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You need to pull the refrig and pressurize with nitrogen to find leaks. Your Purge can't keep up with the air leaking in. Did I understand you correctly, did you put a whole new purge unit on. If so, maybe the restrictor is plugged in pump-out line,or there is so much air that pumpout...

How did you verify purge is working? What type of purge is it. Recip, purifier, etc.

I don't really care for them to much. Once you start them up (commission), they don't give you any problems. I don't really care for that, as I make a living servicing HVAC equip. Now ask me about York Chillers, I love them.

To calc actual flow thru a bundle we have been using this formula. ((Design GPM)X (SQRT(actual delta P/Design deltaP))) Below is the EXCEL spreadsheet formula out of a log I use to log chillers. E204 is design GPM off of submittals C205 is entry for actual delta P read off gages C204 is...

Here are some sugestions that will allow you to generate some good will and respect as an Engineer among the Customers you have and more so among the Service Companies that have to work on your profect for the next 20 years. Trust me, word gets around who designs the good plants and which ones...

After working on numerous aircooled and water cooled chillers with sound blankets on compressors I can tell you they are a pain in the *** to remove and put back on. They never go back on as well as they originally did or should. My advice from a service standpoint is to go with the wall...