User Guide

25 Page
When the built-in controller installed in the “CHILD-2” unit displays a number, turn on “CHILD-3”.
Make sure the built-in controller installed in each child unit displays each unit #. (Refer to p.40.) The
numbering system automatically allocates the unit No. to each water heater in the Easy-Link System,
in accordance with the table below.
10. Set the water temperature using the built-in temperature controller on the “PARENT” unit. It will set
the temperature for the Easy-Link System. If a remote controller is installed to the “PARENT” heater,
it will override the built-in controller.
(A) 510C model Computer board
WARNING
 To change the DIP switch settings for the Easy-Link System, locate the
lower bank of DIP switches at the bottom left of the computer board.
 Adjust the approproate DIP switch as shown below. DO NOT adjust any
other DIP switches.
 Turn off the power supply to the water heater before changing the DIP
switch settings.
 Failure to observe this warning could result in carbon monoxide poison-
ing or death.
Easy-Link /

connectors
are next to
the computer
board.
Upper bank of DIP switches
Lower bank of DIP switches
(B) Diagram of connections between the Easy-Link System units
Type of unit Unit # of easy-link
Parent 1
Child 2, 3, or 4
NOTE: The black squares indicate the correct DIP switch positions.
PARENT
Communicaon cable
Connectors
Lower bank of
DIP switches
OFF
ON
1
1
1
12
2
2
2
PARENT PARENT PARENT
1
2
3
4
5
6
Connectors Connectors Connectors
1
2
3
4
5
6
OFF
ON
OFF
ON
1
2
3
4
5
6
OFF
ON
1
2
3
4
5
6
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
PARENT unit
CHILD-1 unit
CHILD-3 unit
CHILD-2 unit
Remote controller
Installaon
Installaon Manual
Connecting two “PARENT” connectors together from two separate units may damage
the computer board. The communication cable has a female end and a male end, so
it’s impossible to have a PARENT-to-PARENT connection with the communication cable.
Do not splice or modify connectors.
NOTICE