CNT-PRC003-EN
5
®
Auto-commissioning
sequence
Tracer VV550/551 VAV controllers
provide an automatic commissioning
sequence. With a discharge air
temperature sensor installed, this
feature exercises the air valve, fan, and
heat in the box and records the
discharge air temperature before and
after the action. This allows the installer
to easily checkout the operation of the
box and commission by exception. The
data from this test is retained in the
controller for immediate reports or
retrieval at a later date (for comparison
purposes).
Manual test function
A Tracer VV550/551 VAV controller
includes a manual test button, which
enables a technician to easily exercise
the outputs of the controller. On
consecutive button presses, the
controller steps through a predefined
sequence that exercises all of the
controller outputs.
Drive minimum and
maximum from zone sensor
When applied with a Trane zone sensor
module that includes a thumbwheel
setpoint, a Tracer VAV VV550/551
controller can easily be overridden to
minimum and maximum flow. By simply
turning the thumbwheel to
∗
, the
controller drives the air valve to the
minimum cooling flow setpoint.
Similarly, turning the thumbwheel to
∗∗
drives the air valve to the maximum
cooling flow setpoint. This simple
override feature is most useful during
the checkout and balancing phases of a
project.
Trane controller
compatibility
Tracer VV550/551 VAV controllers are
compatible with the latest generation of
Trane control products. The controllers
communicate over a LonTalk
®
communications link. This allows Tracer
VV550/551 VAV controllers to exist on
the same communication wire as other
Trane controllers and to share data with
them as required.
Interoperability
Tracer VV550/551 VAV controllers are
designed with LonWorks
®
technology
and are LonMark
®
certified. They follow
the guidelines of the LonMark
®
Space
Comfort Controller (SCC) profile. As
such, the Tracer VV550/551 controllers
enable control system integration
flexibility.
Wiring diagram
See Figure 3 on page 6.
Wiring diagram 2
