GRUNDFOS PRODUCT GUIDE
Redi-Flo3™ and CU 300
Environmental Pumps
60Hz
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Table of Contents
Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .pages 4-5
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .pages 6-7
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .pages 8-12
Performance and Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . .pages 13-17
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 18
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Features and Benefits
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200 250 300 350 400 450 500 550 600 (W)
(%)
MS3
Conventional 3ph
Conventional 1ph
Redi-Flo3 Submersible Pumps
Redi-Flo3 pumps are suitable for both continuous and
intermittent operation for a variety of environmental
applications including:
• Remediation
• Pollution Recovery
• Leachate Recovery
• Dewatering
• Tank Applications
Redi-Flo3 pumps offer the following features:
• Dry-Run Protection
• High Efficiency Pump End and Motor
• High Starting Torque
• Protection Against Up-Thrust
• Soft-Start
• Over- and Under-Voltage Protection
• Overload Protection
• Over-temperature Protection
• Variable Speed
• Electronic Control and Communication
Redi-Flo3 pumps incorporate a totally new motor
design. With the use of permanent-magnet technology
within the motor, Redi-Flo3 pumps deliver unmatched
performance. The combination of permanent-magnet
motors and Grundfos’ own micro frequency converter,
we are now able to communicate with the pump in ways
never before possible. Just a few of the features that
come out of this combination are constant level control,
soft-start and integrated dry-run protection. These are
just a few of the many features that Redi-Flo3 pumps
can offer.
The Redi-Flo3 can operate without the status control
box much like a traditional submersible electric pump.
Some communication and program functions will not
be available in this configuration, but the internal motor
protection features are still active.
Pump and Motor Range
Product Description
Redi-Flo3 10, 22, GPM
Pump End
MSE3NE Single Phase
Motor 1/3 - 1.5 Hp
Dry-Run Protection
The Redi-Flo3 incorporates integrated Dry-Run protection.
When the fluid level falls below the inlet of the pump,
the pump automatically shuts off. After a programmable
period of time, the pump automatically starts up again.
High Motor Efficiency
Redi-Flo3 motors are based on a permanent magnet
rotor, which produce high efficiency within a wide
load range. The high and flat efficiency curve of the
Permanent-Magnet (PM) motor allows for coverage of
a wide power range with the same motor as compared
to conventional submersible AC motors. For Redi-Flo3
pumps, this means only three motors to cover the
horsepower range from 1/3 to 1.5Hp.
Redi-Flo3 pumps use the Grundfos “Smart Motor”.
This permanent-magnet motor is single phase input
and with a 2-wire design makes installation easy. The
combination of integrated microelectronics in the pump
with the optional CU300 status box and R100 at the
surface allows communication with the pump through
standard electrical motor power leads. No additional
wires are required. This feature allows the direct use of
multiple sensors, digital input and relays without adding
extra control electronics and costs.
The surface CU300 status box allows communication
with the “Smart Motor” through the R100 infrared
remote control unit or via the CU300 PC Software
Tool. This gives you the ability to monitor and setup
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or change your pumping system to meet the specific
needs of your application.
High Pump Efficiency
The pump end components are made from Polyvinylidene
Fluoride (PVDF). The pumps are designed to deliver at
peak efficiency levels. Because of high pump efficiencies,
overall power consumption will be reduced.
Features and Benefits
Amps
DOL
sec.
Soft start
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Wear Resistance
Redi-Flo3 pump design uses “floating” impellers. Each
impeller has its own tungsten carbide/ceramic bearing.
This design and the environmental quality of materials
make this pump an excellent choice for environmental
application projects.
Protection Against Up-Thrust
During start-up many pumps start in an up-thrust
condition. To prevent damage caused by up-thrust, a top
bearing has been placed in the motor to protect both
the pump and the motor against up-thrust.
Soft-Start
Redi-Flo3 have a soft-start feature possible because
of the integrated electronics. Soft-start reduces the
starting current and gives the pump a smooth and
steady acceleration.
High Starting Torque
Because of the permanent-magnet motor, the RediFlo3 pumps have excellent starting capabilities. The
high locked rotor torque produced by the PM motor
provides a starting torque that is 1.5 times greater than
conventional submersible pump motors. Even if the
voltage is low, the PM motor will still maintain a high
starting torque.
Overvoltage and Undervoltage Protection
Overvoltage and undervoltage may occur at any time,
especially if you have an unstable voltage supply. The
integrated protection in the Redi-Flo3 motor protects itself
when voltage falls outside of permissible voltage range.
The 230V pump motor will cut out if voltage falls below
150V or above 280V. The motor will automatically start
when the voltage is within the permissible range. It is not
necessary to have additional voltage protection.
Overload Protection
When the pump load rises above the maximum amp level,
the motor will automatically compensate and reduce the
speed to maintain its maximum amp level. If the speed
drops to 65% of the nominal speed, the motor will shut
off.
Overtemperature Protection
Permanent-magnet motors emit very little heat because of
their high efficiency. Redi-Flo3 motors are designed with
an internal circulation system to effectively cool all the
internal components.
As extra protection, the electronic unit also has a builtin temperature sensor. When the temperature rises too
high, the motor will automatically shut-off; when the
temperature drops the motor will automatically restart.
Variable Speed
The Redi-Flo3 “Smart” motor enables continuous variable
speed control within 30%-100% (3,000-10,700 rpm). The
pump can be set to operate at any duty point in the range
between 30% and 100% of the pumps performance curve.
The pump can be adapted to any specific requirement.
The variable speed control requires the status box and R100
or potentiometer.
Installation
Redi-Flo3 pumps can be installed vertically or horizontally
(Note: the pump must not fall below the horizontal level in
relation to the motor). For horizontal installations, a flow
sleeve is recommended to ensure sufficient flow past the
motor to provide proper cooling and prevent the unit from
being buried in sand or silt.
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Applications
Remediation/Pollution Recovery/Dewatering
Connection of a sensor such as a submersible pressure sensor enables the pump via the status control box to
maintain a constant level by starting and stopping the pump based on a desired water level.
Maintaining a Constant Water Table
Introduction
By monitoring the water table and controlling the pump,
the water table can be maintained at a constant level.
EXAMPLES OF APPLICATION:
For example maintaining a constant water table is
useful in the following situations:
• When the groundwater should be kept out of a
building site.
• When the salt water should be kept from penetrating
a borehole with potable water.
Remedial Pumping with Water
Quality Monitoring
Introduction
By means of sensor signals it is possible to carry
out remedial pumping where the water contains
contamination e.g. chemicals, oils, etc.
Description
Pos. Description
1 CU300
2 Level sensor
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Description
Pos. Description
1 CU300
2 pH sensor
Detects the water quality
3 Level sensor
Pumping from One Tank to Another
Where there is a need to move water from one tank to another, the Redi-Flo3 is ideal.
Applications
Description
Pos. Description
1 CU300
2 Level sensor
3 Water tank
NOTE: When the Redi-Flo3 pump is installed
horizontally, it is recommended that a flow sleeve be
fitted. The motor must be fully submerged in the water.
Sensor 1 (tank at top)
Level Description
Max. (stop) When the water has reached this level,
the pump stops. Green indicator light in
on/off-button flashes.
Min. (start) When the water has dropped to this level,
the pump starts. Green indicator light in
on/off-button is constantly lit.
Sensor 2 (bottom tank)
Level Description
Min. (stop) When water has dropped to this level,
tank is empty, stop pump.
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Status Control Box Communication
Redi-Flo3 CU300 Status Box
The CU300 status box is a control and communication
unit especially developed for the Redi-Flo3 submersible
pumps.
The CU300 status box provides:
• Easy adjustment to a specific well
• Full control of Redi-Flo3 pumps
• Two-way communication with the Redi-Flo3 pumps
• Indicator lights on the front to indicate alarms
• The ability to start and stop the pump with the push
of a button.
The CU300 communicates with the pump using the
power leads. It is not necessary to run any extra cables
between the pump and the CU300 status box.
The following alarms can be indicated by the CU300:
• No Contact
• Overvoltage
• Undervoltage
• Dry-run
• Speed Reduction
• Overtemperature
• Overload
• Sensor Alarm
The CU300 incorporates:
• External signal input for three sensors
• relay output for external alarm control
• Control according to the signals received, e.g. flow,
pressure, water level and conductivity
The CU300 can communicate with the R100 infrared
remote control or R100 PC software tool.
R100 Remote Control or PC Software Tool
The R100 allows you to monitor the installation by
reading current operating parameters, such as:
• Power Consumption
• Energy Consumption
• Number of Operating Hours
It allows you to change factory settings. A number of
settings can be made, such as:
• Speed (Performance)
• Constant Pressure Control Mode
• De-watering Function
• Automatic Restart Time
(Inches)
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