26 BAS-SVX084A-EN
Wiring Installation
Binary Wiring
Binary Input Wiring
Each Symbio 210 controller provides one (1) binary input (BI1), which is configured for occupancy
with the standard VAV code. The binary input can be configured with the Tracer TU service tool for
occupancy or other use. The input associates 0 Vac with open contacts and 24 Vac with closed
contacts. It is activated by a dry contact switch closure. Binary input wiring must meet the following
requirements:
• Use 18 to 22 AWG.
• Maximum wire length 1,000 ft. (300 m).
•Refer to “Appendix: Typical Trane Factory Wiring Diagrams,” p. 73 and to the Wireless Zone
Sensors for Models WTS, WZS, and WDS Installation, Operation and Maintenance Manual
(BAS-SVX04) for zone sensor installation instructions and terminal connections.
Occupancy Binary Input
The occupancy binary input can be configured as normal open (NO) or normal closed (NC).
Occupied is the normal state and the initial state at power-up and after a reset. Unoccupied is the
other state. If the binary input is set as Out of Service, the default occupancy mode is occupied.
Binary Output Wiring
Binary outputs that are required for unit operation are factory wired and commissioned. The
Symbio 210 controller does have extra binary outputs available for many other configurations. To
program the extra outputs refer to the Tracer BACnet VAV Controllers Applications Guide, (BAS-
APG010-EN).
Figure 9. Duct sensor locations and wiring
Discharge air sensor;
downstream
Controls
Supply air sensor; upstream
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