Annual Maintenance and Cleaning of the DF520 Boiler

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.
User avatar
Rob R.
Site Moderator
Posts: 11363
Joined: Fri. Dec. 28, 2007 4:26 pm
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 Sat. Jan. 19, 2013 3:53 pm

This is the motor that I bought and put on my EFM:

http://www.marathon-motors.com/4782-5KH39BN5017U- ... m-4782.htm

Note that the picture on the website is not correct, the motor has a closed face like coal berner mentioned.

elindable
New Member
Posts: 7
Joined: Thu. Dec. 05, 2013 12:08 am
Stoker Coal Boiler: EFM DF520-S20 Serial 91676
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: DF520
Location: Coaldale Pennsylvania

Post Tue. Dec. 31, 2013 11:56 am

Are the baffles too heavy to remove with one hand. It might be a challenge for me to get in there with 2 hands from the fire door. Am I missing something or is there a preffered method to removing the baffles?
Thanks.

User avatar
vermontday
Member
Posts: 328
Joined: Wed. Oct. 22, 2008 8:27 pm
Stoker Coal Boiler: EFM 520
Location: Bennington, VT

Post Wed. Jan. 01, 2014 6:36 pm

The steel baffles are just light enough to handle with one hand.

However, they can be very difficult to get off the hooks. EFM uses large diameter rod for the hooks (don't know why) that on my new boiler were slightly off angled. This resulted in having to use a crowbar to get them off. The vertical section of the hook is also longer than it needs to be, again making it difficult to remove the baffles.

I corrected this by cutting off the excess vertical hook section (see attached picture) with an angle grinder. Be sure to wear good eye protection when doing this, it gets pretty cozy in there.

I also welded a bolt on each one as a handle. If I had it do over again, I would weld the handle higher up on the baffle for better balance.

It is now easy to get the baffles off the hooks.
Attachments
IMG_4990.JPG
IMG_4995.JPG
IMG_4987.JPG
US dependence on foreign oil has created the greatest transfer of wealth in history.

Visit Alternate Heating Sytems

elindable
New Member
Posts: 7
Joined: Thu. Dec. 05, 2013 12:08 am
Stoker Coal Boiler: EFM DF520-S20 Serial 91676
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: DF520
Location: Coaldale Pennsylvania

Post Wed. Jan. 01, 2014 7:34 pm

Thank you for the reply.
I like how you use those giant bags as the hopper. Fantastic idea.
Thanks again.

User avatar
vermontday
Member
Posts: 328
Joined: Wed. Oct. 22, 2008 8:27 pm
Stoker Coal Boiler: EFM 520
Location: Bennington, VT

Post Wed. Jan. 01, 2014 7:41 pm

Below are some pictures of how much moisture a boiler can pick up inside during a few weeks in a humid summer like last year.

Although I prefer running the EFM through the summer for domestic hot water, I was worried about my oil burner oil setting up in the gun or the oil going bad in the tank, (having not burned a drop in over a year and 1/2), so I ran the oil burner for DHW.

Upon shutting down the EFM, I cleaned it, put a 100 watt light in through the exhaust breech hole, covered the breach hole with foil, stuffed rags in the combustion blower input and even put a piece of tape over the front door flame inspection hole.

I also hung a note on the power switch to remember to take the rags out, for the old geezer (me) that can't remember what he did yesterday!

I also put a large pail of "Damprid" moisture absorbent into the fire box. You can buy it at Home Depot.

When I took the "Damprid" bucket out and set it on my picnic table, it was 1/3 full of water. Again, water and coal ash make a perfect recipe for corrosion, so I am glad I took the extra steps.
Attachments
Bennington-20130914-00931.jpg
Tape sealing peep hole.
Bennington-20130914-00932.jpg
Rags blocking combustion blower input.
Bennington-20130914-00934.jpg
Damprid bucket on burn pot.
Bennington-20130914-00933.jpg
Taking Damprid bucket out.
Bennington-20130914-00936.jpg
Damprid bucket 1/3 full of collected water.
US dependence on foreign oil has created the greatest transfer of wealth in history.

User avatar
McGiever
Member
Posts: 6008
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Wed. Jan. 01, 2014 9:29 pm

Check this out, at only 13 watts it works for pennies a day.

It's not just about some heat, this does cause a gentle circulation of the air within which some other items can't do. :)

use for Stove Dehumidfier
SLOW AND STEADY WINS THE RACE

Visit Alternate Heating Sytems

User avatar
SMITTY
Member
Posts: 11915
Joined: Sun. Dec. 11, 2005 12:43 pm
Stoker Coal Boiler: Patriot Coal - (custom built by Jim Dorsey, Taunton MA - RIP 4/18/13)
Hand Fed Coal Stove: Harman Mark III (SOLD!)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler
Location: West-Central Mass

Post Wed. Jan. 01, 2014 9:40 pm

I'd need a 6 gallon bucket of Damprid just for my Mark III in this place ... :lol:
The laws that forbid the carrying of arms...disarm only those who are
neither inclined nor determined to commit crimes. ...Such laws make things worse
for the assaulted and better for the assailants, they serve rather to
encourage than to prevent homicides, for an unarmed man may be attacked with
greater confidence than an armed man."

- Thomas Jefferson, quoting 18th century criminologist Cesare Beccaria in "On
Crimes and Punishment."

daluds
Member
Posts: 282
Joined: Fri. Jun. 20, 2008 9:27 am
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Post Sun. Jan. 05, 2014 6:55 pm

Nice summary with details. Thanks.

elindable
New Member
Posts: 7
Joined: Thu. Dec. 05, 2013 12:08 am
Stoker Coal Boiler: EFM DF520-S20 Serial 91676
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: DF520
Location: Coaldale Pennsylvania

Post Sun. Oct. 12, 2014 2:26 pm

I have the older gear box. Where can I find 20w machine oil? Is there something equivalent I can purchase retail.
Thank you

Post Reply

Return to “Stoker Coal Boilers Using Anthracite (Hydronic and Steam)”