Harman combustion blower and stoker gearmotor

Harman combustion blower and stoker gearmotor

PostBy: steinkebunch On: Sat Feb 16, 2008 6:19 pm

Still looking into the impossible? task of building a stoker.

Can anyone tell me the model # and mfg. of the combustion blower, as well as the stoker gearmotor? Or RPMs, etc?

Thinking about buying a Coal-trol and the motors, and building the grates, stoker system.

Thanks,

Steinke
steinkebunch
 
Stove/Furnace Make: Homemade Bituminous Hand-Fed
Stove/Furnace Model: Prill underfed stoker Model M8

Re: Harman combustion blower and stoker gearmotor

PostBy: scrubber On: Sat Feb 23, 2008 3:10 pm

I can give you some info on the combustion & distribution blowers...but the gearmotor I can't get to during the heating season since it's under the hopper.

Combustion blower FASCO model B75 (7021-2367) 75 CFM

Distribution blower FASCO Model 50752-D500 (2860 RPM/135 CFM)

Hope this helps you out.
scrubber
 
Stove/Furnace Make: Harmon
Stove/Furnace Model: Magnum stoker

Re: Harman combustion blower and stoker gearmotor

PostBy: Jerry & Karen On: Sat Feb 23, 2008 9:13 pm

Hi Steinke,
I would stay away from the big combustion fan. With the soft coal your going to blow the fire up into the hopper. Better start off with a 31cfm or something in that area. I've played with it (soft coal) a few times. Better off burning it out in a concrete garage before testing it in your house. Keep your oxygen (burn area) 6" away from your hopper, and make sure your exhaust vent pipe is big enough to handle the gases.
Jerry
Jerry & Karen
 

Visit Lehigh Anthracite

Re: Harman combustion blower and stoker gearmotor

PostBy: WNY On: Sun Feb 24, 2008 8:12 am

My small combustion blower is a Dayton 4C760 (31 CFM).
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Re: Harman combustion blower and stoker gearmotor

PostBy: Highlander On: Sun Feb 24, 2008 6:05 pm

The stoker motor is a Dayton (Grainger) 6Z075, 1/80Hp, 4.5RPM, 100 In# torque, PSC, Ball and needle bearing. Here is a link to it:

Not sure what you plan on building, the Harman uses a solid aluminum pusher block to push the coal up a ramp and onto the burn plate, kind of a cross between an undrfed stoker such as an EFM or Van Wert and a carpet stoker such as a Keystoker.

You may be better off looking for a used unit that you could scavenge the parts you need.

Hope this helps
Last edited by Richard S. on Fri Dec 13, 2013 6:38 am, edited 1 time in total.
Reason: <removed dead link>
Highlander
 
Stoker Coal Boiler: Harman VF3000
Hand Fed Coal Stove: Vermont Castings Resolute
Coal Size/Type: Rice
Stove/Furnace Make: Harman
Stove/Furnace Model: VF3000 Stoker Boiler

Re: Harman combustion blower and stoker gearmotor

PostBy: steinkebunch On: Sun Feb 24, 2008 6:34 pm

Highlander: That's exactly what I was needding. You are probably right about the salvage stuff. Didn't know about the solid aluminum pusher block. Thanks for the input.

Jerry: I think you are right about the blower and air. In my handfed, I can have one side of the firebox completely dead due to going too long without loading. But as long as I get some of the new coal to catch, it soon spreads to the rest of the firebox. I definitely want to avoid a fire in the hopper. Seems like you'd want to have a variable speed control on the combustion fan to fine tune it.

I was also thinking that if you could get the pusher block of the Harman to stop it's stroke in the correct position each time (fully forward), you could effectively block the path to the hopper and avoid any chance of burnback. Not sure how you'd wire that to ensure that happens though. Might have to scrap the timer idea, or do some fancy ladder logic or something.

But I'm still thinking a setup like the Harman Magnum has the best chance of working with bituminous coal, due to its somewhat underfed design. And I think all the truly underfed stokers on the market are too ugly to set in my family room. Maybe I need to mount an underfed wil-burt or stokermatic pot in my stove body I built.

Thanks all for your help. I'll share all failures, experiments, successes, etc.

Lonnie
steinkebunch
 
Stove/Furnace Make: Homemade Bituminous Hand-Fed
Stove/Furnace Model: Prill underfed stoker Model M8

Visit Lehigh Anthracite