Chapter 7 Sequence of operations for the 1 heat/1 cool configuration
54 CNT-SVX06B-EN
Electric heat operation
The Tracer ZN511 supports a single stage of electric heat for 2-pipe appli-
cations (see Table 12). Electric heat can only be used as the primary heat
source, not as a second stage of heating. Electric heat is cycled on and off
to maintain zone temperature at the active heating set point.
Outdoor air damper operation
The Tracer ZN511 supports a two-position outdoor air damper. The
damper is used as a source for ventilation air only, not as a cooling source
(economizer). In occupied and occupied standby mode, the damper is open
when the fan is on and closed when the fan is off. In occupied standby and
unoccupied mode, as well as during morning warm-up and morning cool-
down, the damper remains closed.
Peer-to-peer (master/slave) data
sharing
Tracer ZN511 zone controllers have the ability to share data with other
LonTalk-based controllers. Several controllers can be bound as peers,
using the Rover service tool, to share:
• Set point
• Zone temperature
• Heating/cooling mode
• Fan status
• Unit capacity control
Shared data is communicated from the controller assigned as master to
the other (slave) controllers. Applications having more than one unit serv-
ing one zone can benefit by using this feature, which prevents multiple
units from simultaneously heating and cooling.
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