Ingersoll-Rand TRANE AFDJ, Инструкция по установке, эксплуатации и обслуживанию

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UC800 AFD Operation
AFDJ-SVU01D-EN 47
Re-optimization
The AF Surge Boundary Offset Coefficient is a user set-
able parameter to be used for adjusting the surge
boundary either higher or lower. In addition to being user
set-able, the surge control algorithm will periodically
readjust this boundary. This re-optimization will occur
when any of three different criteria are met.
1. After start-up stabilization the control will re-optimize
unless the surge is detected in that time period.
2. Every 30 minutes, the control will compare the current
IGV position with the IGV position at the end of the last
re-optimization time and, if greater than the user
adjustable sensitivity, will re-optimize.
3. When the re-optimization timer expires.
The control is re-optimized by increasing the AF Surge
Boundary Offset Coefficient every minute until surge
occurs. When surge occurs, the control will go into surge
recovery until the surge flag is removed and all of the re-
optimization timers will reset.
Figure 45. Start-up surge boundary
0.0
0.6
0.7
0.8
0.9
1.0
1.1
1.2
10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
Pressure Coefficient Trajectory
Start to Full Load
Running surge boundary
P
ressure Coef
ficient
Surge boundary for start up
Boundary increases by 0.1
after 30 minutes
IGV % Capacity
Full load