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17-03-2011, 05:14 PM #1
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converting a r22 chiller system to 134a/407
got a project to address a system running on r22,it holds about 14/18 kgs 15hp semi hermitic compressor the room operating at 10degrees c to +3c any ideas/experience of similar.
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17-03-2011, 05:30 PM #2
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Re: converting a r22 chiller system to 134a/407
R407F sounds quite promising in the literature but i have no practical experience of it.
Would need ester oil and all the o rings changing etc but thats pretty much the case with any R22 replacement.
Have one system on R422D, which i don't like but couldn't point to any solid figures as to why, just a gut feeling that it doesn't work as well as the similar R22 unit above it.Mostly found in Oxfordshire, UK :)
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17-03-2011, 06:42 PM #3
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Re: converting a r22 chiller system to 134a/407
Hi,
Before you take any decision, please take a look at this case study.
www.fri3oilsystem.com/retrofitcase.zip
Regards,
Nando.
