YASKAWA iQpump Manual Supplement page 15

Duplex System 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
Example:
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.
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)
Parameter
H3-02
H3-03
H3-08
H5-01
P1-01
P1-03
P1-04
P8-01
P8-02
P8-03
P8-04
P8-05
P9-02
P9-05
P9-25
P9-50
U1-01
Note: In multiplex mode the network signal for suction pressure can be used.
Supply on page 48.
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement
7 Suction Control via Constant Pressure w/Well Draw Down
Description
Terminal A1 Gain
Terminal A1 Bias
Terminal A2 Signal
Drive Node Network Address
Pump Mode
FD Device Scaling
Start Level
WtrLvl/SuctionPres Selection
Suction Transducer Scaling
Suction Pressure Setpoint
Minimum Suction Pressure
Wakeup Suction Pressure
Feedback Source
Lag Drive Mode
Highest Node Address
Suction Pressure Source
Auto Setpoint
Booster Pump 1
231.3%
-25.0%
2
1
3
150 psi
-5.0 psi
2
75 psi
40.0 psi
30.0 psi
40.0 psi
2
2
3
2
85 psi
Refer to Transducer Wiring using an External Power
Booster Pump 2
231.3%
-25.0%
2
2
3
150 psi
-5.0 psi
2
75 psi
40.0 psi
30.0 psi
40.0 psi
2
2
3
2
85 psi
15