There is no receptacle this unit is hard wired into the wire.   Here are some amp draws
 
ELECTRICAL SPECIFICATIONS Domestic Model kW Hz 1 Phase 3 Phase 208V 240V 208V 240V STM-ED 9.3 60 45A - 26A - 12.4 60 - 52A - 30A Export Model kW Hz 1 Phase 3 Phase 220V 240V 220/380V 240/415V STM-EDX 10.4 50 48A - 16A - 12.4 50 - 52A - 18A Unit must be grounded. Main supply voltage fluctuations are not to exceed ± 10% nominal supply voltage. WATER SUPPLY Good quality water feed is the responsibility of the owner. Water quality must be within the following general guidelines. TDS: 40-125 ppm Hardness: 35-100 ppm Chlorine: