74 P9 ASD Installation and Operation Manual
WARNING! — THE FOLLOWING STEP WILL START THE MOTOR!
Figure 31. The Maximum Threshold Value.
Figure 32. Set the Minimum Threshold Value.
10. Set the system for normal
flow and ensure that all
system valves are set for
normal operation.
11. Place the system in the Hand
mode and press the Run key.
The system will run at the
Upper Limit setting (F012).
12. Click Next to continue.
The Motor/Pump combination capacity is automatically calculated and displayed as the
Maximum threshold. Normally, no further adjustment is required for the Maximum
threshold setting.
The Maximum threshold value may be adjusted, if required, at F395. The Maximum
threshold setting (F395) minus the F482 setting comprises the range of the Maximum
threshold zone.
Vi
rtual Linear Pump Maximum Zone
13. The Minimum threshold value
setting is typically above the
electrical stall of the motor,
above the minimum system
pressure, above the manual
change plateau, and well below
the typical operating point of
the system.
Click in the Minimum
threshold field and, using the Rotary Encoder, slowly decrease the Minimum threshold
value while observing the LED display.
If either of the conditions listed below should occur while decreasing the Minimum
threshold value, increase the Minimum threshold number until the condition is no longer
true to set the Minimum threshold:
• The motor stalls,
• The output frequency is greater than the setting of F505, or
• The output frequency no longer changes with continued Virtual Linear Pump number
changes.
The Minimum threshold setting (F394) plus the F481 setting comprises the range of the
Minimum threshold setting.
Virtual Linear Pump Minimum Zone
To Next Page
Loading...
