1 or 2 Coils in Harman III

Modern and vintage hand fired coal stove are similar to a wood stove and in some cases can burn either. They need to be regulated and fed by hand usually every 12 to 24 hours depending on your usage. They require no power to operate making them ideal for rural settings with long power outages.
Post Reply
TCMW
New Member
Posts: 12
Joined: Fri. Sep. 14, 2012 5:02 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: MARK III

Post Sat. Oct. 13, 2012 7:32 pm

Justed got a Harman III.

Want to use the 21T hot water coil. http://www.hilkoil.com/product.htm
Have a 200btu oil boiler with 80gal phase III indirect water heater, three zones and six people in Conn..
I'm gonna pipe the water to the boiler with a three speed cicr.

No BTU rating on the 21T coil. Wondering if 1 is too little or 2 is too much.

Also if anyone is running Harman III which size coal they like best.

Many Thxs Sam

User avatar
Cap
Member
Posts: 1581
Joined: Fri. Dec. 02, 2005 10:36 pm
Hand Fed Coal Stove: Harman SF 250, domestic hot water loop, heat accumulator
Coal Size/Type: Nut and Stove
Other Heating: Heat Pumps
Location: Lehigh Twp, PA
Contact:

Post Sat. Oct. 13, 2012 8:06 pm

Nut coal works best with that shaker system. You could even use stove coal. I am not a big fan of pea coal but your Mark III could use pea too.
I'd go with the biggest coil or most coil I could fit. The single U shaped coil may not be enough, speaking of which, I have a new unused U-shape coil, SS 1" M NPT ends I'd part with if anyone is interested.
Cap
Lehigh Twp.
Northampton Co., PA

TCMW
New Member
Posts: 12
Joined: Fri. Sep. 14, 2012 5:02 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: MARK III

Post Sun. Oct. 14, 2012 9:12 pm

Thxs Cap for the advise.

Read some posts today on how the coils pitted bad for smitty. gonna have to passivate them with naval jelly before install and stop any condensation. wonder if I have them chrome plated first?

Still havent setup the 6"flue. wondering about masonry now?

Visit Hitzer Stoves

User avatar
Bootstrap
Member
Posts: 154
Joined: Sun. Jan. 08, 2012 10:24 pm
Stove/Furnace Make: Hitzer
Stove/Furnace Model: 30-95
Location: Windsor locks, CT

Post Tue. Oct. 16, 2012 8:08 am

Here's a question about the coil that goes into that stove, can you fab one out of iron pipe? The same kind of pipe used for natural gas or propane lines?
I pick coal up and put it down.............in my stove!

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 Tue. Oct. 16, 2012 9:45 am

Steer clear of Hilkoil - there's another company out there with MUCH BETTER ethics & products. The name escapes me at the moment but I'm sure you'll find it in the links below somewhere ...

Don't say I didn't warn you ... and be sure to click on the link to the other thread within this one: Interesting Info for Those Looking to Purchase Hilkoil Coils
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."

User avatar
EarthWindandFire
Member
Posts: 1457
Joined: Sat. Dec. 18, 2010 12:02 pm
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Other Heating: Oil Furnace and Kerosene Heaters.
Location: Connecticut

Post Tue. Oct. 16, 2012 1:26 pm

Hi Bootstrap,

Yes, you could make a coil out of iron pipe. The water jacket in my Hitzer 75 is made out of black pipe and has little to no rust at all on it after 30 years. In fact, maybe iron pipe is better, due to wall thickness, than stainless?

You can find pictures of my stoves water jacket under the title Hitzer boiler.
Mark

Inflation is the Grim Reaper to prosperity.
Printing money without a gold standard is the crime of counterfeiting.
The bitterness of poor quality lingers long after the sweetness of low price is forgotten.
Mr. McGee, don't make me angry. You wouldn't like me when I'm angry.
Si vis paceum, parabellum.

Visit Hitzer Stoves

TCMW
New Member
Posts: 12
Joined: Fri. Sep. 14, 2012 5:02 pm
Stove/Furnace Make: Harman
Stove/Furnace Model: MARK III

Post Tue. Oct. 16, 2012 7:05 pm

Thxs guys for the input.

From what I have read and discussed I like the idea of buying 316 stainless elbows 150#(7.00ea x6) & nipples.

Then apply the Passivation jelly and install.
Attachments
316_PIPE Model (1).pdf
(47.76 KiB) Downloaded 24 times

User avatar
Cap
Member
Posts: 1581
Joined: Fri. Dec. 02, 2005 10:36 pm
Hand Fed Coal Stove: Harman SF 250, domestic hot water loop, heat accumulator
Coal Size/Type: Nut and Stove
Other Heating: Heat Pumps
Location: Lehigh Twp, PA
Contact:

Post Tue. Oct. 16, 2012 8:59 pm

I like the sch 40 ( or is it sch 10 ) pipe manifold, but why use petroleum jelly? I'd use good quality neverseize.
Buy 316 if you can find it.
Cap
Lehigh Twp.
Northampton Co., PA

Post Reply

Return to “Hand Fired Coal Stoves & Furnaces Using Anthracite”