Craftsman CMXTEPA0018 Instruction Manual page 10

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