HomeRoast Digest


Topic: behmor afterburner was: Behmor Fire (6 msgs / 245 lines)
1) From: Doug Grove
Hi Len,
I repaired my afterburner at least 6 times before finally giving up
and leaving it broken.
Not having the afterburner running gives more power to the elements and sho=
rtens
the roast time a bit.
I suspect that is was my use of a Variac that caused the afterburner
issues.  As near
as I could figure out, it would blow out when the cool cycle came on.
Perhaps too much
power being directed to it at that time??  Not an engineer so have no
clue if that's reasonable
or not.  I only used the Variac since I have poor line voltage in my
old house and only set it
to around 125 V, which is high-normal ASFAIK.
Doug
On Thu, Apr 12, 2012 at 11:11 AM,   wrote:
<Snip>
r.
<Snip>
the
<Snip>
ure and have
<Snip>
.  In
<Snip>
ious
<Snip>
ts
<Snip>
 heat
<Snip>
st
<Snip>
ly
<Snip>
ever
<Snip>
mariascoffee.com
<Snip>
a>
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetma=riascoffee.com
Sweet Maria's Forum
Our new Coffee Library

2) From: Michael Baladi
Were you setting it to 125 volts while it was running (ie: elements on?).
If so I wouldn't call that high-normal. 125 at rest is maybe a high normal, that would get you around 122 most likely while running. 125 with a 1500 watt load is definitely high and yes I believe that would burn out the afterburner prematurely. Once the mains kicked off on the cool cycle the afterburner would be running about 127 volts.
If you are going to run a variac to the entire unit I'd recommend setting it to a nominal line voltage before you start and leaving it alone. If you split off the heater and connect them directly to the variac then you gain a lot more freedom to control the heat output without jeapordizing the rest of the electronics, however then you fundamentally changing the way the machine runs and disabling all it's safeties.
Mike
From: homeroast-bounces [homeroast-bounces] On Behalf Of Doug Grove [dgrove.wa]
Sent: Thursday, April 12, 2012 2:25 PM
To: A list to discuss home coffee roasting. There are rules for this list,      available athttp://www.sweetmarias.com/maillistinfo.htmlSubject: [Homeroast] behmor afterburner was: Behmor Fire
Hi Len,
I repaired my afterburner at least 6 times before finally giving up
and leaving it broken.
Not having the afterburner running gives more power to the elements and shortens
the roast time a bit.
I suspect that is was my use of a Variac that caused the afterburner
issues.  As near
as I could figure out, it would blow out when the cool cycle came on.
Perhaps too much
power being directed to it at that time??  Not an engineer so have no
clue if that's reasonable
or not.  I only used the Variac since I have poor line voltage in my
old house and only set it
to around 125 V, which is high-normal ASFAIK.
Doug
On Thu, Apr 12, 2012 at 11:11 AM,   wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmariascoffee.comSweet Maria's Forum
Our new Coffee Library
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmariascoffee.comSweet Maria's Forum
Our new Coffee Library

3) From: Greg Hollrigel
I'm glad to hear this report.  I figured mine broke within about 2 months
from when I bought the new unit.  There was no more smoke suppression.
Being the non-engineer type, I just left it and moved the roaster to the
garage, where the smoke was more "acceptable" to those who live with me.
So now I just live with the smoke.  Of course, I'm assuming the afterburner
was the smoke suppressor, if it's not, nevermind.  :-)
On a side note, I am pleased to report that last week I roasted some of the
current Sumatra Tom is offering (the beans look kind of worked), and 2 days
after the roast, it smelled and tasted of blueberries (super sweet and
fruity).  I've never experienced this before with Indonesian coffees, just
African.  It was a great surprise!
Greg
On Thu, Apr 12, 2012 at 11:25 AM, Doug Grove  wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmariascoffee.comSweet Maria's Forum
Our new Coffee Library

4) From: Doug Grove
It was set to 125 before running - so around 121ish while running.  I
don't try to do profiling with the
variac, just set it then leave it alone.
On Thu, Apr 12, 2012 at 11:45 AM, Michael Baladi  wrote:
<Snip>
l, that would get you around 122 most likely while running. 125 with a 1500=
 watt load is definitely high and yes I believe that would burn out the aft=
erburner prematurely. Once the mains kicked off on the cool cycle the after=
burner would be running about 127 volts.
<Snip>
 it to a nominal line voltage before you start and leaving it alone. If you=
 split off the heater and connect them directly to the variac then you gain=
 a lot more freedom to control the heat output without jeapordizing the res=
t of the electronics, however then you fundamentally changing the way the m=
achine runs and disabling all it's safeties.
<Snip>
sts.sweetmariascoffee.com] On Behalf Of Doug Grove [dgrove.wa]
<Snip>
,      available athttp://www.sweetmarias.com/maillistinfo.html<Snip>
hortens
<Snip>
at
<Snip>
er.
<Snip>
 the
<Snip>
be
<Snip>
ture and have
<Snip>
r.  In
<Snip>
vious
<Snip>
nts
<Snip>
e heat
<Snip>
rst
<Snip>
ld
<Snip>
tly
<Snip>
never
<Snip>
tmariascoffee.com
<Snip>
/a>
<Snip>
mariascoffee.com
<Snip>
a>
<Snip>
mariascoffee.com
<Snip>
a>
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetma=riascoffee.com
Sweet Maria's Forum
Our new Coffee Library

5) From: John Nanci
Off hand, it does not sound like to me you are running too high for 
the afterburner.  Most likely you are just being a touch hard when 
you reset the coil.  The slightest crimp or nick will cause them to 
break again early.  Also, I have some spares and would be happy to 
get one to you - just drop me a line.
BTW, just for the record, having the after burner burned out, does 
not give more power to the elements.  The circuity just doesn't work 
that way.  And in all cases I have seen, having a burned out 
afterburner actually will slow the roast because less heat is being 
introduced into the system.  I suspect you are seeing something 
different because you have it on a variac.
John
Alchemist at large
At 12:08 PM 4/12/2012, you wrote:
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetmariascoffee.comSweet Maria's Forum
Our new Coffee Library

6) From: Doug Grove
Well, I've always run the Variac with the behmor, before and after I
gave up on the
afterburner, so that wouldn't explain the difference w/ vs. w/o.
Anyway, I got sick
of repeatedly fixing the afterburner so just left it broken.  I did
replace the entire
unit early on, but the new one didn't last long either, so it can't
just be damage
I'm introducing when fixing it.
Anyhoo, whatever the reason for the breakage, I roast in the basement and my
family has gotten used to the smoke from my weekend roasting.
Doug
On Thu, Apr 12, 2012 at 12:15 PM, John Nanci  wr=
ote:
<Snip>
t the
<Snip>
rop
<Snip>
ve
<Snip>
 And
<Snip>
low
<Snip>
pect
<Snip>
ith a
<Snip>
t the
<Snip>
he
<Snip>
lone.
<Snip>
en you
<Snip>
g the
<Snip>
ay the
<Snip>
html
<Snip>
ing
<Snip>
ht
<Snip>
 the
<Snip>
uently
<Snip>
weetmariascoffee.com
<Snip>

<Snip>
eetmariascoffee.com
<Snip>
/a>
<Snip>
eetmariascoffee.com
<Snip>
/a>
<Snip>
tmariascoffee.com
<Snip>
/a>
<Snip>
mariascoffee.com
<Snip>
a>
<Snip>
Homeroast mailing list
Homeroasthttp://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_lists.sweetma=riascoffee.com
Sweet Maria's Forum
Our new Coffee Library


HomeRoast Digest