Takagi 110U Indoor (T-KJr2U-IN) Installation Manual And Owner's Manual page 27

NOTICE
(C) Examples of incorrect settings and /or connections
CASE 1: Wrong DIPswitch setting on the "PARENT" unit
"PARENT"
CASE 2: Wrong connections between the "PARENT" unit and the
"CHILD-1" unit
Connectors
Lower bank of
DIPswitches
Communica on cable
Connectors
"1" (or "2")
"CHILD-1"
Connectors
OR
Lower bank of
DIPswitches
Connectors
Lower bank of
DIPswitches
Communica on cable
"PARENT"
Connectors
Lower bank of
DIPswitches
Communica on cable
Lower bank of
DIPswitches
"PARENT" (or "1")
Connectors
Lower bank of
DIPswitches