Eberspacher from my Transit

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pcatterall

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My Ford transit camper van is getting a bit long in the tooth for SWIMBO and I want to use the Ebberspacher in the boat.
The existing control (a rheostat) on the actual unit only allows working for one hour then has to sleep for an hour.
This has been a bit of a problem in the van and will be even less convenient in the boat wher ethe unit willl be hidden away in the after end.
I was looking at the wiring to see if I could fit a remote thermostat timer but the wires are not quite as shown in the Ebber diagram. I think that Ford or the convertersdid a bit of there own thing. There is for eg no grey lead into the control unit and the rheostat has a purple rather than yellow lead. The purple lead goes into a bolted on (English made control unit) which also has a yellow lead plus a white lead which features nowhere on the diagram.
Has anyone seen this arrangement and can anyone advise on fitting a timer (and why the one hour between heat cycles) ??
Please guys don't fail me as its me that has to get up in my undies to turn the dam thing on!!
Best wishes to all.
 
Re: Eberspächer from my Transit

My Eberspächer came out of a BT van and also had the timer connected. The guy who I bought it from in Hull had bought a job lot and had converted them all to run without the timers.

I never saw the timer nor how it was connected. He was very proud of what he had done and gave me 'his' new circuits without timer boxes.

These might mean something to you, as I said, I did not do the change so they mean very little to me......

eber-therm-rewire.gif

________________________________________________________________________
eber-rheostat-rewire.gif
 
Re: Eberspächer from my Transit

Many thanks for this, I'm glad that someone was able to do this (gives me hope)
The diagram is similar to that in my 'manual' only trouble is that I dont have the grey wire shown going to the timer. That may be the secret... possible I just need to provide this.
Thanks again
Regards
 
Re: Eberspächer from my Transit

If you read his notes on the diagrams I uploaded you will see that the grey wire was missing on his, he states that he added the yellow wire to pin 8 on the harness, I guess he had some yellow wire hanging about and connected to an empty pin maybe??

The notes I copied verbatim, he had handwritten them on the diagram.
 
Re: Eberspächer from my Transit

Hi, any of the recent Eberspacher heaters can be made to work by connecting: the thick red wire to a batery positive, the thick brown to an earth, the yellow wire is the 'trigger' wire, so when this is switched to a positive, the heater will run and when the yelow wire is switched off, the heater will go through it's cool-down cycle. The 'rheostat' isn't one at all, it is a modulator which controls the internal thermostat of the heater. Connected this way, the heater will run on full output. The other wires in the controller harness are to power the controller, for diagnostic use and to run the heater in ventilation mode.

Peter
 
Re: Eberspächer from my Transit

[ QUOTE ]
The 'rheostat' isn't one at all, it is a modulator which controls the internal thermostat of the heater. Connected this way, the heater will run on full output. The other wires in the controller harness are to power the controller, for diagnostic use and to run the heater in ventilation mode.
Peter

[/ QUOTE ]

Connected this way? Do you mean as in the diagram I posted.

My 1DLC certainly does not run at full pelt all the time and can be adjusted. The term Rheostat is from Eberspächer I have never questioned it, even if it is not and is a modulator as you state, then it is doing a better job, as it will be a far more efficient heater by controlling fuel flow to match the temperature of the returning air.

All he appears to have done then is remove the timer and put back the yellow wire which now has a permanent 12v feed to keep the heater on. Why should this affect the 'modulation' of the heater, if what you say is true, all Eber's must run at full pelt unless they have the thermostat connected?
 
Re: Eberspächer from my Transit

Hi, what I mean is that the heater will run on full heat if connected witout a controller of any sort, just using the main positive and negative and then switching the heater on and off by suppling a positive to the yellow wire.
On my own heater, I use a timer/modulator with an external temperature sensor.

Peter
 
its easy peasy, unplug the black timer box, this is what gives the i hour, i suspect to stop bt techies skiving, the purple wire needs to be joined to the yellow one coming from the rotary switch and thats it!
stu
 
Re: Eberspächer from my Transit

Peter, Are you saying that if I supplypower via a connection to terminal 6 on the 'rheostat' then the unit will stay on and that the 'rheostat' will function?
Then tell me the difference between a modulator and a rheostat. I thought that a rheostat was a variable resistance (but that was 50 years ago!!
Thanks and regards.
 
Re: Eberspächer from my Transit

Hi, the rheostat control is powered by the red on terminal 5, earth on terminal 1. Terminal 6 is the output from the rheostat which switches the heater on or off and should be connected to the yellow wire in the heater loom, I would expect that the BT timer will interrupt this yellow wire, to give the 1 hour on/1hour off.

Peter
 
Re: Eberspächer from my Transit

Thanks Peter,
Yes, the yellow lead is routed through some kind of non Ebber circuit board and comes out as a purple lead to terminal 6.
I reckon that BT installed this to stop their workers sitting in tha van all day!!
Regards
 
Many thanks Mr DogWatch and Peter B. The unit is now working fine, not switching off and resting for an hour as before.
I am going to invest in a timer/thermostat so I can control it from my berth.
There was, in fact, a little box added which as suggested would control the switching off an resting. I will keep that as I'm sure that there will be a use for it one day!!
Thanks again
PS..... Sorry I missed the post from SkipperStu.... absolutely correct..thats what I did (except I threw away the purple wire and put the yellow in directly.
Thanks
 
Re: Eberspächer from my Transit

Brilliant I am glad you have sorted it, is it worth you drawing out or photographing what needed doing as I am sure this question will come up again. A picture says a thousand words.

If you have no hosting site I will happily throw it up to my photobucket site for you or others to link to in the future.

I know Stu says it is simple, but not everyone is happy with wiring, to give confidence to allow people to do it themselves is much better than pointing them to a eber dealer.

Just a thought really.....
 
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