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08-01-2013, 12:27 PM #1
improving poster
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- Apr 2012
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Oil return issue on a commercial system!!
Hi guys..
i have been working in industrial ref. industry however recently involved with some commercial projects(HFCs) which i am not so familiar with.Having an oil return issue on a system which has ZR copeland scrolls with R134 a refrigerant!!! any ideas about the root causes!!!
Appreciated in advance,,,
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08-01-2013, 01:46 PM #2
Registered User
I am just settling in to : RE
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- Mar 2006
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- Merate (LC) - Italy
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Re: Oil return issue on a commercial system!!
With so much information I wonder why no one hasn't got a clue.
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09-01-2013, 01:26 AM #3
VIP Poster
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- May 2007
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- Auckland
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Re: Oil return issue on a commercial system!!
Hi Bjk.
the ZR range scrolls are a medium temperature -5.0'C > +5.0'C range compressor,(chillers ) possible problems could be extended high suction pressure conditions, oil separator would then be undersized may require a crankcase pressure regulator. Low suction super heat ( saturated liquid / flood back )
