Diesel burner pump type?

[freds]

Hi Everyone

Wiring up my Espar Diesel burner and I was trying to make sure that diesel feed lines was fully primed.

However, in using a brake system vacuum pump I was able to suck diesel up to the inlet, but not through the pump. However when I applied voltage to the pump I get a single click rather than the expected pumping sound.

I am wondering what the normal behavior of these pumps, are they a rotary pump or impulse pump that clicks away to provide a measured fuel flow?



Thanks

 

[freds]

Disregard I did a fresh search based on my previous question and found the answer I was searching for:

https://www.letonkinoisvarnish.co.uk/eberspacher_fuel_2.html

[Jim Blackwood]

So what was the answer?

[Knuckles]

I do know that the angle of the pump is critical. Espars patent has recently expired and after having an espar as a bunk heater in my semi for many years i am also planning to install one in my coach. The one i had in the semi was a 2 kw unit and I recently saw 8 kw units on amazon with all the supporting parts for only a couple hundred dollars instead of a thousand. What a bargain thinking of buying two

[freds]

So what was the answer?

It's a pulse driven pump and part of the startup criteria is that burner fire within a couple of hundred clicks/pulses.

So in normal operation the pump is  clicking away delivering measured amounts of fuel to the burner. So it's not a normal pressure pump and if it goes bad, you have to get a new pump that is calibrated for your burner.

I was momentarily applying power and expecting the pump to run, where as part of it's startup sequence it doesn't pulse the pump until the glow plug is up to temperature and the burner chamber fan is up to speed. Just a bit of initial operator head space adjustment needed!!!

[Jim Blackwood]

Danged computers again. Thanks.

Jim