Start-Up And Shutdown; Sequence Of Operation; Software Operation Overview; Diagram - Trane CenTraVac CDHH Installation, Operation And Maintenance Manual

Start-up and Shutdown

This section provides basic information on chiller operation
for common events.

Sequence of Operation

Adaptive control algorithms are used on CenTraVac™
chillers. This section illustrates common control
sequences.
Software Operation Overview Diagram
The following figure is a diagram of the five possible
software states. This diagram can be thought of as a state
chart, with the arrows and arrow text, depicting the
transitions between states:
• The text in the circles is the internal software
designations for each state.
Figure 59. Software operation overview
Stopping
Preparing to Shut Down
Shutting Down
In the following diagrams:
• The time line indicates the upper level operating mode,
as it would be viewed in the Tracer
• The shading color of the cylinder indicates the software
state.
86
Stopped
Stopped
Run Inhibit
Fast Restart or Satisfied Setpoint
Stop Command or Diagnostic
Running
Running
Running—Limit
®
AdaptiView™.
• The first line of text in the circles is the visible top level
operating modes that can be displayed in Tracer
AdaptiView™.
• The shading of each software state circle corresponds
to the shading on the time lines that show the chiller's
state.
There are five generic states that the software can be in:
• Power Up
• Stopped
• Starting
• Running
• Stopping
Power
Up
Starting
Auto
Waiting to Start
Starting Compressor
• Text in parentheses indicates sub-mode text as viewed
®
in the Tracer AdaptiView™.
• Text above the time line cylinder is used to illustrate
inputs to the Symbio™ 800. This may include user
®
input to the Tracer AdaptiView™ touch screen, control
inputs from sensors, or control inputs from a generic
BAS.
®
CDHH-SVX003C-EN