Takagi T‐KJr2‐IN Installation Manual And Owner's Manual page 25

4. 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.
5. 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.
6. 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.
7. Make sure the 7‐seg. LED of all the units' computer boards 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.
Parent unit
Child units
(A) T‐D2‐IN/OS Computer board
Easy‐Link system
"Online" LED
Left bank of
dipswitches
7‐Seg. LED
Right bank of
dipswitches
(B) Basic diagram of connections between the Easy‐Link System units.
PARENT unit
C o n n e c t o r s
Right bank of Dipswitches
ON
OFF
Communication cable
The dark squares indicate the direction the dipswitches should be set to.
CAUTION
Unit # : 1
Unit # : 2, 3 and 4
CHILD‐1 unit
C o n n e c t o r s
Right bank of Dipswitches
ON
OFF
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Easy‐Link connectors
are next to the
computer board.
To change the dipswitch
settings for the Easy‐Link
system, locate the bank
of dipswitches to the
right of the 7‐seg LED.
Do not adjust the left
bank of dipswitches.
CHILD‐2 unit
C o n n e c t o r s
Right bank of Dipswitches
ON
OFF
Page
Installation
CHILD‐3 unit
C o n n e c t o r s
Right bank of Dipswitches
ON
OFF