Disassembly; Reassembly - Pentair STA-RITE INTELLIFLO3 VSF Installation And Maintenance Manual

16

Disassembly

TOOLS REQUIRED:
• Socket Wrench and 9/16" Socket
• 1/4-inch Hex-head Wrench
• No. 2 Phillips-head Screwdriver
TO DISASSEMBLE THE PUMP:
1. Press ON/STOP to stop the pump and
disconnect all power to the pump at the circuit
breaker.
2. Close all valves in suction and return lines.
3. Relieve all system pressure using the filter air
relief valve.
4. Remove both Drain Plugs from the Strainer Pot and
drain the pump.
5. Using a 9/16" wrench, remove the six or eight
Strainer Pot Bolts securing the Strainer Pot to the
Motor/Hydraulic Assembly.
6. Gently separate the Motor/Hydraulic Assembly from
the Strainer Pot.
7. Remove the two or three Phillips-head Diffuser
Screws. Remove the Diffuser from the Motor/
Hydraulic assembly.
8. At the rear of the motor, insert a 1/4" hex-head driver
into the hole in the middle of the motor fan cover.
9. While holding the motor shaft in place with the 1/4"
driver, remove the Impeller by rotating it counter-
clockwise.
10. Loosen the two captive Phillips-head Wiring Cover
Screws. Remove the Wiring Cover from the drive.
11. Disconnect main power wiring from the drive.
Note: If the optional Relay Control Board (P/N
356365z) is installed, remove the automation
terminal blocks from relay board and disconnect
any relay connections.
12. Remove the four Phillips-head Drive Cover
Screws. Remove the Drive Cover from the drive.
13. Remove the four Phillips-head Drive-to-Motor
Screws.
14. Gently separate the drive from the motor and
place it aside.
15. Disconnect the bonding wire from the bonding lug.
16. Remove two Phillips-head Shroud Screws on each
side of the motor and remove both halves of the
Motor Shroud from the motor.
17. Using a 9/16" wrench, remove the four Motor Bolts
securing the Seal Plate to the motor.
18. Remove the Spring Seal from the motor shaft and
place it aside.
19. If replacing the Shaft Seal, place the Seal Plate
face down and tap out the white Ceramic Seal.
INTELLIFLO3™ VSF / INTELLIPRO3™ VSF Variable Speed and Flow Pump Installation and Maintenance Guide

Reassembly

1. If installing a new Shaft Seal:
Scratching, marring or otherwise damaging the polished
shaft seal faces will cause the seal to leak. Always
handle the shaft seal faces with care and clean them thoroughly before
reassembling the pump.
a. Clean the seal plate's seal cavity and the
motor shaft using mild detergent and water.
b. Lubricate the black rubber portion of the
ceramic seal with water.
c. With the white ceramic face outwards, press
the seal into the seal plate with your thumbs.
2. Reinstall the seal plate onto the motor.
3. Reinstall both halves of the Motor Shroud onto the
motor.
4. Using a clean cloth, remove any debris from the
face of the Ceramic Seal.
5. With the flat metal face outwards, place the Spring
Seal onto the motor shaft. The carbon face should
seat against the Ceramic Seal.
6. While holding the motor shaft in place with a 1/4"
driver, reinstall the impeller onto the motor shaft.
7. Reinstall the Diffuser onto the Seal Plate.
8. Ensure the gasket is properly seated onto the
drive connector and reinstall the drive onto the
motor.
9. Reconnect the main power and bonding lines to the
pump.
Note: If the optional Relay Control Board (P/N
356365z) is used, reinstall the automation
terminal blocks onto the relay board and
reconnect any relay connections.
10. Reinstall the Drive Cover onto the drive.
11. Reinstall the Wiring Cover onto the drive.
12. Ensure the Diffuser and Seal Plate O-rings are
clean and seated properly.
13. Reinstall the hydraulic assembly to the Strainer
Pot, tightening the bolts in a criss-cross pattern.
14. Reinstall the drain plugs into the strainer pot.
15. Reprime the pump according to Priming the Pump,
page 5.