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Kafee
Senior Member


Joined: 11 Mar 2003
Posts: 4
Location: NY
Expertise: Beginner

Posted Tue Mar 11, 2003, 7:53pm
Subject: trouble with a commercial brewer Bunn
 

My church finally got rid of the percolators!
And purchased a commercial  Bunn drip machine, with airpots. We use Kirkland brand coffee (not my chioce). We use preground coffee both cans read fine grind. The regular coffee brews without a problem. We use one cup of grinds to 3 liters of coffee. When we use the decaf it overflows the brew basket, water and grinds go everywhere. My helpers are really upset. My pastor ( kind of know it allish) said use less grinds. Well this results in coffee that does not taste good, watered down.
Is decaf processed with something that makes it respond like this to the water. It does not happen with the regular. I even ground my own coffee and put it in the brew basket, it was not ground as fine as the decaf, and it ran fine. What do I do. I think we have ten cans of this decaf.
 I called Kirklad  they had no reason. Theycalled the coffee distributor they could not give an answer. I will speak directly to the distributer in the morning. Thanks from a coffee newbie, Kafee
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koffeekev
Senior Member
koffeekev
Joined: 21 Jul 2002
Posts: 693
Location: Connecticut
Expertise: Professional

Posted Wed Mar 12, 2003, 5:08pm
Subject: Re: trouble with a commercial brewer Bunn
 

Hi Kafee. This problem comes up from time to time so I am quite familiar with it. During the decaf process sometimes the coffee becomes mushy and clay like rather than dry and sand like. This is why the regular is okay and the decaf isn't. The water is having trouble passing through. You don't mention how much of an overflow you are experiencing so I will assume it is more of a hassle than anything.

Try using 2 paper filters. I don't know why this works but it does. Go ahead everybody, argue with me. It works.

I think the biggest clue here is the can reading "fine grind". It's too fine for the water to pass through. Next time get drip, regular or all method grind.

Once you finish up the Kirkland coffee you will probably find the problem has mysteriously disappeared.

Please report back. Kevin
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Kafee
Senior Member


Joined: 11 Mar 2003
Posts: 4
Location: NY
Expertise: Beginner

Posted Wed Mar 12, 2003, 7:38pm
Subject: Re: trouble with a commercial brewer Bunn
 

thanks kevin. Let me get this straight. I need to add a second paper filter to the one I already have in place. this seems to make the water take longer to leave the brew basket, which i would think would make it overflow more. It does not overflow in the first minute or so. it seems like it will work alright so it has us fooled then all of a sudden it begins to throw-up ...
 the Grinds and  hot water go everywhere. It is connected to an automatic water source, so we can't even shut it off with distrubing the brew cycle.
  I will try on Sunday then  let you know how it goes. Will it happen with all decaf or does the brand have something to do with it? Kafee
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koffeekev
Senior Member
koffeekev
Joined: 21 Jul 2002
Posts: 693
Location: Connecticut
Expertise: Professional

Posted Thu Mar 13, 2003, 4:09pm
Subject: Re: trouble with a commercial brewer Bunn
 

Hi Kafee. I've been selling foodservice coffee for about 12 years now and every now and then this problem arises. I really don't know why the two filter system works but I learned it from a big doughnut shop I used to sell to. You would think that the water would slow down but it must draw the liquid away from the coffee and ultimately up the sides of the filters and out.

Instead of using one in the basket put one on top of the first one and dump your coffee in.

I really think the decaf you have is probably ground too fine so I wouldn't expect it to be a problem in the future if you look for drip grind. Kevin
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Kafee
Senior Member


Joined: 11 Mar 2003
Posts: 4
Location: NY
Expertise: Beginner

Posted Sun Mar 16, 2003, 6:56pm
Subject: Re: trouble with a commercial brewer Bunn
 

Kev, i just wanted to update you I spoke to Bunn and the manufacturers of the coffee. Bunn said that the decaf coffee is really dry when it is ground so it grinds finer then the regular.  he offered me to buy a different spray head  that would have less holes in it and thus slow down the process.
 the coffee manufacturer said that the coffee could be ground  at the begining of the cycle so maybe it is finer and clogging the filter.
he is sending me two cans of coffee to experiment with.
 My theory is: that the grinds are different sizes, but so small that it is not that discernable, but the machine knows the difference. the fatter ginds sink to the bottom of the can( as it settles) and the lighter drier smaller grinds are at the top of the can. So you open a can with all those lighter drier smaller  grinds on the top and end up with an overflow problem for a bit then it clears up and  you can't seem to figure it out.
I think I need a cup of coffee. this is all to much for me. Andrea
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SuperbCoffee
Senior Member


Joined: 24 Mar 2003
Posts: 13
Location: Greenville SC USA
Expertise: Advanced

Espresso: none
Grinder: Zassenhaus Hand, Braun Mill,...
Vac Pot: Bodum French Press
Drip: Single Cup ONLY
Roaster: Caffe Rosto, Poppery II
Posted Mon Mar 24, 2003, 7:51pm
Subject: Re: trouble with a commercial brewer Bunn
 

Kafee,
Problems with fine grind in a flat to smooth filter holder can sometimes be eliminated by putting a spacer under the bottom of the filter seperating it from the holder.
Serves essentially the same purpose as adding a second filter; breaks-up the meniscus molecular attraction - capillary action. You take a look at the inside bottom of the filter holder in a lot of auto-drip machines and notices grooves.
Have an animation showing this on one of my webPages
www.f11view.net/coffee/filter-holder.htm
Try a seperator spacer, it may help some.

Kafee Said:

Kev, i just wanted to update you I spoke to Bunn and the manufacturers of the coffee. Bunn said that the decaf coffee is really dry when it is ground so it grinds finer then the regular.  he offered me to buy a different spray head  that would have less holes in it and thus slow down the process.
 the coffee manufacturer said that the coffee could be ground  at the begining of the cycle so maybe it is finer and clogging the filter.
he is sending me two cans of coffee to experiment with.
 My theory is: that the grinds are different sizes, but so small that it is not that discernable, but the machine knows the difference. the fatter ginds sink to the bottom of the can( as it settles) and the lighter drier smaller grinds are at the top of the can. So you open a can with all those lighter drier smaller  grinds on the top and end up with an overflow problem for a bit then it clears up and  you can't seem to figure it out.
I think I need a cup of coffee. this is all to much for me. Andrea

Posted March 16, 2003 link

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