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Post by Travis on Aug 8, 2017 19:35:55 GMT
The 80 fin DR2 from Sacramento arrived today. It has a rebuild lag dated 1943. I am betting it got its type C control and a spiffy dark blue evaporator at that time. It also unfortunately got robbed of its icing unit badge and got a standard refrigerating unit badge. The bad news is that it leaked it's so2 all over the state of California. The shipper pointed to the high side tube between the float and evaporator as where his nose had burned the most. I don't have any idea if it runs. I am betting that I shouldn't try it as I'd just move the residue through the compressor and stall it. Maybe Gill will allow me to come visit and seal it up. I still need to coil flush the DR4 evap. before powder coating. The cabinet is solid, but the bottom is nearly rusted out. The bottom of the liner has a giant patch and the actual bottom of the cabinet looks like swiss cheese. It has two of its woven wire shelves. It doesn't have a serial number on the dome. That verifies again that the dome serial number tag is removed during the rebuild. Behold all the fins! Attachments:
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Post by birkie on Aug 9, 2017 1:26:09 GMT
Huh, so did the line break during delivery? The shipper seems to have handled that quite well! Maybe this one can be a candidate for R227ea, though I'm not sure you'd let one of your beloved 80-fin units be the first subject of mad-scientist-style experimentation . Just out of curiosity, does it seem like it has a bolted dome? How about a bolted float (since it's so old)?
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Post by Travis on Aug 9, 2017 1:35:50 GMT
It might as well be a guinea pig. I am betting it's a bolted dome. It's impossible to tell if the float is bolted unless opened.
The shipper said the roads are shit in California. I told him that it all looks great in the movies.
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Post by allan on Aug 9, 2017 1:50:47 GMT
The 80 fin DR2 from Sacramento arrived today. It has a rebuild lag dated 1943. I am betting it got its type C control and a spiffy dark blue evaporator at that time. It also unfortunately got robbed of its icing unit badge and got a standard refrigerating unit badge. The bad news is that it leaked it's so2 all over the state of California. The shipper pointed to the high side tube between the float and evaporator as where his nose had burned the most. I don't have any idea if it runs. I am betting that I shouldn't try it as I'd just move the residue through the compressor and stall it. Maybe Gill will allow me to come visit and seal it up. I still need to coil flush the DR4 evap. before powder coating. The cabinet is solid, but the bottom is nearly rusted out. The bottom of the liner has a giant patch and the actual bottom of the cabinet looks like swiss cheese. It has two of its woven wire shelves. It doesn't have a serial number on the dome. That verifies again that the dome serial number tag is removed during the rebuild. Edison Cabinet ! Behold all the fins!
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Post by birkie on Aug 9, 2017 2:06:00 GMT
It might as well be a guinea pig. I am betting it's a bolted dome. It's impossible to tell if the float is bolted unless opened. If Gill's up for it too, I'll provide the 1,1,1,2,3,3,3-Heptafluoropropane for the party!
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Post by Travis on Aug 9, 2017 2:10:51 GMT
I just hope it got rewired in 1943.
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Post by birkie on Aug 9, 2017 2:32:52 GMT
I just hope it got rewired in 1943. Would they have used the copper for that in 1943?
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Post by Travis on Aug 9, 2017 3:06:03 GMT
Yes, they would because they could see into the future that I would need viable wire.
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Post by elec573 on Aug 9, 2017 4:15:08 GMT
Surprised your still using that crank hoist to lift your mts .😳
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Post by Travis on Aug 9, 2017 4:21:42 GMT
I'm surprised at the number it's lifted.
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Post by blackhorse on Aug 9, 2017 4:21:59 GMT
I'm surprised they didn't call the hazmat guys in moon suits to haul it away and charge you $10,000 for the honor! I've seen pics of just that happening; hazmat suited guys with a CK on a hand truck loading it for disposal.
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Post by Travis on Aug 9, 2017 4:39:22 GMT
I can smell it anymore I think it dropped its load in California.
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Post by Travis on Aug 21, 2017 17:48:16 GMT
Ray and I took this unit to see Gill on Saturday. It had leaked somewhere in transit. The last owner had told me that it had worked in the past, but they all have!
In short order, Gill noticed a crack in the coil going from the dome to the float. I don't know how this happened as the tubing wasn't in contact with the fin that would have caused the damage. Gill vacuumed it down and charged a few pounds of 124. Sadly, the unit was free, but has compromised windings. It doesn't get up to speed and was drawing 18 amps.
I need to accept that all DR's are dead unless proven otherwise. I also am accepting that all running DR's will fail at anytime with the least provocation. Those cloth windings can only vibrate so much. Maybe it worked in CA and died on the way. Maybe it worked in my driveway, but died going into my garage. Maybe it died on the way to see Gill. It doesn't matter, it doesn't work now.
Gill gave it every chance to live and we all surrounded it with happy thoughts.
The unusual thing with this unit is that it's a 64 fin dome.
The orange unit from Kevin clearly has more fins. I would assume 80, but I didn't count. The other DR2's that I have are 32 fin units. It appears that even GE was cutting costs in the early years.
This unit is now joining the 80 fin DR2 and the DR35 to be rebuilt in the future. We should know soon if 124 is going to work in these old units. Being able to use a non-toxic refrigerant that operates so closely to the values of so2 is a huge deal. Rebuilding these things is not fast, easy or cheap. It won't ever be since it's not economical to have small motors rewound. There's no economy of scale here.
If you look back at the DR3 rebuild thread, you'll see all the questions about purging so2 and questions about material compatibility with so2. If 124 works as good as it seems to be, those issues are gone. We're very close to being able to ditch the so2 with confidence.
That 1931-32 D2 with the stainless evaporator is running beautifully. Gill thinks the control might have issues. It may have shorter cycles than it should. The frost pattern is full and would make Chris happy. Now to see if it works with the older evaps.
Thank you Birkie(Aaron) for working the math, Coldspaces(Gill) for doing the real work, Ckfan(Ray) for providing the enthusiasm and help to pull these tests together. You can all thank my OCD for having a collection of similar units to test with.
We had three DR2's with type C controls in the truck on Saturday. I would think that was an very uncommon thing past the 1950's.
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Post by blackhorse on Aug 21, 2017 19:08:51 GMT
I need to accept that NO compressor is dead until no stone is left unturned.
Although it's obvious, I assume you've tested the motor at the terminals? 18 amps is about right for both windings running at the same time...
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Post by Travis on Aug 21, 2017 19:17:49 GMT
We had it on an annie. We wanted it to run more than anyone.
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