Trane N512, Zone Controller, CNT-SVX07C-EN Peer-to-peer communication, Unit protection strategies

Chapter 5 Sequence of operations

Peer-to-peer communication

Tracer ZN521 zone controllers have the ability to share data with other LonTalk-based controllers. Multiple controllers can be bound as peers, using the Rover service tool, to share:

•Setpoint

•Zone temperature

•Heating/cooling mode

•Fan status

•Unit capacity control

Shared data is communicated from one controller to any other controller that is bound to it as a peer. Applications having more than one unit serv- ing a single zone can benefit by using this feature; it allows multiple units to share a single zone temperature sensor and prevents multiple units from simultaneously heating and cooling.

Unit protection strategies

The following strategies are initiated when specific conditions exist in order to protect the unit or building from damage:

•Smart reset

•Low-coil-temperature protection

•Condensate overflow

•Fan status

•Fan off delay

•Filter-maintenance timer

•Freeze avoidance

•Freeze protection (discharge air temperature low limit)

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