Electrical Specifications by Heater Input
Item #
18kW
24kW
29kW
28.8
Power Rates
Item #
18kW
24kW
29kW
Your tankless water heater is now installed and ready to use! Follow the General Operating Instructions to complete the setup.
Wiring Diagram for 18kW
Wiring Diagram for 24kW, 29kW
10
kW
Max Amps
Required Breaker
18
75
2 x 40A Double Pole
24
100
3 x 40A Double Pole
120
3 x 40A Double Pole
240V
18,000 Watts
15,125 Watts
24,000 Watts
20,166 Watts
28,800 Watts
24,200 Watts
40 Amp
40 Amp
Double Pole
Double Pole
L1
L2
L1
L2
Unit Requires 10 AWG ground wire - one for each 240V circuit
Req. Wire Size
2 x 8/2 AWG with Ground
3 x 8/2 AWG with Ground
3 x 8/2 AWG with Ground
220V
208V
13,520 Watts
18,026 Watts
21,632 Watts
40 Amp
40 Amp
Double Pole
Double Pole
L1
L2
L1
L2
Unit Requires 10 AWG ground wire - one for each 240V circuit
40 Amp
Double Pole
L1 L2
L1
L2
8/2 AWG
8/2 AWG
8/2 AWG
Terminal Block in Unit
L1 L2
L1 L2
8/2 AWG
8/2 AWG
L1 L2
L1 L2