Comm+/- terminals are for connections to the building BAS communications and are not for connecting to the equipment. These connections allow access to the building BAS communications through the zone sensor at the RJ11 (phone jack) connection. These connections are not used on BACnet/MSTP connected devices, they are only used on Trane Comm3/4 or Comm5/LON comm links and are for use with Trane Tracer Rover Service Tool.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.