recovery coil and get proper performance all around.



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Hotspring conversion coil, converts direct cylinder to indirect. 22mm
=A3 61.83 list

Yorkshire Micraversion converts direct cylinder to indirect.400mm
=A383.74 list, 670mm =A389.23 list

I think these require drilling of the cylinder wall, rather than screw
into the immersion heater boss. All above ex-vat, available from City
Plumbing Supplies. However, IMHO a waste of time, you'd do better to
buy a whole new cylinder.

On Mon, 25 Apr 2005 18:23:04 +0100, Andy wrote:

On 25 Apr 2005 06:02:50 -0700, "Aidan" wrote:

you'd do better to buy a whole new cylinder.

Hi

Thanks again to all the posters for the excellent info and advice.

Yep, having done a bit more research when I've had chance today I'm coming to
the conclusion that a new tank is the answer. The tank I have is only a few
years old with an indirect coil and no immersion heater fitted. I was hoping
that I could use one of these devices to augment the existing heat exchanger and
boost the heat transfer in preparation for fitting a power or venturi shower
unit. I will likely have to remove the tank to fit the heater and a Surrey
flange anyway so a new tank is probably the best option.

One complication here is that replacing the hot water cylinder now comes
under building control, whereas modifying the existing probably doesn't.

Andy wrote in message ...
On Mon, 25 Apr 2005 13:25:35 +0100, "Doctor Evil"
wrote:

May as well buy a purpose made
shower coil cylinder
with a quick recovery coil and get
proper performance all around.

Hi

Is there any chance you could give me
an idea of the name of products I should
looking at?

http://www.rcmgroup.co.uk/mains_pres...ower/index.htm

The indirect version. Use a normal high pressure thermostatic shower mixer.
If the shower does not perform as well as you thought. Ramp up the cylinder
temperature and install a DHW blending valve on the draw-off. Comes with a
pressure reducing valve. Take the cold off this vale too. Will give a high
pressure shower without any pumps and minimal disruption.




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Andy wrote in message ...
On Tue, 26 Apr 2005 00:32:48 +0100, "Doctor Evil"
wrote:

http://www.rcmgroup.co.uk/mains_pres...ower/index.htm

Thank you. Excellent!

Andy

Best to say what you want to achieve, and any constraints, then a
solution(s) can be suggested.

Also get a cylinder, that is any cylinder you buy, with a thermostat probe.
This takes a rod type of cylinder stat, which senses the water temp from
inside the cylinder. Also get a quick recovery primary heating coil too. A
boiler of around 25kW will dump all its heat in the cylinder and be
re-heating as you draw-off hot water, extending the cylinder size in
essence.



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Andy wrote in message ...
On Tue, 26 Apr 2005 17:06:07 +0100, "Doctor Evil"
wrote:

I would go for the shower coil cylinder with a quick recovery coil,
snip
I would avoid pumps. Second option would be a venturi shower.

Yep, that's just about where I'm at now. If only I could get some info
back
from the likes of RMC and Telford I'd be able to get things moving. I'll
try
ringing a few manufactures or suppliers in the morning - they obviously
don't
like e-mail.

Telephone is the only way. The suppliers can at times give better deals than
the recommended prices.



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