Pentair WHISPERFLOXF, MAX-E-PROXF User Manual

WHISPERFLOXF® AND MAX-E-PROXF

COMMERCIAL 3-PHASE PUMP

®

INSTALLATION AND

USER’S GUIDE

IMPORTANT SAFETY INSTRUCTIONS

READ AND FOLLOW ALL INSTRUCTIONS

SAVE THESE INSTRUCTIONS

i

F

IMPORTANT PUMP WARNING AND SAFETY INSTRUCTIONS

IMPORTANT NOTICE

This guide provides installation and operation instructions for this pump.
Consult Pentair with any questions regarding this equipment.

Attention Installer: This guide contains important information about the
installation, operation and safe use of this product. This information should
be given to the owner and/or operator of this equipment after installation or
left on or near the pump.

Attention User: This manual contains important information that will help you
in operating and maintaining this product. Please retain it for future reference.

READ AND FOLLOW ALL INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This is the safety alert symbol. When you see this
symbol on your system or in this manual, look for
one of the following signal words and be alert to the
potential for personal injury.

Warns about hazards that can cause death, serious
personal injury, or major property damage if ignored.

Warns about hazards that may cause death, serious
personal injury, or major property damage if ignored.

Warns about hazards that may or can cause minor
personal injury or property damage if ignored.

NOTE Indicates special instructions not related to
hazards.

Carefully read and follow all safety instructions in this manual and on
equipment. Keep safety labels in good condition; replace if missing or
damaged.

When installing and using this electrical equipment, basic safety
precautions should always be followed, include the following:

FAILURE TO FOLLOW ALL INSTRUCTIONS AND
WARNINGS CAN RESULT IN SERIOUS BODILY

INJURY OR DEATH. THIS PUMP SHOULD BE INSTALLED AND SERVICED

ONLY BY A QUALIFIED POOL SERVICE PROFESSIONAL. INSTALLERS,
POOL OPERATORS AND OWNERS MUST READ THESE WARNINGS AND
ALL INSTRUCTIONS IN THE OWNER’S MANUAL BEFORE USING THIS
PUMP. THESE WARNINGS AND THE OWNER’S MANUAL MUST BE LEFT
WITH THE POOL OWNER.

Do not permit children to use this product.

RISK OF ELECTRICAL SHOCK (For all permanently

installed units intended for use on 15 or 20 ampere,
125 through 240 volt, single phase branch circuits). Connect only to a branch
circuit protected by a ground-fault circuit-interrupter (GFCI). Contact a
qualified electrician if you cannot verify that the circuit is protected by a GFCI.

This unit must be connected only to a supply circuit that is protected by a
ground-fault circuit-interrupter (GFCI). Such a GFCI should be provided by
the installer and should be tested on a routine basis. To test the GFCI, push
the test button. The GFCI should interrupt power. Push the reset button.
Power should be restored. If the GFCI fails to operate in this manner, the
GFCI is defective. If the GFCI interrupts power to the pump without the test
button being pushed, a ground current is flowing, indicating the possibility of
an electric shock. Do not use this pump. Disconnect the pump and have the
problem corrected by a qualified service representative before using.

This pump is for use with permanent swimming pools

and may also be used with hot tubs and spas if so
marked. Do not use with storable pools. A permanently-installed pool is
constructed in or on the ground or in a building such that it cannot be readily
disassembled for storage. A storable pool is constructed so that it is capable
of being readily disassembled for storage and reassembled to its original
integrity.

General Warnings

• Never open the inside of the drive motor enclosure. There is a capacitor
bank that holds a 230 VAC charge even when there is no power to the
unit.

• The pump is not submersible.

• The pump is capable of high flow rates; use caution when installing and
programming to limit pumps performance potential with old or questionable
equipment.

• Code requirements for electrical connection differ from country to
country, state to state, as well as local municipalities. Install equipment
in accordance with the National Electrical Code and all applicable local
codes and ordinances.

• Before servicing the pump; switch OFF power to the pump by disconnecting
the main circuit to the pump.

• This appliance is not intended for use by persons (including children) of
reduced physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction
concerning the use of the appliance by a person responsible for their
safety.

SUCTION ENTRAPMENT HAZARD: STAY OFF
THE MAIN DRAIN AND AWAY FROM ALL SUCTION

OUTLETS!

RELEASE SYSTEM (SVRS) PROTECTION AND DOES NOT PROTECT
AGAINST BODY OR LIMB ENTRAPMENTS, DISEMBOWELMENTS (WHEN
A PERSON SITS ON A BROKEN OR UNCOVERED POOL DRAIN) OR HAIR
ENTANGLEMENTS.

THIS PUMP PRODUCES HIGH LEVELS OF SUCTION AND CREATES A
STRONG VACUUM AT THE MAIN DRAIN AT THE BOTTOM OF THE BODY
OF WATER. THIS SUCTION IS SO STRONG THAT IT CAN TRAP ADULTS
OR CHILDREN UNDER WATER IF THEY COME IN CLOSE PROXIMITY TO
A DRAIN OR A LOOSE OR BROKEN DRAIN COVER OR GRATE.

THE USE OF UNAPPROVED COVERS OR ALLOWING USE OF THE POOL
OR SPA WHEN COVERS ARE MISSING, CRACKED OR BROKEN CAN
RESULT IN BODY OR LIMB ENTRAPMENT, HAIR ENTANGLEMENT, BODY
ENTRAPMENT, EVISCERATION AND/OR DEATH.

The suction at a drain or outlet can cause:

Limb Entrapment: When a limb is sucked or inserted into an opening resulting

in a mechanical bind or swelling. This hazard is present when a drain cover
is missing, broken, loose, cracked or not properly secured.

Hair Entanglement: When the hair tangles or knots in the drain cover, trapping
the swimmer underwater. This hazard is present when the flow rating of the
cover is too small for the pump or pumps.

Body Entrapment: When a portion of the body is held against the drain
cover trapping the swimmer underwater. This hazard is present when the
drain cover is missing, broken or the cover flow rating is not high enough for
the pump or pumps.

Evisceration/Disembowelment: When a person sits on an open pool
(particularly a child wading pool) or spa outlet and suction is applied directly
to the intestines, causing severe intestinal damage. This hazard is present
when the drain cover is missing, loose, cracked, or not properly secured.

Mechanical Entrapment: When jewelry, swimsuit, hair decorations, finger,
toe or knuckle is caught in an opening of an outlet or drain cover. This hazard
is present when the drain cover is missing, broken, loose, cracked, or not
properly secured.

NOTE: ALL SUCTION PLUMBING MUST BE INSTALLED IN ACCORDANCE
WITH THE LATEST NATIONAL AND LOCAL CODES, STANDARDS AND
GUIDELINES.

THIS PUMP IS NOT EQUIPPED WITH SAFETY VACUUM

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

IMPORTANT PUMP WARNING AND SAFETY INSTRUCTIONS

ii

TO MINIMIZE THE RISK OF INJURY DUE TO
SUCTION ENTRAPMENT HAZARD:

• A properly installed and secured ANSI/ASME A112.19.8 approved anti­entrapment suction cover must be used for each drain.

• Each suction cover must be installed at least three (3’) feet apart, as
measured from the nearest point to nearest point.

• Regularly inspect all covers for cracks, damage and advanced weathering.

• If a cover becomes loose, cracked, damaged, broken or is missing,
replace with an appropriate certified cover.

• Replace drain covers as necessary. Drain covers deteriorate over time
due to exposure to sunlight and weather.

• Avoid getting hair, limbs or body in close proximity to any suction cover,
pool drain or outlet.

• Disable suction outlets or reconfigure into return inlets.

The pump can produce high levels of suction within

the suction side of the plumbing system. These high
levels of suction can pose a risk if a person comes within the close proximity
of the suction openings. A person can be seriously injured by this high level
of vacuum or may become trapped and drown. It is absolutely critical that the
suction plumbing be installed in accordance with the latest national and local
codes for swimming pools.

A clearly labeled emergency shut-off switch for the pump

must be in an easily accessible, obvious place. Make
sure users know where it is and how to use it in case of emergency.

The Virginia Graeme Baker (VGB) Pool and Spa Safety Act creates
new requirements for owners and operators of commercial swimming
pools and spas.

Commercial pools or spas constructed on or after December 19, 2008,
shall utilize:

(A) A multiple main drain system without isolation capability with suction
outlet covers that meet ASME/ANSI A112.19.8a Suction Fittings for Use in
Swimming Pools, Wading Pools, Spas, and Hot Tubs and either:

(i) A safety vacuum release system (SVRS) meeting ASME/ANSI
A112.19.17 Manufactured Safety Vacuum Release systems (SVRS) for
Residential and Commercial Swimming Pool, Spa, Hot Tub, and Wading
Pool Suction Systems and/or ASTM F2387 Standard Specification for
Manufactured Safety Vacuum Release Systems (SVRS) for Swimming
pools, Spas and Hot Tubs or

(ii) A properly designed and tested suction-limiting vent system or

(iii) An automatic pump shut-off system.

Commercial pools and spas constructed prior to December 19, 2008, with a
single submerged suction outlet shall use a suction outlet cover that meets
ASME/ANSI A112.19.8a and either:

(A) A SVRS meeting ASME/ANSI A112.19.17 and/or ASTM F2387, or

(B) A properly designed and tested suction-limiting vent system, or

(C) An automatic pump shut-off system, or

(D) Disabled submerged outlets, or

(E) Suction outlets shall be reconfigured into return inlets.

HAZARDOUS PRESSURE: STAND CLEAR OF PUMP
AND FILTER DURING START UP.

Circulation systems operate under high pressure. When
any part of the circulating system (i.e. locking ring, pump,
filter, valves, etc.) is serviced, air can enter the system
and become pressurized. Pressurized air can cause the

pump housing cover, filter lid, and valves to violently
separate which can result in severe personal injury or death. Filter tank lid and
strainer cover must be properly secured to prevent violent separation. Stand
clear of all circulation system equipment when turning on or starting up pump.

Before servicing equipment, make note of the filter pressure. Be sure that all
controls are set to ensure the system cannot inadvertently start during service.
Turn off all power to the pump. IMPORTANT: Place filter manual air relief

valve in the open position and wait for all pressure in the system to be
relieved.

Before starting the system, fully open the manual air relief valve and place
all system valves in the “open” position to allow water to flow freely from the
tank and back to the tank. Stand clear of all equipment and start the pump.

IMPORTANT: Do not close filter manual air relief valve until all pressure
has been discharged from the valve and a steady stream of water
appears. Observe filter pressure gauge and be sure it is not higher than the

pre-service condition.

General Installation Information

• All work must be performed by a qualified service professional, and must

conform to all national, state, and local codes.

• Install to provide drainage of compartment for electrical components.

• These instructions contain information for a variety of pump models and

therefore some instructions may not apply to a specific model. All models
are intended for use in swimming pool applications. The pump will function
correctly only if it is properly sized to the specific application and properly
installed.

Pumps improperly sized or installed or used in

applications other than for which the pump was
intended can result in severe personal injury or death. These risks may
include but not be limited to electric shock, fire, flooding, suction entrapment
or severe injury or property damage caused by a structural failure of the
pump or other system component.

Pumps and replacement motors that are single speed and one (1)
Total HP or greater cannot be sold, offered for sale, or installed
in a residential pool for filtration use in California, Title 20 CCR
sections 1601-1609.

For Installation of Electrical Controls at Equipment
Pad (ON/OFF Switches, Timers and Automation
Load Center)

Install all electrical controls at equipment pad, such as
on/off switches, timers, and control systems, etc. to allow
the operation (startup, shut-down, or servicing) of any

pump or filter so the user does not place any portion
of his/her body over or near the pump strainer lid, filter lid or valve closures.
This installation should allow the user enough space to stand clear of the filter
and pump during system start-up, shut down or servicing of the system filter.

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

Warning Page P/N 352558 Rev. B 11/19

iii

CUSTOMER SERVICE / TECHNICAL SUPPORT

If you have questions about ordering Pentair replacement parts, and pool products, please contact:

Customer Service and Technical Support, USA
(8 A.M. to 4:30 P.M. — Eastern/Pacific Times)
Phone: [phone]
Fax: [phone]

Web site

Visit www.pentair.com for more information about
Pentair products.

TABLE OF CONTENTS

Important Pump Warning and

Safety Instructions ................................................

Pump Overview ......................................................

Pump Overview and Features
Union Adapter Installation

Installation ..............................................................

Location
Piping
Fittings and Valves
Electrical Requirements
Electrical Installation

Operation ................................................................

Priming the Pump

Maintenance ...........................................................

Pump Strainer Basket
Cleaning the Pump Strainer Basket
Winterizing
Motor Care
Pump Disassembly
Pump Reassembly
The Mechanical Seal

Sanford, North Carolina (8 A.M. to 4:30 P.M. ET)
Phone: [phone]
Fax: [phone]

Moorpark, California (8 A.M. to 4:30 P.M. PT)
Phone: [phone] (Ext. 5591)
Fax: [phone]

Troubleshooting ....................................................

i

1

1
1

2

2
2
2
2
3

4

4

5

5
5
5
6
6
7
7

Replacement Parts ...............................................

Illustrated Parts List
Motor Table
Hydraulic Parts Table
Pump Dimensions
Pump Performance Curves

8

9

9
10
10
10
11

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

The WhisperFloXF® and Max-E-ProXF® Commercial
3-Phase Pumps feature a heavy duty 56 square flange
motor and highly engineered hydraulics. With capabilities
in excess of 200 gpm, these pumps are an ideal choice
for many residential and commercial applications;
especially those involving water features, negative edges
and slides.

• New hydraulic isolator separates priming water from
pumping water for faster priming, more turbulence­free flow and increased efficiency.

• Upgraded dual-compartment motor for simplified field
wiring.

• Self-priming for quick, easy start-up.

• New union connectors included for connecting directly
to 2.5” or 3” plumbing.

• Diamond seals for increase durability and
performance.

• Integral volute and strainer pot reduce hydraulic noise.

• External port threading and tool-free union nuts need
only hand-tightening.

1

PUMP OVERVIEW

WhisperFloXF 3-Phase Pump (Almond)

Max-E-ProXF 3-Phase Pump (Black)

Drop-in replacement for all WhisperFlo® models.
Simple replacement for Challenger® pumps
(Riser base required for Challenger replacements
P/N 400012 available separately)

Union Adapter Installation

Installing the locking union onto the pump:

1. Glue the PVC union adapter fitting to the PVC pipe.

The adapter accepts 2.5” PVC pipe internally or a 3”
PVC coupling externally.

Note: Be sure that the groove for the retainer ring is

on the end opposite your glue joint.

2. Slip the nut onto the fitting.

3. Place the flat side of the retainer ring against the

adapter on the grooved end.

4. Gently flex the locking clip union nut retainer ring into

its place in the groove on the adapter.

5. Start snapping it in at one end of the ring and work

your way around.

The tab features should point out away from the nut

and the glue joint towards the sealing surface.

6. Slide the nut over the ring and attach it to the pump.

Only install the
retainer ring with the
tab features pointing

away from the nut.

Slip the nut onto the fitting.

Snap retainer ring around the adapter.

Union Nut and Adapter

Slide the nut over the adapter

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

2

INSTALLATION

Only a qualified plumbing professional should install the WhisperFloXF® or Max-E-ProXF® Commercial 3-Phase
Pump. Refer to “Important Pump Warning And Safety Instructions” on pages i - ii for additional installation and safety
information.

Location

Note: Do not install this pump within an outer

enclosure or beneath the skirt of a hot tub or spa
unless marked accordingly.

Note: Ensure that the pump is mechanically secured
to the equipment pad.

Be sure the pump location meets the following
requirements:

1. Install the pump as close to the pool or spa as
possible. To reduce friction loss and improve
efficiency, use short, direct suction and return
piping.

2. Install a minimum of 5 feet (1.5 meters) from
the inside wall of the pool and spa. Canadian
installations require a minimum of 9.8 feet (3
meters) from the inside wall of the pool.

3. Install the pump a minimum of 3 feet (0.9 meters)
from the heater outlet.

4. Do not install the pump more than 10 feet (3.1
meters) above the water level.

5. Install the pump in a well ventilated location
protected from excess moisture (i.e. rain gutter
downspouts, sprinklers, etc.).

6. Install the pump with a rear clearance of at
least 3 inches (7.6 cm) so that the motor can be
removed easily for maintenance and repair.

Piping

1. For improved pool plumbing, it is recommended to
use a larger pipe size.

2. Piping on the suction side of the pump should be the
same or larger than the return line diameter.

3. Plumbing on the suction side of the pump should be
as short as possible.

4. For most installations Pentair recommends installing
a valve on both the pump suction and return lines
so that the pump can be isolated during routine
maintenance. However, we also recommend that a
valve, elbow or tee installed in the suction line should
be no closer to the front of the pump than five (5)
times the suction line diameter.

Example: A 2.5 inch pipe requires a 12.5 inch (31.8
cm) straight run in front of the suction inlet of the
pump. This will help the pump prime faster and last
longer.

Note: DO NOT install 90° elbows directly into the
pump inlet or outlet.

Pump Rear and Vertical Clearance

5 x SUCTION

PIPE DIAMETER

ELBOW

Recommended Piping

Fittings and Valves

1. Do not install 90° elbows directly into pump inlet.

2. Flooded suction systems should have gate valves
installed on suction and discharge pipes for
maintenance, however, the suction gate valve should
be no closer than five times the suction pipe diameter
as described in this section.

3. Use a check valve in the discharge line when
using this pump for any application where there is
significant height to the plumbing after the pump.

4. Be sure to install check valves when plumbing in
parallel with another pump. This helps prevent
reverse rotation of the impeller and motor.

Electrical Requirements

• Install all equipment in accordance with the National

Electrical code and all applicable local codes and
ordinances.

• A means for disconnection must be incorporated in

the fixed wiring in accordance with the wiring rules.

6 IN. (15.2 CM)

MINIMUM

3 IN.

(7.6 CM)

MINIMUM

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

TIGHT

Electrical Installation

RISK OF ELECTRICAL SHOCK OR ELECTROCUTION. This pump must be installed by a licensed or certified electrician or a
qualified service professional in accordance with the National Electrical Code (NEC) and all other applicable national or local codes and
ordinances. Improper installation will create an electrical hazard which could result in death or serious injury to users, installers, or others
due to electrical shock, and may also cause damage to property.

Always disconnect power to the pump at the circuit breaker 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.

3

Wiring

1. Be sure all electrical breakers, switches and
automatic controls are turned off before wiring motor.

STORED CHARGE - Wait at least sixty (60)
seconds before servicing.

2. Become familiar with the wiring diagram, volts,
hertz, amps and phase of your particular pump
motor. All of this information is provided on the motor
nameplate label found on the side of the motor.

3. Be sure that the supply voltage meets the
requirements listed on the motor nameplate. If these
requirements are not met, permanent motor damage
may occur.

4. For wiring sizes and general guidelines for proper
electrical installation, please follow the specifications
defined in the National Electrical Code and all other
applicable national or local codes.

5. 3-Phase motors require external overload protection.
An initial inspection is needed to ensure proper
rotation of the pump.

Once installed, momentarily cycle the power on and

then off. Note the rotation of the motor fan or shaft as
it comes to a stop. If wired correctly the motor shaft
and/or fan will match the rotation arrow noted on the
pump.

6. Use a strain relief and be sure all electrical
connections are clean and tight.

7. Cut the wires to the appropriate length so they do not
overlap or touch when connected.

Grounding

1. Permanently ground the motor using the green
ground screw, as shown below. Use the correct wire
size and type specified by National Electrical Code.
Be sure the ground wire is connected to an electrical
service ground.

2. The pump should be permanently connected to
either a circuit breaker, 2-pole timer or 2-pole relay.

Note: If AC power is supplied by a GFCI circuit

breaker, the pump should be wired on its own
independent circuit unless the pump is operated in

tandem with a Pentair salt chlorine generator.

Bonding

1. Bond the motor to the structure in accordance with
the National Electrical Code and all other applicable
national or local codes. Use a solid copper bonding
conductor not smaller than 8 AWG. For Canadian
installations, a 6 AWG or larger solid copper bonding
conductor is required. Run a wire from the external
bonding screw or lug to the bonding structure.

2. Connect the wire from the accessible bonding lug
on the motor to all metal parts of the swimming
pool, spa, or hot tub structure and to all electrical
equipment, metal conduit, and metal piping within 5
feet (1.5 meters) of the inside walls of the swimming
pool, spa, or hot tub. Run a wire from the external
bonding screw or lug to the bonding structure.

Before establishing or restoring power to the
pump, be sure all electrical connections are tight

and all electrical and wiring compartment covers are properly installed.

Note: When the pump is started and stopped by removing
power with a relay or timer, a two-pole device should be
used to apply and remove power to both POWER LINE
TERMINALS.

Pentair offers GFCI breakers which offer appropriate personal
protection while meeting 2008 to current NEC Standards for
Pool Pumps. See Pentair product catalog for details.

GROUND SCREW

RECEPTACLE
FOR WATER
CONNECTOR
(1/2” NPT)

BONDING
LUG

MOTOR SHAFT
FLATS FOR 1/4”
HEX-KEY WRENCH

Section P/N 350486 Rev. E 10/23/19

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

4

OPERATION

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 in your pool (half way up skimmer
opening). If the water level falls below the skimmer opening, the pump will draw air through the skimmer, 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.

Before turning the pump ON, be sure the following conditions are met:

1. Open filter air relief valve.

2. Open valves.

3. Pool return is completely open and clear of any blockages.

4. Water in the pump basket.

5. Stand clear of the filter or other pressurized vessels.

Priming the Pump

If the pump is installed below the water level of the pool,
close return and suction lines prior to opening the pump
strainer pot. Be sure to reopen valves prior to operating.

Note: Running the pump dry could cause a loss of
pressure, resulting in damage to the pump case, impeller
and seal.

Volute

Lid

Follow the steps below to prime the pump:

1. Ensure all electrical power to the pump is shut off at the
circuit breaker and all pressure has been relieved from
the filtration system.

2. Remove the pump strainer pot lid.

3. Fill the pump strainer pot with water.

4. Reinstall the lid by placing it onto the strainer pot and
tightening clockwise until the lid handles are horizontal.

5. Open the filter air relief valve and stand clear of the
filter.

6. Reestablish electrical power to the pump at the circuit
breaker and start the pump.

7. When a steady stream of water flows from the filter air
relief valve, close the valve. The system should now be
free of air and recirculating water.

8. This pump will prime within 20 minutes. Do not
allow your pump to run longer than this time without
developing full flow. If the pump does not prime, refer to
Troubleshooting on page 8.

9. Two speed pumps should run on high speed for
priming.

Top View

Closed Lid: Handles in
horizontal position

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

MAINTENANCE

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.

To prevent damage to the pump and for proper operation of the system, clean pump strainer basket and skimmer baskets regularly.

5

Pump Strainer Basket

The strainer pot is located at the front of the pump and
houses the pump strainer basket.

The strainer basket can be viewed through the strainer
pot lid and should be visually inspected at least once
a week. Regularly emptying and cleaning the strainer
basket will lead to higher filter and heater efficiency and
prevent unnecessary stress on the pump motor.

Cleaning the Pump Strainer Basket

1. Shut off all electrical power to the pump at the circuit
breaker.

2. Open the filter air relief valve and relieve all pressure
from the filtration system.

3. Turn the strainer pot lid counter-clockwise and
remove from the pump.

4. Remove debris and rinse out the strainer basket.
Replace the basket if it is cracked or damaged.

5. Place the basket back into the strainer pot. Be sure
to align the notch in the bottom of the basket with the
rib in the bottom of the strainer pot.

6. Fill the strainer pot with water up to the inlet port.

7. Clean the lid O-ring and sealing surface of the
strainer pot.

Note: It is important to keep the lid O-ring clean and

well lubricated.

8. Reinstall the lid by placing it onto the strainer pot
and tightening clockwise until the lid handles are
horizontal.

Note: Ensure the lid O-ring is properly placed and is

not being pinched between the lid and strainer pot.

9. Open the filter air relief valve and stand clear of the
filter.

10. Reestablish electrical power to the pump at the
circuit breaker and start the pump.

11. When a steady stream of water flows from the filter
air relief valve, close the valve.

THIS SYSTEM OPERATES UNDER HIGH PRESSURE.
When any part of the circulating system is serviced, air can
enter the system and become pressurized. Pressurized air
can cause the lid to separate from the pump which can result
in serious injury, death, or property damage. To avoid this
potential hazard, follow above instructions.

Winterizing

• In mild climate areas, when temporary freezing
conditions may occur, run your filtering equipment all
night to prevent freezing.

• You are responsible for determining when freezing
conditions may occur. If freezing conditions are
expected, take the following steps to reduce the risk
of freeze damage. Freeze damage is not covered

under warranty.

To prevent freeze damage follow the procedures
listed below:

1. Shut off all electrical power for the pump at the circuit

breaker.

2. Drain water out of the pump by removing the two

drain plugs from the bottom of the strainer pot. Store
the plugs in the strainer basket.

3. Cover the motor to protect it from severe rain, snow

and ice.

Note: Do not wrap motor with plastic or other air tight
materials during winter storage. The motor may be
covered during a storm, winter storage, etc., but never
when operating or expecting operation.

Lid

Strainer Basket

Lid O-ring

Volute

Drain

Plugs

Strainer Pot Assembly

Strainer
Pot

Inlet Port

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

6

Always disconnect power to the pump at the circuit breaker and disconnect the communication 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 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 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 voids the
motor warranty.

5. Clean the lid O-ring and sealing surface of the
strainer pot.

Protect against moisture

1. Protect from splashing or sprayed water.

2. Protect from extreme weather.

3. If the motor has become wet - let it dry before
operating. Do not allow the pump to operate if it has
been flooded.

4. If the motor has been damaged by water it voids 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

• Torque wrench

To disassemble the pump:

1. Ensure all electrical power to the pump is shut off at
the circuit breaker and all pressure has been relieved
from the filtration system.

2. Drain the pump by removing both drain plugs from
the bottom of the strainer pot.

3. Using a 9/16-inch open-end wrench remove the six
(6) nuts and washers securing the strainer pot to the
motor assembly.

4. Gently pull the two pump halves apart.

5. Using a 9/64-inch hex key wrench, remove the three
(3) screws securing the diffuser to the seal plate.

6. Hold the impeller in place by hand. Using a
3/8-inch socket wrench, remove the impeller screw
and washer. 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.

are recommended when holding the impeller during disassembly

and reassembly.

7. 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.

8. Using a 9/16-inch wrench, remove the four (4) motor
nuts and washers securing the seal plate to the
motor.

9. Place the seal plate face down on a flat surface and
press out the ceramic part of the mechanical seal.

10. Clean the seal plate, seal housing and motor shaft.

- ILLUSTRATED PARTS VIEW ON THE NEXT PAGE -

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

The impeller may have sharp edges that could

potentially cut or scratch hands. Safety gloves

Pump Reassembly

1. Install the spring end of the mechanical seal onto
the impeller shaft. Ensure black/carbon face is
facing outward.

2. Secure the seal plate onto the motor using the four
(4) motor nuts and washers.

3. With the white ceramic face facing outward, press
the seal into the seal plate with your thumbs. Wipe off
the ceramic with a clean cloth. Do not lubricate seal
faces.

4. Using a 1/4-inch hex key wrench, hold the motor
shaft in place at the back of the motor. Firmly tighten
the impeller clockwise onto the motor shaft to 40
in-lbs.

The impeller may have sharp edges that could

potentially cut or scratch hands. Safety gloves

are recommended when holding the impeller during disassembly

and reassembly.

5. Ensure the impeller washer is in place on the
impeller screw and firmly tighten the screw counter­clockwise to 78.5 in-lbs.

Note: Some impeller screws include an O-ring

instead of a washer. Before reassembling, inspect
the O-ring for damage and replace if necessary.

6. Secure the diffuser onto the seal plate using the
three (3) diffuser screws. Ensure the plastic pins and
holding screw inserts are aligned. As a reference,
“TOP” is molded onto the top side of the diffuser.

Note: Ensure that the seal plate O-ring is clean and

free of debris. Inspect the O-ring for damage and
replace if necessary.

7. Secure the motor assembly to the strainer pot with
the six (6) seal plate nuts and washers. Each seal
plate nut should be torqued to a maximum of 100 in­lbs. Do not overtighten the nuts.

8. Reinstall both drain plugs into the bottom of the
strainer pot.

9. Refer to page 4, Priming the Pump for instructions on
restarting the pump.

The Mechanical Seal

The mechanical seal consists of two parts, a spring
half and a ceramic/rubber half. The pump requires little
or no service other than reasonable care. However, a
mechanical seal may occasionally become damaged and
must be replaced. Refer to Pump Disassembly and Pump
Reassembly for replacement instructions.

Spring Half:

Carbon face is
facing outward

Mechanical Seal

Ceramic & Rubber
Half: White ceramic

face is facing
outward

7

Motor Nut and

Washer (x4)

Motor Assembly

Seal Plate Nut

and Washers (x6)

Seal Plate

Mechanical Seal

Impeller

Impeller Screw and Washer

Diffuser

Diffuser

O-ring

Illustrated Parts View

Strainer Pot

Seal Plate O-ring

Diffuser
Screw (x3)

Drain Plugs (x2)

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

8

TROUBLESHOOTING

RISK OF ELECTRICAL SHOCK OR ELECTROCUTION.

Improperly installation will create an electrical hazard which could result in death or serious injury to pool users, installers, or others due
to electrical shock, and may also cause damage to property.

1. If you are not familiar with your pool filtering system and/or heater:

a. Do NOT attempt to adjust or service without consulting your dealer, or a qualified pool technician.

b. Read the entire Installation & User’s Guide before attempting to use, service or adjust the pool filtering system or heater.

2. Switch OFF power to the pump before attempting to service or repair.

Problem Corrective Action

Pump will not prime

Check suction piping and any suction gate valves.

Ensure lid O-ring is in place and in good condition.

Ensure the strainer pot lid is properly secured to the strainer pot.

Check water level and ensure skimmer is not drawing air or clogger

Ensure suction lines, pump strainer pot and pump volute are full of
water.

Ensure any valves in the suction line are working and open.

Check water level to ensure skimmer is not drawing air or clogged.

Pump O-ring defective

Reduced capacity and/or head

Air pockets or leaks in suction line
Pump will not prime — too much air

Clogged Impeller or Diffuser

Replace O-ring.

Check suction piping and any suction gate valves.

Ensure lid O-ring is in place and in good condition.

Ensure the strainer pot lid is properly secured to the strainer pot.

Check water level to ensure skimmer is not drawing air or clogged.

Clean pump strainer pot. Refer to page 5, Cleaning the Strainer Basket.

Check to ensure the impeller or diffuser are not clogged. Refer to page
6, Pump Dissasembly.

Disassemble the pump and clear the blockage. Refer to page 6, Pump
Disassembly and page 7, Pump Reassembly for specific instructions.

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

Illustrated Parts List

26

21

20

17

15

14

13

6

4

87

25 24 23

22

1

2

5

3

1011

9

12

16

18

19

9

REPLACEMENT PARTS

Item

No.

Description

WhisperFloXF

Part No.

Max-E-ProXF

Part No.

1 Strainer Pot Assembly 400000 401000

2 Motor Assembly See Motor Table

3 Union Kit 410020

4 Strainer Pot Lid 400006 401006

5 Strainer Basket 400007z

6 Lid O-ring 35505-1440

7 Drain Plug O-ring 192115

8 Drain Plug 071131 357161

9 Union C-Clip 410001

10 Union Adapter 410002

11 Union Nut 411000

12 Diamond Seal Kit (Incl. 2) 410016z

13 Diffuser O-ring 350336

14 Diffuser Screw 353323

15 Diffuser See Hydraulic Parts Table

16 Seal Plate O-ring 351446

17

Impeller Screw, Plastic-Head

(pumps mfg. before 10/7/19)

Impeller Screw, Metal-Head

(pumps mfg. after 10/7/19)

37337-6080

356073

Item

No.

Description

WhisperFloXF

Part No.

18 Impeller Screw Washer 072172

19 Impeller Assembly See Hydraulics Table

20 Mechanical Seal 17351-0101S

21

Seal Plate with Mechanical Seal 400031z 400032z

Seal Plate 400002 401002

22 Flat Washer 072184

23 Lock Washer U43-12SS

24 Acorn Nut 071413

25 Motor Base 400004z 401004z

26 Motor See Motor Table

- Hardware and O-rings Kit 400030z

- Riser Plater, XF to Challenger 400012

(-) Not Shown

Max-E-ProXF

Part No.

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

10

ANCHOR BOLT MOUNTING LOCATIONS

Motor Table

Model

WhisperFloXF Max-E-ProXF WhisperFloXF Max-E-ProXF WhisperFloXF Max-E-ProXF

XFK-8 XPK-8 2 400617z 401617z 354809s 354810s

XFK-12 XPK-12 3 400618z 401618z 354811s 354812s

XFK-20 XPK-20 5 400619z 401619z 354813s 354814s

Note: Pumps, power ends and motors listed in table above are 3-phase 208-230/460V.

Motor

HP

Motor Assembly P/N (Item #2) Motor P/N (Item #26)

Hydraulic Parts Table

Model

WhisperFloXF Max-E-ProXF

XFK-8 XPK-8 2 400010 400020z

XFK-12 XPK-12 3 400010 400015z

XFK-20 XPK-20 5 400011z 400023z

Motor HPDiffuser P/N

(Item #15)

Impeller Assembly P/N

(Item #19)

Pump Dimensions

2 hp, 3 hp 25”

5 hp 28”

FAN CIRCULATION

[ 298 mm ]

12 in

ALLOW 3” CLEARANCE FOR

[ 288 mm ]

11.4 in

[ 232 mm ]

9.13 in

[ 276 mm ]

10.9 in

[258 mm]

10.2 in

[ 247 mm ]

9.7 in

HEIGHT TO 1/2”

NPT CONDUIT

RECEPTACLE

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

[ 358 mm ]

14 in

[ 166 mm ]

6.5 in

[ 635 mm ]

25 in

[ 264 mm ]

10.4 in

[ 168 mm ]

6.6 in

Pump Performance Curves

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

B

C

A

11110

11000

990

0

2

880

770

660

550

440

330

Total Dynamic Head in Ft of H

11

220

110

C

0

2200440

660

880011000011220011440011660011880022000022220022440022660022880033000

B

A

Volumetric Flow Rate in US Gallons Per Minute

Pump Model Curve

XFK-8 C

XPK-8 C

XFK-12 B

XPK-12 B

XFK-20 A

XPK-20 A

WHISPERFLOXF® and MAX-E-PROXF® Commercial 3-Phase Pump Installation and User’s Guide

*353077*

LIT. PKG. P/N 353077

1620 HAWKINS AVE., SANFORD, NC 27330 • [phone]
10951 WEST LOS ANGELES AVE., MOORPARK, CA 93021 • [phone]

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All indicated Pentair trademarks and logos are property of Pentair. Third party registered and unregistered trademarks and logos are the property
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products and services, Pentair reserves the right to change specications without prior notice.

© 2020 Pentair. All rights reserved. This document is subject to change without notice.

*353076*

P/N 353076 REV. E 10/5/20