Trane LO manual Tracer Communication Wiring, Terminal Unit Control TUC

Terminal Unit Control (TUC)

Tracer®

Communication

Wiring

For TUC controlled units that will interface with the Trane Tracer® system or Tracer Summit® building management system, terminate the communication wiring in the control box at the designated terminals on the low voltage terminal strip. Reference the unit wiring schematic or submittals.

Take care to maintain the correct polarity throughout the communica- tion wiring circuit.

Ground shields at each TUC, taping the opposite end of each shield to prevent any connection between the shield and another ground. Refer to Trane publication, EMTX-IOP-1Installation Operation and Programming Guide, for the communication wiring diagram.

Communication wire must conform to the following specification:

·Shielded twisted pair 18 AWG

·Capacitance 23 (21-25) picofarads (pF) per foot

·Listing/Rating - 300V 150C NEC 725-2 (b) Class 2 Type CL2P

·Trane Part No. 400-20-28 or equivalent, available through Trane BAS Buying Group Accessories catalog

Follow these general guidelines when installing communication wiring:

·Maintain a maximum 5000 ft. aggregate run

·Install all communication wiring in accordance with the NEC and all local codes.

·Solder the conductors and insulate (tape) the joint suffi- ciently when splicing communication wire. Do not use wire nuts to make the splice.

·Do not pass communication wiring between buildings because the unit will assume different ground potentials.

·Do not run power in the same conduit or wire bundle with communication link wiring.

88 UNT-IOM-6