Diesel Heaters

Submitted: Saturday, Sep 08, 2018 at 18:34
ThreadID: 137216 Views:1075 Replies:5 FollowUps:11
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Has anyone purchased a heater on Ebay? I have a Planner and am about to throw it in the bin and start again. Cost me $800 and still doesn't work properly. Johno
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Reply By: Shaker - Saturday, Sep 08, 2018 at 18:44

Saturday, Sep 08, 2018 at 18:44
You most likely have a Planar, I have one as do several of my friends & they all perform faultlessly. When it was installed did you mount the pump at the designated angle?
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Reply By: RMD - Saturday, Sep 08, 2018 at 20:43

Saturday, Sep 08, 2018 at 20:43
Yes Shaker, it definitely isn’t Planner. All the installation info has PLANAR printed on it. DIESEL. is named after Rudolph of the same name.
Leave the a in there and drop the I, it will become desal, no salt.

Johno59

You still haven’t given an account of what you have checked to give much of an idea as to what, has and hasn’t, been done. Makes diagnosis of problems via the light beam fairly difficult. Why don’t you find someone who has used one and knows a little about them to sort your problems.
Recently you said it ran for 2 hours, no worries.

What is the problem now????

As Shaker said, did you mount the pump as directed?
Does your battery voltage stay sufficiently high enough for ALL the expected run time?? You haven’t answered that question yet.
We try to help you, but it seems you don’t wish to help yourself.
AnswerID: 621099

Follow Up By: Shaker - Saturday, Sep 08, 2018 at 20:51

Saturday, Sep 08, 2018 at 20:51
I have a Planar in the Tvan & an Eberspached in the Quantum, they are absolutely worlds apart in price point, but I can’t tell the difference in any aspect of performance.
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Follow Up By: RMD - Sunday, Sep 09, 2018 at 09:29

Sunday, Sep 09, 2018 at 09:29
Forgot to mention
I bought mine off the internet like the OP is asking, it is also a PLANAR brand and apart from a slight airleak into the diesel line, (my fault not checking join integrity closely enough) it too, works as it should.
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Follow Up By: johno59 - Wednesday, Sep 12, 2018 at 21:04

Wednesday, Sep 12, 2018 at 21:04
Thanks for your help Guys. Finally I have found the problem after changing the fuel line and filter, cleaning out the fuel tank, checking the pump and a few other things.......the unit has been overheating caused by inadequate air flow from the inlet and outlet duct. As soon as these were removed the unit fired up and kept running continuously for a few hrs. So now I have to work out how to improve the airflow by repositioning the ducts. It really didn't occur to me that this could cause a heater to shut down and that a good airflow is critical. Thanks again
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Follow Up By: Shaker - Wednesday, Sep 12, 2018 at 23:02

Wednesday, Sep 12, 2018 at 23:02
Thanks for lettting us know what the outcome was, most don’t seem to bother.
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Reply By: Member - Phil G (SA) - Sunday, Sep 09, 2018 at 13:05

Sunday, Sep 09, 2018 at 13:05
I have purchased 3 of the EBay diesel heaters recently and all are good - a 3kW for a Tvan and two 5Kw for mates caravans. I also have an Eberspacher D2 2.2Kw in our caravan. The EBay ones cost between $200 and $300 and the Eberspacher is a smaller unit and costs $2000. Components look very similar
As stated above, you must have good battery power and wiring to it as the glow plug draws up to 10Amps when warming up, and the fuel pump must be directed upwards 30 degrees or so.
AnswerID: 621111

Reply By: RMD - Thursday, Sep 13, 2018 at 11:44

Thursday, Sep 13, 2018 at 11:44
Johno
I hope you didn't have the heater inlet drawing air from a sealed underbed cavity. That would starve flow. Ins and outs have to be the same.
AnswerID: 621186

Follow Up By: johno59 - Thursday, Sep 13, 2018 at 13:36

Thursday, Sep 13, 2018 at 13:36
No I haven't. Still experimenting to day. It's weird... take off both Inlet and Outlet and it works. The outlet duct heat hits a wall about 350 mm away and disperses. It should have been placed so that the heat shoots straight down the centre of van. I suspect that's my main problem. What do you think? There are no obstructions for the inlet duct plenty of air there.
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Follow Up By: Shaker - Thursday, Sep 13, 2018 at 16:30

Thursday, Sep 13, 2018 at 16:30
You could try putting a temporary angled deflector to deflect the sir away from the wall & see if that works. Mine is about the same distance from the closed hatch on the Tvan, if I don’t use the tent I have an outlet vent that deflects the air away at about 45 degrees & have never had any issues with it cutting out. I didn’t think I f the issue that you are having, I only did it because I didn’t want the outlet blowing so close to the tent stowed in the hatch net.
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Follow Up By: johno59 - Thursday, Sep 13, 2018 at 17:22

Thursday, Sep 13, 2018 at 17:22
Thanks Shaker, That's exactly what I am doing. Just have to see how that goes. It's a process of elimination. Pretty certain now it's an Airflow thing.
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Follow Up By: RMD - Thursday, Sep 13, 2018 at 17:43

Thursday, Sep 13, 2018 at 17:43
Johno.
Are you sure there is no restriction in either the intake or exit ducting. ie, a piece of rag or plastic against the exit grill???
PS.
If the return air gets to the set temp of the thermostat it will stop and then restart when the temp drops below set temp. Takes a while to do that.
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Follow Up By: johno59 - Thursday, Sep 13, 2018 at 20:51

Thursday, Sep 13, 2018 at 20:51
None at all mate.
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Reply By: Frank P (NSW) - Thursday, Sep 13, 2018 at 20:48

Thursday, Sep 13, 2018 at 20:48
Is it possible the air circuit is "short circuiting"? That is, heated air is getting back into the cold air intake too soon.

If your hot air outlet is directed at 90 degrees to a nearby wall and the return air inlet is not too far away from the hot air outlet, then you could get an " air short circuit". This can cause an overheat situation.

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AnswerID: 621197

Follow Up By: johno59 - Thursday, Sep 13, 2018 at 20:59

Thursday, Sep 13, 2018 at 20:59
Thanks Frank, I think that is the problem. See how we go tommorrow. thanks
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FollowupID: 893719

Follow Up By: johno59 - Friday, Sep 14, 2018 at 18:24

Friday, Sep 14, 2018 at 18:24
Relocated the hot air outlet. Previously it was pretty much hitting the wall just opposite. All good now, working well. Had no idea how important airflow is. Simple problem but I overthought it. Thanks again Frank really appreciate your advice.
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