Pump Reassembly; Restart Instructions; Priming The Pump - Pentair WHISPERFLO Series Installation And User Manual

DO NOT run the pump dry. If the pump is run dry, the mechanical seal will be damaged and the pump will start leaking. If this
occurs, the damaged seal must be replaced. ALWAYS maintain proper water level. If the water level falls below the suction port,
the pump will draw air through the suction port, losing the prime and causing the pump to run dry, resulting in a damaged seal.
Continued operation in this manner could cause a loss of pressure, resulting in damage to the pump case, impeller and seal and may cause property
damage and personal injury.

Pump Reassembly

1. When installing the replacement shaft seal, use
silicone sealant on the metal portion before
pressing into the seal plate, being careful to keep
off of the seal face. Ensure the seal is fully seated
and allow 24 hours for sealant to cure. (Complete
seal plate w/seal replacement kit available, P/N
350201/350101.)
2. Before installing the ceramic section of the seal into
the impeller, be sure the impeller is clean. Use a
light density soap and water to seal the seal. Press
the seal into the impeller with your thumbs and wipe
off the ceramic and carbon faces with a clean cloth.
3. Remount the seal plate to the motor by installing
bolts in an X pattern and tightening to 70 in-lbs.
4. Clean the motor shaft thread and the impeller
insert, then screw the impeller onto the motor shaft.
5. Screw in the impeller lock screw (counter-clockwise
and tighten to 25 in-lbs. while holding the motor
shaft with wrench).
6. Remount the diffuser onto the seal plate. Make
sure the plastic pins and holding screw inserts are
aligned.
7. Grease the diffuser O-ring and seal plate gasket.
8. Grease the bolt threads, assemble the motor sub-
assembly to the strainer pot-pump body by using
the two through bolts for proper alignment. Do not
tighten the through bolts until all 6 bolts are in place
and finger tightened. Torque in a cross pattern to
110 in-lbs.
9. Fill the pump with water.
10. Reinstall the pump lid and plastic clamp;
see the next section, 'Restart Instructions'.
11. Reprime the system.

Restart Instructions

If pump is installed below the water level of the pool,
close return and suction lines prior to opening hair and
lint pot on pump. Make sure to re-open valves prior to
operating.

Priming the Pump

The pump strainer pot must be filled with water before
the pump is initially started. Follow these steps to
prime the pump:
1. Remove the pump lid plastic clamp. Remove the
pump lid.
2. Fill the pump strainer pot with water.
3. Reassemble the pump cover and plastic clamp
onto the strainer pot. The pump is now ready to
prime.
4. Open the air release valve on the filter, and stand
clear of the filter.
5. Turn on the switch or time clock.
6. When water comes out of the air release valve,
close the valve. The system should now be free of
air and recirculating water to and from the pool.
7. For 2-speed pumps:
•
Pump should run on high-speed for priming.
•
The pump should not run longer than 8
minutes before priming is achieved.
SEAL PLATE
GASKET
IMPELLER
LOCKSREW SEAL
LOCKSCREW
Motor Assembly
WHISPERFLO High Performance Pump Installation and User's Guide
®
5
BOLT
MOTOR SHAFT