520 hopper fumes and CO problem

520 hopper fumes and CO problem

PostBy: Idomeneus On: Mon Dec 09, 2013 9:52 am

I have a 1905s era efm 520. Replaced my feed tube this year after the other corroded. My 55 gallon metal drum is only about a foot from the boiler. I am getting constant blow back into my hopper drum. Feed tube/pipe is hot and this is sending fumes and co into the house. It is also quick drying the coal and causing sulphur smell. I have cleaned the holes on the feed pipe repeatedly, lowered the air flow, had the chimney cleaned a serviced. Draft is good for main fire chamber and for my oil boiler that serves as a back-up. I just can't solve the problem. Went away this weekend and came home to CO detectors going off and strong odors in the house. I can smell that it is coming form the hopper and where the feed pipe enters the hopper. I noticed a week ago that the metal hopper had corroded under the feed pipe and there were several large holes. I thought that was the problem so I patched them. It ran fine for a few days then back to crap.

Any ideas? I plan on replacing the hopper with a plastic drum/trashcan. Should I extend the auger and feed pipe further from the boiler? Never had that problem the last 2 years. Should I keep a lid on the hopper? Is there some other thing I am missing? Thanks for the help.
Idomeneus
 
Stoker Coal Boiler: 1960s EFM 520
Coal Size/Type: Rice
Other Heating: Oil

Re: 520 hopper fumes and CO problem

PostBy: Rob R. On: Mon Dec 09, 2013 9:59 am

Check the draft, make sure the flue pipe is clean, and back the feed/air down to 4. Hopefully that will temporarily resolve the fumes.

The long term fix is a longer auger.

Plastic drums work well.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: 520 hopper fumes and CO problem

PostBy: Rob R. On: Mon Dec 09, 2013 10:01 am

Are you burning rice or buck?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: 520 hopper fumes and CO problem

PostBy: Idomeneus On: Mon Dec 09, 2013 10:16 am

Rice

Pipes are all clean. Had chimney professionally cleaned and fixed. Took apart all exhaust pipes and vacuumed out. No odor or CO from exhaust. It is all coming from the hopper
Idomeneus
 
Stoker Coal Boiler: 1960s EFM 520
Coal Size/Type: Rice
Other Heating: Oil

Re: 520 hopper fumes and CO problem

PostBy: Idomeneus On: Mon Dec 09, 2013 10:18 am

And I am already burning under 4.
Idomeneus
 
Stoker Coal Boiler: 1960s EFM 520
Coal Size/Type: Rice
Other Heating: Oil

Re: 520 hopper fumes and CO problem

PostBy: Rob R. On: Mon Dec 09, 2013 10:26 am

Have you checked the draft with a gauge when the stoker was running? Does it at least suck a match flame through the hole in the fire door?

You cleaned the holes in the auger pipe, but did you check the area in the pot right above those holes?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: 520 hopper fumes and CO problem

PostBy: Idomeneus On: Mon Dec 09, 2013 10:32 am

No, I haven't. I plan on taking it all out tonight and cleaning the inside of the pipe. Wondering if it is clogged with fines. Just weird that I have burned for 2 years with no problems and now constant problems. The only thing that changed was the feed pipe.
Idomeneus
 
Stoker Coal Boiler: 1960s EFM 520
Coal Size/Type: Rice
Other Heating: Oil

Re: 520 hopper fumes and CO problem

PostBy: titleist1 On: Mon Dec 09, 2013 10:41 am

i am not an efm guy by any stretch, but i think i remember reading on here that issues like yours can happen if the holes on the feed pipe are not on the top? can one of the efm guys confirm / correct this?
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: 520 hopper fumes and CO problem

PostBy: whistlenut On: Mon Dec 09, 2013 10:55 am

That pipe has a notch that aligns with a cast pin . MANY times the pin has been broken off, so extreme care is required to make sure the holes in the pipe are vertical, aligned with the top portion. This may not the case, however it is a good time to check it out.
whistlenut
 
Stoker Coal Boiler: AA130's,260's, AHS130&260's,EFM900,GJ&VanWert
Hand Fed Coal Boiler: Franks Boiler,Itasca415,NYer130,Van Wert
Hot Air Coal Stoker Furnace: Yellow Flame
Hot Air Coal Stoker Stove: Alaska-4,Keystoker-2,
Hand Fed Coal Stove: Alaska,Gibraltor,Keystone,Vc Vigilant 2
Hand Fed Coal Furnace: Van Wert, NYer's, Ford,Jensen.
Coal Size/Type: Rice,Buck,Pea,Nut&Stove
Other Heating: Oil HWBB

Re: 520 hopper fumes and CO problem

PostBy: stoker-man On: Fri Dec 13, 2013 6:26 am

The short pipe had two notches, so I could be put in with holes up or down. I had them redesign to only one notch so you couldn't make a mistake and put the holes on the bottom. Don't know if they did. That was 3 years ago.
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: 520 hopper fumes and CO problem

PostBy: cArNaGe On: Fri Dec 13, 2013 9:28 pm

Mine always did that too. First I had to keep it full...... Second I put a cover over the barrel. Third I finally finished my coal bin and put the extension into the bin.
cArNaGe