11
Electrical Specifications by Heater Input
Item #
kW
Max
Amps
Required Breaker
Req. Wire Size
AT-910-18TP
18
75 A
3 x 30A double Pole
3 x 8 AWG with ground
AT-910-24TP
24
100 A
3 x 40A double Pole
3 x 8 AWG with ground
AT-910-27TP
27
112.5 A
3 x 40A double Pole
3 x 8 AWG with ground
Power Rates
Item #
240V
220V
208V
AT-910-18TP
18,000 Watts
150,125 Watts
13,520 Watts
AT-910-24TP
24,000 Watts
20,166 Watts
18,026 Watts
AT-910-27TP
27,000 Watts
22,687 Watts
20,280 Watts
Your tankless water heater is now installed and ready to use! Follow the General Operating
Instructions to complete the setup.
Wiring Diagram for AT-910-18TP, AT-910-24TP, AT-910-27TP,
Terminal Block in Unit
Circuit Breakers
Unit Requires 10 AWG ground wire - one for each 240V circuit
L1
L1
L1
L2
8/2 AWG
8/2 AWG
8/2 AWG
L2
L2
240V
240V
240V
L1 L2
L1 L2
L1 L2
Summary of Contents for AT-910-18TP
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