Club 80-90 Forums

I fitted an ebber yesterday for an 80-90 member so thought I might as we film it to show you what I got up to. Some people might be able to find some use for it if they are thinking of getting one,

http://campervanculture.com/syncro-mechanical/

jed

You didn't use that (5mm?) rubber fuel pipe all the way to the pump did you? There may be problems with the heat output if you did - it should be 2mm pipe with rubber connectors.

Heat output?

Wadday mean...

It has the rubber fuel hose to just before the pump where it is reduced to the smaller rubber pipe that comes with the unit with an olive the same size as the clear pipe It then has the f o r d transit/eberspacher clear fuel pipe to the unit from the pump (just over a foot I think)



Jed

If you use large bore pipe it can lead to air bubbles getting lodged in it. The 2mm bore is used to circumvent this happening. That is also why the fitting instructions tell you to butt the 2mm pipe up to the spigot on the pump inside the rubber connector. You need the 2mm the full length from the T. (make sure that you have the correct T also - the correct ones are rounded inside rather than a sharp right angle).

I have seen in the manual where it says about butting the pipes up and don't bend on a joint due to risk of air bubbles if their is a gap between the thin plastic pipes inside a rubber join, but I am still confused about your heat out put comment. What do you mean?

Jed

The air bubbles restrict the fuel flow thus the heat output.

If their is a restricted fuel flow the heater will shut down right?

You can use 5mm pipe from how I understand it in the manual, No?

You do use a T peace, it shows it in the manual, No?

I cant see it saying anywhere that using 5mm hose causes air bubbles, you can clearly see that the fuel is taken via the vans fuel filter and it tells you to use a 5mm hose from what I can see

I am no expert, and can only go off what Eberspacher themselves advise in the installation documentation here it is for you to read, http://www.eberspacher.com/downloads/te ... hnical.pdf

Can you show me where it says dont use 5mm fuel pipe because it causes air bubbles and the related literature that says, "air bubbles restrict the fuel flow thus the heat output"

Many thanks

jed

As long as you've used 2mm pipe from pump to heater, it should be fine. Your instructions are different to mine (slightly).
Regards 2mm and unit output, I'be always understood it to restrict what the pump can pump, so restricting output. As you move up to bigger models, I would imagine fuel line size would increase

Like why you have a bigger 22mm copper pipe to the hot water tap on your bath right?

I know scores of people who have a pump dunked in a fuel can and thats a big gauge pipe

I wait in anticipation for the other posters reply then...

jed

From a D2 manual.


Tank connection for metal tank –
di = Ø 2 mm, da = Ø 6 mm
Tank connection for tank fitting –
di = Ø 2 mm, da = Ø4 mm
dosing pump
Fuel filter – only required for contaminated fuel.
Fuel hose, 5 x 3 (di = Ø5 mm)
Fuel pipe, 6 x 2 (di = Ø 2 mm)
Fuel hose, 4 x 1 (di = Ø 2 mm),
Fuel hose, 3.5 x 3 (di = Ø 3.5 mm),
approx. 50 mm long
Fuel hose, 5 x 3 (di = Ø5 mm),
approx. 50 mm long

Fuel pipe, 4 x 1.25 (di = Ø1.5 mm)
Connection fitting, da = Ø 4 mm



"Can you show me where it says dont use 5mm fuel pipe because it causes air bubbles and the related literature that says, "air bubbles restrict the fuel flow thus the heat output"" ..............................Practical experience. (+ it does tell you what pipe to use!!!! - it cannot go through all the permutations of what you could conceivably use and specifically state that you can not use each and every one!)

"You do use a T peace, it shows it in the manual, No?".......................T piece as I have already described.

The Airtronic M (D3 and D4) does use 5mm but the Airtronic D2 does not.

"Like why you have a bigger 22mm copper pipe to the hot water tap on your bath right?".....................NO,this is because the pressure in normal hot water systems is derived from the cold water storage/header tank situated in a loft, not from the mains as in the cold water. (not true in modern systems but this was how they were originally designed)- Not the same scenario at all.

Actually the d2 should have 1.5mm from the pump to the heater.

Your practical experience may or may not count for something, but it doesn't say anywhere you cant use 5mm as "There may be problems with the heat output" in the Airtronic manual or any suggestion of your air in the pipe personal theory on any of the Airtronic models in the Airtronic manual or the old D2 manual photo you kindly popped up.
I have had this very same heater used in my own van put through its paces for ages using the same bore pipe and it has performed faultlessly throughout this time. I am no expert but thats my practical experience for what its worth, and I will stick with what I have and use a T peace that is suggested in the Airtronic manual ...

Thanks for the input though very interesting theories of what might happen and someone might be able to use it one day.

Just thought I would also draw attention to the disclaimer that has always been on the Campervan culture website for anyone thinking of doing what we do

jed

Oh I am so sorry for not putting the prefix "Airtronic" before D2 before the diagram taken from an Airtronic D2 manual. For your information a D2 is an AIRTRONIC.

You do not appear to be able to see why there are clear instructions - you just go blithely forth doing what you will - that is your right. That does not negate the fact that you are doing it incorrectly. The manuals do not state the reason for numerous things being done in such and such a fashion but anyone with a jot of sense can see why it is so. The manuals are not idiots guides therefore are not , obviously, to be followed by you. I suggest that you write to eberspacher and point out to them that you need a manual that states why they have stated that various procedures should be carried out in that manner.

I have not at any point said do not use a T PIECE!!!!!!!!!!!!!!!

Stop throwing your toys out of the pram.

*Sigh*

also the bigger the bore of the pipe from the pump to the heater will mean a longer bleeding up time should there be air in the line.....

stands to reason that the pump will only pump the set metered amount per pulse, so the bigger bore the feed pipe from the pump, the more pump pulses needed to fill the pipe, and air between each and every pulse will mean lower heat output...

same symptoms as blockage in the pump filter, resulting in code 52 error

Not wanting to restart an old thread, but the way I see it is having a larger pipe would mean the pump would be working harder, needing more pressure to pump fuel.