Installation and Maintenance Manual

16 VAV-SVX07A-EN
VAV Start Up/Check Out Procedure
Rotary Switches
There are three rotary switches on the font of the Tracer™ UC400 controller device that are used
to define a three-digit address when the Tracer TU service tool is installed on a BACnet
communications network. The three-digit address setting is used as both the BACnet MAC address
and the BACnet device ID.
Note: Valid MAC addresses are 001 to 120 for BACnet.
Important: Each Tracer UC400 controller device on the BACnet link must have a unique rotary
switch setting, otherwise, communication problems will occur.
Figure 3. Setting rotary switches
ADDRESS
0
1
2
3
4
5
6
7
8
9
x1
0
1
2
3
4
5
6
7
8
9
x10
0
1
2
3
4
5
6
7
8
9
x100
Example of before and
after setting addresses
0
5
1
3
6
2
9
4
8
7
Use a 1/8 inch
flathead screwdriver
to set rotary switches.