Takagi T-H2-DV Installation Manual And Owner's Manual page 31

CASE 3:
If you connect the "MASTER connector" of the "SLAVE 1" unit to the "[1] connector" of the "SLAVE 2"
unit, the "SLAVE 2" unit will operate as an individual unit, and will not be part of the Easy Link system.
MASTER unit
Connecting two "MASTER 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 MASTER to MASTER connection with the
communication cable. Do not splice or modify connectors.
Prohibited
CASE 4:
x If a TM RE30 remote controller (optional) is used, it has to be connected to the "MASTER" unit. If the
TM RE30 is connected to a "SLAVE" unit, it will only control that particular individual "SLAVE" unit
and will not control the Easy Link system as a whole.
connected
TM-RE30
to incorrect unit
x The TM RE30 is not required for the Easy Link system.
x If running the Easy Link system without the TM RE30, please make sure the
temperature settings on ALL the units are set to the same settings. Otherwise, the
units may not operate properly.
x If the TM RE30 is used, the temperature on all the units in the system will
automatically be set to the same temperature that is set on the remote.
Wrong connection between the "SLAVE 1" unit and the "SLAVE 2" unit
SLAVE 1 unit
WARNING
MASTER unit
31
SLAVE 2 unit
SLAVE unit
Page
Installation