STA-RITE MPRA6D-146L Guide

DYNA-GLASTM and DYNA-MAXTM
CENTRIFUGAL PUMPS
WITH INTEGRAL TRAP
O W N E R’ S M A N U A L
INSTALLATION, OPERATION & PARTS
Series MPRA, MPEA, and MPFA
See Page 2 for Model Numbers
This manual should be furnished to the end user of this pump;
its use will reduce service calls and chance of
injury and will lengthen pump life.
(Unions optional)
FOR POSITION ONLY
© 2010 Pentair Water Pool and Spa, Inc. All rights reserved.
1620 Hawkins Ave., Sanford, NC 27330 • [phone]
10951 West Los Angeles Ave., Moorpark, CA 93021 • [phone]
Customer Suppport: [phone]
Sta-Rite®, Dyna-Glas™ , Dyna-Max™ and Pentair Water Pool and Spa® is a trademark and/or a registered trademark of Pentair
Water Pool and Spa, Inc. and/or its affiliated companies in the United States and/or other countries. Plasto-Joint Stik® is a registered
trademark of La-Co Industries, Inc. Teflon® is a registered trademark of E.I. Du Pont De Nemours and Company Corporation. Unless
noted, names and brands of others that may be used in this document are not used to indicate an affiliation or endorsement between
the proprietors of these names and brands and Pentair Water Pool and Spa, Inc. Those names and brands may be the trademarks or
registered trademarks of those partiesor others.
04-15-10
S4243 (Rev. A)

2
‘MPRA’, ‘MPEA’ & ‘MPFA’
SERIES PUMPS WITH
TRAP
To avoid unneeded service calls, prevent possible
injuries, and get the most out of your pump, READ THIS
MANUAL CAREFULLY!
The Sta-Rite ‘MPRA’, ‘MPEA’ & ‘MPFA’ Series Self-
priming Centrifugal pump:
• Is designed for use with swimming pools or as a
centrifugal pump.
• Is an excellent performer; durable, reliable.
Table of Contents
Safety Instructions ...................................................2-3
Installation ................................................................3-4
Pool Pump Suction Requirements ............................4-5
Electrical...................................................................5-8
Operation.....................................................................9
Storage/Winterizing ................................................9-10
Pump Service .......................................................10-11
Repair Parts List ...................................................12-13
Troubleshooting Guide...............................................14
Warranty ....................................................................16
READ AND FOLLOW
SAFETY 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 will cause death,
serious personal
injury, or major property damage if ignored.
warns about hazards that can cause death,
serious personal
injury, or major property damage if ignored.
warns about hazards that will or can cause
minor personal injury or property damage if ignored.
NOTICE 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.
Incorrectly installed or tested equipment
may fail, causing severe injury or property
damage.
Read and follow instructions in owner's manual when
installing and operating equipment. Have a trained pool
professional perform all pressure tests.
Single Speed Models
HP MPRA MPEA MPFA
3/4 MPRA6D-146L, MPRA6D-146LC MPEA6D-146L MPFA6D-176L
1 MPRA6E-147L, MPRA6E-147LC MPEA6E-147L MPFA6E-146L
1-1/2 MPRA6F-148L, MPRA6F-148LC MPEA6F-148L MPFA6F-147L
2 MPRA6G-155L, MPR6G-155LC MPEA6G-155L
2-1/2 MPEAA6G-168L
Two Speed Models
HP MPRA MPEA
1-1/2 MPRA6YF-174L, MPRA6YF-174LS
2 MPEA6YG-175L
MPEA6YG-175LS
2-1/2 MPEAA6YG-168L
MPEAA6YG-168LS

3
1. Do not connect system to a high pressure or city
water system.
2. Use equipment only in a pool or spa installation.
3. Trapped air in system can cause explosion. BE SURE
all air is out of system before operating or testing
equipment.
Before pressure testing, make the following safety
checks:
• Check all clamps, bolts, lids, and system accessories
before testing.
• Release all air in system before testing.
• Tighten Sta-Rite trap lids to 30 ft. lbs. (4.1 kg-m)
torque for testing.
• Water pressure for test must be less than 25 PSI (7.5
kg/cm2).
• Water Temperature for test must be less than 100oF.
(38oC).
• Limit test to 24 hours. After test, visually check
system to be sure it is ready for operation. Remove
trap lid and retighten hand tight only.
NOTICE: These parameters apply to Sta-Rite
equipment only. For non-Sta-Rite equipment, consult
manufacturer.
INSTALLATION
Only qualified, licensed personnel should install pump
and wiring.
Pump mount must:
Be located away from corrosive or flammable liquids.
Have enough ventilation to maintain air temperature at
less than the maximum ambient temperature rating (Max.
Amb.) listed on the motor model plate. If this pump is
installed in an enclosure/pump house, the enclosure must
have adequate ventilation and air circulation to keep the
temperature in the enclosure at or below the motor’s rated
ambient temperature whenever the pump is running.
Be solid - Level - Rigid - Vibration free. (To reduce
vibration and pipe stress, bolt pump to mount.)
Allow pump suction inlet height to be as close to water
level as possible. Pump will not lift water more than
10'(3m).
Allow use of short, direct suction pipe (To reduce friction
losses).
Allow for gate valves in suction and discharge piping.
Have adequate floor drainage to prevent flooding.
Be protected from excess moisture.
Allow adequate access for servicing pump and piping.
Fire and burn hazard. Modern motors run
at high temperatures. To reduce the risk of fire, do not
allow leaves, debris, or foreign matter to collect around
the pump motor. To avoid burns when handling the
motor, let it cool for 20 minutes before trying to work on
it.
NOTICE: When connecting threaded pipe directly to
IMPORTANT SAFETY
INSTRUCTIONS
Always follow basic safety precautions with this
equipment, including the following.
To reduce the risk of injury, do not
permit children to use this product unless they are
closely supervised at all times.
This pump is for use with permanently
installed 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 may be readily disassembled
for storage and reassembled to its original integrity.
SAVE THESE
INSTRUCTIONS
STRAINER BASKET
COVER
DISCHARGE PORT
TO FILTER OR POOL
SUCTION
PORT
FROM
POOL
OR
VACUUM
FILTERS
PUMP MAY BE BOLTED TO LEVEL
FOUNDATION OR MOUNTING BRACKET 037 0893
NOTICE: Port threads are: Internal - 2" NPT for direct
connection to pipe. External - 3-1/4" Buttress. Fits Sta-Rite
U11-200P Union Collar for quick disconnect pipe
connection.
Figure 1

4
pump, use Teflon tape or Plasto-Joint Stik to seal
connections. Do not use pipe dope; pipe dope causes
cracking in some plastics and may damage components
in piping system.
When connecting pipe to pump with union half, use
Teflon tape or Plasto-Joint Stik between pipe and union
adapter. Union collar to pump should be assembled dry
and hand-tight.
NOTICE: Pump suction and discharge connections
have molded in thread stops. DO NOT try to screw pipe
in beyond these stops.
Teflon Taping Instructions:
Use only new or clean PVC pipe fittings.
Wrap male pipe threads with one to two layers of Teflon
tape. Cover entire threaded portion of pipe.
Do not overtighten or tighten past thread stop in pump
port!
If leaks occur, remove pipe, clean off old tape, rewrap
with one to two additional layers of tape and remake the
connection.
NOTICE: Support all piping connected with pump!
Piping:
Use at least 2" (51mm) pipe. Increase size if a long run
is needed.
To avoid strains on the pump, support both suction and
discharge pipes independently. Place these supports
near the pump.
To avoid a strain left by a gap at the last connection,
start all piping at the pump and run pipe away from the
pump.
To avoid airlocking, slope suction pipe slightly upward
toward the pump.
NOTICE: To prevent flooding when removing pump for
service, all flooded suction systems must have gate
valves in suction and discharge pipes.
POOL PUMP SUCTION
REQUIREMENTS
Pump suction is
hazardous and can trap
and drown or disembowel
bathers. Do not use or
operate swimming pools,
spas, or hot tubs if a suction
outlet cover is missing,
broken, or loose. Follow the
guidelines below for a pump
installation which minimizes
risk to users of pools, spas,
and hot tubs.
Entrapment Protection
The pump suction system
must provide protection
against the hazard of
suction entrapment or hair entrapment/entanglement.
Suction Outlet Covers
All suction outlet covers must be maintained. They must
be replaced if cracked, broken, or missing.
See Page 5 for outlet cover certification requirements.
All suction outlets must have correctly installed, screw-
fastened covers in place.
Suction Outlets Per Pump (Figure 2, Page 5)
Provide at least two hydraulically balanced main drains,
with covers, as suction outlets for each circulating pump
suction line. The centers of the main drains (suction
outlets) on any one suction line must be at least three feet
apart.
The system must be built so that it cannot operate with
the pump drawing water from only one main drain (that
is, there must be at least two main drains connected to
the pump whenever it is running – see Figure 2, Page
5). However, if two main drains run into a single suction
line, the single suction line may be equipped with a
valve which will shut off both main drains from the pump
(see Figure 2).
More than one pump can be connected to a single
suction line as long as the requirements above are met.
Hazardous suction.
Can trap hair or
body parts, causing
severe injury
or death.
Do not block
suction.

5
Water Velocity
The maximum water velocity through the suction fitting
or cover for any suction outlet must be 1.5 feet per
second unless the outlet complies with the latest
ASME/ANSI Specification for Suction Fittings For Use in
Swimming Pools, Spas, Hot Tubs, and Whirlpool
Bathtub Applications. In any case, do not exceed the
suction fitting’s maximum designed flow rate.
If 100% of the pump’s flow comes from the main drain
system, the maximum water velocity in the pump
suction hydraulic system must be six feet per second or
less even if one main drain (suction outlet) is completely
blocked. The flow through the remaining main drain(s)
must comply with the latest ASME/ANSI Specification
for Suction Fittings For Use in Swimming Pools, Spas,
Hot Tubs, and Whirlpool Bathtub Applications.
Testing and Certification
Suction outlet covers must have been tested by a
nationally recognized testing laboratory and found to
comply with the latest ASME/ANSI Specifications for
Suction Fittings For Use in Swimming Pools, Spas, Hot
Tubs, and Whirlpool Bathtub Applications.
Fittings:
Fittings restrict flow; for best efficiency use fewest
possible fittings (but at least two suction outlets).
Avoid fittings which could cause an air trap.
Pool fittings must conform to International Association
of Plumbing and Mechanical Officials (IAPMO)
standards.
Use only non-entrapping suction fitting or double suction.
ELECTRICAL
Ground motor before connecting to electrical
power supply. Failure to ground motor can cause
severe or fatal electrical shock hazard.
Do not ground to a gas supply line.
To avoid dangerous or fatal electrical shock, turn
OFF power to motor before working on electrical
connections.
Ground Fault Circuit Interrupter (GFCI) tripping
indicates an electrical problem. If GFCI trips and
will not reset, have a qualified electrician inspect and
repair electrical system.
Exactly match supply voltage to nameplate
voltage. Incorrect voltage can cause fire or
seriously damage motor and voids warranty. If in doubt
consult a licensed electrician.
Voltage
Voltage at motor must be not more than 10% above or
below motor nameplate rated voltage or motor may
overheat, causing overload tripping and reduced
component life. If voltage is less than 90% or more than
110% of rated voltage when motor is running at full
load, consult power company.
At Least
3 Feet
Suction Outlet
(Main Drain)
Suction Outlet
(Main Drain)
IAPMO Certified
Anti-entrapment
Cover or Suction Fitting,
screw-fastened to
Main Drain Sump
IAPMO Certified
Anti-entrapment
Cover or Suction Fitting,
screw-fastened to
Main Drain Sump
Pump
Valves OK between
pump and Tee
No valves between
Tee and Main Drains
2762 0197
Figure 2 – Recommended pump suction layout.

6
Grounding/Bonding
Install, ground, bond and wire motor according to local
or National Electrical Code requirements.
Permanently ground motor. Use green ground terminal
provided under motor canopy or access plate (See
Figure 3); use size and type wire required by code.
Connect motor ground terminal to electrical service
ground.
Bond motor to pool structure. Use a solid copper
conductor, size No. 8 AWG (8.4 sq.mm) or larger. Run
wire from external bonding lug (see Figure 3) to reinforcing
rod or mesh.
Connect a No. 8 AWG (8.4 sq.mm) solid copper
bonding wire to the pressure wire connector provided
on the motor housing and to all metal parts of the
swimming pool, spa, or hot tub and to all electrical
equipment, metal piping or conduit within 5 feet (1.5 m)
of the inside walls of swimming pool, spa, or hot tub.
Wiring
NOTICE: 3 phase models require magnetic motor
starters and external overload protection. If in doubt
about the procedure, consult a licensed electrician.
Pump must be permanently connected to circuit. Table
I, Page 8, give correct wire and circuit breaker sizes for
the pump alone. If other lights or appliances are also on
the same circuit, be sure to add their amp loads to
pump amp load before figuring wire and circuit breaker
sizes. (If unsure how to do this or if this is confusing,
consult a licensed electrician.) Use the load circuit
breaker as the master on-off switch.
Install a Ground Fault Circuit Interrupter (GFCI) in
circuit; it will sense a short-circuit to ground and
disconnect power before it becomes dangerous to pool
users. For size of GFCI required and test procedures for
GFCI, see manufacturer’s instruction.
In case of power outage, check GFCI for tripping (which
will prevent normal pump operation). Reset if
necessary.
NOTICE: If you do not use conduit when wiring motor,
be sure to seal wire opening on end of motor to prevent
dirt, bugs, etc., from entering.
Risk of dangerous or fatal electrical shock.
Be sure that power to the motor circuit is off before
working on wiring, wiring connections, or motor. Re-
install the motor end cover and all other wiring covers
before turning on the power.
Motor Switch Settings
Dual-voltage motors (motors that can operate at either
115 or 230 volts), are set at the factory to 230 volts. Do
not change motor voltage setting if line voltage is 230
volts, or if you have a single voltage motor.
NOTE: Never wire a 115 volt motor to a 230 volt line.
Remove Motor End Cover
If you have a dual-voltage motor, and will connect it to
115 volts, follow the procedure below.
You will need to remove the motor end cover to change
the voltage setting.
Your motor terminal board (located under the motor end
cover) should look like one of those below.
Plug Type Voltage Selector
To change to 115 volts:
1. Make sure power is off.
2. Pull the plug straight up.
A
A
L2
L2
L1
L1
230V
115V
Bonding
Lug
Green
Ground
Screw
Figure 3 – Typical ground screw and bonding lug
locations.
Figure 5 – Voltage set to 230 volts, Plug Type.
Voltage Change
Plug
Ground
Screw
Power Lead
Terminals
Figure 4 - Removing motor end cover.

7
3. Move and attach the plug at the 115 volt position.
The plug will now cover 2 metal tabs. The arrow on
the plug will point to 115V.4. Attach the power lead
wires to the power lead terminals. Make sure the
wires are secure.
5. Attach the ground wire to the green ground screw
6. Reinstall the Motor end cover
Dial Type Voltage Selector
To change to 115 volts:
1. Make sure power is off.
2. Turn the dial counter-clockwise until 115 shows in
the dial window.
3. Attach the power lead wires to the power lead
terminals. Make sure the wires are secure.
4. Attach the ground wire to the green ground screw
5. Reinstall the Motor end cover.
To Wire a Two-Speed Motor
Wire the pump as shown in the diagram.
OPERATION
NOTICE: NEVER run pump dry. Running pump dry may
damage seals, causing leakage and flooding. Fill pump
with water before starting motor.
Before removing trap cover:
1. STOP PUMP before proceeding.
2. CLOSE GATE VALVES in suction and discharge
pipes.
3. RELEASE ALL PRESSURE from pump and piping
system.
If pump is being pressure tested, be sure pressure
has been released before removing trap cover.
Do not block pump suction. To do so with body
may cause severe or fatal injury. Small children
using pool must ALWAYS have close adult supervision.
Fire and burn hazard. Modern motors run
at high temperatures. To reduce the risk of fire, do not
allow leaves, debris, or foreign matter to collect around
the pump motor. To avoid burns when handling the
motor, let it cool for 20 minutes before trying to work on
it. An automatic internal cutoff switch protects the motor
from heat damage during operation.
Priming Pump
Release all pressure from filter, pump, and piping
system; see the filter owner’s manual.
In a flooded suction system (water source higher than
pump), pump will prime itself when suction and
discharge valves are opened.
If pump is not in a flooded suction system, unscrew and
remove trap cover (see Figure 8); fill trap and pump with
water.
Clean and inspect O-Ring; reinstall on trap cover.
Do not lubricate the trap cover O-Ring. The original
equipment O-Ring contains a permanent internal
lubricant.
NOTICE: If you replace the O-Ring with a non-internally
lubricated O-Ring, you may need to apply a silicone
based lubricant.
Replace trap cover on trap; turn clockwise to tighten
cover.
NOTICE: Tighten trap cover by hand only (no
wrenches)!
Figure 7 – 2-Speed motor wiring diagram.
L2=COM
L1=HI
A=LOW
A
L2
L1
Power Supply for
Optional Timer.
Low Speed
High Speed Circuit
Protector
Remote
SPDT
Switch
Ground (Green)
Common
If using timer, Connect
Timer Motor to Low Speed Only
Minimum switch and timer amp rating must equal Branch Fuse
Rating given in "Recommended Fusing and Wiring Data" table.
230
Volt
Lines
Back of
motor
with
Terminal
Board
4558 0304
Figure 6 – Voltage set to 230 volts, Dial Type.
Voltage
Change Dial
Ground
Screw
Power Lead
Terminals

8
TABLE I - RECOMMENDED CIRCUIT BREAKER AND WIRING DATA
Serv. to Motor - Dist. in Ft. (M)
Motor Branch CB Max Load Voltage/ 0-100' 101-200' 201-300'
HP Rating Amps Amps Hz/Phase (0-30) (30-60) (60-90)
MPRA SERIES – SINGLE SPEED
3/4 20/15 13.4/6.7 115/230/60/1 12/14(3/2) 10/14(5.5/2) 8/14(8.4/2)
1 20/15 15.3/7.6 115/230/60/1 12/14(3/2) 8/14(8.4/2) 6/14(14/2)
1-1/2 25/15 19.2/9.6 115/230/60/1 10/14(5.5/2) 8/14(8.4/2) 6/12(14/3)
2 20 12.0 230/60/1 14(2) 14(2) 12(3)
MPEA SERIES – SINGLE SPEED
3/4 15/15 11.0/5.5 115/230/60/1 14/14(2/2) 10/14(5.5/2) 8/14(8.4/2)
1 20/15 13.8/6.9 115/230/60/1 12/14(3/2) 10/14(5.5/2) 8/14(8.4/2)
1-1/2 25/15 16.0/8.0 115/230/60/1 12/14(3/2) 8/14(8.4/2) 6/14(14/2)
2 15 10.1-3.7 230/60/1 14(2) 14(2) 12(3)
2-1/2 15 11.9-3.5 230/60/1 14(2) 14(2) 12(3)
2 15 10.4 230/60/1 14(2) 14(2) 12(3)
2-1/2 15 11.2 230/60/1 14(2) 14(2) 12(3)
MPFA SERIES – SINGLE SPEED
3/4 15/15 9.9/5.0 115/230/60/1 14/14(2/2) 10/14(5.5/2) 10/14(5.5/2)
1 20/15 13.4/6.7 115/230/60/1 12/14(3/2) 10/14(5.5/2) 8/14(8.4/2)
1-1/2 20/15 15.3/7.6 115/230/60/1 12/14(3/2) 8/14(8.4/2) 6/14(14/2)
MPRA SERIES – TWO SPEED
1-1/2 – 1/4 15 9.2/2.5 230/60/1 14(2) 14(2) 12(3)
MPEA SERIES – TWO SPEED
2 – 1/3 15 10.1/3.7 230/60/1 14(2) 14(2) 12(3)
2-1/2 – 1/2 15 11.9/3.5 230/60/1 14(2) 12(3) 12(3)
AWG
Wire
Size
(mm2)
}
AWG
Wire
Size
(mm2)
}
AWG
Wire
Size
(mm2)
}
AWG
Wire
Size
(mm2)
}

9
Pump should prime now. Priming time will depend on
vertical length of suction lift and horizontal length of
suction piping.
If pump does not prime, make sure that all valves are
open, suction pipe end is under water, pump is not trying
to lift water more than 10'(3m), and that there are no leaks
in suction pipe. See Troubleshooting Guide, Page 14.
Storage/Winterizing:
NOTICE: Allowing pump to freeze will damage pump
and void warranty!
NOTICE: Do not use anti-
freeze solutions (except
propylene glycol) in your
pool/spa system. Propylene
glycol, “RV antifreeze”, is
non-toxic and will not
damage plastic system
components; other anti-
freezes are highly toxic and
may damage plastic
components in the system.
Drain all water from pump
and piping when expecting
freezing temperatures or
when storing pump for a long
time (see instructions below).
Keep motor dry and covered
during storage.
To avoid condensation/corrosion problems, do not
cover pump with plastic.
For outdoor/unprotected installations:
1. Enclose entire system in a weatherproof enclosure.
2. To avoid condensation/corrosion damage, allow
ventilation; do not wrap system in plastic.
3. Use a 40% propylene glycol/60% water solution to
protect pump to -50°F (-46°C).
Draining Pump
Explosion hazard. Purging the system with
compressed air can cause components to explode, with
risk of severe injury or death to anyone nearby. Use only
a low pressure (below 5 PSI), high volume blower when
air purging the pump, filter, or piping.
1. Pump down water level below all inlets to the pool.
To avoid dangerous or fatal electrical shock
hazard, turn OFF power to motor before draining
pump.
2. Remove trap cover and use low pressure air to blow
accumulated water from the piping system. Use a pry
bar or board to remove trap covers that have been
overtightened or have taken a set and cannot be
removed by hand. Lugs have been provided on the
trap lid to use a lever or pry bar for loosening (see
Figure 6).
3. Cap inlet piping after draining to keep water out of
the pipes.
4. To prevent pump from freezing, remove trap cover and
drain the tank body through the two drain plugs
provided.
A. Gravity drain system as far as possible.
B. Protect areas which retain water with non-toxic
propylene glycol antifreeze (“RV” antifreeze).
5. Clean pump thoroughly; replace trap cover.
NOTICE: Tighten trap cover by hand only (no
wrenches)! If pump is not anchored, use caution to
not break attached piping!
6. Be sure motor is kept dry and covered.
TO REMOVE
OVERTIGHT
LID
BOARD
Figure 8 – Use a pry bar or board as shown to remove
tight lid. Do not use a pry bar to tighten lid.
Hazardous suction.
Can trap hair or
body parts, causing
severe injury
or death.
Do not block
suction.

10
Startup For Winterized
Equipment
1. Remove any temporary
weather protection placed
around system for
shutdown.
2. Follow filter manufacturer’s
instructions for reactivation
of the filter.
3. Inspect all electrical wiring
for damage or
deterioration over the
shutdown period. Have a
qualified serviceman repair
wiring as needed.
4. Inspect and tighten all
watertight connections.
5. Open all valves in suction and return piping.
6. Remove any winterizing plugs in piping system.
7. Drain all antifreeze from system.
8. Close all drain valves and replace all drain plugs in
piping system.
9. Prime pump according to instructions on Page 9.
PUMP SERVICE
Pump should only be serviced by qualified personnel.
For best results, use only genuine Sta-Rite factory
parts.
Be sure to prime pump (Page 9) before starting.
Before removing trap cover:
1. STOP PUMP before proceeding.
2. CLOSE GATE VALVES in suction and discharge
pipes.
3. RELEASE ALL PRESSURE from pump and piping
system.
To avoid dangerous or fatal electrical shock
hazard, turn OFF power to motor before working
on pump or motor.
Aside from lubricating trap cover O-Ring, no lubrication
or regular maintenance is needed beyond reasonable
care and periodic cleaning of strainer basket. If shaft
seal is worn or damaged, repair as follows:
Pump Dissasembly/Removing Old Seal
Disconnect power to pump motor.
Be sure valves on suction and return piping are
closed before starting work.
Release all pressure by opening all vents before
starting work.
1. Drain pump by removing drain plugs on bottom of
pump body and trap body.
2. Be sure there is no pressure in trap body; remove
cover (unscrew by turning counterclockwise).
3. Remove 6 nuts, lockwashers and flat washers holding
seal plate to pump body. Pull seal plate and motor
away from pump body. (You may have to
CAREFULLY use a
screwdriver to separate
body from seal plate.)
4. Remove seven screws
and washers holding
diffuser to seal plate.
Remove diffuser.
5. Remove motor canopy.
Being careful not to
touch capacitor
terminals, loosen
capacitor clamp and
move capacitor to one
side.
6. Hold shaft with 7/16"
open-end wrench on
motor shaft flats.
7. Unscrew impeller from
shaft (turn counterclockwise when facing it).
NOTICE: On 2 HP model, remove impeller screw
(left hand thread - turn clockwise) and gasket
before removing impeller. Inspect gasket for
damage, cracks, etc. Replace if damaged.
8. Remove four screws holding seal plate to motor.
9. Place seal plate face down on flat surface and tap
out ceramic seat (Figure 10).
10. Remove slinger from motor shaft and inspect for
damage or abrasion.
11. Clean seal cavity in seal plate and clean motor
shaft.
TO REMOVE
OVERTIGHT
LID
BOARD
Figure 9 – Use a pry bar or board as shown to remove
tight lid. Do not use a pry bar to tighten lid.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.

11
Pump Reassembly/Installing New Seal
1. Ceramic seat must be clean and free of dirt, grease,
dust, etc. Wet outer edge with small amount of
liquid detergent; press ceramic seat into seal plate
cavity firmly and squarely with finger pressure
(Figure 11).
2. If ceramic seat will not locate properly, remove it,
place face up on bench and reclean cavity. Ceramic
seat should now locate.
3. If seat still will not locate properly, place a
cardboard washer over the polished face and use a
piece of 3/4" (19mm) standard pipe for pressing
purposes.
NOTICE: Be sure not to scratch or mar polished
surface or seal will leak.
4. Replace slinger on end of motor shaft so that
impeller sleeve will push it into position. If slinger
shows signs of wear or damage, replace it.
5. Remount seal plate on motor. Tighten bolts to 60-80
inch-lbs. (69-92 kg/cm) torque.
6. Apply a small amount of liquid detergent to inside
diameter of rotating half of seal.
7. Slide rotating seal member, polished carbon face
out, over impeller sleeve until rubber drive ring hits
back of impeller.
NOTICE: Be sure not to nick or scratch polished
seal face; seal will leak if face is damaged.
8. Screw impeller onto shaft (clockwise); this will
automatically locate seal in seal plate.
NOTICE: On 2 and 2-1/2 HP models; install
impeller gasket and lock screw (left-hand thread -
turn counterclockwise). Torque lock screw to 50-55
inch-lbs. (57.6-63 kg/cm).
9. Mount diffuser on seal plate; tighten screws to 10-
14 inch-lbs. (11.2-16.1 kg/cm) torque.
10. Assemble motor and seal plate to pump body with
nuts, flat washers and lock washers. Torque nuts to
120-130 in-lbs. (138-150 kg/cm).
11. Prime pump according to instructions on Page 9.
TROUBLESHOOTING
GUIDE
Read and understand safety and operating
instructions in this manual before doing any work on
pump!
Only qualified personnel should electrically test
pump motor!
FAILURE TO PUMP; REDUCED CAPACITY OR
DISCHARGE PRESSURE
Suction leaks/lost prime:
1. Pump must be primed; make sure that pump volute
and trap are full of water. See priming instructions,
Page 9.
2. Make sure there are no leaks in suction piping.
3. Make sure suction pipe inlet is well below the water
level to prevent pump from sucking air.
4. If suction trap gasket is defective, replace it.
5. Make sure pump is not trying to lift water more than
10'(3m).
6. Make sure suction pipe is at least 2" (51mm) in
diameter.
Clogged pipe/trap/impeller, worn impeller:
7. Make sure suction trap is not clogged; if it is, clean
trap and strainer.
8. Make sure impeller is not clogged (follow steps 1
through 7 under “Removing Old Seal”, Page 11;
check impeller for clogging; follow steps 7 through
11 under “Installing New Seal”, Page 11, for
reassembly).
9. Impeller and diffuser may be worn. If so, order
replacement parts from Repair Parts List, Pages 12
and 13.
Figure 10
Mechanical seal
ceramic seat
Polished
surface Rubber
surface
Figure 11

12
123
45
6
788A 8B
See
Box A
See
Box A
11
12
13
14
15B
15A
16
17
18
19
20
21
22
23
24
9
10
1169 0794
REPAIR PARTS LIST
DYNA-GLAS™ & DYNA-MAX™ POOL
PUMP
3/4 through 2-1/2 HP Models
Single Speed and Two Speed
Model No. HP Motor (Key No. 1)
Single Speed 115/230/60/1
MPRA6D-146L 3/4 A100DLL
MPRA6E-147L 1 A100ELL
MPRA6F-148L 1-1/2 A100FLL
MPEA6D-146L 3/4 AE100DLL
MPEA6E-147L 1 AE100ELL
MPEA6F-148L 1-1/2 AE100FLL
MPFA6D-176L 3/4 A100DLL
MPFA6E-146L 1 A100ELL
MPFA6F-147L 1-1/2 A100FLL
230/60/1
MPRA6G-155L 2 A100GLL
MPEA6G-155L 2 AE100GLL
MPEAA6G-168L 2-1/2 AE100G5LL
Two Speed 230/60/1
MPRA6YF-174L 1-1/2 A100FLL-Y
MPRA6YF-174LS 1-1/2 A100FLL-Y
MPEA6YG-175L 2 AE100GLL-Y
MPEA6YG-175LS 2 AE100GLL-Y
MPEAA6YG-168L 2-1/2 AE100G5LL-Y
MPEAA6YG-168LS 2-1/2 AE100G5LL-Y
For quick disconnect pipe
connections, purchase separately:
Pkg. 188 2" Slip 1/2 Union Kit
or
Pkg. 189 2" NPT 1/2 Union Kit.
Note that these kits include both the
inlet and outlet connectors.
Includes:
U11-200P Union Collar - Qty 2
U9-362 O-Ring - Qty 2
U11-196PS 2" Slip adapter - Qty 2
or
U11-199PS 2" NPT adapter. - Qty 2
Box A

13
MPEA6F-148L
MPFA6F-147L MPEA6G-155L
MPFA6D-176L MPEA6E-147L MPRA6F-148L MPRA6G-155L
MPEA6D-146L MPFA6E-146L MPRA6F-148LC MPR6G-155LC MPEAA6G-168L
MPRA6D-146L MPRA6E-147L MPRA6YF-174L MPEA6YG-175L MPEAA6YG
168L
Key Part MPRA6D-146LC MPRA6E-147LC MPRA6YF-174LS MPEA6YG-175LS MPEAA6YG
168LS
No. Description Qty. 3/4 HP 1 HP 1-1/2 HP 2 HP 2-1/2 HP
2 Screw #10-32x1/2" 1 U30-692SS U30-692SS U30-692SS U30-692SS U30-692SS
3 Bonding Lug 1 U17-568 U17-568 U17-568 U17-568 U17-568
4 Slinger (MPFA, MPRA Series) 1 17351-0009 17351-0009 17351-0009 17351-0009 17351-0009
4 Slinger (MPEA Series) 1 C69-24 C69-24 C69-24 C69-24 C69-24
5 Seal Plate 1 C3-184P C3-184P C3-184P C3-184P C3-184P
6 Seal Plate Cord Ring 1 U9-373 U9-373 U9-373 U9-373 U9-373
7 Shaft Seal 1 37400-0027 37400-0027 37400-0027 37400-0027 37400-0027
8 Impeller* 1 C105-236P C105-236PB C105-236PC C105-236PDA C105-236PEA
8 Impeller (MPRA6Y, MPEA6Y
and MPEAA6Y only) 1 – – C105-236PF C105-236PGAB C105-236PEA
8 Impeller (MPFA6D, MPFA6E, MPFA6F only) 1 C105-236PJ C105-236P C105-236PB – –
8A Gasket 1 – – – 33455-1047 33455-1047
8B Impeller Lock Screw 1 – – – 37337-6080 37337-6080
9 Diffuser 1 C1-270PB C1-270PC C1-270P C1-270P C1-270P
10 Diffuser O-Ring 1 U9-374 U9-374 U9-374 U9-374 U9-374
11 Tank and Trap Body (Only) 1 C76-58P C76-58P C76-58P C76-58P C76-58P
12 Trap Cover 1 C3-185P C3-185P C3-185P C3-185P C3-185P
13 Trap Cover O-Ring 1 U9-375 U9-375 U9-375 U9-375 U9-375
14 Trap Basket 1 C8-58P C8-58P C8-58P C8-58P C8-58P
15A Drain Plug 2 U178-920P U178-920P U178-920P U178-920P U178-920P
15B Mounting Screw 5/16-14x5/8" 2 U30-919SS U30-919SS U30-919SS U30-919SS U30-919SS
16 Base - Plastic 1 C4-77P C4-77P C4-77P C4-77P C4-77P
• Base - Steel (LS Suffix) 1 – – 17303-0113 17303-0113 17303-0113
17 Motor Pad - for Plastic Base 1 C35-45 C35-45 C35-45 C35-45 C35-45
17 Motor Pad - for Steel Base (LS Suffix) 1 – – C35-5 C35-5 C35-5
18 Screw #8-32x7/8" Rd. Hd. 7 U30-542SS U30-542SS U30-542SS U30-542SS U30-542SS
19 Lock Washer #8 Ext. Tooth 7 U43-21SS U43-21SS U43-21SS U43-21SS U43-21SS
20 Flat Washer 3/8" 6 U43-62SS U43-62SS U43-62SS U43-62SS U43-62SS
21 Lock Washer 3/8" 6 U43-12SS U43-12SS U43-12SS U43-12SS U43-12SS
22 Nut 3/8-16 Hex. nickel-plated brass 6 71403 71403 71403 71403 71403
23 Cap Screws 3/8-16x1-1/4" Hex. (LS Suffix) 2 – – U30-75SS U30-75SS U30-75SS
• Lock Washer 3/8" (LS Suffix) 2 – – U43-12SS U43-12SS U43-12SS
24 Cap Screws 3/8-16x1" Hex. * 4 U30-74SS U30-74SS U30-74SS U30-74SS U30-74SS
• Nameplate 1 32155-4071 32155-4071 32155-4071 32155-4071 32155-4071
• Tag, “CAUTION This pump equipped with 1 61002-0002 61002-0002 61002-0002 61002-0002 61002-0002
mechanical shaft seal…”
• Voltage Sticker 1 U27-153 U27-153 U27-153 U27-68 U27-68
REPAIR PARTS LIST
DYNA-GLAS™ & DYNA-MAX™ POOL PUMP
3/4 through 2-1/2 HP Models Single Speed and Two Speed
• Not illustrated.
* Models with “LS” suffix use 2 only.

14
Electrical:
10. Pump may be running too slowly; check voltage at
motor terminals and at meter while pump is running.
If low, see wiring instructions or consult power
company. Check for loose connections.
11. Pump may be too hot.
A. Check line voltage; if less than 90% or more
than 110% of rated voltage consult a licensed
electrician.
B. Increase ventilation.
C. Reduce ambient temperature.
D. Tighten any loose connections.
MECHANICAL TROUBLES AND NOISE
1. If suction and discharge piping are not adequately
supported, pump assembly will be strained. See
“Installation”, Page 3.
2. Do not mount pump on a wooden platform!
Securely mount on concrete platform for quietest
performance.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.

15

S243 (Rev.A) 04-15-10
*S243*