Installation 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
Communicaon 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
Installaon
Installaon 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