Installation Guide

64
System Controller Unit
Water heater Terminals
(Water Heaters 1-12)
Remote Controller Cord
Remote Controller Cord
Remote Controller Cord
PCB
Power
PCB
Remote Controller Cord
Remote
Controller
System Controller
Power Supply
Water Heater 1
PCB
Power
PCB
Water Heater 2
PCB
Power
PCB
Water Heater 3
120VAC
Ext
ernal Remote
Te
rminal Block*
Ext
ernal Remote
Te
rminal Block*
Ext
ernal Remote
Te
rminal Block*
* The External Remote Terminal
Block location may differ
depending on the Water Heater.
• The below diagram shows the connection of 3 Water Heaters to the System Controller Unit. When connecting
4 or more Water Heaters, follow the same procedure.
• Connect the Water Heaters to the System Controller Unit follwing the detailed wiring instructions included
with the System Controller Unit.
• Always connect a Remote Controller to the System Controller Unit.
NOTE
Do not connect the included Remote Controllers to the individual Water Heaters.
These Remote Controllers will not be used.
17.2.4 Multi-System Wiring (Using SCU-401-12M, SCU-401-24M)
Installation of the Multi-System