Rebuilding EFM DF-520 Project

Re: Rebuilding EFM DF-520 Project

PostBy: EarthWindandFire On: Tue Feb 08, 2011 9:27 pm

Very nice job!
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Rebuilding EFM DF-520 Project

PostBy: coal berner On: Tue Feb 08, 2011 9:33 pm

gwjwbw wrote:
coal berner wrote:
DVC500 at last wrote:Do you need any diagonal braces in the base, just to keep it from twisting? Just a thought...
It appears to have great compression strength, but I'm wondering about tension, albeit, it should be low.

None of the EFM bases had or has diagonal braces don't need them .
This one he made is over kill compare to factory bases



Overkill??????
we all do things the way we want it done. And, it not overkill to me

Your right build it the way you want I was not criticizing your base .
Just pointing out that you did not have to use all that heavy steel and not everyone has a forklift to move one around :lol:
Moved enough out of basements to know how heavy the efm made ones are especially the old ones .
You did a good Job You could cut back on the flue tho it will make it easier to clean out the back of base bottom when you stick your hand thur the flue opening with the shop Vac.
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: Rebuilding EFM DF-520 Project

PostBy: stoker-man On: Tue Feb 08, 2011 10:51 pm

Gerard, just for effect, you should have rented a 10 story crane and lifted the base. Or have 10 guys standing on the forklift counterweight to balance it out.
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: Rebuilding EFM DF-520 Project

PostBy: gwjwbw On: Tue Feb 08, 2011 11:02 pm

stoker-man wrote:Gerard, just for effect, you should have rented a 10 story crane and lifted the base. Or have 10 guys standing on the forklift counterweight to balance it out.

ah man, the base just a little heavier then the boiler, but not much. lol
ummmm, crane??? that a great idea, i rent one for a hour when I'm ready
gwjwbw
 
Stove/Furnace Make: EFM DF520

Re: Rebuilding EFM DF-520 Project

PostBy: coal berner On: Wed Feb 09, 2011 11:26 am

gwjwbw wrote:ok people, the LAST base update
are you ready?????? :D

What a diff from the old one to the new one.
Now tomm, gonna fire up the soker in the base and see what happen :shock:
Gerard

Don't forget the ash door Handel and latch on the inside door frame also the door gasket
and the side panels need to be sealed up also around the auger tube were it goes thur base hole and the bin end
the boiler to base must be sealed up as well boiler sits down 1.5 " on inside base lip seal around the whole space between
the boiler and base .
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: Rebuilding EFM DF-520 Project

PostBy: Wood'nCoal On: Thu Feb 10, 2011 11:17 pm

Nice job on the new base!
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: Rebuilding EFM DF-520 Project

PostBy: gwjwbw On: Fri Feb 11, 2011 6:34 am

Thank you for all the nice comment.
I was going to fire up the stoker this week, but after some looking at the stoker and what parts it need, going have to wait till all the new part are install.
Gerard
gwjwbw
 
Stove/Furnace Make: EFM DF520

Re: Rebuilding EFM DF-520 Project

PostBy: coal berner On: Fri Feb 11, 2011 12:16 pm

gwjwbw wrote:Thank you for all the nice comment.
I was going to fire up the stoker this week, but after some looking at the stoker and what parts it need, going have to wait till all the new part are install.
Gerard

Good call on replacing parts before you fire it up Make that call for Parts
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: Rebuilding EFM DF-520 Project

PostBy: europachris On: Fri Feb 11, 2011 2:16 pm

gwjwbw wrote:ok people, the LAST base update
are you ready?????? :D

What a diff from the old one to the new one.
Now tomm, gonna fire up the soker in the base and see what happen :shock:
Gerard


I'd suggest adding a cleanout "hatch" to the flue outlet section of the base. Two reasons why I did and I'm glad I did: 1) You don't have to pull the flue pipe off to clean the base out. Sheet metal screws only screw so many times into the same hole..... :roll: 2) When cleaning out the boiler tubes, the still-connected flue sucks up all the fine ash and soot that doesn't fall to the bottom of the base, keeping it out of your face and boiler room.

In my case, I need to give my boiler a brushing every few weeks to maintain peak heat transfer. It builds up a coating pretty quickly due to the small amount of soot helping the fly ash to stick to the cool boiler surfaces. It definitely won't be as frequent of a requirement with anthracite, but I still think it's a nice feature.

I just cut a hole, then cut a bigger piece than the hole for a cover, and then welded two angled tabs on the bottom to hook onto the edge and welded a bolt from the inside of the base to fasten the cover with a wing nut. It's all flat enough that no gasket or sealant is required.
Image
europachris
 
Stove/Furnace Make: EFM 350/Iron Fireman
Stove/Furnace Model: Custom bituminous burner

Re: Rebuilding EFM DF-520 Project

PostBy: gwjwbw On: Fri Feb 11, 2011 10:48 pm

Man, your weld job look so nice, then again, it my first time welding and didnt have time to pratice, wish I have
what kind of paint did you use?
Thank, Gerard
gwjwbw
 
Stove/Furnace Make: EFM DF520

Re: Rebuilding EFM DF-520 Project

PostBy: 009to090 On: Fri Feb 11, 2011 11:24 pm

gwjwbw wrote:Man, your weld job look so nice, then again, it my first time welding and didnt have time to pratice, wish I have
what kind of paint did you use?
Thank, Gerard

Gerard, looks like your just trying to weld too fast. Move the tip slower. Take your time. Enjoy your project :up:
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: Rebuilding EFM DF-520 Project

PostBy: gwjwbw On: Sat Feb 12, 2011 8:35 am

Yes, the welder in the shop kept on yelling at me avery 5 min to slow down,lol
DVC500 at last wrote:
gwjwbw wrote:Man, your weld job look so nice, then again, it my first time welding and didnt have time to pratice, wish I have
what kind of paint did you use?
Thank, Gerard

Gerard, looks like your just trying to weld too fast. Move the tip slower. Take your time. Enjoy your project :up:
gwjwbw
 
Stove/Furnace Make: EFM DF520

Re: Rebuilding EFM DF-520 Project

PostBy: europachris On: Sat Feb 12, 2011 9:35 am

gwjwbw wrote:Man, your weld job look so nice, then again, it my first time welding and didnt have time to pratice, wish I have
what kind of paint did you use?


I'm not a welder, either, but I have had a bit of practice. Here is the base before paint:
Image
As you can see, all the welds are on the INSIDE of the base and I didn't weld the outside corners. I didn't go crazy with the weld, either - in this case more is NOT better. I noticed right away how the sheet metal panels were sucking in the angle iron frame like an overtightened drum head, and backed off the amount and length of welds.

Then, I used high temp RTV to seal all the joints after painting it with Rustoleum BBQ black (quart can) and a 3" wide short nap trim roller. It worked out fabulously.

Oh - when it comes to welding, the grinder is your friend! :oops: I also find I'm a far better stick welder than MIG welder. I had to weld up a big set of steel supports at work - 3x6x3/16" rect. tube, 3x3x3/16" sq.tube, 1/2" plate, etc. I was making a decent job of it with a Miller Shopmaster 300A mig, but when I had to weld some 1/4" angle iron brackets on, I brought in my rods in set the welder up for stick. Them thar welds were purty! But then I turned around and had to weld a 14 ga. sheet metal box together for another project and THEN the MIG was my friend. Turned it way down and cooked right along.

Here's my welder ($110 Craigslist score) before I made a little cart for it. I learned stick on an old Marquette AC buzz box, and lemme tell you, once you've run DC stick, you won't bother with AC again. 1/8" 7014 rod is pushing max amps on DC, so I need to watch my duty cycle, and I'd have to run AC for rods larger than 1/8", but DC covers 99.9% of what I need to do. I even welded a 1/4-20 nut standing on edge to the outside of 1/2" EMT conduit using 3/32" 6011 rod.
Image
europachris
 
Stove/Furnace Make: EFM 350/Iron Fireman
Stove/Furnace Model: Custom bituminous burner

Re: Rebuilding EFM DF-520 Project

PostBy: gwjwbw On: Sat Feb 12, 2011 12:23 pm

The opening on the boiler for DHW coil, I have a 5 gpm coil now and going with a 7gpm, do I need to make the opening bigger?
I snaped off 3 of the 8 bolts that hold the coil, now going to cut them all out and weld a flange onto the boiler and use nut and bolt for the coil
Gerard
gwjwbw
 
Stove/Furnace Make: EFM DF520

Re: Rebuilding EFM DF-520 Project

PostBy: europachris On: Sat Feb 12, 2011 1:50 pm

gwjwbw wrote:The opening on the boiler for DHW coil, I have a 5 gpm coil now and going with a 7gpm, do I need to make the opening bigger?
I snaped off 3 of the 8 bolts that hold the coil, now going to cut them all out and weld a flange onto the boiler and use nut and bolt for the coil
Gerard


Welding up a base and welding on the boiler are two rather different requirements, i.e. you can almost get away with anything and the base won't fall apart, but welding on a boiler, while not especially difficult in the specific area of the DHW coil, takes more skill and proper knowledge of welding.

I cut out my entire coil mounting area as it was badly eaten away from a long time leak. Since I have no need for a coil with my setup, I cut a solid plate and welded it in place - proper joint prep is mandatory, i.e. proper gap, bevels, etc. as well as weld rod selection (using stick in my case) and welder setup. I have just enough experience and practice to be comfortable doing the repair, along with the right equipment.

I don't know what sort of welder you are using - but a little 110V MIG welder (or any other 110V welder for that matter) isn't going to do it on 1/4" plate and be able to get any sort of decent weld penetration, regardless of what the welder is "advertised" to do. Minimum MIG requirement would be a Hobart Handler 187, and it will be balls to the wall on 1/4" material. A friend of mine has a Miller 155 flux core (220V) welder that does a nice job, but again, it's maxed out for 1/4" and good penetration.
europachris
 
Stove/Furnace Make: EFM 350/Iron Fireman
Stove/Furnace Model: Custom bituminous burner