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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 H
2
S>1 ppm CL->500 ppm TDS>1000 ppm
Teflon® is a registered trademark of DuPont
INSTALLATION AND OPERATION FOR THE
REDI-FLO VFD SYSTEM
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.
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.
Figure 7
SI/MP1
Front
Panel
TR'sVFDIO.p65
5/31/00, 9:02 AM
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