this Bl**dy Heat exchanger....

[funflair]

I've not caught up with the thread, but hopefully Martin's post quoted below, will help to clarify.


And that's how ours is, and Martin would know, as he replaced the pump at some stage.

Cheers,

Jock.

No I just strung it back up with cable ties it was original.

 

[Silver-Fox]

I've not caught up with the thread, but hopefully Martin's post quoted below, will help to clarify.


And that's how ours is, and Martin would know, as he replaced the pump at some stage.

Cheers,

Jock.

Yes further replies cleared up the fact I had made a presumption and we know where that leads

I did apologise as well

 

[Ridgeway]

 

[Ridgeway]

PS I’m still jealous you’ve had a tow bar fitted just had received the quote for ours

 

[haganap]

View attachment 977787

Doesn't look like my engine that, but at least I know what it might look like

^{_{Subscribers  do not see these advertisements}}

 

[JockandRita]

No I just strung it back up with cable ties it was original.

I was sure you told me you replaced it Martin. Anyway, it's still as you left it.

I did apologise as well

Nice one, but it wasn't a problem for me.

Cheers,

Jock.

 

[Silver-Fox]

Nice one, but it wasn't a problem for me.

Not saying it was a problem but I’m old school, if I’ve cocked up I’ll hold my hands up to it

 

[Ridgeway]

Coolant pump is in the same locker as the water pump on the RHS:

 

[haganap]

Coolant pump is in the same locker as the water pump on the

View attachment 977793

That's interesting, I've not seen this...
But what is it? Is it the pump that is activated by the fan switch that then pumps fluid around the system?

It's thrown me a bit of a curve ball.

 

[Ridgeway]

That's interesting, I've not seen this...
But what is it? Is it the pump that is activated by the fan switch that then pumps fluid around the system?

It's thrown me a bit of a curve ball.

I think so, yes.

Do you have that pump on yours ?

^{_{Subscribers  do not see these advertisements}}

 

[haganap]

I think so, yes.

Do you have that pump on yours ?

Not seen it but not looked there either.

 

[bigtwin]

That's interesting, I've not seen this...
But what is it?

If it is the same as the system on our Dethleffs that pump would be the one that is used to warm the engine from the heat generated by the Alde boiler system. I would expect the HX to be not far away from the pump.

Is it the pump that is activated by the fan switch that then pumps fluid around the system?

Can’t comment on that specific switch but again, on ours, there was a switch to start the pump to initiate the engine warming process.

Ian

 

[AdrianChen]

That's interesting, I've not seen this...
But what is it? Is it the pump that is activated by the fan switch that then pumps fluid around the system?

It's thrown me a bit of a curve ball.

On our Carthago there are two separate systems: heat booster to the cab area, and heat exchanger.

Booster
We have a heater matrix and fan to give extra warmth to the cab area, this has a switch on the dashboard. It runs entirely off the normal Alde heating circuit, but adds the matrix and fan to give a boost. (Confusingly Carthago used a Truma branded switch for this)

Heat exchanger

This system will give two modes of operation if the valve on the HX itself is open.

Engine to hab area heating:
When the engine is hot and running, the engines normal water pump sends the engine coolant through to the engine side heat exchanger. If the main valve is open, then the Alde heating fluid will circulate though the hab side of the heat exchanger, assuming the thermostat is set on the panel to a lower than ambient temp. This will heat the alde fluid to "bloody hot", so the gas and electric options do not need to be on, and the normal Alde circulation pump then pumps the Alde fluid round the van. Seems to take around 45mins and the van and water heat up nicely.

Hab area to engine pre-heating before start up.
When the engine is cold, and the van heating system is warm, the Alde heating fluid will be warming the heat exchanger if the valve is open, we have a switch on the dash to turn on an additional pump in the vehicles coolant circuit which runs engine coolant through the engine side of the HX. (There is a note in the manual that says not to operate the pump if the engine is running, which is apparently important. The note saves the cost of a D+ triggered relay I guess maybe yours has one?) The now hot coolant then circulates through the engine warming it up prior to starting, hopefully after some time 20-30mins? the oil is warm.

Hope that helps - writing it helped me!

 

[WESTY66]

On our Carthago there are two separate systems: heat booster to the cab area, and heat exchanger.

Booster
We have a heater matrix and fan to give extra warmth to the cab area, this has a switch on the dashboard. It runs entirely off the normal Alde heating circuit, but adds the matrix and fan to give a boost. (Confusingly Carthago used a Truma branded switch for this)

Heat exchanger

This system will give two modes of operation if the valve on the HX itself is open.

Engine to hab area heating:
When the engine is hot and running, the engines normal water pump sends the engine coolant through to the engine side heat exchanger. If the main valve is open, then the Alde heating fluid will circulate though the hab side of the heat exchanger, assuming the thermostat is set on the panel to a lower than ambient temp. This will heat the alde fluid to "bloody hot", so the gas and electric options do not need to be on, and the normal Alde circulation pump then pumps the Alde fluid round the van. Seems to take around 45mins and the van and water heat up nicely.

Hab area to engine pre-heating before start up.
When the engine is cold, and the van heating system is warm, the Alde heating fluid will be warming the heat exchanger if the valve is open, we have a switch on the dash to turn on an additional pump in the vehicles coolant circuit which runs engine coolant through the engine side of the HX. (There is a note in the manual that says not to operate the pump if the engine is running, which is apparently important. The note saves the cost of a D+ triggered relay I guess maybe yours has one?) The now hot coolant then circulates through the engine warming it up prior to starting, hopefully after some time 20-30mins? the oil is warm.

Hope that helps - writing it helped me!

I drive mine for 5 hours with that pump running (in my defence the switch is in a stupid place and easy to knock on with your foot/leg)
When I went to alde for a fluid change I asked them to check it and they said it was fine and working normally, but I am conscious of knocking it on