Yaskawa iQpump Manual Supplement User Manual
Page 15
7 Suction Control via Constant Pressure w/Well Draw Down
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement
15
Duplex System Example
Pump System Settings
• All pumps have the same flow rate and will alternate
• Lag Pump will track speed of lead pump
• All drives have individual discharge transducers rated 150 psi. Upon failure, system will look to network for feedback
information.
• Suction Transducer is rated 75 psi
• Below 40 psi city pressure the pump system will start to reduce speed until reaching 30 psi
• System Auto setpoint 85 psi, with a 5 psi start level.
Duplex System Example (Related Parameters)
Note: In multiplex mode the network signal for suction pressure can be used.
Refer to Transducer Wiring using an External Power
.
Example:
A pump system consisting of a duplex domestic pressure booster system using a pressured city supply averaging 40
- 60 psi. If city pressure starts to fall below 40 psi the pump system will start to slow down to reduce the chances of
pump cavitation. When suction pressure (city pressure) drops to 30 psi, the pump system will shut down (sleep) and
wait until city pressure returns, after which the system will automatically start and operate under normal condition.
Parameter
Description
Booster Pump 1
Booster Pump 2
H3-02
Terminal A1 Gain
231.3%
231.3%
H3-03
Terminal A1 Bias
-25.0%
-25.0%
H3-08
Terminal A2 Signal
2
2
H5-01
Drive Node Network Address
1
2
P1-01
Pump Mode
3
3
P1-03
FD Device Scaling
150 psi
150 psi
P1-04
Start Level
-5.0 psi
-5.0 psi
P8-01
WtrLvl/SuctionPres Selection
2
2
P8-02
Suction Transducer Scaling
75 psi
75 psi
P8-03
Suction Pressure Setpoint
40.0 psi
40.0 psi
P8-04
Minimum Suction Pressure
30.0 psi
30.0 psi
P8-05
Wakeup Suction Pressure
40.0 psi
40.0 psi
P9-02
Feedback Source
2
2
P9-05
Lag Drive Mode
2
2
P9-25
Highest Node Address
3
3
P9-50
Suction Pressure Source
2
2
U1-01
Auto Setpoint
85 psi
85 psi