Mojonnier Receiver Piping

Does anyone know where I can find a piping diagram for a Mojonnier Carbo Cooler. We have worked on some Carbonation systems in the past, but nothing this small. Thanks in advance. If there arent any drawings. A little bit of help explaining what theyre doing at the receiver would be welcomed.

Thanks!!

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There are a number of types & how they are piped.

Would need to know what carbo cooler vessel looks like & how it is piped, as some are critically charged.

Parker or Refrig specialties valve, what type is it, any ideas?