If you are using OMB/OMC you need to make sure when using an adapter to connect the oil level control to a scroll or semi-hermetic you need to add the brass adapter also.
Oil Management for ZS and ZF Copeland Scroll™ Compressors (7 ½ to 15 HP)
in Parallel Applications – https://webapps.emerson.com/online-product-information/Publication/LaunchPDF?Index=aeb&PDF=ae1320.pdf
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