Fronius Primo 208-240 3.8-1 Instructions D'installation page 24

208 V Delta - Corner Grounded *
Setup : 208, CAL4, HI4
No neutral conductor
220 V Delta - Corner Grounded * Setup : 220
No neutral conductor
240 V Delta - Corner Grounded *
Setup : 240, CAL5, HI5
No neutral conductor
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208 V Delta : 120 V WYE Setup : 208N, CAL2, HI2
Neutral conductor available
220 V Delta : 127 V WYE Setup : 220N
Neutral conductor available