Feed Rate

Is a boiler jacket the fiberglass insulation on the sheet metal? Somehow I knew those cast iron radiators were the way to go.

lincolnmania wrote:when it gets really bitter cold outside, i have to increase the feed to 6 teeth (iirc the max on my stoker) to get the shop above 60 degrees.......but i'm running a hot air furnace in a large shop....i know the af150 is grosly undersized, but it was free lol......i can only dream of someday ripping out the floors and putting in floor heat and some overhead heat exchangers and a efm boiler......gotta keep the building from falling in first.

The Max feed rate on the AF 150 is 7 teeth 17.5 lbs per hr 150k max BTUH with the air at 6
6 teeth feed Rate is 15lbs per hr with 5 1/4 air for 135 K BTUH
your chimney should be 8" x 8" x 15' Low speed blower CFM is 1800 blower size is 11 x 10 stoker motor is 1/8 HP
Blower motor is 1 HP Filter size 2 of them 16 x 25 x 1

billw wrote:Is a boiler jacket the fiberglass insulation on the sheet metal? Somehow I knew those cast iron radiators were the way to go.

Yes The Metal covers are the Jackets The insulation goes onto the boiler they use two steel flat bands to hold it on You
can buy them threw efm. Or you can use metal wire You can also put the insulation on the inside of the Jackets use a spray on Adhesive on the Jacket and push the Insulation on then screw the Jackets on to the base & boiler

More important than the feed on the AF150 is that you don't exceed 70º difference between the inlet and outlet air, or you can warp/ruin the heat exchanger.

I kept the feed rate at 4 teeth. Got up this AM to my house at 71. The boiler temp was at 190 and idling because there wasn't a call for heat, checked the ashes slightly more than when it's in the 30's. All in all this EFM is fricking great.

I too have been holding at 4 teeth feed rate. The unit is running 6 hours in 12 hour duration in the fridgid night hours (-6 degrees). About 4 hours daytime 12 hour duration. I have a clock that is plugged in to the stoker to read stoker run times. House is 10 year old 2300 sq. ft. with lots of windows including heated sun room. Just finished 3rd pallet of coal - 3.6 tons, have 3 pallets left till empty. This boiler is great but not fun anymore, nothing left to do but watch the blue ladies dance. Awsome unit!

stoker-man wrote:More important than the feed on the AF150 is that you don't exceed 70º difference between the inlet and outlet air, or you can warp/ruin the heat exchanger.

well stoker man he ran it 24/7 for 3 years with out a timer or a fan limit switch control what do you think the heat exchange looks like

Don't know.

But we have replacements if he needs one.

Hello All,

I've been reading through these post and I'm confused about something. The person who I bought my boiler from told me, and set my teeth at 6 teeth. He said that when that thumb screw is in the 12 noon position, its 6 teeth. With this cold weather,the boiler was not making enough heat. Upon reading this post, I'm finding out that my boiler was set at 4 teeth. I did put my hand in the motor and spun the wheel and counted the number of clicks by the blue thing on the left (10pm position). It went up and down 4 times. I changed it t 5 clicks and set the air at 4.5.

Here's what's got me confused. The efm manual says that you can go as high as 10 or 11 teeth, but it looks like that thumb screw can only go as far as 6 or 7 teeth. Something is not adding up. Are the teeth measured by the number of times that blue thing goes up and down, or by the number of teeth being pushed by the black flapping thing near the curved shaped metal piece.

I'm sorry that my terminology is terrible. Thanks.

Leo

Here Leowis

I'm at 6 teeth 5.5 air

Either way Leo, counting the feed pawl clicks or the check pawl clicks, they should be the same or close. You should be able to get 10 clicks out of any drive device. At that high rate, you probably need the larger burner ring.

Hey Leo. Just for sHeets and giggles, would you look for numbers on the arm that goes around in circles on your stoker unit. I bet it has the numbers S15 on it. If it does then the part you need will have S20 on it. The part you have is about 5/16" shorter than the one you want. The extra length makes up the 3 teeth difference and gives you the full 10 teeth feed rate. Good luck and stay warm Scott

Oh, I do not need 10 teeth. 5 teeth seems to be doing the job. I was just curious as to how the stoker can go up to 10 teeth if the thumb screw seems to max out at 6 or 7. Thank you.

I guess my explanation didn't cover............ Scott

http://nepacrossroads.com/download/file ... &mode=view

If your arm looks like that, you should be able to get ten teeth.