Sorry guys - another calorifier question

[chasroberts]

With apologies to the panel. New calorifier in and fitted. The immersion heater has been connected and lots of lovely piping hot water now emerges from the hot tap. SWMBO is very pleased.

Am just in the process of making up the engine water leads. I was advised to have a pump in the sytem which will be placed on the return side (thanks to Vyv Cox for that piece of advice) to minimise the heat.

My query is regarding powering the pump. I want it to work when the engine is running and stop when the engine stops but am not sure where to take power from in the system to achieve this. Any thoughts please?

Engine is a Bukh DV36.

Thanks to all in advance.

Chas

 

[KellysEye]

We had a calorifier that packed and I replaced it. Neither had a pump and I've never seen a digram for the plumbing of a calorifier with a pump in it. Are you sure you need one?

 

[theoldsalt]

Chasroberts,

I had a fuel pump fitted to my engine which needed to run only when the engine was running. It was wired into the engine ignition switch on the "run" terminal.

You could do the same for your water pump. However check the current demand is not excessive for the switch/supply cable.

 

[chasroberts]

However check the current demand is not excessive for the switch/supply cable.[/QUOTE]

That's my worry. Anyone know if there is possibly some sort of solenoid type thingumyjig which would route power to the pump when the ignition circuit was powered up? Just a thought.

Thanks all

Chas

 

[chasroberts]

We had a calorifier that packed and I replaced it. Neither had a pump and I've never seen a digram for the plumbing of a calorifier with a pump in it. Are you sure you need one?

Apparently so. The engine hot water pump is not really up to the task so I have been reliably informed.

Wasn't a huge investment and I can always manually switch the pump on and off. Just with age comes that memory thing......what's it called? Oh yeah ...loss!

Chas

 

[wotayottie]

However check the current demand is not excessive for the switch/supply cable.

That's my worry. Anyone know if there is possibly some sort of solenoid type thingumyjig which would route power to the pump when the ignition circuit was powered up? Just a thought.

Thanks all

Chas[/QUOTE]

Yes. Use a headlamp relay from a classic car ( a Mini say) and available cheap from car spares shops. Alternatively put the brain in gear and check the specs of both the ignition switch and the pump to see what current car be provided and what load is likely.

 

[theoldsalt]

Watayottie beat me to it.

I agree, if you are not sure of the current capacity of the switch then fit a 12v relay and an ideal source would be from a car.

 

[david_bagshaw]

Use a bog standard relay

This diagram shows how, replace lights for pump.

http://www.classictruckshop.com/clubs/earlyburbs/projects/bosch/foglites.htm

 

[chasroberts]

Thanks guys, looks like just the ticket.

Will start scouring round for a relay.

Thanks to all, again.

Chas

 

[david_bagshaw]

Thanks guys, looks like just the ticket.

Will start scouring round for a relay.

Thanks to all, again.

Chas

about 3 to 5 from motor factors