Aquavia Swimspa Fitness Spa Manuel D'installation page 18

ELECTRICAL CONNECTION
Single line 1x16A or 1x32A
Double line 2x16A
Remove wire from J26 to J32
Three-phase line
Remove wire from J26 to J32 and from J28 to J58.
If an expansion card is installed, the black wire that comes from the connector J6 of the
expander board must be connected to J28 of the main board.
Switch A2 + A10 : ON ( HIGH AMP )
18 Spa for private use - Installation Manual