DSM 1400 secondary inlet and outlets

DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Tue Dec 24, 2013 8:58 pm

Lightening requested pics of the inlet tube at the side of the stove and the outlet holes inside, here you go.

the tube goes all the way from side to side with no turns or obstructions, open at both ends. the surface the holes are in is the top of that same tube.
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KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: Lightning On: Wed Dec 25, 2013 2:05 am

Thanks partner :D
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: DSM 1400 secondary inlet and outlets

PostBy: Lightning On: Wed Dec 25, 2013 2:09 am

So when you were checking it with smoke, You were putting it near the 1 x 1 inlets??
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

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Re: DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Wed Dec 25, 2013 10:13 am

yep, pulled the expanded metal off both sides, set up 2 little stools and put the smokers on them so that the tips were about 2" out from the lower edge of the opening.

depending on what kind of over all draft you have you may have to get them closer i guess, that's not a problem here.

i've got a steady fire after tending 3 hrs. ago. blue flames everywhere, 4-12" high. 525* stove top, bi metal on 4.75, secondaries wide open. dampers are holding it at -.035 / .04 WC. i just got up and opened both dampers and it instantly went to .11 WC.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: Lightning On: Wed Dec 25, 2013 10:24 am

Wow! Sounds like yer warm! I had to crank the furnace this morning since I had it set kinda low overnight. Only 6 degrees this morning :o ..... You got her dialed in good I'm thinkin :) Does the secondary air keep the glass clean too?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Wed Dec 25, 2013 10:48 am

right now the wind chill is 3*, earlier it was -0*, the house is a very pleasant 72* on first floor, warmer upstairs, the wife hates it when the bathroom is cold :P

i have to keep fresh coal up close to the outlet tube for the secondaries to do the air wash thing very well. the hopper tends to keep the firebed "coned". when i was messing around closing off various levels of secondary the glass REALLY got dirty.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Wed Dec 25, 2013 12:08 pm

KingCoal wrote:yep, pulled the expanded metal off both sides, set up 2 little stools and put the smokers on them so that the tips were about 2" out from the lower edge of the opening.

depending on what kind of over all draft you have you may have to get them closer i guess, that's not a problem here.

i've got a steady fire after tending 3 hrs. ago. blue flames everywhere, 4-12" high. 525* stove top, bi metal on 4.75, secondaries wide open. dampers are holding it at -.035 / .04 WC. i just got up and opened both dampers and it instantly went to .11 WC.


EDIT: i should include that the intake flap is stationary at less than 1/8" open to produce these results.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: ridgeracing On: Wed Dec 25, 2013 12:21 pm

KingCoal wrote:yep, pulled the expanded metal off both sides, set up 2 little stools and put the smokers on them so that the tips were about 2" out from the lower edge of the opening.

depending on what kind of over all draft you have you may have to get them closer i guess, that's not a problem here.

i've got a steady fire after tending 3 hrs. ago. blue flames everywhere, 4-12" high. 525* stove top, bi metal on 4.75, secondaries wide open. dampers are holding it at -.035 / .04 WC. i just got up and opened both dampers and it instantly went to .11 WC.

You say secondaries wide open, fixed wide open non adjustable right ?
ridgeracing
 
Hand Fed Coal Stove: DS Machine Stove
Stove/Furnace Make: D.S Machine
Stove/Furnace Model: DS1600WH

Re: DSM 1400 secondary inlet and outlets

PostBy: Lightning On: Wed Dec 25, 2013 12:33 pm

It would be interesting to see if you get the same results as me when cutting back on some secondary air later in the burn. I see a gain of several degrees on the furnace over the load door and a drop of a few degrees on the pipe. I use a digital BBQ thermometer to measure temps in both places.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Wed Dec 25, 2013 12:37 pm

yep, same construction as your stove. through meticulous experimentation i've given up on the notion that these stoves need adjustable secondaries.

by some feat of engineering or magic MY stove alters the amount of air it pulls into the secondary tract according to the amount of over fire draft present. more when draft is low, less when draft is high, no explanation, just happy, steady, even, economical heat.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Wed Dec 25, 2013 12:46 pm

Lightning wrote:It would be interesting to see if you get the same results as me when cutting back on some secondary air later in the burn. I see a gain of several degrees on the furnace over the load door and a drop of a few degrees on the pipe. I use a digital BBQ thermometer to measure temps in both places.


with the hopper in this stove there is no "later on" in the burn. to achieve the type of condition you mean i would have to wait 36 or more hrs. for the hopper to be exhuasted or try it some time when i pull the hopper and fire it as a batch heater.

i can gain temp. at constant settings by closing down secondary anytime the stove is burning. that practice drops the effective area of the stove, increases the internal neg. pressure ( more draft on the mano. remember, more draft less secondary, it works in reverse too, less secondary more draft )and so, draws thru the fire bed more, thus, fire hotter over all and more heat.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: ridgeracing On: Wed Dec 25, 2013 12:50 pm

My thought to! I have noticed with my stove with temps above 300deg. My MPD is closed 90% and drawing .04-.06 If I turn stove down below 300 I need to open MPD 100% to hold a safe draft. Learned that on a warm day (above55 outside) with stove turned down I lost draft
ridgeracing
 
Hand Fed Coal Stove: DS Machine Stove
Stove/Furnace Make: D.S Machine
Stove/Furnace Model: DS1600WH

Re: DSM 1400 secondary inlet and outlets

PostBy: rberq On: Wed Dec 25, 2013 7:18 pm

KingCoal wrote:i can gain temp. at constant settings by closing down secondary anytime the stove is burning.

How do you close down the secondary air? Mine is fixed and non-adjustable, unless I was to stick something in the end ports or plug up some of the holes inside the stove.
rberq
 
Hand Fed Coal Stove: DS Machine 1300
Coal Size/Type: Nut -- Kimmel/Blaschak/Reading
Other Heating: Oil hot water radiators, propane

Re: DSM 1400 secondary inlet and outlets

PostBy: KingCoal On: Wed Dec 25, 2013 7:53 pm

exactly, it's easiest to drop bolts into the outlet holes.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: DSM 1400 secondary inlet and outlets

PostBy: rberq On: Wed Dec 25, 2013 9:10 pm

rberq wrote:How do you close down the secondary air? Mine is fixed and non-adjustable, unless I was to stick something in the end ports or plug up some of the holes inside the stove.
KingCoal wrote:exactly, it's easiest to drop bolts into the outlet holes.

Well, easiest, but not exactly easy to adjust from minute to minute. I too experimented with plugging some of the holes, the same way, and eventually decided to just leave it alone and hope that DS had practiced intelligent design rather than random creation. :P
rberq
 
Hand Fed Coal Stove: DS Machine 1300
Coal Size/Type: Nut -- Kimmel/Blaschak/Reading
Other Heating: Oil hot water radiators, propane

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