Panasonic CS-A18CKPG Service Manual page 59

There should not be any animal or plant which could be affected by hot air discharged.
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Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles.
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Do not place any obstacles which may cause a short circuit of the discharged air.
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If piping length is over 24.6ft (7.5m), additional refrigerant should be added as shown in the
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table.
If the unit will be installed at a 10m distance, the quantity of additional refrigerant should be 50g...(10 -
Indoor/Outdoor Unit Installation Diagram
Example: For CS-A18CKPG
7.5)m × 20g/m = 50g