Johnson Temp Controller - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Johnson Temp Controller

Reply
 
Thread Tools
Old 05-31-2011, 04:51 PM   #1
flabyboy
 
flabyboy's Avatar
Recipes 
 
Dec 2010
Dover, MN
Posts: 945
Liked 13 Times on 13 Posts



Quick question. I just received my Johnson temp controller for my kegerator project and am wondering if any of you had to open up the box and change around any of the jumpers inside. The menu buttons seem pretty straight forward and it is factory preset for cooling purposes.

 
Reply With Quote
Old 05-31-2011, 04:54 PM   #2
Homercidal
Licensed Sensual Massage Therapist.
HBT_MODERATOR.png
 
Homercidal's Avatar
Recipes 
 
Feb 2008
Reed City, MI
Posts: 31,361
Liked 5010 Times on 3381 Posts


I changed mine around, but I was using to to heat a freezer in the winter. I think that if you are using in cooling mode you should be fine. The other jumper is for cut-in/cut-off, and I think most people use the default.

 
Reply With Quote
Old 05-31-2011, 06:27 PM   #3
h22lude
HBT_SUPPORTER.png
 
h22lude's Avatar
Recipes 
 
Dec 2010
lincoln, ri
Posts: 2,694
Liked 178 Times on 150 Posts


cooling no...heating yes
__________________
Up Next: Blonde Ale, German Pils
Primary: Pumpkin Spice Latte Stout
Kegged: Galaxy Dry Hopped Fort Point clone, Blonde Ale
Bottled: S'mores Stout, Blonde Ale

 
Reply With Quote
Old 05-31-2011, 08:08 PM   #4
flabyboy
 
flabyboy's Avatar
Recipes 
 
Dec 2010
Dover, MN
Posts: 945
Liked 13 Times on 13 Posts


I'm using mine to keep a cheat freezer in my house between 40-45 degrees. Should be good not touching it then.

 
Reply With Quote
Old 05-31-2011, 08:23 PM   #5
JJL
 
JJL's Avatar
Recipes 
 
Feb 2010
, WI
Posts: 1,287
Liked 30 Times on 23 Posts


You're going to want it set to cooling and to cut out. You'll want the set point at 40 and a dif of 4 or 5 to keep it between 40 & 45.

 
Reply With Quote
Old 05-31-2011, 10:03 PM   #6
flabyboy
 
flabyboy's Avatar
Recipes 
 
Dec 2010
Dover, MN
Posts: 945
Liked 13 Times on 13 Posts


Cool. Thanks for the info. What do you mean "set to cut out"??

 
Reply With Quote
Old 06-01-2011, 01:52 AM   #7
BigBlueBrad
 
BigBlueBrad's Avatar
Recipes 
 
Apr 2009
Ooltewah, Tennessee
Posts: 67


Quote:
Originally Posted by h22lude View Post
cooling no...heating yes
He's right.
__________________
J BreW Beer

 
Reply With Quote
Old 06-09-2011, 12:56 PM   #8
flabyboy
 
flabyboy's Avatar
Recipes 
 
Dec 2010
Dover, MN
Posts: 945
Liked 13 Times on 13 Posts


So have my setpoint at 40 and my DIF at 5 and the temp dropped to 35. Do I need to set the SP to 45 if I want the temp between 40-45

 
Reply With Quote
Old 06-09-2011, 01:12 PM   #9
flabyboy
 
flabyboy's Avatar
Recipes 
 
Dec 2010
Dover, MN
Posts: 945
Liked 13 Times on 13 Posts


Now I have the SP at 45 and DIF at 5. The freeze kicked in at 45 and I went to look at the temp 10 mins later and it's 35. WTF

 
Reply With Quote
Old 06-09-2011, 02:19 PM   #10
Homercidal
Licensed Sensual Massage Therapist.
HBT_MODERATOR.png
 
Homercidal's Avatar
Recipes 
 
Feb 2008
Reed City, MI
Posts: 31,361
Liked 5010 Times on 3381 Posts


Quote:
Originally Posted by JJL View Post
You're going to want it set to cooling and to cut out. You'll want the set point at 40 and a dif of 4 or 5 to keep it between 40 & 45.
In this setup, the freezer will turn ON at 45, and turn off at 40. The freezer will turn on at the SP + Differential, which is 45. It will turn OFF at the SP (Cut-out).

The Cut-in and Cut-out is what they controller will do when the SP is reached.

Keep in mind that even though the freezer has turned out, there is a chance that the temp could drop a degree or two as the cold soaks into the freezer.

And a small fluctuation in air temp is not a concern. It's the temp inside the fermenter that matters, and it will be more stable, as it has such thermal mass to not lose or gain temp as quickly.

I really suggest you re-read the manual a few times. There is a small section that should give a visual example of how the cut-in and control mode work together. It's not hard to understand if you can "see" it.

 
Reply With Quote
Reply
Thread Tools



Forum Jump