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JavaBob
09/16/2019 4:03 PM
Has anyone used a Leister hot air blower to roast coffee and if so, which model did you use? What was your experience like?

JavaBob
09/16/2019 3:53 PM
Source for customable borosilicate glass cylinders for use as a roasting chamber?

shoron
09/06/2019 7:25 AM
how to make medium raw colored beans to dark ?

shoron
09/06/2019 7:24 AM
Grin snwcmpr

snwcmpr
09/04/2019 4:47 PM
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CoffeeAir II Roaster Build
seedlings
Wellll, it's a good thing I haven't started any wiring!

My cousin is a master electrician. I'll ask him about it, so he'll know all the local regs. This site says 10 ga is good for 55A:

http://www.powers...e_Size.htm

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Dan
"Ampacity" varies with application, regulations, and distance. You read the 'chassis' column. That is VERY short lengths contained within an electrical enclosure. Not the same application as a long run of romex in a wooden structure. There are formulas for calculating ampacity. The nominal ampacities for typical distances in home wiring (according to a wiring handbook) are:

16ga - 10A
14ga - 15A
12ga - 20A
10ga - 30A
8ga - 55A
6ga - 75A

Ask your cousin to verify these for the group. Most states now subscribe to the same building codes. Thanks, Dan
 
http://www.intactamerica.org
seedlings
Then I want 10-3 with ground and a two pole 30A breaker. Get a hubble 4 conductor twist-lock outlet and do the wiring inside the roaster, which will be 240V to heaters in series, 120V to the PID and 120V to the blower.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Dan
Sounds like a plan, to me. Make sure your SSR's are rated 220VAC.

 
http://www.intactamerica.org
seedlings
Dan wrote:
Sounds like a plan, to me. Make sure your SSR's are rated 220VAC.



I have one 50A 240V SSR.

Here are a bunch of pictures. No new information, just pictures:

i206.photobucket.com/albums/bb54/seedlings/100_6818.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6820.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6816.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6815.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6813.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6812.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6811.jpg

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
allenb
Looks like you're nearing the finish line!

If you get a moment can you post a sketch showing how you're wiring the 240 through the SSR and on to the elements.

I'm not understanding how the SSR sees 240? I assumed you would just be feeding one of the two hot legs through the SSR in which case the SSR would only be seeing 120V?

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
allenb
I sketched up a block diagram of how I would wire it using one SSR and I guess during the off cycle the SSR does see 240V so I answered my own question.

Never mind.ThumbsUp

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
seedlings
Probable schem

CHAD
seedlings attached the following image:
13schemcoffeairii.jpg

Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
dja
have your cousin cabbage onto a short piece of din rail and see if you can get all of your components din rail mountable.
if you don't know what din rail is your cousin will.
David.ThumbsUp
Edited by dja on 08/16/2010 1:38 PM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
Unta
Been in the construction industry for the last 15 years, and I've never read/heard the word cabbage used as a verb..
thank you homeroasters.org. Again, my life is better because of you.
sean
Sean Harrington
educate.
 
http://www.untacoffee.com
dja
I flunked English!
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
Unta
not a knock, just an observation. It made me laugh DJA.
Sean
Sean Harrington
educate.
 
http://www.untacoffee.com
RoasterRob
Been in NDT for 20 years and I know a welder called Cabbage, other welders I know by nickname - Troll, Crayfish, Spanky, Clinky, Vege, Tiger, to name a few.

Rob
VBM Minimax 2gp, 1gp Reneka Techno, 2 gp la Pavoni Pub, la Cimbali M28, SJ Maz, FB 6kg HM roaster and other stuff
 
Dan
I don't think SSRs come in DIN rail mounts. The reason being that they need to be heat sinked. Perhaps if the heat sink was DIN rail, then you could attach the SSR to that.

Typically, you put fuses on both legs of a 240V power line, the reason being that both are 'hot.' On 120V, you only need a fuse on the hot leg (typically black wire).

 
http://www.intactamerica.org
seedlings
Two fuses, thanks, Dan. Since the 50A SSR will only be passing 15A of current, do you think it still needs a heat sink?

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Dan
Maybe, maybe not. :) What I would do is bolt it to your metal enclosure with some heat sink grease. That will give it some protection.
 
http://www.intactamerica.org
allenb
Chad,

Unless the physical size of the back plate of the 50 amp SSR is MUCH larger than a typical 25 amp then I would recommend some sort of a real finned heat sink unless the panel it's mounting to is pretty thick and, as Dan pointed out, includes heat conducting paste.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
dja
oops, sorry about that guy's forgot about the need for a heat sink on the SSR.

must not of ate all my lima beans yesterday

David
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
dja
Chad; here's a pic of the roast chamber that I showed you back in the winter when I was working on a air roaster. Well all the activity with people building air roasters jogged my creative side and this is the roast chamber now all I need is about 1800 watts of heat and a very strong air source.ThumbsUp
dja attached the following image:
roastchamber.jpg

Edited by dja on 08/19/2010 4:50 PM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
seedlings
OK, I have some cash on hand, and picked up the 10-3 w/g, breaker, high-current switches, etc, to get back on track!

However, I'm a little stumped on the specific type of internal fuse holder I should use. What I can find are just AGC-type fuse holders like in the automotive stores. I'm not sure 15A of 220V would be wise through those... one loose terminal and that plastic will melt quick.

Suggestions? (cheap suggestions)

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
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