Trane Symbio 210 Installation, Operation And Maintenance Manual page 24

Wiring Installation
Wireless Communicating Sensor
The following Air-Fi® wireless sensors are available for Symbio 210.
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See BAS-SVX40 Air-Fi Wireless System IOM for part numbers.
Zone Sensor Mounting and Wiring
Mounting Location
A zone sensor in each control zone should be located in the most critical area of the zone. Sensors
should not be mounted in direct sunlight or in the area supply air stream. Subdivision of the zone
may be necessary for adequate control and comfort. Avoid mounting zone sensors in areas subject
to the following:
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Wiring
Each unit must be controlled by a zone sensor that utilizes a standard 10K at 77°F thermistor for
temperature outputs. Field wiring for the zone sensors must meet the following requirements:
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Important:
Zone Sensor Communication Stubs
The wire that runs from a zone sensor to a unit controller is commonly referred to as the
communication stub. It is the wire that goes from the IMC terminal link on the Symbio 210 controller
down to the zone sensor. At least one zone sensor per area or controller network should include
the optional communications module. Installing additional sensors with the communications
module provides added convenience for the service technician.
Important:
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WCS-SB: Base sensor, no display
WCS-SD: Display sensor
WCS-SO: Occupancy sensor
WCS-SCO : CO sensor
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WCS-SB/R: Remote monitoring sensor
WCS-SH: Humidity module
WCI Wireless Communicating Interface
Drafts or dead spots behind doors or corners.
Hot or cold air ducts.
Radiant heat from the sun or appliances.
Concealed pipes or chimneys.
Surfaces not heated or cooled behind the sensor such as outside walls.
Airflows from adjacent zones or other units.
Avoid locations outside of the operating temperature and the humidity range.
Use 18 to 22 AWG stranded, tinned-copper, shielded, twisted-pair wire, recommended.
Maximum wire length 300 ft. (91 m).
All wiring must be in accordance with the NEC and local codes.
If local codes require enclosed conductors, install the zone sensor wires in the conduit.
Refer to "Appendix: Typical Trane Factory Wiring Diagrams," p.
Control wires and power conductors can never be near each other (except at 90
degrees). Do not run power wired through same conduit as signal wires.
There is no limitation on the number of stubs that can be wired from the Symbio 210
controller. Polarity must be maintained and the length limit is 300 ft (91 m).
73.
BAS-SVX084A-EN