Yaskawa iQpump Programming Manual - Manual (Page 148)

148 YASKAWA TM.iQp.02 iQpump Drive Programming Manual
Figure 1.113
Figure 118
Auxiliary Pump De-Staging (OFF)
The de-staging of the auxiliary pumps 2 and 3 will occur in the reverse order of the staging process described previously.
The de-staging of auxiliary pump 3 occurs when the output frequency falls below the Pump 3 Frequency Shutdown Level (P3-10) and the
difference between the system’s feedback minus the setpoint exceeds the value programmed in the Shutdown Pump Delta Level (P3-05)
for the time programmed in the Add Pump Delay Time (P3-04).
The de-staging of auxiliary pump 2 occurs when the auxiliary pump 3 is de-staged and the output frequency falls below the Pump 2
Frequency Shutdown Level (P3-09) and the difference between the system’s feedback level minus the setpoint exceeds the value
programmed in the Shutdown Pump Delta Level (P3-05) for the time programmed in Shutdown Pump Delay Time (P3-06). Refer to
Figure 119 for the de-staging of the auxiliary pumps using the “output frequency + feedback level” control method.
System
Set-Point
Start Level
P1-04
0%
Auto Mode Run
OFF Mode
Multi-function
Output #41
Wait for Start
Start System
Start System, Incoming Run Command
TIME
Multi-function
Output #40
START DELAY
AUTO MODE RUN: PUMP 1
RUN
Feedback
ADD PUMP 2
Close Contact
ADD PUMP 3
Close Contact
Start Level Delay
P1-05
Add Pump Delay Time
P3-04
Multiplex Stablize Time
P3-11
Add Pump Delay Time
P3-04
Multiplex Stablize Time
P3-11
Add Pump Delta Level P3-03
Multi/Maximum
Level P3-02
Output Frequency