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Old 05-12-2011, 04:36 PM   #21
impur
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Temp down to 37 in the carboy yesterday

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Currently fermenting:
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Old 05-12-2011, 04:57 PM   #22
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Originally Posted by impur View Post
Temp down to 37 in the carboy yesterday
Nice.....

another thought. I see that you keg. In this case you don't need a fermentation chamber to go down to lagering temps....you already have one!

All you need is to keep fermentation temps at 50-55ish in your DIY chamber, then rack to keg and lager in your kegerator. This will free up your DIY chamber sooner for the next batch.
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Old 05-16-2011, 05:03 PM   #23
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Cool thanks for the info i need to read up on lagering before i take the plunge but its good to know i'm ready to do some!!

I got the termister removed and soldered to longer wires, so my temp probe is done. I need to open the thermostat back up and switch it to Fahrenheit is all. I picked up a relay, sire, receptacle, box and cover plate so i just need to do a little more wiring and it'll be ready to go











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MAD Brewing - MAD Beer, Brewed Here!

Currently fermenting:
Ale Pail - Mohave Red
6gal carboy -
5gal carboy -
5gal bucket -
3gal carboy -
Bottled:
Rogue Dead Guy Ale | Apfelwein | Autumn Amber Ale

Kegged:
Hop Valley Alphadelic IPA

Next up: IPA of some sort
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Old 05-25-2011, 05:15 PM   #24
impur
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Finished up the temp controller and put the fermentation chamber to work over the weekend. I brewed up my first lager, AHS Anniversary Maibock

Relay



Drilled some holes in the cover plate to mount the thermostat and for wires



I'm just using the cooling part for now



Power supply



Power to the relay



Power to be switched by relay and power for other receptacle socket





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MAD Brewing - MAD Beer, Brewed Here!

Currently fermenting:
Ale Pail - Mohave Red
6gal carboy -
5gal carboy -
5gal bucket -
3gal carboy -
Bottled:
Rogue Dead Guy Ale | Apfelwein | Autumn Amber Ale

Kegged:
Hop Valley Alphadelic IPA

Next up: IPA of some sort
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Old 05-25-2011, 05:19 PM   #25
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Power to be switched by the relay





Everything into the box







Testing set at 50

On



Off

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MAD Brewing - MAD Beer, Brewed Here!

Currently fermenting:
Ale Pail - Mohave Red
6gal carboy -
5gal carboy -
5gal bucket -
3gal carboy -
Bottled:
Rogue Dead Guy Ale | Apfelwein | Autumn Amber Ale

Kegged:
Hop Valley Alphadelic IPA

Next up: IPA of some sort
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Old 05-25-2011, 05:20 PM   #26
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I also wired up a CPU fan that turns on when the fridge turns on to help circulate the air inside the chamber. Seems to be coming on about twice an hour in my garage.

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MAD Brewing - MAD Beer, Brewed Here!

Currently fermenting:
Ale Pail - Mohave Red
6gal carboy -
5gal carboy -
5gal bucket -
3gal carboy -
Bottled:
Rogue Dead Guy Ale | Apfelwein | Autumn Amber Ale

Kegged:
Hop Valley Alphadelic IPA

Next up: IPA of some sort
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Old 05-25-2011, 07:31 PM   #27
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Very cool. Explain to me what the 12v relay does. Is it an insulator between the thermostat and 110v power? So the thermostat runs on its own battery, and just tells the relay to open its switch, which delivers 110v? I ask because there's already a switch in the thermostat, but it's probably not rated to handle 110v.

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Old 05-25-2011, 07:35 PM   #28
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Yes thats exactly how it works. The thermostat cannot handle 110v, so when the temp gets above the set temp, it engages the power from the walwart powersupply which powers the electromagnet in the relay. The electromagnet closes the circuit, allowing 110v to flow to the compressor on the fridge.

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MAD Brewing - MAD Beer, Brewed Here!

Currently fermenting:
Ale Pail - Mohave Red
6gal carboy -
5gal carboy -
5gal bucket -
3gal carboy -
Bottled:
Rogue Dead Guy Ale | Apfelwein | Autumn Amber Ale

Kegged:
Hop Valley Alphadelic IPA

Next up: IPA of some sort
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Old 06-01-2011, 05:07 PM   #29
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I just came onto one of these little fridges (free). Do you think it would be big enough to do two carboys at once? that is keep the temp? I know i would have to build the chamber bigger for the two carboys, just wondering about the overall output of this fridge

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Old 06-01-2011, 07:09 PM   #30
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I just came onto one of these little fridges (free). Do you think it would be big enough to do two carboys at once? that is keep the temp? I know i would have to build the chamber bigger for the two carboys, just wondering about the overall output of this fridge
Here's mine:


Holds 6 carboys. Gets down to about 53°F right now, but that's because I didn't insulate the bottom, and the front insulation usually has a 1/4" gap between it and the rest of the box cuz I have yet to build a plywood box around it to hold it all in tight. I bet I can easily hit 40°F if I encase it in plywood and insulate the floor.

Small mini-fridge, door removed, 2 computer fans inside the fridge, (one in the freezer section blowing air out, one at the threshold between fridge and box to circulate air). Ebay aquarium temperature controller ($30) controls temps AND the 10A relay inside of it is enough to run the fridge. Plywood base has castors for easy moving, but I never drag the whole thing out, so the castors are useless. I just reach in and grab the carboy instead. It's got 1.5" styrofoam all around it, clear duct-taped in place, (again, I could definitely improve insulation by doing a better sealing job).
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