Occupancy modes
CNT-SVX12C-EN 39
• A communicated signal from a peer device (see “Peer-to-peer commu-
nication” on page 41)
• A communicated signal from a BAS
A communicated request, either from a BAS or a peer controller, takes
precedence over local requests. If a communicated occupancy request has
been established and is no longer present, the controller reverts to the
default (occupied) occupancy mode after 15 minutes (if no hard-wired
occupancy request exists). The Tracer ZN517 has the following occupancy
mode options:
• Occupied
• Unoccupied
• Occupied standby
• Occupied bypass
Occupied mode
In occupied mode, the controller maintains the zone temperature based
on the occupied heating or cooling setpoints. The controller uses the occu-
pied mode as a default when other modes of occupancy request are not
present. The fan runs as configured (continuous or cycling). The outdoor
air damper closes when the fan is off. The temperature setpoints can be
local (hard-wired), communicated, or stored default values (configurable
using the Rover service tool or a BAS).
Unoccupied mode
In unoccupied mode, the controller attempts to maintain the zone temper-
ature based on the unoccupied heating or cooling setpoint. The fan cycles
between high speed and off. The outdoor air damper remains closed. The
controller always uses the stored default setpoint values (configurable
using the Rover service tool or a BAS), regardless of the presence of a
hard-wired or communicated setpoint value.
Occupied standby mode
The controller is placed in occupied standby mode only when a communi-
cated occupied request is combined with an unoccupied request from
occupancy binary input BI1. In occupied standby mode, the controller
maintains the zone temperature based on the occupied standby heating
or cooling setpoints. Because the occupied standby setpoints are typically
spread 2°F (1.1°C) in either direction and the outdoor air damper is
closed, this mode reduces the demand for heating and cooling the space.
The fan runs as configured (continuous or cycling) for occupied mode.
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