Yaskawa iQpump Controller User Manual - Manual (Page 243)

G.3 Well Draw Down Function
YASKAWA TM.iQp.06 iQpump Controller User Manual 243
Figure G.1
Figure G.3 Terminal Connections with Schematic
■ 4. Connect Standard Pressure Transducer to Terminal A
Terminal A2 is designed to accept both current and voltage-based feedback devices. By default the iQpump drive is set to 4 ~ 20 mA
input. If the application uses 4 ~ 20 mA input, no parameter changes are necessary and the previous instruction regarding Terminal A1 in
Procedure 3 does not apply.
■ 5. Enable Well Draw Down Function in Parameter P8-01
Setting P8-01 to 1 will automatically change the Terminal A1 input to the Well Draw Down Function and enable the other features for
well draw down level control.
■
6. Set Constant Pressure Setpoint in Monitor U1-01 or Parameter d1-01
In order for the Well Draw Down Function to function properly, the iQpump drive must have a setpoint. U1-01 is the only monitor that
will allow parameter value changes without entering into the programming menu. With U1-01, a user can change the setpoints of
parameter d1-01, d1-02, d1-03, or d1-04 while the drive is running.
■
7. Set the Scale of the Level Transducer in Parameter P8-02
Level transducers have range specifications. If the specification is 0 to 50 ft., the user would set parameter P8-02 to 50, which enters the
maximum value of the range of the transducer and automatically scales the associated parameters.
■
8. Set Well Level to be Maintained in Parameter P8-03
The Well Level Setpoint is the water level at which the iQpump drive will stop regulating pressure and start maintaining level. If the
water level rises above the level set in P8-03, the iQpump drive will automatically switch back to pressure regulation.
■
9. Set Well Level to Sleep in Parameter P8-04
When the water level falls to the Minimum Water Level and the Sleep Delay Time set in P2-03 is reached, the iQpump will fall asleep
and stop running the pump. The pump will remain asleep until the well level reaches the Wake-Up Water Level set in P8-05.
Note: Delay time is set in parameter P2-03.