Grundfos Redi-Flo 2, Redi-Flo 4, Redi-Flo VFD NEMA 1 Nstallation And Operating Instructions

Redi-Flo Variable

Performance Pumps

Installation and

Operating Instructions

Please leave these instructions with the
Redi-Flo equipment for future reference

LIMITED WARRANTY

LIMITED WARRANTY

All Redi-Flo products manufactured by GRUNDFOS are warranted to the
original user only to be free of defects in material and workmanship for the
following periods of time. Redi-Flo VFD and Redi-Flo4™ variable performance
pumps: 18 months from the date of installation, but not more than 24 months
from the date of manufacture; Redi-Flo2® pumps; 12 months from date of
installation, but not more than 18 months from the date of manufacture,
whichever comes first.

GRUNDFOS' liability under this warranty shall be limited to repairing or
replacing at GRUNDFOS' option, without charge, F.O.B. GRUNDFOS' factory
or authorized service station, any product of GRUNDFOS manufacture.
GRUNDFOS will not be liable for any costs of removal, installation, transportation,
or any other charges which may arise in connection with a warranty claim.
Products which are sold but not manufactured by GRUNDFOS are subject to
the warranty provided by the manufacturer of said products and not by
GRUNDFOS' warranty. GRUNDFOS will not be liable for damage or wear to
products caused by abnormal operating conditions, accident, abuse, misuse,
unauthorized alteration or repair, or if the product was not installed in accordance
with GRUNDFOS' printed installation and operation instructions.

To obtain service under this warranty, contact the Distributor or Dealer from
which it was purchased to obtain instructions. Under no circumstances

should defective product be returned to the Distributor, Dealer, or
GRUNDFOS without a Return Materials Authorization (RMA).

GRUNDFOS WILL NOT BE LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES, LOSSES, OR EXPENSES ARISING FROM
INSTALLATION, USE, OR ANY OTHER CAUSES. THERE ARE NO EXPRESS
OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, WHICH EXTEND BEYOND THOSE
WARRANTIES DESCRIBED OR REFERRED TO ABOVE.

Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages and some jurisdictions do not allow limitations on how
long implied warranties may last. Therefore, the above limitations or exclusions
may not apply to you. This warranty gives you specific legal rights and you may
also have other rights which vary from jurisdiction to jurisdiction.

Grundfos Pumps Corporation • 3131 N. Business Park Ave., Fresno, CA 93727

Customer Service Centers: Allentown, PA • Fresno, CA

Phone [phone] • Fax [phone]

Canada: Oakville, ONT • Mexico: Apodaca, N.L.

Visit our website at www.us.grundfos.com

L-RF-IO-006 06/00

PRINTED IN USA

SAFETY WARNING

Electrical Work

Before beginning installation procedures, these installation and operating instructions should
be studied carefully. All electrical work should be carried out by a qualified electrician in
accordance with the latest edition of the National Electrical Code(NEC), local codes and
regulations.

Adherence To Environmental

Regulations

When handling and operating the Redi-Flo Variable Performance Pump system, all
environmental regulations concerning the handling of hazardous materials must be observed.
When the pump is taken out of operation, great care should be taken to ensure that the pump
contains no hazardous materials that might cause injury to human health or to the environment.

Returning a Pump for Service

Only pumps that are certified as uncontaminated will be accepted by GRUNDFOS for
servicing. GRUNDFOS must receive this certification prior to receiving the pump. If not,
GRUNDFOS will refuse to accept delivery of the pump. In these cases, all costs incurred in
returning the product to the customer will be paid by the customer. Contact your distributor
for details on returning Redi-Flo products for servicing.

Electrical Hazards

The Redi-Flo Variable Performance Pump system is not approved for Class 1, Division 1,
Group D locations as specified by the National Electrical Code (NEC). Consult local authorities
and regulations if you have any doubt about its suitability for a specific application.

WARNING

Hazard of Electric Shock: Do not expose the Redi-Flo Variable Frequency Drive
(VFD) to moisture. If unavoidable exposure to moisture occurs, disconnect the
electrical supply power immediately and have the unit inspected by an authorized
service center to insure all safety features of the unit are in tact. To reduce the
risk of electrical shock during operation of this Redi-Flo product, extreme care
should be taken to ensure adequate grounding. All Redi-Flo products are provided
with grounding provisions which comply with NEC guidelines. Always verify power
source is properly grounded and there is a solid ground connection between the
power source and the Redi-Flo VFD before energizing. If the means of connection
to the supply power source is other than grounded metal conduit, ground the Redi­Flo VFD back to the service by connecting a copper conductor, at least the size
of the circuit supplying the Redi-Flo VFD, to the grounding screw/terminal provided
within the wiring compartment of the Redi-Flo VFD.

Page 1

TECHNICAL SPECIFICATIONS

Redi-Flo Variable Frequency Drive

(Type: SI/MP1-115/230V)

ELECTRIC

Input 115V +/- 10% / 1 PH / 48-62 Hz / 23A

230V +/- 10% / 1 PH / 48-62 Hz / 23A

Output with 115V Input 1.5 kw / 400 Hz / 220V / 3 PH / 5.5A (RF2)

1.5 kw / 80 Hz / 230V / 3 PH / 5.5A (RF4)

Output with 230V Input 1.5 kw / 400 Hz / 220V / 3 PH / 5.5A (RF2)

2.0 kw / 100 Hz / 230V / 3 PH / 6.7A (RF4)

Overload Rating 5.5A for 1 minute (RF2)

7.5A for 1 minute (RF4)

Acceleration Time (factory preset) 0 to 400 Hz: 5 seconds (RF2)

0 to 100 Hz: 5 seconds (RF4)

Deacceleration Time (factory preset) 400 to 0 Hz: 5 seconds (RF2)

100 to 0 Hz: 5 seconds (RF4)

Recommended Input Protection (115V) Fuse, 1 each, 250V, 25A, UL Class RK1

or circuit breaker, 25A/300V/1P

Recommended Input Protection (230V) Fuse, 2 each, 250V, 25A, UL Class RK1

or circuit breaker, 25A/300V/2P

Power Cord SJTW, 14 AWG, 10', NEMA PH-185 Plug
Output Ground Fault Protection Built-in (1000 mA)
Minimum Frequency (factory preset) 115 or 230V 25 Hz
Maximum Frequency (factory preset) 115 or 230V 400 Hz (RF2)

115V 80 Hz* (RF4)

*Auto Frequency Limiting

230V 100 Hz (RF4)

DIMENSIONS AND WEIGHT

1

Dimensions Protective case is 9"x14"x18

VFD Only - 6" x 7

Net Weight (VFD, Cord & Case) 20 lbs. (10

1

1

¤2" x 10 1¤2 "

¤2 lbs. - VFD only)

¤2"

OPERATING CONDITIONS VFD ONLY

Ambient Temperature 14°F to 120°F (-10°C to 50°C)
Elevation Up to 3,300 ft. without derating

STORAGE CONDITIONS

Ambient Temperature -4°F to 140°F (-20°C to 60°C)
Relative Humidity 95%, Non-condensing

PROTECTIVE CASE CONSTRUCTION

Case High density polyethylene
Trim Aluminum
Lock Military twist type, steel with zinc plating

MINIMUM GENERATOR SIZE

Redi-Flo2
For Generators with Voltage Regulation 2500 Watts at 115/230 VAC, single phase
For Generators without Voltage Regulation 5000 Watts at 115/230 VAC, single phase
Recommended For Optimal Performance 4000 Watts at 115/230 VAC, single phase

Redi-Flo4™
For Generators with Voltage Regulation 3400 Watts at 115/230 VAC, single phase
For Generators without Voltage Regulation 6700 Watts at 115/230 VAC, single phase
Recommended For Optimal Performance 5400 Watts at 115/230 VAC, single phase

®

with voltage regulation.

with voltage regulation.

Note: RF2 = Redi-Flo2® RF4 = Redi-Flo4™

Page 2

TECHNICAL SPECIFICATIONS

Redi-Flo2® Pump & Motor

ELECTRIC

Full Load Rating .5 HP / 220V / 3 PH / 400 Hz / 5.5A
Maximum Current (SFA) 5.5 amps
Motor Protection Thermal overload - Thermik Geratebau,

Series SY6 - (176°F [80°C])
Current Overload - Incorporated into

Redi-Flo VFD (9.0A for 10 seconds)

PIPING CONNECTION

1

Discharge Port

OPERATING CONDITIONS

Minimum Ambient Fluid Temperature 34°F (1°C)
Maximum Ambient Fluid Temperature 80°F (28°C)

¤2" Female NPT

MOTOR FLUID

Motor Lubricating Fluid Deionized (DI) Water

STORAGE CONDITIONS

Minimum Ambient Temperature 34°F (1°C)
Maximum Ambient Temperature 120°F (50°C)

DIMENSIONS AND WEIGHT (PUMP AND MOTOR)

Dimensions 11.3" length x 1.81" diameter

Net Weight 5.5 lbs., excluding motor lead

LEAD LENGTHS

Standard Lengths in Feet 30, 50, 75, 100, 125, 150, 175, 200,

250, 300

Custom Lengths Available in 1 ft. increments from

30 to 300 ft.

Page 3 Page 4

TECHNICAL SPECIFICATIONS

Redi-Flo4

Variable Performance Pump & Motor

ELECTRIC

Full Load Rating 2.0 HP / 230V / 3 PH / 60 HZ / 6.7A
Service Factor 1.25
Maximum Current (SFA) 7.5 amps
Motor Protection Redi-Flo VFD supplies protection for motor

Motor has no internal protection

PIPING CONNECTION

Discharge Port 5E8 -- 1" Female NPT

10E5 -- 1
16E4 -- 1
25E3 -- 1

1

¤4" Female NPT

1

¤4" Female NPT

1

¤2" Female NPT

OPERATING CONDITIONS

Minimum Ambient Fluid Temperature 34°F (1°C)
Maximum Ambient Fluid Temperature 104°F (40°C)

STORAGE CONDITIONS

Motor Fluid Deionized (DI) water with 30% propylene

glycol

STORAGE CONDITIONS

Minimum Ambient Temperature -4°F (-20°C)
Maximum Ambient Temperature 120°F (50°C)

DIMENSIONS AND WEIGHT (PUMP AND MOTOR)

5E8 26
10E5 23
16E4 22

3

¤16" (length) 37 lbs.

3

¤4" (length) 35 lbs.

7

¤8" (length) 34 lbs.

25E3 22" (length) 34 lbs.
Maximum Diameter 3

Standard Lengths in Feet

*With Redi-Flo4™ Variable Performance Pumps, you must have an adapter cord to connect
to Redi-Flo VFD. See page 29, Parts, and Accessory List, Redi-Flo VFD x RF4 Variable
Performance Pump section.

31

¤32"

LEAD LENGTHS*

(25 ft. increments) 25' to 600' All models

REDI-FLO VFD SPECIAL FEATURES

Redi-Flo Variable Frequency Drive

For more detailed information on the following features, see Operator Adjustments and
Redi-Flo VFD Inputs & Outputs on page 11-12 and 15-16).

Dual Input Capability

Redi-Flo VFD can accept 115V or 230V input voltage available in one unit

Enclosure

The Redi-Flo VFD NEMA 1 enclosure is designed to provide a degree of protection against
personnel contact with the internal electrical components. Care must be used to prohibit
moisture from coming into contact with the unit.

UL Approvals

The Redi-Flo VFD is UL Listed to U.S. and Canadian electrical safety standards.

10-Turn Potentiometer

The Redi-Flo VFD is equipped with a "10-Turn Pot" for finer adjustment of motor speed and
pump performance.

Dual Functionality

The Redi-Flo VFD can change from operating Redi-Flo2® (MP1) to Redi-Flo4™ Variable
Performance pumps with a turn of a dial.

Output Ground Fault Protection

Built-in ground fault sensing for protection of Redi-Flo VFD and down hole equipment.

Grundfos Repairable

The Redi-Flo VFD can be repaired at all Grundfos Customer Service Centers for fast turn­around.

Dry Run Protection (Input Undercurrent Trip)

The Redi-Flo VFD can protect pumping equipment from damage as a result of "dry run"/ "pump
off" conditions at frequencies above 50 HZ for Redi-Flo4™ and above 300 HZ for Redi-Flo2
This feature can be further configured for automatic restart of the Redi-Flo VFD after a time
period adjustable from 1 to 99 minutes.

Output Frequency Limited by Input Current

The output frequency is clamped when the input current reaches 16.0 amps, regardless of
input voltage. The clamped output frequency prevents overload of 20 amp circuit breaker and
portable 115V generator sets.

Torque Boost

The Redi-Flo VFD is equipped with an adjustable torque boost (voltage boost) feature to aid
in start-up under severe conditions.

Optimized Volts/Frequency (V/HZ) Pattern

The Redi-Flo VFD V/f pattern is specially optimized to allow the most efficient operation of
Redi-Flo2

®

and Redi-Flo4™ variable performance pumps.

®

.

Page 5

REDI-FLO VFD SPECIAL FEATURES

External Speed Reference Signal Following Capability

The Redi-Flo VFD will follow an external 4-20 mA speed reference signal when the mode
selector dial is switched from Manual to Automatic Operation (RF2A and RF4A).

Isolated 24 Volt DC Power Supply

The Redi-Flo VFD is equipped with an isolated 24 VDC-100 mA power supply for use as a loop
power source for an external 4-20mA transducer (transmitter) or flowmeter.

On/Off Control Terminals

The Redi-Flo VFD provides easy connection of liquid level controls for on/off operation.

Auxiliary Contacts

1. Redi-Flo VFD run acknowledge: contact closed when Redi-FloVFD is powered and
ready for operation (i.e., RSR switch in run position).

2. Redi-Flo VFD fault annunciation: "Form C" contacts closes upon fault. Annunciated
faults are over temperature (
overload (
current (

3. Speed reached acknowledge: contact closed when Redi-Flo VFD has reached the
speed/frequency set on the10-turn potentiometer. Typically used to enable
external timers or counters.

), VFD overload ( ), ground fault ( ), over current ( ), and under

), under current 1 ( ) under current restart ( ).

), under voltage( ), over voltage( ), motor

NOTE: All contacts rated 2A at 250 VAC/30 VDC.

Frequency/Fault/Status Display

The Redi-Flo VFD has an easy to read,
fault annunciation. A four (4) place digital frequency display (XXX.X) and fault code
annunciation ensure precise adjustment and easy diagnostics. See Troubleshooting
section, pages 17-18.

3

/4" high–7segment LED, frequency display and

PRE-INSTALLATION CHECKLIST

Components of Your Redi-Flo VFD System

Your Redi-Flo Variable Performance Pump system should contain the following
components:

1. Redi-Flo Variable Frequency Drive, SI/MP1-115/230V (See Figure 1)

2. Either a Redi-Flo2® pump and motor with lead
(Figure 2) or a Redi-Flo4™ Variable Performance

pump, motor, lead,lead/plug and RF4 x VFD
adapter cord (Figure 3).

The pump

will be
stored

here

Figure 2

Figure 1

Figure 3

Page 6

PRE-INSTALLATION CHECKLIST ASSEMBLING THE REDI-FLO VFD SYSTEM

To operate the system you will also need:

1. A discharge hose or pipe to connect to the pump (See Figure 4).

2. An electrical plug to connect the Redi-Flo VFD power cord to your portable
generator may be needed if the supplied plug is not compatible with your generator
(See Figure 5).

3. Safety cable and hardware for lowering and lifting the pump (See Figure 6).

Figure 4

Figure 5

The exact type of plug used will depend
upon your generator, The Redi-Flo VFD
is supplied with a standard NEMA, 115V,
3 prong plug.

Figure 6

Page 7

Redi-Flo2

®

Redi-Flo4

™

SAFETY WARNING

All electrical work should be performed by a qualified electrician in
accordance with the latest edition of the National Electrical Code,
local codes and regulations.

Unpack the components of the Redi-Flo Variable Performance System. With Redi-Flo2®
pumps, the pump will be packed in the center of the motor lead spool as shown on page 6,
Figure 2. Make sure that you have the correct pump for the installation. If you purchased a
Redi-Flo4™ pump in component form, see instructions on pages 25-26, and refer to the Redi­Flo4™ Installation guide for assembly instructions.

Attaching the Pump to the Pipe

When connecting piping to the pump, a back-up wrench should be used. Redi-Flo4™ pumps
should only be gripped by the flats near the top of the discharge chamber. Under no
circumstances grip the body of the pump, cable guard or motor. When tightened down, the
threaded end of the first section of riser pipe or nipple must not come in contact with the check
valve retainer in the discharge chamber of the pump. After the first section of pipe has been
attached to the pump, the safety cable should be connected to the pump(as shown if figure

6). Do not clamp to the pump. When raising the pump, be careful not to place bending stress
on the pump by picking it up by the pump end only. A safety cable should be attached to the
pump (using special brackets and cables, sold separately) anytime plastic pipe or flexible
tubing is used. A check valve may also be added to Redi-Flo2® pumps to prevent fluid from
flowing back into the pump after it is turned off (backflow prevention). A check valve is
standard on Redi-Flo4™ pumps. Always check to ensure joints are fastened securely. The
use of a torque arrestor is not required when using the Redi-Flo VFD.

Attaching Redi-Flo lead to well plug

pigtail

The Redi-Flo4 is supplied with a special well plug and submersible lead splice kit.

Page 8

INSTALLATION AND OPERATION FOR THE

REDI-FLO VFD SYSTEM

Lowering the Pump Into the Well

Make sure the electrical motor leads are not cut or damaged in any way when the pump is
being lowered into the well. Do not use the motor leads to support the weight of the pump.

To protect against surface water entering the well and contaminating the well, the well should
be finished off utilizing a locally approved well seal, unit or a Grundfos Redi-Flo well seal.

The motor lead should be secured to the discharge pipe at frequent intervals to prevent
sagging, looping and possible motor lead damage. Teflon® wire ties are recommended for
environmental applications.

IMPORTANT

Plastic pipe and tubing tend to stretch under load. This stretching must be taken into account
when securing the motor lead to the riser pipe or tubing. Leave three to four inches of slack
between clipped points. This tendency to stretch will also affect the calculation of the pump
setting depth. When plastic pipe or tubing is used, it is recommended that a safety cable be
attached to the pump to raise and lower it. Redi-Flo4™ pumps are designed to accommodate
this cable and Redi-Flo2® pumps can be fitted with a safety cable bracket
(part number 1A0019).

Operating Conditions

To ensure the Redi-Flo Variable Performance Pumping system operates properly, follow
these guidelines:

• The Redi-Flo2® or Redi-Flo4™ pump must be installed vertically with the discharge
end pointed upwards.

• The electrical voltage supply to the Redi-Flo VFD must always be within + or - 10%
of the specified power supply ( 103.5 - 126.5 VAC at 115V settings or 207 - 253 VAC
at 230V ).

• For best performance when operating on a generator, 115V generators should be set
at 120V without load and 230V generators should be set at 240V without load. Use a
separate meters to set voltage; do not rely on built-in meters on generators.

• The pump and motor must always be completely submerged in fluid to ensure
lubrication and cooling of the motor.

• The temperature of the fluid being pumped should be according to the technical
specifications (Pages 3-4).

• The installation depth of the pump should always be at least three feet below the
maximum drawdown level of the well.

• Redi-Flo pumps are not recommended for well development or pumping fluid
containing abrasives.

• Redi-Flo2® pumps are not recommended for continuous operation applications.

• The warranty of the Redi-Flo pumps will be void if other than the Redi-Flo, is
used or if corrosive fluids are pumped.

• The service life of dedicated Redi-Flo pumps may be compromised if the ambient
water quality exceeds one or more of the following values:

pH<5 DO>2 ppm H2S>1 ppm CL->500 ppm TDS>1000 ppm

Page 9

Teflon® is a registered trademark of DuPont

ASSEMBLING THE REDI-FLO VFD SYSTEM

Starting

To operate the Redi-Flo VFD system, simply:

1. Submerge the RF2 or RF4 pump in the water to be pumped.

#2 and #3 for operation with generator only.

2. If using a generator, start the generator and allow it to warm up.

Figure 7

SI/MP1
Front
Panel

3. If the generator has a circuit breaker,
close the breaker and check the output
voltage from the generator. The output
voltage must be within the specified
ranges (refer to Technical Specifications,
page 2) to ensure proper operation and
prevent damage to the system. If the
voltage is too high or too low, adjustments
to the generator must be performed to
allow the system to run.

4. Plug the Redi-Flo VFD into the generator or
connect to power supply in accordance to the
National Electric Code, and/or local ordinance.

5. Select RF4M (Redi-Flo4™ manual operation) or RF2M (Redi-Flo2® manual operation)
with the Mode selection knob, depending on the pump to be operated.

6. Connect the motor lead to the Redi-Flo VFD. (Note: With RF4 Variable Performance
Pumps you must have an adapter cord to connect to Redi-Flo VFD). See page 29,
Parts List, Redi-Flo VFD x RF4 Variable Performance Pump Accessories section.

7. Check the frequency display on the Redi-Flo VFD. It should read "0.0" (zero).
If it doesn't, refer to the Troubleshooting section on page 17-18.

8. If this is the first time the Redi-Flo VFD is being used or it has not been used for more
than six months, leave the Redi-Flo VFD on for at least 5 minutes before proceeding
to the next step.

9. Set the Redi-Flo VFD speed dial to the desired performance. If unknown,
it is recommended to turn the speed dial completely counter clockwise to lowest
speed setting and then adjust up after starting.

10. Start the pump by switching the Redi-Flo VFD run/stop/reset (RSR) switch to run.

11. Adjust the pump performance to the desired level by turning the speed dial (10-turn
potentiometer) until the desired performance is attained.

Stopping

To stop the pump, switch the RSR switch to stop. It is not necessary to reduce the speed of
the motor before switching the RSR switch to stop. You should unplug the Redi-Flo VFD from
the generator BEFORE removing the motor lead from the Redi-Flo VFD or turning off the
generator.

Page 10

ASSEMBLING THE REDI-FLO VFD SYSTEM

Purging A Well

If the pump is used to purge a well, start the pump at minimum speed and gradually increase
to maximum speed. Do not stop the pump until the pumped fluid contains no visible particles
(to avoid blockage within the pump). Redi-Flo products are not recommended for well
development.

REDI-FLO VFD OPERATOR ADJUSTMENTS

Operator Adjustable Control Features for Custom Operation
(See flowchart on page 14 for steps required to adjust parameters. Parameter list
shows function no., description, range, and factory preset default settings)

F00-RF2 MAXIMUM FREQUENCY (FMAX): Factory preset at 400HZ for Redi-Flo2®

pumps. Maximum frequency is adjustable from 400-100HZ. To adjust maximum
frequency follow the steps on the flowchart on page 14.

F01-RF2 MINIMUM FREQUENCY (FMIN): Factory preset at 25HZ for the Redi-Flo2®
pumps. Minimum frequency is adjustable from 0-100HZ. To adjust minimum frequency
follow the steps on the flowchart on page 14.

F02-RF4 MAXIMUM FREQUENCY (FMAX): Factory preset at 100HZ for Redi-Flo4™
variable performance pumps. Maximum frequency is adjustable from 0.0-100HZ. To
adjust maximum frequency follow the steps on the flowchart on page 14.

F03-RF4 MINIMUM FREQUENCY (FMIN): Factory preset at 25HZ for Redi-Flo4™
variable performance pumps. Minimum frequency is adjustable from 0-30HZ. To adjust
minimum frequency follow the steps on the flowchart on page 14.

F04-ACCELERATION TIME (ACCEL): Factory preset at 5 seconds. Acceleration time is
adjustable from 0.5-10 seconds. To adjust acceleration time follow the steps on the
flowchart on page 14.

F05-DEACCELERATION TIME (DECEL): Factory preset at 5 seconds. Deacceleration
time is adjustable from 0.5-10 seconds. To adjust deacceleration time follow the steps on
the flowchart on page 14.

F06-TORQUE BOOST(BOOST): Torque Boost is used to increase startup torque at low
speeds. Factory preset at zero. Torque Boost is adjustable from 0-30%. To adjust follow
the steps on the flowchart on page 14.

Page 11

SI/MP1 REDI-FLO VFD OPERATOR ADJUSTMENTS

F07-BASE FREQUENCY(MAINS F): Factory preset at 60HZ. Base Frequency is
adjustable to 50HZ or 60HZ. To adjust base frequency follow the steps on the flowchart
on page 14.

F08-MOTOR OVERLOAD(IXT LEVEL): Factory preset at 110%. The Redi-Flo VFD will
trip after 1 minute when output current exceeds 5.5A for Redi-Flo2® pumps and 7.5A for
Redi-Flo4™ pumps. The motor overload is adjustable from 50-110%. To adjust motor
overload trip current, follow the steps on the flowchart on page 14.

F09-UNDERCURRENT(UC ENABLE): Factory preset at (0) disabled. Input under current
detection level is adjustable either to (0) disabled or (1) enabled. To adjust UC level, follow
the steps on the flowchart on page 14.

F10-INPUT UNDERCURRENT LEVEL(UC LEVEL): Factory preset at 30%. Input
undercurrent detection level is adjustable from 10-60%. The input undercurrent trip level is
adjustable from 1.6-9.6A. To adjust detection level, first enable (F09) then adjust level
(F10) by following the steps on the flowchart on page 14.
**The Redi-Flo VFD can protect pumping equipment from damage as a result of “dry
running” at frequencies above 50Hz for the Redi-Flo4™ or above 300Hz for the Redi­Flo2®.

F11-INPUT UNDERCURRENT RESTART TIME(UC TIME): Factory preset at 1 minute.
Input undercurrent restart time is adjustable from 1-99 minutes. The Redi-Flo VFD can be
set to restart automatically after it has cut out on input under current trip (UC). After a set
period of time (1-99 minutes) the Redi-Flo VFD can be set up to restart automatically or it
can be set not to restart until manually reset. If (F11) is set at zero then there is no

automatic restart. To adjust restart time follow the steps on the flowchart on page 14.
F12-SWITCHING FREQUENCY(MODULATION): Factory preset at 1(7.8 kHz). Switching

frequency is adjustable from 0 (15.6 kHz), 1 (7.8 kHz) or 2 (3.9 kHz). To adjust switching
frequency follow the steps on the flowchart on page 14.

F13-INPUT CURRENT ENABLE: Factory preset at 0 (disabled). Input current is
adjustable from 0 (disabled, 23 A) or 1 (enabled, 16A). To adjust, input current follow the
steps on the flowchart on page 14.

F14-AUTO REFERENCE SIGNAL: Factory preset at 0 (disabled). Auto Reference Signal
is adjustable from 0 or 1 enabled. To adjust Auto Reference Signal follow the steps on
page 14.

F15-NO MOTOR LOAD(UC1): Factory preset at 1 (enabled). No motor load is adjustable
from 0 (disabled) or 1 (enabled). To adjust No Motor Load follow steps on Page 14.

Page 12

PARAMETER LIST FOR REDI-FLO VFD

Disabled

(Disabled)

OPERATOR ADJUSTMENTS

CAUTION

The internals of the Redi-Flo VFD contain

High Voltages! Extreme caution should be

exercised when making adjustments.

Note: Shaded functions can be changed during operation.

NO. DESCRIPTION RANGE UNITS DEFAULT

F00 RF2 Max. Output Frequency 100.0-400.0 Hz 1.0 Hz 400.0 Hz
F01 RF2 Min. Output Frequency 0.0-100.0 Hz 1.0 Hz 25.0 Hz
F02 RF4 Max. Output Frequency 30.0-100.0 Hz 1.0 Hz 100.0 Hz
F03 RF4 Min. Output Frequency 0.0-30.0 Hz 1.0 Hz 25.0 Hz
F04 Acceleration Time (to 100/400 Hz) 0.5-10.0 Sec. 0.5 Sec. 5.0 Sec.
F05 Deceleration Time (from 100/400 Hz) 0.5-10.0 Sec. 0.5 Sec. 5.0 Sec.
F06 Torque Boost (in % max.) 0-30% 1% 0%
F07 Base Frequency Select 50 or 60 Hz Hz 60 Hz
F08 Motor Overload Level Im depends uponRF2/RF4 50-110% Im % Im 110%
F09 Input Undercurrent Detection Disable 0

F10 Input Undercurrent Detection Level 10-60%(1.6-9.6A) %Im 30%
F11 Input Undercurrent Restart Time 1-99 mins. 1 min. 1 min.
F12 Switching Frequency 0-2 - 1 (7.8kHz)

F13 Input Current Enabled 0-1 - 0

F14 Auto Reference Signal 0-1 - 0

F15 No Motor Load 0-1 - 1

0=

1= Enabled

0= 1 5.6 k Hz

1= 7.8 kHz
2= 3.9 kHz

0= Disabled (23A) (Disabled)

1= Enabled (16A) 23A

0= Disabled (Disabled)

1= Enabled

0= Disabled (Enabled)

1= Enabled

0-1

To Adjust Operator Adjustable Control Features, follow the following
instructions: (See Figure 8)

1. Disconnect Redi-Flo VFD from the power supply.

2. Remove front cover of VFD by losen the two phillips head screws.

3. Lift and set aside the cover to expose the mode keys in the center of the drive.
Use caution to avoid damage to the ribbon cable attaching the front cover to the
interior of the drive.

4. Setting aside the front cover place in a position so the LED display is visible.

5. Connect drive to the power supply.

6. Use the following flow chart to adjust operator adjustable control features.

Page 13

OPERATOR ADJUSTABLE CONTROL FEATURES

Figure 8

Use flowchart below to change operator adjustable control features.

Phillips screws

Page 14

REDI-FLO VFD ELECTRICAL INPUT/OUTPUT

Input Power Terminals

The Input voltage can be changed between 115V and 230V by changing the line input
connections as shown in Figure 9 below.

CAUTION !

WARNING- If the Redi-Flo VFD is miswired for the incoming voltage internal
damage may occur to the drive!

This drive contains possibly lethal AC voltage when AC power is connected. Switching
the Redi-Flo variable frequency drive switch to STOP does not remove AC line voltage.
All input phases must be disconnected before it is safe to touch motor terminals or
control equipment parts. Lethal voltage may be present up to 2 minutes after
disconnecting from power source. To change Input/Output line connections, first make
sure that input power is turned off and Redi-Flo VFD is disconnected. Then remove the
Redi-Flo VFD cover and wire for 115V or 230V.

L1

White

Figure 9:

115V

L2

L3

Black

GND

Green

(Ground)

L1

White

L2

Black

230V

L3

GND

Green

(Ground)

Output Power Terminals

Redi-Flo VFD output terminals are to be terminated into the Harting connector per Figure
10 below:

Figure 10:

Drive Terminals

Page 15

UV

Red

1

2

Harting Terminals

White

W

Black

34

G

Green

REDI-FLO VFD AUXILIARY INPUT/OUTPUT

To access output terminals refer to page 13 steps 1-2

Figure 11: Diagram of input and output terminals

located on top circuit board (behind cover)

• 24VDC: 100mA power supply to power external process loop. To connect to this
supply, connect to terminals 1 and 2 as labeled in Figure 11.

• 0 - 10V External speed (frequency) reference: To connect a 0-10V (0-1 mA)
external speed reference device, (Yokogawa Model # 251-320-MTMT or equivalent),
connect to terminals 4 and 9 as labeled in Figure 11.

• 4 - 20 mA Input signal: Can be used to control the Redi-Flo VFD. To set the
Redi-Flo VFD to follow a 4-20 mA input signal from a control device, connect to
terminals 5 and 6 as shown in Figure 11. The mode selection knob must also be turned
to the appropriate automatic mode, RF2A or RF4A depending on the pump being used.
A jumper is required between terminals 8 and 11, and enable Operator Adjustable
Control feature Auto Reference signal(F14) see Page 12-14.

• RST Auxiliary fault reset (reset): An auxiliary fault reset momentary contact between
terminals 7 and 11 as labeled in Figure 11.

• AUTO RUN Automatic run permissive: A jumper must be placed between
terminal 8 and 11 as labeled in Figure11, for automatic 4 - 20 mA speed reference signal
following capability. A jumper between terminals 8 and 11 does not affect manual
operation.

• DR DIS Drive enable/disable terminal: A switching device can be added to this
normally closed (jumpered) terminal giving an external enable/disable option. When
these terminals are opened during operation the unit coasts to a stop. The unit
ramps up when terminals are closed. This jumper is wired from terminal 1 to
terminal 10, as labeled in Figure 11.

• FWD/REV Pump rotation: Direction can be reversed externally by connecting a
switching device or jumper to terminals 11 and 12 as labeled in Figure 11. Open is
normal rotation and closed is reverse rotation.

• Run/Fault Signal outputs: Contact ratings, 2A @ 250V/30VDC

– K1-Redi-Flo VFD Speed Reached Output: Normally open contact between

terminals 14-15, to close when Redi-Flo VFD is in run mode and speed dial set
frequency is reached.

– K2-Redi-Flo VFD No Fault/Fault Output: Normally open and normally closed

contacts terminals 17-18. Relay to energize upon application of power. The N.O.
and N.C. contacts will change state when fault occurs.

– K3-Redi-Flo VFD Run Acknowledge Output: Normally open contact terminals 19-

20 to close when Redi-Flo VFD is in run mode and there is output current.

Page 16

TROUBLESHOOTING

The Redi-Flo VFD can indicate the presence of a pending fault by the use of status lights
on the digital readout display see Figure 13 below.

Figure 13

Status Lights

Status 1

• Flashing: Input Current limit has been reached. Even if speed dial is turned to
increase speed, the speed is locked and will not rise.

Status 2

• Flashing: Motor Overload fault is pending. Motor current has exceeded maximum
allowed current (5.5A-RF2 & 7.5A-RF4) and Redi-Flo VFD will trip on an overload
(OL1) fault in 60 seconds if speed is not turned down (load reduced).

Status 3

• Flashing: Undercurrent fault is pending. If the speed is not turned down within 8
seconds, the Redi-Flo VFD will trip on an under current (UC) fault.

• Solid: Under current trip/fault is disabled.

Page 17

TROUBLESHOOTING

Redi-Flo Variable Frequency Drive

The Redi-Flo VFD will display an fault if any major fault occurs.

If the display

shows this:

The

Fault is:

Over temperature •The VFD is overloaded •Reduce the load by reducing the frequency

Under voltage •Input voltage too low • Reset the VFD, if it cuts out again, check

Over voltage •Input voltage too high • Reset the VFD, if it cuts out again check

Motor overload • Motor drawing • Check pump for blockage or excess wear,

VFD overload • The VFD is overloaded • Reduce the load by reducing the frequency

Ground fault • Motor is grounded •Check motor and lead with megohmmeter

VFD disabled •Remote connection • Check external device operation

Over current • Motor or motor lead •Reduce the frequency

Under current •Pump running dry or •Check water level, drawdown,

Which may be

caused by:

•The VFD is thermally •Check that the VFD's max. amb. temp. is
overloaded not exceeded and it has proper ventilation

• Defective VFD • Have VFD checked by Grundfos

technician

•Input wire run too long voltage at VFD and power source to

•Input wire size too determine where voltage loss has occurred
small and increase voltage as needed

• DC bus is charging •Check input 120,230 voltage wiring

termination

• Check input voltage
voltage at power source and reduce

voltage as needed

high amps repair or replace as needed
(5.5A-RF2/7.5A-RF4) • Check F08 operators adjustments on pg.13

•Locked rotor

•Defective motor

• Defective VFD •Have VFD checked by Grundfos technician

• Cable is damaged and repair or replace as needed. The

•Transistor shorted insulation resistance must be greater than

1.5 M *

• Have VFD checked by Grundfos technician

contact open •Check Jumper

• Jumper between
terminals 1-10
removed

defective/damaged •Check motor and lead with megohmmeter

• VFD amp draw above and repair or replace as needed. The
16A insulation resistance must be greater than

•Defective motor 1.5 M *

• Defective VFD • Check pump for locked rotor condition

• Have VFD checked by Grundfos technician

shut off or at pump off pumping level and above ground pressure

for these conditions

• Check pump for proper rotation

•Motor current below •Let motor cool and try to restart
UC (F10)setting

Remedy:

Restart delay •Under current restart is • Pump will automatically restart after preset

No Motor Load • Motor is not connected • Check ambient fluid temperature

*Do not use megohmmeter at Redi-Flo VFD output terminals.

pending delay

• Set "0" on F11 to eliminate auto
restart

•Motor thermal is open • Reduce motor load

• Connect motor to drive

Page 18

MAINTENANCE  REDI-FLO2

®

Dismantling & Reassembling Pump End

The Redi-Flo2® pump can be dismantled and reassembled quickly and easily by referring to
the diagram on page 27 and following these steps:

DISMANTLING

1. Shut the pump off by placing the Redi-Flo VFD RSR switch in the stop position.

2. Disconnect Redi-Flo VFD from power supply or generator.

3. Disconnect the motor lead from the Redi-Flo VFD.

4. Remove the pipe or tubing connected to the pump (OPTIONAL).

5. Remove the Set Screw (position 12 in the diagram on page 27). Grasp the Inlet Screen
(position 1) and slowly but forcefully pull it up over the Pump Housing (position 2).

DO NOT ALLOW THE INLET SCREEN TO SCRAPE

THE INSULATION FROM THE MOTOR LEAD

.

6. Unscrew and remove the Pump Housing (counterclockwise when viewed from the top).
This will expose the impeller assembly (guide vanes, wear rings, etc.), which can now
be removed by hand for extended cleaning or replacement.

REASSEMBLY

To reassemble the Redi-Flo2® pump, refer to the diagram on page 27 and:

1. Make sure the motor lead is not connected to the Redi-Flo VFD.

2. Return the impeller assembly components (guide vanes, wear rings, etc.) to the shaft
in the proper order per impeller assembly diagram.

3. Screw the Pump Housing (position 2) back onto the top of the pump. If all of the impellers
and chambers were replaced correctly, the Pump Housing should screw on easily. Hand

tighten.

4. Slip the Inlet Screen (position 1) back over the Pump Housing. Screw the Set Screw

(position 12) back into the Inlet Screen.

MOTOR LEAD WITH THE RECESSED AREA

IN THE PUMP HOUSING TO AVOID

SCRAPING THE INSULATION FROM THE LEAD.

Page 19

MAKE SURE YOU LINE UP THE

MAINTENANCE  REDI-FLO2

®

Dismantling & Reassembling Motor

If the pump is moved from well to well, it should be thoroughly decontaminated prior to being
installed in the next well. In addition to cleaning the individual components inside and outside,
the water in the pump motor should be replaced using the syringe that came with your pump.
This can be accomplished through the following steps:

1. Shut the pump off by placing the Redi-Flo VFD RSR switch in the stop position.

2. Disconnect Redi-Flo VFD from power supply or generator.

3. Disconnect the motor lead from the Redi-Flo VFD.

4. Remove the discharge tubing and the pump end (follow dismantling procedure
page 19).

5. Turn the pump and motor upside down.

6. Use a flat blade screwdriver
to remove the filling screw
on the bottom of the motor.

7. Remove the three Allen

head set screws at the
bottom of the motor with

2.5 mm Allen wrench.

8. Push gently on the motor
shaft to move bearing
housing out of the stator
housing.

9. Continue to remove bearing
housing and motor shaft
from stator housing.

10. Clean motor shaft with a
brush.

11. Empty the water from the
motor.

12. Clean inside of stator
housing with a brush.

15. Replace bearing housing
and tighten Allen screws.

ml.
50

40

30

20

10

16. Continue to add water
until the level is even with
the bottom edge of the
screw hole.

17. Replace and tighten the
filling screw.

18. Turn the pump over
several times, then
remove the filling screw
again to let any trapped
air escape (if air is left
inside the motor, the life of
the motor will be short­ened). Add more water,
as necessary. Fluid should
overflow when the fill cap
is screwed back on the
motor cavity.

19. Replace and tighten the
filling screw.

13. Replace motor shaft into
stator housing.

14. Refill motor using
contaminant-free deionized

water using the syringe that
came with your Redi-Flo2®
pump.

20. Replace pump end and
piping (see reassembly
page 19).

Page 20

MAINTENANCE  REDI-FLO2

®

Replacing the Motor Lead

To replace the motor lead, refer to the diagram on page 27 and follow these steps:

REMOVING THE OLD MOTOR LEAD

1. Make sure the power is turned OFF, the Redi-Flo VFD is turned OFF, and the motor lead is not
connected to the Redi-Flo VFD.

2. Loosen and remove the Set Screw (position 12) from the Inlet Screen (position 1).

3. Slide the Inlet Screen off the pump. If you plan to use this motor lead again, be careful
not to scrape insulation from it as the Inlet Screen is removed.

4. Loosen and remove the Pump Housing (position 2). Remove the impeller assembly
(impellers, guide vanes, etc.).

5. Refer to the illustration on page 27. Use the special Motor Lead Screwdriver (shown
at right) that came with your new motor lead to loosen and remove the Motor Lead
Screw (position 14) for the ground lead (green/yellow wire).

6. Pull up on the ground lead to remove it. Using a small screwdriver and precision
electronics pliers, pry up and remove the Teflon® Washer (position 15) and Brass
Washers (position 16 ) from inside the enlarged Ground Motor Screw (position 13).
Remove the Ground Motor Screw.

7. Use an allen wrench (2.5 mm) to remove the two Motor Screws (position 19) holding
the Suction Interconnector (position 10) in place. Remove the Suction Interconnec­tor but be very careful to note which of its slots is lined up with which motor lead -­this will be very helpful during reassembly. You may wish to scratch a mark on both
the Suction Interconnector and the motor to aid in matching them up later.

8. Refer to the illustration at the bottom of this page. Use the special Motor Lead Screwdriver to
loosen and remove the remaining Motor Lead Screws (position 14).

9. Pull up on each of the leads to remove them. Make a note which lead comes out of each hole

-- this is a MUST when installing the new motor lead. Using a small screwdriver and precision
electronics pliers, unscrew and remove the Teflon® Washer (position 15) and the Grommet
(position 17).

INSTALLING THE NEW MOTOR LEAD

10. Ensure the motor lead holes are clean and free of
moisture.

11. String the Inlet Screen (position 1) onto the motor lead.

12. String the motor lead components (shown at right) onto
the end of each motor lead wire (except the striped green
ground wire).

13. For each wire, place the Crimped Pin (position 18) down
into the motor lead hole. Press the Grommet (position 17)
and Teflon® Washer (position 15) down around the lead.
Be sure to reconnect the lead wires in their previous
pattern shown at left and described below.

Motor Leads

NOTE: For Tefzel motor lead, use

the following wiring pattern: 1, 2, 3
CW from ground terminal (striped
green).

Top

of

Motor

Page 21

Power Conducting Motor
Leads

Motor Lead Screw
(position 14)

Teflon ® Washer
(position 15)

Grommet
(position 17)

Crimped Pin
(position 18)

Teflon® is a registered trademark of DuPont

MAINTENANCE  REDI-FLO2

14. While pushing the lead down into the motor lead hole, use the special Motor Lead Screwdriver
to tighten the Motor Lead Screw (position 14) into place. Repeat for the other two lead wires.

15. Replace the Suction Interconnector (position 10). Replace the Ground Motor Screw (position

13). Since the ground wire will be attached to this screw, you will want to put it into the hole that
will cause the least amount of twisting to the wire.

16. Replace and tighten the two Motor Screws (position 19)
with an allen wrench.

17. Repeat steps 12-14 for the ground motor lead. Note on
the illustration (at right) that the ground lead uses two
Brass Washers (position 16) instead of a Grommet and
Crimped Pin.

18. Return the impeller assembly to the top of the Suction
Interconnector (position 10). Refer to the diagram on
page 25 for the proper sequence.

19. Screw the Pump Housing (position 2) back onto the
Suction Interconnector.

20. Position the motor lead in the recessed area of the Pump
Housing.

21. Carefully push the Inlet Screen (position 1) over the
Pump Housing and the Suction Interconnector.

Ground Motor Lead

Motor Lead Screw
(position 14)

Teflon ® Washer
(position 15)

Brass Washers
(position 16)

®

BE VERY CAREFUL TO AVOID

SCRAPING THE INSULATION

Ground Motor Screw
(position 13)

FROM THE MOTOR LEAD

AS THE INLET SCREEN IS FITTED.

22. Line up the screw hole in the Inlet Screen with the screw
hole in the Pump Housing. Fit and tighten the Set Screw
(position 12).

23. Connect the motor lead to theRedi-Flo VFD and test the rotation of the pump.
Submerge the pump in water, start it at its slowest speed and make sure the
pump shaft is turning counterclockwise (when viewed from the top). If the
rotation is incorrect, switching any two power leads (with POWER OFF) will
correct the problem.

24. Reconnect the tubing or pipe.

Top

View

Periodic Motor Inspection

If the pump is operating at a decreased capacity and the impeller assembly components
(impellers, guide vanes, etc.) do not appear to be the cause, the motor should be checked.
A checklist of things to examine includes:

❏❏

❏ Check the fluid level inside the motor (refer to page 20). Replace and refill as necessary.

❏❏
❏❏

❏ Inspect the outside of the motor for cracks, dents, etc.

❏❏
❏❏

❏ Remove the Inlet Screen (position 1), Pump Housing (position 2), and the impeller

❏❏

assembly (guide vanes, wear rings, etc.). Try to spin the motor shaft by hand. It should spin
freely. If it does not, the motor must be replaced.

❏❏

❏ Check the winding and insulation resistance of the motor and lead as described on

❏❏

page 23.

Teflon® is a registered trademark of DuPont

Page 22

MAINTENANCE  REDI-FLO2®

Winding Resistance

OHMMETER

Rx 000

Rx 000

Rx 000

Rx 000

Turn the power off and disconnect the mo-

Rx 000

tor lead from the converter. Using an ohm-

Rx 000

Rx 000

Rx 000

meter, set the scale to R X 1. Zero-adjust
the meter and measure the resistance be­tween any two power conducting leads
(prongs on the motor lead plug).

If the ohm value is too low, the motor may
be shorted. If too high, the motor windings
or the leads may be open.

Lead Length Ohm Value

0 ft ..................... 3.0 - 3.5 W

50 ft ..................... 3.6 - 4.1 W

75 ft ..................... 3.9 - 4.4 W

100 ft ..................... 4.2 - 4.7 W

125 ft ..................... 4.5 - 5.0 W

150 ft ..................... 4.8 - 5.3 W

175 ft ..................... 5.1 - 5.6 W

200 ft ..................... 5.4 - 5.9 W

250 ft ..................... 6.0 - 6.5 W

300 ft ..................... 6.6 - 7.1 W

Insulation Resistance

MEGA OHMMETER

Turn the power off and disconnect the motor lead from the
converter. Use a 500V megohmmeter or megger (1 Meg =
1 M = 1 million). Zero-adjust the meter and measure the
resistance between any power conducting leads (prongs on
the motor lead plug) and ground. If the pump has been
removed from the well, a good way to test this (as shown at
right) is to submerge the motor lead and Redi-Flo2® pump
in a bucket of water. Touch one lead of the megohmmeter to
the pump and one to a motor lead.

If the ohm value is lower than 1.5M W on any lead other than
ground, the motor or lead is defective and must be replaced.

Checking Components For Wear

The pump components should be periodically checked to ensure they are still within their
minimum operating tolerances (illustrated below).

Impeller (position 5)...................... The impellers should show no visible wear.

Guide Vane (position 3)................ The guide vanes should show no visible wear.

Wear Ring (position 4).................. The minimum thickness ("A" in the illustration)

.......................................................should never be less than 1.0 mm.

▲

A

In addition, visually check all components for cracks, corrosion, or wear.

Storage Requirements

The pump should be thoroughly cleaned before storage to ensure no contamination is present.
Both the pump and the converter should be stored in a clean and dry area in the following
temperature range:

Page 23

▲

1°C to +50°C

or

34°F to 120°F

MAINTENANCE  REDI-FLO4

VARIABLE PERFORMANCE PUMPS

Pump & Motor Inspection

There is no periodic maintenance required for Redi-Flo4™ products. Should a problem
develop, the following inspections should be performed:

If the pump is operating at a decreased capacity and the pump end does not appear to be
the cause, the motor should be checked. Remove the pump end from the motor first by
loosening and removing the four
by following the checklist below:

1. Check motor and pump shaft rotation: spin the shaft by hand, it may be tight
at first but should turn smoothly once started. If pump or motor does not turn
freely, replace as necessary.

2. Check the fluid level inside the motor as described below. Replace and refill
as necessary.

a. Turn the motor upside-down and remove the fill screw located in the center

on the bottom.

b. Water should be visible through fill hole, refill by injecting deionized

water as needed.

c. Rotate shaft to work out air pockets.

1

¤2" nuts and pulling the pump end off the motor. Examine

d. Tighten screw firmly taking care not to strip the screw threads.

3. Inspect the outside of motor and lead for cracks, dents, bulges, burns, etc.

4. Check the winding and insulation resistance of the motor and lead as
described below:

Winding Resistance

Turn the power off and disconnect the motor
lead from the Redi-Flo VFD. Using an ohmme­ter, set the scale to R X 1. Zero-adjust the
meter and measure the resistance between
any two power conducting leads (prongs in the
motor lead plug).

If the ohm value is too low, the motor may be
shorted. If too high, the motor windings or the
leads may be open.

Insulation Resistance

Turn the power off and disconnect the motor lead from the
Redi-Flo VFD. Use a 500V megohmmeter or megger (1 Meg
= 1 M = 1 million). Zero-adjust the meter and measure the
resistance between any power conducting lead (prongs in
the motor lead plug) and ground. If the pump has been
removed from the well, a good way to test this (as shown at
right) is to submerge the motor lead and pump in water.
Touch one lead of the megohmmeter to the pump and one
to a motor lead.

Lead Length Ohm Value

0 ft ..................... 2.75 - 3.35 W

50 ft ..................... 2.90 - 3.50 W

100 ft ..................... 3.05 - 3.65 W

150 ft ..................... 3.20 - 3.80 W

200 ft ..................... 3.35 - 3.95 W

250 ft ..................... 3.50 - 4.10 W

300 ft ..................... 3.65 - 4.25 W

350 ft ..................... 3.80 - 4.40 W

400 ft ..................... 3.95 - 4.55 W

450 ft ..................... 4.10 - 4.70 W

500 ft ..................... 4.25 - 4.85 W

550 ft ..................... 4.40 - 5.00 W

600 ft ..................... 4.60 - 5.20 W

If the ohm value is lower than 1.5M W on any lead other than
ground, the motor or lead is defective and must be replaced.

Page 24

MAINTENANCE  REDI-FLO4

VARIABLE PERFORMANCE PUMPS

Replacing the Motor Lead / Motor

Removing the Old Motor Lead

1. Make sure the motor lead is not connected to the Redi-Flo VFD. Remove the
cable guard from the pump end. Remove the pump end from the motor by
loosening and removing the four
pump end off the motor.

2. Remove the two motor lead plug screws from the top of the motor and pull the
motor lead plug from the motor by rocking the plug side to side while pulling.

Installing the New Motor Lead

1. Make sure the motor lead socket in the motor is clean and free of debris and
moisture.

2. Remove the baggie from the new motor lead plug and firmly slide it into
position in the motor lead socket.

3. Tighten the motor lead plug screws evenly from side to side until firmly
bottomed with the motor lead plug, flush with the top of the motor as shown
below. A 0mm to 1mm gap between the center of the motor lead plug and
the top of the motor is acceptable as shown.

1

¤2" nuts from the motor studs and pulling the

Page 25

MAINTENANCE  REDI-FLO4

VARIABLE SPEED PUMPS

Reattaching Pump End to Motor

1. Fit the pump end to the motor making sure the motor lead aligns with the recess
in the pump inlet and the motor studs align with the holes in the bottom of the
pump inlet.

2. The pump should drop right into place flush with the top of the motor. If it does
not, lift the pump end back up and slightly rotate the motor shaft, as the shaft is
most likely not aligned with the pump end shaft coupling and stopping the pump
from dropping into position. In addition gently rocking the pump back and forth
may aid in getting it to drop into position also.

1

3. Put the four
pressure. The nuts should be torqued to 13 ft. lbs.

4. Reattach the cable guard to the pump end.

The pump is now ready for operation.

¤2" nuts in place and tighten them diagonally to assure even

Page 26

ASSEMBLY DIAGRAM  REDI-FLO2

Pump Components

Pos. Part No. Used Part
No. Description Per Pump Number

1 Inlet Screen 1 1A0004
2 Pump Housing 1/2" NPT 1 1A0044
3 Guide Vane 2 see Service Kits
4 Wear Ring 2 "
5 Impeller 2 "
6 Spacer Ring 2 "
7 Wear Plate 2 "
8 Motor Lead Assembly 4 see Pos. 13 - 18
9 Shaft 1 not available *
10 Suction Interconnector 1 1A5004
11 Stator Housing 1 not available *
12 Set Screw 1 see Service Kits
13 Ground Motor Screw 1 "
14 Motor Lead Screw 4 "
15 Teflon® Washer 4 "
16 Brass Washer 2 "
17 Grommet 3 "
18 Crimped Pin 3 "
19 Motor Screw (long) 2 "
20 Motor Screw (short) 6 "
21 Filling Screw w/ O-Ring 1 "
22 Motor Thrust Washers 2 "
23 Lip Seal 1 ID5566
24 Bearing Housing O-Ring 2 see Service Kits

Teflon® is a registered trademark of Du Pont
*Not economical to replace. Must purchase complete pump/motor

®

2
3
4
5
6
7

Impeller

Assembly

3
4
5
6
7
1

22

MOTOR LEAD ASSEMBLY (position 8)

Ground

Motor

Lead (1)

14
Motor Lead Screw

15
Teflon® Washer

16
Brass Washers

13
Ground Motor Screw

Conducting Motor

14
Motor Lead Screw

15
Teflon ® Washer

17
Grommet

18
Crimped Pin

10

Power

Leads (3)

19

24

12

10

19
11

9

8

23

22

20

21

Page 27

REDI-FLO2® PARTS LIST

Redi-Flo2

®

Service Kits, Tools, and Motor Leads

Replacement parts, service tools, and motor leads are available using the following
part numbers:

Service Kits

Position No. Part Number

In Diagram Part Description No. In Kit

3 Guide Vane ................................... 2

4 Wear Ring ..................................... 2

5 Impeller .......................................... 2

6 Spacer Ring ................................... 2

7 Wear Plate ..................................... 2

4 Wear Ring ..................................... 4

7 Wear Plate ..................................... 4

13 Ground Motor Screw..................... 1

14 Motor Lead Screw......................... 4

15 Teflon

16 Brass Washer ................................ 2

17 Grommet ....................................... 3

18 Crimped Pin ................................... 3

5 Impeller .......................................... 2 1A00018

12 Set Screws ................................... 25 1A00038

14 Motor Lead Screws ...................... 12 1A00048

` 15 Teflon

16 Brass Washer ............................... 25 1A00068

17 Grommet ...................................... 25 1A00078

18 Crimped Pin .................................. 50 1A00088

19 Motor Screw (long)....................... 25 1A00098

20 Motor Screw (short) ..................... 25 1A00108

21 Filling Screw with O-Ring.............. 5 1A00118

22 Motor Thrust Washers .................. 4 1A00128

24 Bearing Housing O-Ring ........... 10 1A5117

® Washer ............................. 4

® Washer ............................ 25 1A00058

125061

1A5050

1A00028

Teflon® is a registered trademark of DuPont

Special Motor Lead Screwdriver SV0370
Syringe (to refill motor) ID6066

Crimping Tool Kit
(Required to crimp,
"crimped pin").

Motor Leads Part Number

All motor leads come with a

VFD Plug attached and a special

Motor Lead Screwdriver

Service Tools Part Number

30

40

50

ml.

8

7

6

5

4

3

2

1

10

20

1A00141

30 foot length 1A 5100
50 " " 1A 5101

75 " " 1A 5102
100 " " 1A 5103
125 " " 1A 5104
150 " " 1A 5105
175 " " 1A 5106
200 " " 1A 5107
250 " " 1A 5108
300 " " 1A 5109

Page 28

PARTS/ACCESSORY LIST ACCESSORY LIST

Redi-Flo VFD

DESCRIPTION PART NUMBER

SI/MP1, 115/230V, VFD, Complete 96022675

115V Power Cord ID8618

MOV Replacement Pack 1A032Z

Redi-Flo4 Variable Performance

Replacement Pump Ends & Motor

DESCRIPTION PART NUMBER

5E8 PE 08030008
10E5 PE 09030005
16E4 PE 10030004
25E3 PE 05030003
2 HP - 3 PH - 230V MS402E 96022532

Redi-Flo VFD x RF4

Variable Performance Pump Accessories

DESCRIPTION PART NUMBER

Splice Kit for RF4 VFD Receptacle 96022677

RF4 x VFD Adapter Cord, 6 Ft.* 96022657
RF4 x VFD Adapter Cord, 12 Ft.* 96022658
RF4 x VFD Adapter Cord, 20 Ft.* 96022659

* You must have one adapter cord to operate Redi-Flo4™ variable speed pumps.

Page 29

General Redi-Flo2® & 4 Accessories

DESCRIPTION PART NUMBER

Redi-Flo2® (MP1) Well Seal

2" SCH 5-20 Well Seal 1A016Z
2" SCH 40-80 Well Seal 1A5111
4" SCH 5-20 Well Seal 1A017Z
4" SCH 40-80 Well Seal 1A5110

Redi-Flo2® Safety Cable Bracket

(Placed between the top of the pump and discharge piping connector) 1A0019

Redi-Flo2® Cooling Shroud 1A004Z
Redi-Flo2® Stainless Steel Ball Check Valve

1

¤2" Male NPT x 1¤2" Female NPT 1A009Z

*For use with

1

¤2" ID or greater tubing or pipe.

Page 30

NOTES

NOTES

NOTES

NOTES