The Column section allows you to select the column whose parameters to set up. The descriptions of the configured columns, together with Bypass and Waste positions are displayed in an option list. When you select an option from the list, its position in the column thermostat cluster is highlighted in the adjacent device image; for the bypass and waste positions, no column is shown.
not used indicates that the corresponding valve position has not been configured.
no column installed indicates that the valve position has been configured, but no column has been assigned.
When you select a column from the list, the other sections of the dialog box show the parameters specific to the selected column.