The zone coordinator has a default the device instance of 1. If the Verasys system is not connected to another BAS system, use the default value of 1. However, if the Verasys system is connected to another vendor’s BAS system, then you may need to adjust the device instance to another value between 2 and 4,914,302. Consult the responsible BAS contractor to find out if changing the device instance is necessary the appropriate value.