Trane Tracer VV550 User Manual

38 CNT-SVX17G-EN
Sequence of Operations
Occupancy Determined by Manual Command
Some communicating devices may request an occupancy mode based on the
information communicated in the communicated occupancy override network variable.
Trane
®
systems and zone sensors do not communicate this information to the controller,
but the controller accepts this network variable.
Note: The receipt of communicated occupancy override with a value other than bypass
causes the
occupied bypass timer to be set to zero.
Occupancy Determined by Schedule
Building automation systems typically communicate an occupancy mode request using
the occupancy schedule input. The controller accepts communicated occupancy
schedule in the communicated occupancy schedule network variable input.
Occupancy Determined by Sensor
Some occupancy sensors may have the capability to communicate an occupancy mode
to the controller. In such devices, the communicated occupancy sensor variable is used
to communicate the occupancy mode to the controller. Trane systems and zone sensors
do not currently send this variable. The hardwired occupancy input of the controller is
handled as if it is a communicated occupancy sensor input. When both a hardwired input
and a communicated input are available, the communicated input is used.
Overriding Occupancy
Some Trane zone sensors include timed override buttons labeled ON and CANCEL. The
controller always recognizes the timed override ON button. Use the timed override ON
button to place the controller in override (occupied bypass mode). Use the timed override
CANCEL button to cancel the override request. Table 26 shows bypass timer actions and
Table 27 shows the result of using the ON b
utt
on in each of the four occupancy modes.
Table 26.Bypass timer action
Zone sensor
buttons
Bypass timer action
None Timer counts down to ze
ro and stops
ON Set bypass timer to the conf
igured occupied bypass
time
a
CANCEL Set bypass timer to zero
Both ON and
CANCEL
b
Set bypass timer to the configured occupied bypass
time
a
a. When an update of the communicated occupancy mode override indicates bypass,
the bypass timer is set to the configured occupied bypass time.
b.If both the ON and CANCEL buttons are pressed simultaneously, it is interpreted as
ON.

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English