Lochinvar 100 Series Instruction Manual page 46

Diagrams
Conversion to Single Phase
When the heater is shipped for connection to a three-phase electrical
service, it may be connected to a single-phase electrical service of
the same voltage by:
1. Disconnect blue wires from terminal L2.
2. Connect all blue wires to terminal L1 (with black wires).
3. Disconnect all red wires from terminal L3.
4. Connect all red wires to terminal L2 (with yellow wires).
5. Connect incoming power to terminals L1 and L2.
46 • Commercial Electric Water Heaters
Figure 14. Nine Elements - Single and Three Phase
Conversion to Three Phase
When heater is shipped for connection to a single-phase electrical
service, it may be connected to a three-phase electrical service of
the same voltage by:
1.
2.
3.
4.
5.
Disconnect blue wires from terminal L1
Disconnect red wires from terminal L2.
Connect all blue wires to terminal L2 (with yellow wires).
Connect red wires to terminal L3.
Connect incoming power to terminals L1, L2 and L3.