For 36V systems, you will need to use the custom settings. The TriStar assumes that 12V nominal values are programmed into custom memory. When the user changes the DIP switches for 24V or 48V operation, the TriStar automatically doubles(or quadruples) the programmed values. In the case of a 36V system:
Divide your desired regulation setpoints by 4
Program these values into the TriStar using the PC software
Set the TriStar in 48V mode with the DIP switches (DIPS 2,3 = ON)
Set the TriStar battery type to custom (DIPS 4,5,6 = ON)
In 48V mode, the TriStar will multiply your setpoints by 4, attaining the correct regulation voltages you require.  Use the 48V setting because the TriStar will more accurately measure 36V system voltages in the 48V setting.