Trane Tracer VV550 User Manual

60 CNT-SVX17G-EN
Sequence of Operations
A ventilation flow controller in the occupied mode uses the communicated ventilation
setpoint or the configured ventilation setpoint for the airflow setpoint. A ventilation flow
controller in the unoccupied mode uses zero for the airflow setpoint.
The ventilation flow control uses nviVentSetpt if it is valid. If nviVentSetpt is not valid, the
ventilation flow control uses one of the following two airflow setpoints:
•If no reh
eat being used, it uses the configured Ventilation Setup Occupied Setpoint;
•If reh
eat being used, it uses the configured Local Heat Minimum Airflow.
Pressure dependent (PD) mode uses the configured minimum position setpoint to
position t
he air valve unless the air valve should be closed.
If the controller is cooling, the active maximum airflow setpoint is the configured
maxi
mum airflow. Otherwise, the active maximum airflow setpoint is the configured
maximum heating airflow.
The active minimum airflow setpoint must be less than the active maximum airflow
setp
oint. The active minimum airflow setpoint and the active maximum airflow setpoint
are limited to 1.2 times the configured nominal airflow. Table 40 below shows space
te
mperature controller active minimum airflow setpoint selection.
Table 40.Space temperature controller active
minimum airflow setpoint selection
PD
a
STC mode
Effective
occupancy
mode
Control
action 
(PAT)
b
Local
reheat
state
Active minimum setpoint (the greatest of the
following)
Do not
care
Off Do not care Do not care Do not
care
0
No Occupied
cool
Occupied
heat
Occupied Cooling Off • Configured minimum airflow
• Ventilation minimum airflow
On • Configured minimum local heating airflow
• Configured minimum airflow
• Ventilation minimum airflow
Heating Off • Configured minimum heating airflow
• Ventilation minimum airflow
On • Configured minimum local heating airflow
• Configured minimum heating airflow
• Ventilation minimum airflow
Standby Cooling Off • Configured standby minimum airflow
• Ventilation minimum airflow
On • Configured minimum local heating airflow
• Configured standby minimum airflow
• Ventilation minimum airflow
Heating Off • Configured standby heat
ing minimum airflow
• Ventilation minimum airflow
On • Configured minimum local heating airflow
• Configured standby heat
ing minimum airflow
• Ventilation minimum airflow

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English