Trane Tracer VV550 User Manual

CNT-SVX17G-EN 19
Inputs and Outputs
is valid and the local space temperature analog input is not used to read the space
temperature.
A timed override cancel request clears the occupied bypass timer. Setting the configured
occupied bypass time to zero disables the timed override function. The controller is still
informed of timed override ON requests and timed override cancel requests when the
configured occupied bypass time is set to zero.
Zone Sensor Air Balance Request
To enter the zone sensor air balance mode, position the zone sensor thumbwheel to
either the single star or double star, then press the CANCEL button on the zone sensor
for 10 seconds. Both the local setpoint and the single star and double star functions must
be enabled in configuration.
Zone sensor air balancing takes priority over occupied by
pass. When the controller is in
the zone sensor air balance mode, pressing the ON button for one second increases the
configured airflow measurement gain. No timed override requests are generated when
the controller is in the zone sensor air balance mode. From more information of zone
sensor air balance function, refer to “Zone Sensor Air Balance Function,” p. 55.
Service Pin Message Request
To generate a service pin message request, press the zone sensor ON button for 10
seconds and release. When the zone sensor ON button is released, the service pin
message request is generated. This function is available even when the communicated
space temperature is valid and the local space temperature analog input is not used to
read the space temperature. The request does not change the current value of the
occupied bypass timer.
Space Temperature Failure Diagnostic Request
To generate a space temperature failure diagnostic, press either the ON or the CANCEL
button and hold for more than 25 seconds. This diagnostic automatically resets when the
button is released.
10k Thermistor
Trane
®
wall-mounted zone sensors use a 10k thermistor to measure the space
temperature. The sensors communicate over a hardwired connection. However, if both
a hardwired and communicated space temperature value are available, the controller
ignores the hardwired space temperature input and uses the communicated value.
Internal and External Space Setpoint Adjustment
Zone sensors with an internal or external setpoint adjustment (1k) provide the
controller with a local setpoint (50°F to 85°F or 10°C to 29.4°C). The internal setpoint
adjustment is concealed under the zone sensor cover. To access the adjustable setpoint
wheel, remove the zone sensor cover. The external setpoint (when present) is displayed
on the digital display zone sensor front cover.

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English