MAINTENANCE REDI-FLO2
®
MAINTENANCE REDI-FLO2
®
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
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 Interconnec-
tor 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.
Page 21
Top
of
Motor
NOTE: For Tefzel motor lead, use
the following wiring pattern: 1, 2, 3
CW from ground terminal (striped
green).
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.
BE VERY CAREFUL TO AVOID
SCRAPING THE INSULATION
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.
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.
Ground Motor Lead
Motor Lead Screw
(position 14)
Teflon ® Washer
(position 15)
Brass Washers
(position 16)
Ground Motor Screw
(position 13)
Top
View
Teflon® is a registered trademark of DuPont
Page 22
Motor Leads
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