[U.S. wfp USER]

How big is the heat exchanger on the unit?

What are the aproximate deminsions?

[edd]

FAR  TO BIG?? we have to use a thermostat to regulate the heat

[LWC]

edd you coming on msn?

[edd]

ok

[LWC]

ok

come on then lol!

[U.S. wfp USER]

FAR  TO BIG?? we have to use a thermostat to regulate the heat

Thats probably due to the fact that the webasto is set to heat up the coolant to 160 degrees farenheit.

What thermometer have you fitted and are you using a pump to circulate the water from the holding tank through the heat exchanger?

[rhys11]

FAR  TO BIG?? we have to use a thermostat to regulate the heat

see this pic can some one please explain to me what all the tubes and and pipes and where the fule goes to the heater please

[[GQC] Tim]

FAR  TO BIG?? we have to use a thermostat to regulate the heat

see this pic can some one please explain to me what all the tubes and and pipes and where the fule goes to the heater please

Yea would like to know that too.

[U.S. wfp USER]

Its pretty straight forward really.

The only issue I see is that V8edd is stating that they are running water in that header tank.  From my dealings with webasto it is supposed to be coolant because of the fact that the thermo 90 is made to heat coolant, not water.

[Nathanael Jones]

Engine coolant normally is water,.. with a bit of antifreeze added,.. but heating pure water with the unit won't make any difference!

[U.S. wfp USER]

Personally I'm done fooling around with the on demand variety and think that this webasto idea is the best.

I've started locating items via the internet.

Anyone got a lead on a digital thermostat with an aquatic probe?

[Nathanael Jones]

How would you plumb it up? Heat the entire tank? Or heat a calorifier tank and mix hot and cold to the desired temp?

[U.S. wfp USER]

I would run a header tank to the webasto then run that coolant/water through the heat exchanger.  Circulate the pure water through the heat exchanger and back into the tank. 

IF you could put a thermostat on the circulatory pump bringing the water in and out of the tank through the heat exchanger then you could control the water in the tanks temp with it.

[Wayne Thomas]

Here's an idea. Build a baffled mobile tank with a lid that can be secured and removed, then fit a DIY heat exchanger into the tank utilising the maximum space inside the tank. That way the baffled tank replicates a calorifier tank that utilises the heat from the webasto indirectly. It's just an idea, but it's feasible and would maximise heat. The only problem would be that you'd have to have some way of directing the heat elsewhere once the desired temperature in the mobile tank has been reached. Have fun

If I had a workshop and the space along with the materials I would build one myself but the trouble is I don't have the free time or the space.

[Village Gleam]

I repeat my question. How long did you run the on demand system for, before it screwed up usa wfp user?

I'm a veteran of 6 wks. All of the posters on this thread seem to have a lot more technical knowledge than me and I'm very unsure of why everything works fine for me, or why, but it does.(so far)

My system cost no more than a pump board with a varistream, or a hose reel. If it breaks I already have a replacement lined up.

Running costs are less than half of even red deisel (Uk has an untaxed fuel dyed red). How did I manage to go so wrong?

[Nathanael Jones]

I repeat my question. How long did you run the on demand system for, before it screwed up usa wfp user?

I'm a veteran of 6 wks. All of the posters on this thread seem to have a lot more technical knowledge than me and I'm very unsure of why everything works fine for me, or why, but it does.(so far)

My system cost no more than a pump board with a varistream, or a hose reel. If it breaks I already have a replacement lined up.

Running costs are less than half of even red deisel (Uk has an untaxed fuel dyed red). How did I manage to go so wrong?

I don't think you went wrong at all.
I think your system is a very good one,.. and for the price it just can't be beaten...... but I personally have reservations about carrying a gas cylinder in the van,... what if I was in a crash??? This is a matter of personal preference really,.. not a performance or suitability issue.
The diesel heater idea has safety benefits IMO, and the units are specifically designed for prolonged use in a vehicle. I also don't believe they would cost any more to run, even if you used standard diesel,.. check out the fuel consumption stats on the erberspacher website!

[Wayne Thomas]

In a previous career as a welder, I once had to go into a building with a vehicle ablaze with 10ft petrol flames and shut off, disconnect 4 large Oxy Acetylene set ups and lie them down and roll them out of the building close to the vehicle which was starting to lite the building because none of the fire extinguishers worked. I was nervous as hell, but it had to be done. By the time I'd finished I was soaked with sweat and full of adrenalin and shaking. Each one of those eight cylinders were the equivalent of a 100lb bomb if they should go off.
I would hate to carry gas cylinders in my van after that experience when there is an alternative...diesel heaters. Safety has to come before saving a small sum on money.

[U.S. wfp USER]

I repeat my question. How long did you run the on demand system for, before it screwed up usa wfp user?

I'm a veteran of 6 wks. All of the posters on this thread seem to have a lot more technical knowledge than me and I'm very unsure of why everything works fine for me, or why, but it does.(so far)

My system cost no more than a pump board with a varistream, or a hose reel. If it breaks I already have a replacement lined up.

Running costs are less than half of even red deisel (Uk has an untaxed fuel dyed red). How did I manage to go so wrong?

It worked on several occasions.  Problem is the 1st time it froze in the van it burst an internal component and now its done.

That coupled with propane onboard in the van is not a good idea in my opinion.

[edd]

ooohh sorry guys been away ...... I did do some of it but it was an Ionic thing to start with
then I butchered it to work properly lol... I put a thermostatic valve in and set it with an digital thermometer
to what the temp is outside so it changes daily . Today it was -3 so it was only on 20 degrees
 quite cool really but still nice to work with I HATE a cold stiff hose lol
A digital thermometer is readily available from any good cook shop about £ 10
 might not be much to do with this much but here are some pics of the burner before and after

[U.S. wfp USER]

After doing a bit of research and talking to the manufacturers of these various heating elements I am leaning towards the heater that omnipole is using.

It can also be used as an on demand heater.