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Post by coldspaces on Dec 31, 2015 4:40:45 GMT
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Post by coldspaces on Dec 31, 2015 6:22:16 GMT
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Post by Travis on Dec 31, 2015 22:36:22 GMT
No wonder there are so few DR's left. They're being mean to them. That last image is a DR4 of some sort.
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Post by coldspaces on Jan 1, 2016 0:43:05 GMT
No wonder there are so few DR's left. They're being mean to them. That last image is a DR4 of some sort. Mean or not they sure did use some for testing. Did you see it says the 16 on the ceiling were wired to run non stop, they just added heat as needed. |
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Post by ChrisJ on Jan 1, 2016 14:57:25 GMT
Acid brine........ Glad my CA machines have quality non-magnetic stainless evaporators without any brine to worry about.  Nice find Gill. You've been finding a lot of good reads lately. |
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Post by timeswelding on Jan 1, 2016 19:53:05 GMT
Acid brine........ Glad my CA machines have quality non-magnetic stainless evaporators without any brine to worry about. Nice find Gill. You've been finding a lot of good reads lately. The stainless evaps are definitely nice, but the brine sure does a fine job of eliminating short cycling. My D35 will stay off for over two hours, thanks to its icing solution. |
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Post by Travis on Jan 1, 2016 20:51:49 GMT
It's probably good that they experimented with DR's than with the later CA's. They might not have had enough room to install enough CA's up there to account for their quirks.
I still wonder why they never made larger CA units. They either had an overstock of DR's in the larger sizes or they knew the CA couldn't handle a larger cabinet.
I do like the stainless evaporators. I have a DR1 with a stainless evaporator, it's sweet!
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Post by ChrisJ on Jan 1, 2016 21:19:38 GMT
A CA not being able to handle a larger cabinet doesn't make sense.
Methyl formate removes approx twice as much heat as SO2 for the same quantity of refrigerant. My opinion is the 1933 model was released and once they saw the NCG problem they then hesitated, introduced the 1934 model and wanted to see how it went. When NCG problems continued they moved back to SO2. Float valve problems likely didn't show up until much later.
Did they make all 3 or 4 sizes of DRs at once, or did they start with smaller ones and introduce larger ones later?
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Post by Travis on Jan 1, 2016 22:24:21 GMT
As far as I can tell, they made all the DR models at once. I have examples of the DRA2, DR2 and DR3 and DRF4 with a type C control. The literature for the larger sizes also has that control. The answers would be in the development of the CK compressor. I bet that was designed and they gave up on the CA.
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Post by coldspaces on Jan 1, 2016 23:18:10 GMT
Acid brine........ Glad my CA machines have quality non-magnetic stainless evaporators without any brine to worry about. Nice find Gill. You've been finding a lot of good reads lately. I have found so much more. Bookmarked so many things I still need to add links for. We should have read these a long time ago. Much of it was written by the men who figured all this stuff out to start with. |
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Post by coldspaces on Jan 2, 2016 5:29:26 GMT
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Post by coldspaces on Jan 4, 2016 3:51:09 GMT
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Post by coldspaces on Jan 8, 2016 3:49:30 GMT
I forgot to mention something about the DR being tested in this last link. I sure looks like it has a stainless steel evap in it.
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Post by ChrisJ on Jan 8, 2016 16:13:09 GMT
I forgot to mention something about the DR being tested in this last link. I sure looks like it has a stainless steel evap in it. Probably testing different evaporators to see differences in performance? |
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