Motor And Drive Care; Pump Disassembly; Tools Required - Pentair WHISPERFLOXF VS Installations- Und Benutzerhandbuch

Always disconnect power to the pump at the circuit breaker and disconnect the digital input cable before servicing the pump. Failure to do so could
result in death or serious injury to service people, users or others due to electric shock. Read all servicing instructions before working on the pump.
DO NOT open the strainer pot if pump fails to prime or if pump has been operating without water in the strainer pot. Pumps operated in
these circumstances may experience a build up of vapor pressure and may contain scalding hot water. Opening the pump may cause
serious personal injury. In order to avoid the possibility of personal injury, make sure the suction and discharge valves are open and strainer pot temperature is
cool to touch, then open with extreme caution.
Be sure not to scratch or mar the polished shaft seal faces; seal will leak if faces are damaged. The polished and lapped faces of the
seal could be damaged if not handled with care.

Motor and Drive Care

Protect from heat
1. Shade the motor from the sun.
2. Any enclosure must be well ventilated to prevent
overheating.
3. Provide ample cross ventilation.
Protect against dirt
1. Protect from any foreign matter.
2. Do not store (or spill) chemicals on or near the
motor.
3. Avoid sweeping or stirring up dust near the
motor while it is operating.
4. If a motor has been damaged by dirt it may void
the motor warranty.
5. Clean the lid, O-Ring, and sealing surface of the
strainer pot regularly.
Protect against moisture
1. Protect from splashing or sprayed water.
2. Protect from extreme weather.
3. If motor internals have become wet - let them
dry before operating. Do not allow the pump to
operate if it has been flooded.
4. If a motor has been damaged by water it may
void the motor warranty.

Pump Disassembly

TOOLS REQUIRED:

• 3/8-inch socket wrench
• 9/16-inch open-end wrench
• 9/64-inch hex key wrench
• 1/4-inch hex key wrench
• T20 star-head driver
TO DISASSEMBLE THE PUMP:
1. Press Start/Stop to stop the pump and
disconnect all power to the pump at the circuit
breaker.
2. Disconnect any digital inputs or communication
cables from the pump (if connected).
3. Close all valves in suction and discharge pipes
and relieve all pressure from the system.
4. Remove both drain plugs from the bottom of the
strainer pot.
WHISPERFLO
Pump Disassembly
5. Remove the four (4) star-head drive cover screws from
the top of the drive cover. Wait five minutes after
disconnecting the power before removing the drive
cover.
6. Disconnect the keypad from the drive and set it aside
7. Carefully disconnect the four (4) white motor connectors.
8. Remove the four (4) star-head screws securing the drive
to the motor. Two screws are located under the drive and
two are located inside the drive.
9. Lift the drive upwards and separate it from the motor.
10. Using a 9/16-inch open end wrench remove the six (6)
nuts and washers securing the strainer pot to the motor
assembly.
11. Gently pull the two pump halves apart.
12. Using a 9/64-inch hex key wrench, remove the three (3)
screws securing the diffuser to the seal plate.
13. Hold the impeller in place by hand. Using a 3/8-inch
socket wrench, remove the impeller screw and washer.
14. Using a 1/4-inch hex key wrench, hold the motor shaft in
place at the back of the motor. Turn the impeller counter-
clockwise and remove it from the shaft.
15. Using a 9/16-inch wrench, remove the four (4) motor
nuts and washers securing the seal plate to the motor.
16. If replacing the shaft seal, continue to Shaft Seal
Replacement on the next page.
Otherwise, continue to Pump Reassembly when
necessary.
XF XF
® ®
VS and MAX-E-PRO VS Commercial Variable Speed Pump Installation and User' s Guide
(cont.)
Note: Take note of which terminal each connector is
paired with. Each connector must be reconnected to
the same terminal when reassembling.
Note: The screw is a left-handed thread and loosens
in a clockwise direction.
Note: If the impeller screw has a plastic head a 3/4-
inch socket is required. This screw will also include an
O-ring instead of a washer.
The impeller may have sharp edges that could potentially
cut or scratch the user's hands. Safety gloves are
recommended when holding the impeller during disassembly and reassembly.
17