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Old 08-22-2007, 04:04 PM   #1
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Default Making a SOF chiller - thermostat?

Since my new heat pump/ac unit won't be in until at least Tues., I've decide to make a fermentation chiller so I can brew this weekend (can't miss a weekend of brewin'). It seems pretty straight forward, but does anyone have an suggestions for a thermostat to use?


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Old 08-22-2007, 04:10 PM   #2
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Buy a simple manual thermostat. Do not go digital.


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Old 08-22-2007, 04:14 PM   #3
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Quote:
Originally Posted by EdWort
Buy a simple manual thermostat. Do not go digital.
why? care to elaborate?
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Old 08-22-2007, 04:28 PM   #4
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They require 24v AC to operate. The simple $15 thermostats run on 12v DC just like the fan you will use.
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Old 08-22-2007, 04:53 PM   #5
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Quote:
Originally Posted by EdWort
They require 24v AC to operate.
That may be true for some, but I bought a digital thermostat at home depot that is designed for the standard 24VAC system but also allows you to power it with a AA battery. So far the battery has lasted several months, so battery life doesn't appear to be a big issue either. I then just have a 12v wallwart that it switches to run the fan.
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Old 08-22-2007, 04:54 PM   #6
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Do you use a heat/cool thermostat or a heat only?
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Old 08-22-2007, 08:05 PM   #7
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It needs to be heat/cool or cool only. (Unless you use a relay to reverse the output of the thermostat). Heat only would turn OFF your fan when it drops below the setpoint.

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Old 08-22-2007, 08:16 PM   #8
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The one I'm using is heat/cool. Cost me 5 bucks at home depot - I got lucky and they were on clearance. So, I have no concept for how expensive these things are normally
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Old 08-22-2007, 11:15 PM   #9
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use this

linky

works great, runs on AA, digital. Cheap ($20)
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Old 08-22-2007, 11:24 PM   #10
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Here is the one I use...runs off of a AA battery and has been fine for 9 months so far.


RiteTemp Off White, Manual Thermostat, Heat/Cool With Fan Control, Low Battery Indicator, Fully Digital

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Model GPMG8099

$16.97/Each

Hope this helps,

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