Trane Exergy S 180 Installation And Operation Manual page 40

The Slaves view.
In the Number of slaves field, enter the number of heat pumps being controlled (in
addition to the master heat pump).
In the address fields, enter the last two numbers of each slave heat pump's IP address.
Default addresses: Master: 11, Slave 1: 21, Slave 2: 31, Slave 3: 41, etc.
The Max. power field indicates the maximum allowable power for the heat pumps
being controlled.
The First to start menu has the following options:
● Alternates = the start order is rotated; the first heat pump to start is changed
between each start.
● 0 = master heat pump
● 1 = Slave 1; 2 = Slave 2; 3 = Slave 3, etc.
Each of the slave heat pumps must be set under remote control. Open the slave heat
pump's Control settings view (see section Control settings). Press the remote
setpoint button, see the figure below.
Master–Slave operation
In a Master–Slave configuration, a number of slave heat pumps are controlled by a
master heat pump's controller. The heat pumps are started and stopped one at a time,
each after a start or stop delay. Once the start delay has elapsed, the next heat pump
in the starting order starts. The rest of the heat pumps will run at a lower capacity
to prevent a spike in the overall capacity. Correspondingly, once the stop delay has
elapsed, one of the heat pumps will be switched off, and the rest will run at a higher
capacity to prevent a sharp fall in the overall capacity.
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