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 51. Software operation overview
Stopping
Preparing to Shut Down
Shutting Down
CVHE-SVX005C-EN
Stopped
Stopped
Run Inhibit
Fast Restart or Satisfied Setpoint
Stop Command or Diagnostic
Running
Running
Running—Limit
•
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
®
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