CVHE-SVX005B-EN
77
Figure 52.
Sequence of operation: Tracer AdaptiView power up
*Display will show
either Auto or Stop
button as
“active
”
(depressed) once
it is ready
10 Sec
First Trane Logo
Grey Screen
User Interface Template...
Black Screen
Loading Data….
Display Ready
20 Seconds
30 Seconds
25 Seconds
Operator Display Boot Up and Load
-
105 sec Total to Display Ready
15 Sec
5 Sec
White Screen
In the following diagrams:
•
The time line indicates the upper level operating
mode, as it would be viewed in the Tracer
®
AdaptiView
™
.
•
The shading color of the cylinder indicates the
software state.
•
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.
•
Boxes indicate control actions such as turning on
relays, or moving the inlet guide vanes.
•
Smaller cylinders under the main cylinder indicate
diagnostic checks.
•
Text outside a box or cylinder indicates time-based
functions.
•
Solid double arrows indicate fixed timers.
•
Dashed double arrows indicate variable timers.
Start-up Sequence of Operation—Wye-
delta
Logic circuits within the various modules will
determine the starting, running, and stopping
operation of the chiller. When operation of the chiller is
required, the chiller mode is set at “Auto.” Using
customer-supplied power, the chilled water pump relay
is energized and chilled water flow must be verified
within 4 minutes and 15 seconds. The controller
decides to start the chiller based on the differential to
start setpoint. With the differential to start criteria met,
the controller then energizes condenser water pump
relay with customer-supplied power (refer to the
following figure).
Based on the Restart Inhibit function and the
Differential to Start setpoint, the oil and refrigerant
pump is energized. The oil pressure must be at least
12 psid (82.7 kPaD) for 60 continuous seconds and
condenser water flow verified within 4 minutes and
15 seconds for the compressor start sequence to be
initiated.
The compressor motor starts in the “Wye”
configuration and then, after the compressor motor has
accelerated and the maximum phase current has
dropped below 85 percent of the chiller nameplate RLA
for 1.5 seconds, the starter transitions to the “Delta”
configuration.
