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it doesnt hurt,..... that injector is a big hole, so unless you are burning used oil or ethylene glycol antifreeze thru your heater, it probably will never plug up. I have 387 real hours of run time on mine running d1, d2, k1, jp8, jp4, some oil, sometimes a whiff of gas from the bottom of the jug, and never had injector issuesShould I run injector cleaner through my heater?
Hi,That's what happened to me...my shop went to 90F , it was running after but without flame, have reached hi temps many times before without an issue. It is frustrating, they over engineered those units, the more parts...bigger the price. I disassembled my burner, the injector was clean...they usually get a crust at tip if you don't let it cool down enough before turning off, that was my first time learning when the unit stop working years ago, I have an H81 so the coupler is metal and is not the issue, diesel seems like to flow OK, I got an auxiliary tank and was sucking the diesel good but no flame on burner still. My blue arc is always on, I even gaged the tips. Finally, I replaced the K8 relay with an "exact" same new relay..still...no flame. I don't know if could be a sensor...and if sensor shut the arc or shut the diesel flow ? I am guessing the diesel flow, this damn thing has 3 sensors (that I saw at least). Need be careful buying parts not knowing what is wrong, I paid $200 for the unit 7 years ago and already wasted over $100 on a K8...it can be sooo many things wrong. I will try a few more things when I have a chance.
|DRS ENVIRONMENTAL SYSTEMS, INC.||DBA D R S||7375 INDUSTRIAL RD||FLORENCE||41042-2911||UNITED STATES|
|EMERSON ELECTRIC CO||WHITE RODGERS CO DIV||9797 REAVIS RD||SAINT LOUIS||63123-5329||UNITED STATES||FORMERLY WHITE RODGERS CO ST LOUIS|
|DBA DRS SUSTAINMENT SYSTEMS||201 EVANS LN||SAINT LOUIS||63121-1126||UNITED STATES|
Hi,Have you used everyone of the NSN's and part numbers in your search engine?
The following companies supplied the part to the Military.
DRS ENVIRONMENTAL SYSTEMS, INC. DBA D R S 7375 INDUSTRIAL RD FLORENCE 41042-2911 UNITED STATES EMERSON ELECTRIC CO WHITE RODGERS CO DIV 9797 REAVIS RD SAINT LOUIS 63123-5329 UNITED STATES FORMERLY WHITE RODGERS CO ST LOUIS DBA DRS SUSTAINMENT SYSTEMS 201 EVANS LN SAINT LOUIS 63121-1126 UNITED STATES
Have you lost power while operating it or been doing hard shut downs? A crusty nozzle will escalate to that mess as well. Dirty nozzle, low oil pressure or filter clogged or restricted exhaust are all I can think of.Long time without posting in this thread. Used the heater intermittently back in 2019, then it sat unused for several years. I moved it to center of the shop this year, added a duct system to blow air to both ends of shop, then fired it up again. Got 3 days of running 8 hours per day, then it started acting up again, so tore it apart again. Maybe 50 gallons of fuel has been thru it since nozzle and fire-eye were cleaned in 2019, pic below, if it works, is how it looks now, lots of black soot and carbon buildup, the wet diesel is what seeped out of nozzle after disassembly. Running straight diesel, no WMO. What would cause this? Too rich? IIRC fuel pressure was 90psi, but need to get it back together to check for certain. I see previous suggestion of 70psi, maybe I should adjust down?
No power losses while operating, and let fan run for 2-3 minutes after turning burner off. Put a new filter on it in 2019, and as stated above less than 50 gallons of diesel thru it since then. Exhaust was lengthened by 16" this year, and that extension is .200 smaller diameter, could not find an exact match in pipe out here in bfe, exhaust length approx 6' .Have you lost power while operating it or been doing hard shut downs? A crusty nozzle will escalate to that mess as well. Dirty nozzle, low oil pressure or filter clogged or restricted exhaust are all I can think of.
I hope the cleaning does it for you. Is there any chance water could have made it into the fuel? Just some condensation in a near empty tank can be problematic, sputtering builds up goop quick. Fresh fuel and cleaning and check electrode gaps is a great first step.No power losses while operating, and let fan run for 2-3 minutes after turning burner off. Put a new filter on it in 2019, and as stated above less than 50 gallons of diesel thru it since then. Exhaust was lengthened by 16" this year, and that extension is .200 smaller diameter, could not find an exact match in pipe out here in bfe, exhaust length approx 6' .
If my memory is correct, in 2019 I would push bleed/purge valve before firing, and it would fire when switched on, this year would do same but it would not fire on first try, I'd switch back to fan and purge again, then it would fire. Thermostat was set at 60F, and burner would stay on for hours without cycling, decided to bump thermostat down to 50F on saturday and it started cycling, roughly 1 minute on, 1 minute off. Left for an hour and returned to find shop cold, and red light of death on, purged, reset, it cycled a few more times, then red light of death again, so I shut it down. Tried starting it again on sunday and it would not fire.
Fire-eye was dirty, soot wiped of of nozzle easily, diffuser ring scrubbed clean.
Edit: Nozzle taken apart/inspected, looked clean under high power magnification, and now back together. Getting ready to reassemble burner and try again.
.It is back together, and no joy. It just sputters and chuffs, I can see a nice hot arc on the ignitors with just the fan on but can tell its not lit by holding my hand over viewing port. I did clean viewing port too, after 3 no-starts it had an oil mist so cleaned again. I'll see if I can get someone to come by and throw switch while I look inside to see whats happening.
Are the H82's any better, I picked a few of those up last year, keeping the H81 running seems to be a pia.
Has anyone ever had one of these run for years without issue?
Edit: Condensation, I guess its possible, but fairly unlikely. It was stored for 3 years with half tank of fuel, but our relative humidity is usually under 30%, and there are no wild temperature fluctuations in the Ice Castle. And that fuel would have burned off in the first 2 days, since then its 5 gallons at a time from the only gas station in town a block away. Its so dry here that the occasional rodent that finds its way in just mummifies, no rotting action, maggots etc, and the snow sublimates faster than it melts.
I honestly don't know if they do a winter blend here, we hit a new low for a specific day here a few weeks ago -21, so it would not surprise me. Does algae grow in cold diesel? I ran most of the old diesel out in the first 2 days, the filter is one of the "self cleaning" type where you twist handle to clean it, and experience with last one says they don't come apart..
What if... Temperature where you are? Is it colder that a witches @#$ in a brass bra? Fuel. Is it a winter blend?
If you can get it to crank up and run for a bit, some fuel additive might help freshen up the fuel. It that 50 gallons from 2012? Any possibility that you gathered algae while fuel sat in the tank? Any sort of filter that you could replace?
I did put fuel in it Saturday morning, hour or 2 before the problems started, was questioning if maybe I had purchased gasoline by mistake. Fuel can was still right next to heater last night so checked, does not smell like gasoline, feels oily, and would not light off like gasoline with a flame next to it. Not sure how to check if its "bad diesel".If fuel is coming out of the nozzle, and the igniter is popping off, its got to burn.Are you sure the fuel good?
.Looking at manual page 3-16.3 Heater Fails To Operate, it says to check for failure of R1 rectifier and TT meter. Where is R1 rectifier on the H81? Has anyone ever found the H81 manual, I find slight differences not shown in H82/83 manual.
The heater is inside, an all concrete room, its wicked cold in there but that is also where water line comes into building and the pipes don't freeze, and the day it quit working room was nice and warm inside, at least the air was. On the H81 there is NO replaceable filter element, its a whole assembly, requires removing plumbing, and not cheap, if I can even find one. I'm going to open burner again, disconnect line to nozzle, and see what kind of flow it has, thinking it should also drop pressure too. If pressure stays high, and fuel barely dribbles, I'm going to suspect solenoid valve..
I hate to admit that I don't know the answers to these other questions, but at -22 fuel will want to gel. In the lines the fuel moves faster and "without its friends" in the tank, it gets colder. IE: Fuel will freeze in the line way before the tank. That happens in a diesel engine for sure...
I would think it would be worth a bottle of (Brand) 911 fuel additive would help. The additive raises the Cetane rating in the fuel. Mix it according to the directions on the bottle. Don't be bashful. Better too much than not enough. Would also make a fuel filter change again.
Where would I find the TM number, don't see it on data tag, but there is an NSN and contract # ?This is the problem when everyone and his dog uses one thread to troubleshoot problems. Its super long, and 99% of it doesn't pertain to your problem. What is the TM number that is for the H81, so I do not have to look through 10 pages of comments to find it?
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