Experienced EFM Users

Experienced EFM Users

PostBy: billw On: Sun Nov 09, 2008 4:33 pm

This is my first heating season with the EFM. I'm currently running 3 teeth of feed. It's been warm out and have no problem keeping the house warm. At what point do I need to increase the feed rate? I know there are a lot of variables from system to system and house to house but is there a ballpark outside temp that I should start considering bumping the feed rate up to 4 or 5?
billw
 
Stove/Furnace Make: EFM 520
Stove/Furnace Model: GOODBYE OIL COMPANY

Re: Experienced EFM Users

PostBy: stoker-man On: Sun Nov 09, 2008 4:45 pm

I wouldn't run at any less than 4 teeth, but if the ash ring looks good and you can keep up with the demands of your house, there is no need to move up the feed rate.
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: Experienced EFM Users

PostBy: lincolnmania On: Sun Nov 09, 2008 4:51 pm

i have a efm hot air furnace......i'm running it at 3 clicks right now.......when it gets colder i will increase it to 4 or 5 clicks (i heat a poorly insulated 3200 sq ft garage with a tall celing......only that bubble wrap looking foil insulation on the rafters) the old girl burns well except for when she has to idle alot on warm days and i get unburnt coal
lincolnmania
 
Hot Air Coal Stoker Furnace: efm af-150 1982
Hot Air Coal Stoker Stove: alaska kodiak stoker 1986
Hand Fed Coal Stove: warm morning 1980 kenmore

Re: Experienced EFM Users

PostBy: coal berner On: Sun Nov 09, 2008 5:28 pm

You Might not have to 3 teeth is 7.5 lbs a hr 4 is 10 lbs per hr 5 is 12.5 lbs per hr 6 is 15 lbs per hr
7 is 17.5 lbs per hr 8 is 20 lbs per hr 9 is 22.5 lbs per hr 10 is 25 lbs per hr
It will depend on your house at the heat loss it has. You will know if the stoker starts to run more often to keep up with
the heat demand and how much coal you will be using. Also how many btu's per lb that is in the coal that you are using .
The only true way to know how much coal / btu's you will need is to do a heat loss calculation on your house .
You can get a ruff idea if you used oil before take the amount of oil that you used to heat with in the passed .
180 gals of oil = 1 ton of coal ruffled it should give you how many tons of coal you will need to heat with .
Also if you have to bump the Aquastat up more you might want increase the feed rate to maintain the water temp you want. There is Probably a hundred other factors that go into this but these are a few that might help you.
The Stoker will tell you just by how much more it has to run to keep up & how much coal you are going threw.
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: Experienced EFM Users

PostBy: Pa Dealer On: Mon Nov 10, 2008 8:16 am

5teeth 4 1/2 air great setting for most heating demands when burning rice.
Pa Dealer
 
Stoker Coal Boiler: EFM 520 DF
Coal Size/Type: Rice
Other Heating: Keystoker
Stove/Furnace Make: EFM DF 520
Stove/Furnace Model: Keystoker

Re: Experienced EFM Users

PostBy: e.alleg On: Wed Nov 19, 2008 7:54 pm

You'll know when to increase the feed when the boiler temp drops below acceptable levels and the stoker is running 100% of the time and the room thermostat is still calling for heat. Basically if your house is warm the feed rate is good enough, if it takes a long time to warm up your house then increase the feed/air. Too little can cause big problems like fire in the worm tube. A tight well insulated house might only need 3 teeth.
e.alleg
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520