RC Vs M Barometric Damper

Post Reply
Bob
Member
Posts: 304
Joined: Sun. Mar. 18, 2007 11:28 am
Stoker Coal Boiler: AHS 130
Coal Size/Type: Pea/Anthracite
Location: Schuylkill County

Post Sun. Feb. 10, 2008 8:25 am

What, if any, are the advantages of the M barometric damper over the RC? It appears that the M type costs about twice as much and the Field literature talks about precise control of draft. Anyone have experience with the M type--or both types?

User avatar
CoalHeat
Site Moderator
Posts: 8332
Joined: Sat. Feb. 10, 2007 9:48 pm
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Baseburners & Antiques: Sears Signal Oak 15 & Andes Kitchen Range
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert
Location: Stillwater, New Jersey

Post Sun. Feb. 10, 2008 8:30 am

My oil fired furnace has the type M, My opinion is the RC works fine for coal applications.

http://www.fieldcontrols.com/draftcontrol.php#dctop

User avatar
coalkirk
Member
Posts: 4716
Joined: Wed. May. 17, 2006 8:12 pm
Stoker Coal Boiler: 1981 EFM DF520
Hand Fed Coal Stove: Jotul 507 on standby
Coal Size/Type: Lehigh anthracite/rice coal
Location: Forest Hill MD

Post Sun. Feb. 10, 2008 8:47 am

I had the RC and converted to the M. Really no difference except the weight setting on the M is alittle more sensitive. Bottom line is use which ever one is least expensive.


User avatar
coaledsweat
Site Moderator
Posts: 9918
Joined: Fri. Oct. 27, 2006 2:05 pm
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea
Location: Guilford, Connecticut

Post Sun. Feb. 10, 2008 9:57 am

I spoke to Field Controls Tech about this. They recommend the M for coal as it has small holes to bleed air to reduce flyash accumulation in the neck if it is a problem. I use an R/C (also rec.) as most do and it works fine, no flyash problem. The M is probably a good choice when you have a very low draft stoker.

User avatar
Matthaus
Verified Business Rep.
Posts: 1929
Joined: Mon. Oct. 02, 2006 8:59 am
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel, natural gas
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite
Location: Wilkes Barre, PA

Post Sun. Feb. 10, 2008 10:53 am

IMO, buy a type RC, and a manometer, the money spent should equal an M and you will be able to monitor the performance of your stove. :)

Of course there is no substitute for performing the required cleaning of fly ash to keep the draft where it needs to be. :roll:

User avatar
CoalHeat
Site Moderator
Posts: 8332
Joined: Sat. Feb. 10, 2007 9:48 pm
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Baseburners & Antiques: Sears Signal Oak 15 & Andes Kitchen Range
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert
Location: Stillwater, New Jersey

Post Sun. Feb. 10, 2008 7:19 pm

Wood'nCoal wrote:My oil fired furnace has the type M, My opinion is the RC works fine for coal applications.

http://www.fieldcontrols.com/draftcontrol.php#dctop
Correction:
My oil furnace has a Field Controls model "DR" which is not painted. It's not shown on their website. Must be a economy model.
I've never seen it move once.
The RC is doing the watusi on the Alaska, I was just watching it. The wind blows, the manometer shows the draft start to rise, the RC opens, the draft goes back to -.025. The wind blows again.........
The Harman RC stays open, just keeps moving to compensate.

Post Reply

Return to “Coal Bins, Chimneys, CO Detectors & Thermostats”