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R410A
EBEBRATT-Ed
Member Posts: 16,488
I have been looking for a nomnograph for R410A without any luck. I usually use the DuPont Refrigeration manual for pipe sizing and that is fine. They have Nomnographs for most of the other refrigerants but not 410A.
Specifically I am looking to size a 10 ton system with a long run and am concerned about low velocity and oil return with the pipe size the engineer is using.
Looking for a velocity/pressure drop chart/nomnograph fo 410A
Specifically I am looking to size a 10 ton system with a long run and am concerned about low velocity and oil return with the pipe size the engineer is using.
Looking for a velocity/pressure drop chart/nomnograph fo 410A
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Comments
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Page
3-5 has the chart
8-23 pipe sizing
I haven't found the velocity / pressure chart yet
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@pecmsg, I see that but no velocity chart for 410A. I will eep searching
Thanks0 -
@EBEBRATT-Ed
With the high operating pressure of R-410A I haven't seen issues like 12 & 22!
Contact the manufacture, they'll say yes or no.0 -
I used to use charts out of the old Trane Blue Book for 22 but I never have had anything similar for 410A. A quick search brought this up from York but it may not be as specific for what you need. Edit : that last link has some good stuff.
https://yorkcentraltechtalk.files.wordpress.com/2013/07/liquid-line-chart.png
https://yorkcentraltechtalk.files.wordpress.com/2013/06/suction-line-sizing-chart.png
https://hvacrknowlagecenter.homestead.com/PipeSizing.pdfhvacfreak
Mechanical Enthusiast
Burnham MST 396 , 60 oz gauge , Tigerloop , Firomatic Check Valve , Mcdonnell Miller 67 lwco , Danfoss RA2k TRV'sEasyio FG20 Controller
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@pecmsg , @ratio , @icy78 @hvacfreak2
Thanks to everyone that responded.
The info that ratio & hvacfreak2 posted both have a 410A nomograph which is just what I needed. Thank you
And an early Merry Christmas
The engineer wants to run a 10 ton 410A system (long piping run) and specified 1 5/8" suction. Sounds big to me (and it is) but now I will be able to figure it out. I was concerned about oil return. The good news is the condensers are below the evaporators but you still have to be able to move the oil even if lift isn't an issue1 -
I’ve noticed one thing all the install manuals call for a larger suction line. Were 7/8 was good for 5 ton on 22 they almost all call for 1-1/8” suction now.EBEBRATT-Ed said:@pecmsg , @ratio , @icy78 @hvacfreak2
Thanks to everyone that responded.
The info that ratio & hvacfreak2 posted both have a 410A nomograph which is just what I needed. Thank you
And an early Merry Christmas
The engineer wants to run a 10 ton 410A system (long piping run) and specified 1 5/8" suction. Sounds big to me (and it is) but now I will be able to figure it out. I was concerned about oil return. The good news is the condensers are below the evaporators but you still have to be able to move the oil even if lift isn't an issueDL Mechanical LLC Heating, Cooling and Plumbing 732-266-5386
NJ Master HVACR Lic# 4630
Specializing in Steam Heating, Serving the residents of New Jersey
https://heatinghelp.com/find-a-contractor/detail/dl-mechanical-llc
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I cannot force people to spend money, I can only suggest how to spend it wisely.......0 -
@EBEBRATT-Ed
Did you stay with the 1⅝ then?0
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