Hi All,
I'd really like to hear your ideas on monitoring and remedying refrigerant quality issues in parallel rack setups. I inherited a batch of supermarkets this past winter, and I've noted a few sour charges here & there when working on a case or a rack. Do you use the acid test kits and your sense of smell alone to monitor this problem? Or is there a better way?

How do you go about cleaning a 500 kilo rack, aside from changing the filters, oil, and refrigerant. Especially in systems with POE oil?

(Just a few of the many questions that pass through my grey matter while I'm keeping my own company in a darkened motor room.)
Thx!

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