520 Stoker Motor Tripping Out

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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GoodProphets
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Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces
Location: Lanc Co PA
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Post Tue. Mar. 19, 2013 9:05 pm

Uh oh

Stoker motor is tripping out.
I reset it a few times and also tried spinning fan, just keeps tripping.

Marathon 1/8hp 1725 rpm

I am gonna search the threads and see if I can find anything

Please if anyone can help asap, as we need heat.

Auger manually spins freely.

Thanks
Rob

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Rob R.
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Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Tue. Mar. 19, 2013 9:12 pm

Assuming there isn't something seriously wrong with the stoker and making the motor work extra hard, the motor is probably defective.

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GoodProphets
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Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces
Location: Lanc Co PA
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Post Tue. Mar. 19, 2013 9:17 pm

Well that sucks, 5 months and shot.

Yeah, I can spin the auger no problem.

I think I will take off motor and see if it runs with no load.

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Rob R.
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Stoker Coal Boiler: EFM DF520
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Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Tue. Mar. 19, 2013 9:19 pm

It might run with no load just fine, but that won't help you. See if EFM will warranty that one.

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GoodProphets
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Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces
Location: Lanc Co PA
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Post Tue. Mar. 19, 2013 9:29 pm

Ok, well something just got me,

I tried spinning the fan blade counter clockwise and it only went so far.
I then spun it clockwise and it went easy.
I then hit the reset button and I could see the motor spun about the same distance I spun backwards, then stopped and tripped.

So I just spun it backwards for a minute or two, then hit the reset

WORKING now?

I flipped the auger gear, so I can get more flames inside the pot....plus no extra load for now.

Not sure on this one, as there was no buildup in the auger, the fan seems to be fine and been running about 5 min now??

Hey, I am glad it is running for now, any thoughts?

waldo lemieux
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Post Wed. Mar. 20, 2013 8:56 am

Keep a spare motor on hand, they arent that expensive. Especially on the coldest night of the year, which we aLL know is when itll go bad for good! ;)

Waldo
When faced with a seemingly impossible task, my grandfather always said "can't never can, untill try comes along"

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blrman07
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Hand Fed Coal Boiler: Bucket a Day
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Coal Size/Type: Pea/Nut/Wood in the VC and anything that will fit in the Bucket a Day. It's not fussy.
Location: Girardville Pa.

Post Wed. Mar. 20, 2013 2:24 pm

It has warned you. Motor's trip for a reason usually due to loading but in this case the load is normal. This indicates the motor has internal problems and your borrowed time is about to expire. I recommend you make arrangements for a replacement motor now.
Rev. Larry
Ashland Pa.

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stoker-man
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Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Wed. Mar. 20, 2013 3:09 pm

Did you install the cover plate supplied with the motor, behind the fan?
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GoodProphets
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Joined: Sat. Jan. 07, 2012 9:14 pm
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces
Location: Lanc Co PA
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Post Wed. Mar. 20, 2013 4:26 pm

I will be ordering a motor asap

Everything seems to be fine. No binding or noise on startup and every startup has been successful since.
stoker-man wrote:Did you install the cover plate supplied with the motor, behind the fan?
I did not do the install, so I am not sure on this.
If this is in the install manual, I will check to see if it is there.

Oh question,

Does this motor normally run hot the touch?
I noticed this the first day or week, but never thought about it again.
It has been running for 5 months, so I take it as warm/hot being normal.

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stoker-man
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Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Thu. Mar. 21, 2013 5:37 am

It's supposed to be a TEC, totally enclosed motor, so it might run warm if you have a heavy load on it. If the dust cover wasn't installed, then the motor is filling with coal ash particles and its lifespan is reduced.
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vermontday
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Stoker Coal Boiler: EFM 520
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Post Fri. Mar. 22, 2013 6:05 am

I had the same problem with mine 5 months after starting it.

It turned out the ratchet arm assembly joints just needed a few drops of oil. I assumed that it was oiled at the factory, apparently they don't.

The manual calls for oiling these points.

Oil it now every 6 months, been running for years now same motor no problems.
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stoker-man
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Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Fri. Mar. 22, 2013 2:36 pm

That sentence in the manual should be rewritten. It was determined after the printing that dust sticks to the oil and causes the feed pawl to become gummy and not drop fast enough. The better advice is to keep it totally free from oil, but both ways is OK.
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Rob R.
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Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Fri. Mar. 22, 2013 2:44 pm

I think he meant each end of the connecting rod, not the drive pawl.

I oil the stoker linkage periodically with a sticky 140w gear lube, the drive and check pawl gets a shot of Kroil or some other light oil/solvent mix.

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vermontday
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Post Fri. Mar. 22, 2013 7:53 pm

Yes, I meant the connecting rod.
US dependence on foreign oil has created the greatest transfer of wealth in history.

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stoker-man
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Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Fri. Mar. 22, 2013 9:05 pm

Yes, definitely oil the connecting rod ends.
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