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Topic: Some Alpenrost questions (3 msgs / 134 lines)
1) From: Bob Trancho
I just got a new Alpenrost (yes Mike, I am no longer a strict
"Rosto-farian) and after a few roasts I have some questions that I've
not been able to find answers for in the list archives. (Wouldn't it be
nice if there were a search function for the archives?).
1. Is the Alp profile/ambient temp sensor sensitive to repeated roasts?
I did three roasts in a row last night and by the third could scarcely
hit 2nd crack at the 15 setting.  Do I need to give it a long rest
between roasts?
2. I've constructed an exhaust fan setup with a bathroom fan and 3 sided
enclosure - vented out through an acrylic panel set in a window via
dryer vent tubing.  Does this have much effect on ambient temperature?
3. Once the Alp goes into the cooling cycle, does it hurt to open the
door to enhance the amount of air?  It appears to me that it really
doesn't do a very good job at cooling within the 4 minute recommended
time.
4. Is the Alp sensitive to line voltage?  I've been running my Rosto off
a variac to assure the voltage needed.  Will this help the Alp?
Any help from you Alp veterans out there will be greatly appreciated.
Bob Trancho
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2) From: Ken Parker
Bob:
I've roasted with an Alp for a couple of years. (It failed recently, but
Swissmar, great people, are sending me a new one.) Here's my experience
based on your questions.
Q 1. I always let the Alp cool for at least 20 minutes between roasts. I
have never experienced the "scarcely hit 2nd crack at the 15 setting"
problem.
Q 2. I used a similar bathroom fan/vent setup. I don't think it had any
affect on the ambient temperature.
Q 3. The 4 minute cooling cycle is, indeed, too short. I always had to
do additional cooling. (I built a box with screen on two sides and
tossed the still warm beans around in it for a couple of minutes.)
Q 4. Even though I had different combinations of high wattage lights on
during roasts, I never detected any roasting changes due to line voltage
variations. (However, I could see the lights dim slightly during the
roast cycle.)
I hope the above is of use to you.
Ken Parker

3) From: Paul Goelz
I have a new version Alp and this is my speculation based on what little I 
know about its innards.
<Snip>
I do not think it is SUPPOSED to be.  But it does have an ambient 
temperature sensor.  If the sensor it uses to sense ambient temperature is 
somewhat affected by the device temperature (ie., if it is not accurately 
sensing the incoming air temperature) it could introduce an offset, 
thinking that the ambient temperature is higher than it really is.
<Snip>
It is supposed to be able to compensate for ambient temperature.  If this 
is in fact working correctly, it should not matter.  Within a reasonable 
ambient range, that is.
<Snip>
If you open the cover, you prevent the fan from drawing air through the 
drum.  If there is no air being forced through the drum, then the only 
cooling will be by radiation and I would expect it would cool slower.
<Snip>
It is not supposed to be sensitive to line voltage, since it regulates the 
internal temperature.  Line voltage changes should only affect the time it 
takes for the temperature to come up to the regulation point on first power 
up.
Paul
Paul Goelz
Rochester Hills, MI
paul
pgoelzhttp://lists.sweetmarias.com/mailman/listinfo/homeroast">http://www.pgoelz.comhomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast


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