Duct Temperature Sensor Wiring; Binary Wiring - Trane Tracer Uc

Wiring Installation

Duct Temperature Sensor Wiring

The UC400 controller has separate analog inputs for discharge air sensors and supply air sensors.
The typical mounting position of the supply air sensor is upstream of the VAV unit and connected
into the UC400 controller at AI5 and
air temperature sensor may be downstream of the VAV unit (at the discharge) and connected into
the UC400 controller at AI4 and
Diagrams, " p.
sensor is needed for auto-changeover from cooling to heating mode and vice versa.

Binary Wiring

Binary Input Wiring
Each UC400 controller provides three (3) binary inputs (BI1–BI3) with one being configured for
occupancy with the standard VAV code. The binary inputs 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:
•
•
•
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.
24
77. For standalone VAV units (those not connected to BACnet link), an air supply
Supply air sensor; upstream
Use 18 to 22 AWG.
Maximum wire length 1,000 ft. (300 m).
Refer to "Appendix: Typical Trane Factory Wiring Diagrams, " p. 77
Sensors for Models WTS, WZS, and WDS Installation, Operation and Maintenance Manual
(BAS-SVX04) for zone sensor installation instructions and terminal connections.
(refer to the illustration below). However, the discharge
. Refer to the "Appendix: Typical Trane Factory Wiring
Controls
Discharge air sensor; downstream
and to the Wireless Zone
VAV-SVX07B-EN