Takagi T-H3J-DV / 240H Installation Manual And Owner's Manual page 30

3. Select one unit to be the "PARENT" unit. The "PARENT" unit should be one of the end units.
4. "PARENT" unit:
Locate the two banks of DIP switches at the bottom left of the computer board of the unit that you
select to be the "PARENT" unit. Change DIP switch No. 1 on the lower bank of DIP switches to the
ON position. See the computer board diagram as shown below. Do not change any DIP switches on
any of the "CHILD" units.
5. Between the "PARENT" and the "CHILD-1" units:
Connect the "PARENT" connector of the "PARENT" unit to the "1" connector of the "CHILD-1" unit
using the supplied linking cable.
6. Between the "CHILD-1" and the "CHILD-2" units:
Connect the "2" connector of the "CHILD-1" unit to the "1" connector of the "CHILD-2" unit.
7. Between the "CHILD-2" and the "CHILD-3" units:
Connect the "2" connector of the "CHILD-2" unit to the "1" connector of the "CHILD-3" unit.
8. Verify that all cables are connected like the diagram below (B).
9. Turn on power to the "PARENT" unit. The remote controller and/or temperature controller will display "1".
Turn on "CHILD-1". When the (remote and/or temperature) controller displays a number, turn on "CHILD-2".
When the (remote and/or temperature) controller displays a number, turn on "CHILD-3".
Make sure the (remote and/or temperature) controllers display the unit #. The numbering system
automatically allocates the unit # to each water heater in the Easy-Link System, in accordance with the
table below.
(A) TH3-DV / 540H Computer board
To change the DIP switch
settings for the Easy-Link
System, locate the bank of
DIP switches at the bottom
left of the computer board.
Do not adjust the upper
bank of DIP switches.
Upper bank of DIP switches
Lower bank of DIP switches
(B) Basic diagram of connections between the Easy-Link System units.
Temperature controller
PARENT unit
Remote controller
Connectors
Lower bank of
DIP switches
Communica on cable
NOTE: The dark squares indicate the direction the DIP switches should be set to.
or
CHILD-1 unit
Connectors
Lower bank of
DIP switches
30
Page
Installation Manual
Type of unit Unit # of Easy-Link
Parent
Child
CHILD-2 unit
Connectors Connectors
Lower bank of
DIP switches
Installation
1
2, 3 or 4
Easy-Link /
Multi-Unit
connectors
are next to
the computer
board.
CHILD-3 unit
Lower bank of
DIP switches