Running a calorifier from a Lister JP2

[Vickyviki]

My husband is in the process of setting up a Lister JP2 engine in a 57`
narrowboat. The engine is a marine engine, not a marinised truck engine. We
have been told that you cannot run a calorifier for hot water from a Lister
engine.

Can anyone help with any advice as to whether or not this is possible?

Many thanks

Geoff & Diane Knee

[Peter Forbes]

Can't think of a good reason why not, except that without a thermostat
the engine may run too cold if over-cooled. A thermostatic diverter
valve would be useful, keeping the calorifer as the main cooling path
until really warmed up, then cutting in the other cooling system
gradually as the temp rises.

Other than a bried mention of sea-water cooling, the JPM and JKM books
do not say much at all on the subject.

Like the idea of a JP2 in a truck ! :-))

Andy Clarke or Peter Thompson would be the guys to talk to, Andy posts
here so will read this and hopefully comment ?

Peter

Peter & Rita Forbes
email:- die...@easynet.co.uk
Lister Cold-Starting Diesel Engines
Engine info etc at:-
http://www.oldengine.org/members/diesel

--
Peter & Rita Forbes
email:- die...@easynet.co.uk
Lister Cold-Starting Diesel Engines
Engine info etc at:-
http://www.oldengine.org/members/diesel

[Julian]

In article <20000703141027...@nso-md.aol.com>, Vickyviki
<vick...@aol.com> writes

>My husband is in the process of setting up a Lister JP2 engine in a 57`
>narrowboat. The engine is a marine engine, not a marinised truck engine. We
>have been told that you cannot run a calorifier for hot water from a Lister
>engine.
>
>Can anyone help with any advice as to whether or not this is possible?
>

Yes it is possible provided that you have set the engine to be skin tank
cooled and not to be raw water cooled.
The only problem is that without a thermostat the engine doesn't get
that hot, my JP3 gets to about 55C and that only on a river.
Tony Redshaw at Hillmorton on the Nth Oxford canal makes thermostats for
the JP range.
The other thing you will have to watch is the water pump if you have the
original JP water pump it can generate quite a high pressure so the
calorifier will have to be able to stand that.

Julian Tether
Nb Idleness
e-mail:jul...@idleness.co.uk

[Peter Hirons]

Peter Forbes wrote:

> Can't think of a good reason why not, except that without a thermostat
> the engine may run too cold if over-cooled. A thermostatic diverter
> valve would be useful, keeping the calorifer as the main cooling path
> until really warmed up, then cutting in the other cooling system
> gradually as the temp rises.
>

I don't think that's likely as most JP2s or 3s I've seen have had straight
through cooling. Over-cooling constantly! I'm not sure how the water
pump would react to a pressurised system though - mine used to leak most
of the time! I'd be inclined to provide a vent to keep the system at low
pressure and a means to switch to direct canal water cooling if things get
too hot.

Peter

[Peter Forbes]

There is nothing stopping you using the JP as a tank-cooled engine, just
leave off the water pump and provide a decent head of water to encourage
thermo-syphoning.

The basic engine was used like that industrially over donkeys years
without any problems, or water pumps.

All jesting aside :-) it is very important to run the engine at a decent
water temperature, especially in a variable speed/load environment such
as a boat.

My personal view would be as originally posted but maybe delete the pump
and try it out with the calorifer as the prime circuit (as long as there
is water head for circulation) and a gate valve to bring in the skin
tank or whatever. Raw water cooling is probably too much of a good thing
in a cruising situation. Running two fully loaded boats against the tide
would be a different matter !

Peter

Peter & Rita Forbes
email:- die...@easynet.co.uk
Lister Cold-Starting Diesel Engines
Engine info etc at:-
http://www.oldengine.org/members/diesel

--

[Julian]

In article <memo.2000070...@phirons.compulink.co.uk>, Peter
Hirons <pe...@softwell.co.uk> writes

>I don't think that's likely as most JP2s or 3s I've seen have had straight
>through cooling. Over-cooling constantly! I'm not sure how the water
>pump would react to a pressurised system though - mine used to leak most
>of the time! I'd be inclined to provide a vent to keep the system at low
>pressure and a means to switch to direct canal water cooling if things get
>too hot.

My JP3 runs on a skin tank system but is unpressureised it means that
the header tank has to be reasonably empty to allow for expansion when
the engine warms up. As for the pump I have put new rings on the pistons
in mine so that it stops any leaks. Mind you the leather, yes leather
rings were hard to come by!