Anyone have a Harman with the auto draft?

Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Wed Jul 14, 2010 1:10 am

I have a Vogelzang Norseman furnace and am working on designing and installing a thermostatically controlled draft. I don't want a draft fan. I like the looks of the Harman auto draft. I have a few ?'s regarding the harman draft and if anyone has a Harman with the auto draft and wouldn't mind answering a few ?'s or maybe taking a few pictures for me, let me know. I would appreciate it!

Ben
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

Re: Anyone have a Harman with the auto draft?

PostBy: McGiever On: Wed Jul 14, 2010 1:21 am

I don't have a Harman, but, are you referring to a bi-metal coil w/ chain controlling a hinged door flap?

I removed one like that from a 1970's Riteway Wood/Coal Stove recently.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Wed Jul 14, 2010 8:47 am

No actually the Harman auto draft is electric. It has a 24 volt wall thermostat that controls a geared motor that opens and closes the draft with the need for heat.
Ben
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

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Re: Anyone have a Harman with the auto draft?

PostBy: franco b On: Wed Jul 14, 2010 11:39 am

I would look into adapting a zone valve used on hot air furnaces.

Another way would be to use the power head from an hydronic system. The Taco power head on my system only has about 1/8 inch throw, but is powerful. With simple lever of 4 times leverage you could get 1/2 inch throw which should be enough. The Honeywell power head might have more throw. The power heads are readily available as a replacement part. Of course you would need the transformer and thermostat.
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Thu Jul 15, 2010 12:36 am

franco b, I believe that is pretty much what the Harman draft consists of. I know its a geared motor with a spring return. Power = motor turns opens draft. No Power = spring returns motor and closes draft. I would like to know what brand and model number of geared motor the harman draft uses and I would also like to look at the draft mechanism as I would like to build something like it.

Ben
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

Re: Anyone have a Harman with the auto draft?

PostBy: Robby On: Sat Jul 17, 2010 11:35 pm

I have a Harman with that exact system. I also purchased a spare (complete, motor,spring,gears etc). Tonight I don't have model# etc. but will look it up tomorrow. Not very expensive and works fine. The reason I have a spare, mine quit, and I ordered a new one before I gave it a good look over. Because it was not sealed small bits of coal and ash had jammed gears. I cleaned, SEALED and put back in service.

Robby
Robby
 
Stove/Furnace Make: Harman & Elmira
Stove/Furnace Model: SF360, TLC2000, PC45

Re: Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Sun Jul 18, 2010 12:07 am

Robby, That would be great if you could get me that information. Could I maybe talk you into taking a few pictures of your draft setup?

Thanks!
Ben
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

Re: Anyone have a Harman with the auto draft?

PostBy: Robby On: Mon Jul 19, 2010 10:19 pm

You bet.
Sorry, got tied up today, will take pictures, get numbers, etc. tomorrow and post early as I can as I am in "Mountain" time zone. Most of you guys are in bed before I read posts.

Robby
Robby
 
Stove/Furnace Make: Harman & Elmira
Stove/Furnace Model: SF360, TLC2000, PC45

Re: Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Mon Jul 19, 2010 10:52 pm

Hey Robby, where U from? I'm also in Mountain time zone. I live in the southeastern corner of Montana. Also, thank you for your willingness to take pictures, etc. It is appreciated!

Ben
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

Re: Anyone have a Harman with the auto draft?

PostBy: Robby On: Tue Jul 20, 2010 8:20 pm

Small world. I am from Priddis, Alberta, SW of Calgary way up high in the hills. 4400 ft to be exact. Your not very far away.

OK, the (Damper Actuator and link drive) is ERIE make and part #0453H0038KB00.
110V 50Hz and 120V 60Hz 6.5 watt. I think I paid about $120 for complete unit.

The electronic controls switch it on or off. When on the motor just keeps pushing (through gears) on wheel which hold damper door open. When power off spring rolls moter in reverse. I think if you keep grit out of the mechanism they last a very long time. I did not seal mine and over a year or so enough ash,grit got in to jam it. Cleaned and put back on. That was last fall.

I am trying to figure out how to inset a picture, will work on that. In the mean time take a look at HArmon site
http://www.harmanstoves.com/Browse/Stov ... al-heating

You can download the manual and there are pictures of draft door etc.

Robby
Robby
 
Stove/Furnace Make: Harman & Elmira
Stove/Furnace Model: SF360, TLC2000, PC45

Re: Anyone have a Harman with the auto draft?

PostBy: Robby On: Tue Jul 20, 2010 8:24 pm

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Robby
 
Stove/Furnace Make: Harman & Elmira
Stove/Furnace Model: SF360, TLC2000, PC45

Re: Anyone have a Harman with the auto draft?

PostBy: Robby On: Tue Jul 20, 2010 8:32 pm

I'm back.

I re-read your first post. It would be real simple to have thermostat control relay and relay supply power to damper motor. Does furnace have controls that prevent it from getting too hot?

Years ago I owned a house (cabin really) in B.C. that had a wood furnace and the draft worked exactly like that. Can't remember if it was identical, but very similar.

If you need any more pictures or info from this setup, just let me know.

Robby
Robby
 
Stove/Furnace Make: Harman & Elmira
Stove/Furnace Model: SF360, TLC2000, PC45

Re: Anyone have a Harman with the auto draft?

PostBy: McGiever On: Tue Jul 20, 2010 10:45 pm

McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Tue Jul 20, 2010 11:01 pm

McGiever, thanks for the link. I do believe that it will work for what I am doing. Thanks!
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

Re: Anyone have a Harman with the auto draft?

PostBy: bverwolf On: Tue Jul 20, 2010 11:46 pm

Robby, thanks for the pictures! I think this setup will work very well for my stove. I was wondering if you could take a few measurements for me if you wouldn't mind. The measurements I would like are:
1. The size of the draft opening.
2. The size of the idle air inlet holes.
3. Approximately how far from the bottom of the inlet does the "actuator lug" contact the door. From what I can see in the picture it looks about half way. Correct me if I'm wrong.
Also, from what I see in the pictures, the door hinges at the top, correct? Is there a spring that pulls the door closed or is the inlet cut at a bit of an angle so that good ole gravity keeps it closed? Also, approximately how far does the door open when the thermostat calls for heat? I'm guessing it isn't much as large as the door is? Also, is there a screen or something in the inlet that keeps small pieces of coal from rolling out and jamming the draft door open?
I hate to bother you any more, but would you mind taking a close up picture of the hinge area.
I really appreciate your willingness to answer my questions and go through the work of taking pictures. I really appreciate it! I am going to owe you big time!
Thanks!
Ben
bverwolf
 
Stove/Furnace Make: Vogelzang
Stove/Furnace Model: Norseman 2500

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