Atmor ThermoPro Series Manual page 11

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