EFM 520 Only half pot burning

EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 2:25 pm

I have an EFM 520 and only front half of the pot is burning. Stoker unit on right. New worm and bushings have been installed and it still burns the same way. The grates look ok no cracks. Could they be warped and would this cause the problem.The coal is clean not much dirt. When I pull the ash tub out the front has more ash than the back half, but the coal is burned eqaully front and back just different quantity. Any help would be appreciated.

Thanks....
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: Rob R. On: Mon Oct 31, 2011 3:04 pm

pac-rat wrote:I have an EFM 520 and only front half of the pot is burning.


pac-rat wrote:When I pull the ash tub out the front has more ash than the back half, but the coal is burned eqaully front and back just different quantity.


How can only half the pot be burning and not fill half the ash tub with unburned coal?

If the worm and bushings are new, I would look for warped burn plates and/or air leaks. Make sure the air chamber doesn't have a buildup of fines, and also check to see if the pot is close to level.

What are you using for a coal size, feed rate, and air setting?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 3:31 pm

I know it sounds weird about the amount of ash from front to back, what goes in must come out. 4 feed,5 air, and buck coal and pot is level. Fines emptied every day.It did the same thing with rice coal. Maybe I should have said the back half is slow burning, its not all unburnt. I can take pics later of fire and ash tub. Thanks for the fast reply.
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: Rob R. On: Mon Oct 31, 2011 4:02 pm

Pictures of the fire and ashes would be great. It may be as simple as bumping the air up a little more...when I burned some Reading buck in my 520 I got quite a bit of unburned coal in the ashes with anything less than 5.5/6 on the air (with 4 teeth of feed).

But before you crank the air up...I will caution you to make sure the auger tube doesn't get hot where it comes out of the base, and it is still important to thoroughly check the pot and plates for air leaks.

Is this stoker new to you?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: EFM 520 Only half pot burning

PostBy: Rob R. On: Mon Oct 31, 2011 4:11 pm

One more thing, you said the stoker did the same thing with rice coal...was that also with 4 teeth and 5 air?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 4:35 pm

Thanks again for the fast response. When I switched to rice to buck I changed the settings. I just spoke to a dealer in my area and he asked if the fan was spinning in the right direction. Because sometimes the motors are reversable. And it hit me this problem seemed to start when I replaced the motor last year. It is a cheap oa smith rebuilt not reversable but that is all he had in stock and I could not wait for the better motor, I have 3 women in the house and they were cold as they always are. I did buy a spare dayton. I will replace the motor later this afternoon and let you know any change.

Thanks....
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 4:37 pm

And no this stoker is not new to me. Its been around almost as long as my wife, but the stoker is still warmer than my wife.... just sayin.
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: Scottscoaled On: Mon Oct 31, 2011 4:53 pm

Some women don't fire "red hot", They sorta just simmer :)
Scottscoaled
 
Stoker Coal Boiler: EFM 520x3, 700 Van Wert 800
Hot Air Coal Stoker Furnace: EFM 150, Keystoker 150
Coal Size/Type: Lots of buck

Re: EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 5:43 pm

Ok replaced motor with the new Dayton and the Dayton was reversed. The AO Smith was rotating correctly and it was reversable (but only if removed) access cover was on the inside. Any way bumped up the air to 7 and it is burning a full pot now, but seems that more than likely I have a bad gasket between the grates and gooseneck requiring more air to compensate for the loss there. I have the older style pot with the naked gooseneck. When I changed the bushing in the gooseneck I may let the gasket slip or something. I will just replace all the gaskets later in the week. Thanks for all the advise and input. I will post the results ofter I replace the gaskets.

Thanks again.......
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 5:44 pm

I hear ya stokerscot.
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: stoker-man On: Mon Oct 31, 2011 7:44 pm

Glad it's fixed. Just got electric back again.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: EFM 520 Only half pot burning

PostBy: pac-rat On: Mon Oct 31, 2011 8:01 pm

Good to hear you got your power back. You don't think about it when you have it. And you can't stop thinkin about when you don't. Especially the kids. It's like Daddy what did you do before electricity ? Whoah I aint that old. 41 aint that old now. But it was when we were kids.....
pac-rat
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: EFM 520 Only half pot burning

PostBy: franpipeman On: Tue Nov 01, 2011 7:45 am

While on the topics of motor, I have a 520 with the original motor. It has to die someday but i cant read the data plate. Can someone give me the details a proper motor replacment frame number rpm amperage and all other info needed to acquire a stand by motor. How much do they usually cost
franpipeman
 
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice

Re: EFM 520 Only half pot burning

PostBy: stoker-man On: Tue Nov 01, 2011 7:23 pm

It's a Dayton 4MA10 available from Grainger for about $80 ???
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove