FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
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Contents:
Re: Cold room - modifying A/C (jrdunne) ("Mike O'Brien")
Re: Cold room - modifying A/C ("")
RE: Cold room - modifying A/C (IT)" <stjones@eastman.com>
MIME Acceptance (Althelion)
reply to Subject: Cold room - modifying A/C (Thom Cannell)
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Date: Wed, 11 May 2011 03:38:37 +0000 (UTC)
From: "Mike O'Brien" <mobrien315221mi at comcast.net>
Subject: Re: Cold room - modifying A/C (jrdunne)
The CoolBot turns any brand of off-the-shelf, window-type air conditioning
unit (purchased separately) into a turbo-charged cooling machine.
Mike
------------------------------
Date: Wed, 11 May 2011 06:30:00 -0700
From: "" <chrisn at wt.net>
Subject: Re: Cold room - modifying A/C
Joe Dunne wants to modify a window A/C unit to cool his beer and wine
cellar to 50F. I am not an A/C technician, and perhaps one will chime
in on this issue. Until then, I'll say this. While I am sure you can
modify and/or replace the thermostat to achieve this puppose, you will
probably end up killing the window unit. These units generally have a
minimum temperature of 60, as you have discovered. This is becasue at
temperatures below 60, all of the refrigerant may not vaporize in the
expansion coils, resulting is liquid refrigerant returning to the
compressor. This is very bad. With the right insullation, you can
get the window unit to cool to your desired 50F, but you will have to
replace said window unit every couple of years due to compressor failure.
chris north
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Date: Wed, 11 May 2011 10:00:04 -0400
From: "Jones, Steve (IT)" <stjones at eastman.com>
Subject: RE: Cold room - modifying A/C
Joe Dunne asks about 'elegant' solutions for bypassing the thermostat on an
A/C unit used to cool a cold room.
I've run a 4' x 8' x 6' walk-in from a 12,000 BTU A/C unit for over 5 years
now. Here is what I did:
I mounted an outlet box on the inside of the cooler and a Johnson analog
temperature control unit mounted on the outside. The Johnson cord and
capillary tube run into the cooler, with the capillary bulb immersed into a
test tube full of water (to minimize cycling). I bypassed the thermostat in
the AC unit and plug the power cord into the Johnson cord.
I had a problem with the AC coils icing up after it shut off. To prevent
this I added a second power cord to the AC unit to control the fan. This is
plugged into the other socket in the outlet box. The fan is on continuously,
and does add a bit to your electric bill, but not much. At 11-12c per kwh, a
1/2 amp fan will add less than $5 to your monthly bill.
More detail can be found at http://www.franklinbrew.org, SfH Members Pages,
Steve J, Walkin Cooler.
Steve Jones
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Date: Wed, 11 May 2011 15:54:09 +0000 (UTC)
From: Althelion at comcast.net
Subject: MIME Acceptance
This is a test post. It is only a test. If this were a real post, then it
would appear in The Homebrew Digest.
I hope that your coding refinements work. I've lurked here for far too long.
Alan Pearlstein
Commerce Township, Michigan
NMBA (Next Major Brewing Action) - Bottling a roggenbier this weekend
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Date: Wed, 11 May 2011 15:19:03 -0400
From: Thom Cannell <Thom at CannellAndAssociates.com>
Subject: reply to Subject: Cold room - modifying A/C
Joe Dunn asked;
I'm wondering if anyone has an elegant solution for bypassing the thermostat
on an a/c.
I'm looking to cool my beer and wine cellar to around 50 degrees and the
window unit I have doesn't want to cool below 60.
For now, I've pulled the a/c temperature probe out through the front and am
planning to insert it into a can with a small incandescent bulb to make it
think the room is warmer.
I'm hoping for a more refined solution for the long term.
- ------]
I was looking into the same idea, these are sites I looked at and they my
satisfy your needs.
http://littlegreenhouse.com/accessory/controls.shtml
http://www.storeitcold.com/index.php
"If something seems too good to be true it's best to shoot it, just in
case."
Fiona Glenanne / Burn Notice
Thom Cannell
Thom _at_ CannellAndAssociates. c o m
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End of HOMEBREW Digest #5838, 05/11/11
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