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JohnColo 
Orange Level
Joined: 03 Apr 2020
Location: Niwot, CO
Points: 1263
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 Topic: Any refrigeration guys out there?
Posted: 24 Jun 2020 at 1:42pm |
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I've got a milk cooler box from a dairy truck now setting on blocks on the ground. I had to remove the compressors that were under the box and it took a month last summer to get someone to remove the refrigerant, 404), I plan on mounting a compressor in front of the box and re plumb it. The tubes were sealed when I removed the compressors. I paid over $300 to have the stuff removed. I'm wondering if I could just put in R134 myself and save the money. I do tractors fairly regularly and this doesn't look much different then a tractor or truck system, just bigger. Any advice? Gonna have some peaches to keep cool around July 11th, so got to get the system going.
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steve(ill)
Orange Level Access
Joined: 11 Sep 2009
Location: illinois
Points: 87742
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Posted: 24 Jun 2020 at 1:52pm |
What are the best replacements for R404A?For cold rooms and other small to medium commercial refrigeration applications, R448A and R449A and R452A or R134a are excellent alternatives to R404A, with from 50 to 65% reduction in GWP. R513A, newer alternative, is also very appropriate in medium back pressure (MBP) applications. For small, self-contained units (typically in food service), natural refrigerants could be a sustainable long-term option. In new equipment where the charge is less than 150g or when the location permits, A3-class components like R290 and R600A could be ideal. R513A and R134a are also good affordable alternative for MBP systems with a greater refrigerant charge.
https://www.danfoss.com/en-in/about-danfoss/news/dcs/replacing-r404a-we-are-ready-when-you-are/
Edited by steve(ill) - 24 Jun 2020 at 1:53pm
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Like them all, but love the "B"s.
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desertjoe
Orange Level Access
Joined: 23 Sep 2013
Location: New mexico
Points: 13696
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Posted: 24 Jun 2020 at 3:33pm |
 steve(ill) wrote:
What are the best replacements for R404A?For cold rooms and other small to medium commercial refrigeration applications, R448A and R449A and R452A or R134a are excellent alternatives to R404A, with from 50 to 65% reduction in GWP. R513A, newer alternative, is also very appropriate in medium back pressure (MBP) applications. For small, self-contained units (typically in food service), natural refrigerants could be a sustainable long-term option. In new equipment where the charge is less than 150g or when the location permits, A3-class components like R290 and R600A could be ideal. R513A and R134a are also good affordable alternative for MBP systems with a greater refrigerant charge.
WHEW,,,,after that highly technical reponse,,I ain't chimin in with my little .02 cents shade tree worth,,,,  Way to go Steve,,,,
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JW in MO
Orange Level
Joined: 16 Feb 2010
Location: South KC Area
Points: 2666
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Posted: 24 Jun 2020 at 7:59pm |
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Dang it John, I shoulda checked earlier, I'm like waay south of you, but closer than I will be later, had a small project in Pueblo, got all my tools with me, (vacuum pumps and all), headed back to MO early tomorrow morning.
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Maximum use of available resources!
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shameless dude
Orange Level
Joined: 10 Apr 2017
Location: east NE
Points: 13607
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Posted: 24 Jun 2020 at 9:35pm |
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i thought you was gonna put tappers out the sides and keep our drinks cool!
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JohnColo
Orange Level
Joined: 03 Apr 2020
Location: Niwot, CO
Points: 1263
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Posted: 24 Jun 2020 at 10:05pm |
The outfit I bought it from in Denver, DTI, has a slightly bigger one for $600. You could get it hauled back to eastern NE, or I guess it would need to go to Iowa to the "Big Ones" location.
JW, my bad timing!
Oh, and Thanks Steve for all the good info. Now, I'll have to keep wondering what DJ had to say.
Edited by JohnColo - 24 Jun 2020 at 10:07pm
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steve(ill)
Orange Level Access
Joined: 11 Sep 2009
Location: illinois
Points: 87742
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Posted: 25 Jun 2020 at 1:16pm |
YEP........ that old JOE ALWAYS has a good story !! Wish he would ELABORATE !
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Like them all, but love the "B"s.
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