Lochinvar 100 Series Instruction Manual page 48

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 and yellow wires from terminal L3.
2. Reconnect all blue wires to terminal L1 (with black wires).
3. Reconnect all yellow wires to terminal L2 (with red wires).
4. Connect incoming power to terminals L1 and L2.
48 • Commercial Electric Water Heaters
Figure 16. Nine Element - 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.
Disconnect blue wires from terminal L1.
Disconnect yellow wires from terminal L2.
Reconnect all blue wires and yellow wires to terminal L3.
Connect incoming power to terminals L1, L2, and L3.