®
2
CNT-PRC003-EN
Tracer VV550 and Tracer VV551 variable
air volume (VAV) controllers provide
single-duct digital control for VAV boxes.
They support the following VAV control
sequences:
• Space temperature control
• Flow tracking
• Ventilation flow control
The Tracer VV550 VAV controller is
available factory-installed on Trane
VariTrane VAV boxes (Figure 1). The
Tracer VV551 VAV controller is available
for field installation for a variety of VAV
applications (Figure 2).
Figure 1. Tracer VV550 controller
Figure 2. Tracer VV551 controller
(uses same board as Tracer VV550)
Because the Tracer VV550 and Tracer
VV551 VAV controllers use the same
logic controller, both offer the same
wide range of application and control
flexibility. The Tracer VV551 VAV
controller includes additional labor-
saving packaging features for field-
installed applications.
Tracer VV550/551 VAV controllers can
operate as part of a Trane Integrated
Comfort™ system (ICS), as part of a
building management system from
another manufacturer, or as a
standalone device.
When it is part of a Trane ICS, a Tracer
VV550/551 VAV controller enables the
building automation system (BAS) to
perform functions such as scheduling,
trending, alarming, remote
communications, and VAV air system
(VAS) coordination. The controller
communicates with a Tracer Summit
BAS over the LonTalk
®
communications
link. The controller can also
communicate with other building control
systems that are compliant with the
LonMark
®
Space Comfort Controller
(SCC) profile.
Tracer VV550/551 VAV controllers can be
configured using the Rover
™
service
tool. They have the following inputs and
outputs (Figure 3 on page 6):
Analog inputs:
• Space temperature (10 k
Ω
thermistor)
• Space setpoint (1 k
Ω
potentiometer)
• Primary/discharge air temperature
(10 k
Ω
thermistor)
• Primary air flow
Binary inputs:
• Occupancy or generic
Binary outputs:
• Air valve close
• Air valve open
• Heat 1
• Heat 2
• Heat 3 or fan On/Off
Introduction
© 2005 American Standard
All rights reserved
™ ® The following are trademarks or registered trademarks of their respective compa-
nies: ICS, Rover, Tracer, Tracer Summit, and Trane of American Standard Inc.; LonMark,
LonTalk, and LonWorks of the Echelon Corporation.
