GEA Grasso 5 Installation And Maintenance Instructions Manual page 4

Installer oriented information
The compressor (package) is filled with nitrogen to prevent penetration of
moisture. Therefore, keep the compressor closed until the compressor (package)
is being installed.
Never store the compressor filled with compressed air. Compressed air contains
moisture that will corrode the inside and working components of the compressor.
To store the compressor, fill it with dry nitrogen after fully evacuating it.
4
Warning!
The compressor, oil filters, oil lines, etcetera, are not filled with oil.
Pre-lubrication is obligatory. Refer Section 4.7, Page 61
Hint!
After the successful initial run of the compressor (package) the
warranty chart must be filled in and returned to Grasso. A warranty
chart is attached to each compressor.
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07.04.2021