Panasonic CS-E9GFEW-2 - Manual (Page 14)

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5.2. CS-E18GFEW-2 CU-E18GFE-2
If piping length is over rated length, additional refrigerant should be added as shown in the table.
Model
Piping size Rated Length
(m)
Max.
Elevation (m)
Min. Piping
Length (m)
Max. Piping
Length (m)
Additional
Refrigerant (g/m) Gas Liquid
E18GFE-1 1/2” 1/4” 7.5 15 3 20 20