RC vs M barometric damper

RC vs M barometric damper

PostBy: Bob On: Sun Feb 10, 2008 9:25 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?
Bob
 
Stoker Coal Boiler: AHS 130
Coal Size/Type: Pea/Anthracite

Re: RC vs M barometric damper

PostBy: Wood'nCoal On: Sun Feb 10, 2008 9:30 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
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: RC vs M barometric damper

PostBy: coalkirk On: Sun Feb 10, 2008 9:47 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.
coalkirk
 
Stoker Coal Boiler: Harman VF3000
Coal Size/Type: antrhcite/rice coal


Re: RC vs M barometric damper

PostBy: coaledsweat On: Sun Feb 10, 2008 10:57 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.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: RC vs M barometric damper

PostBy: Matthaus On: Sun Feb 10, 2008 11:53 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:
Matthaus
 
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

Re: RC vs M barometric damper

PostBy: Wood'nCoal On: Sun Feb 10, 2008 8:19 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.
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert