6
Removable walls
Removable walls is a function that enables one controller to act as a master that controls up to four other
slave controllers. This is useful in large spaces that are equipped with several heating, cooling, or VAV
devices, and where a uniform climate control throughout the whole space is needed. Typical applications
where the removable walls function is useful are large conference rooms or open-plan offices that are
equipped with removable walls.
Figure 6-1 Removable walls configuration settings in Application tool.
When the removable walls function is enabled, a shared zone that includes the master and the configured
slaves is established. The master collects measurements from all the slaves, and calculates an average that it
uses as baseline to determine the control demand data that applies for the whole shared zone. Only the
configuration settings in the master are used to determine the control demand data that is used for
controlling the shared zone.
After the master has determined the control demand data, the master sends the same data to all the slaves.
Each controller in the shared zone then uses the control demand data to generate output signals
corresponding to its connected devices. This means that any unique set of heating, cooling, or VAV devices
that are configured on a slave in the shared zone perform according to the control demand data that is
determined by the master.
If the master loses communication with a slave, the slave reverts to standalone operation and starts to control
its connected heating, cooling, or VAV devices according to its own configuration settings.
Each room unit that is connected to the master or any slave in the shared zone is active. This means that the
latest setting change performed in any of the room units is accepted by the master and is visible in all the
other room units.
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