Pentair Myers ME40 Series Manual

23833A245 (Rev.7/30/10)
ME40/ME40AG SERIES
Submersible Sump,
Effluent & Sewage Pumps
Installation and Service Manual
Automatic and manual models. Single phase power only — 115 or 230 volt.

23833A245 2
DESCRIPTION AND APPLICATION
ME40
Myers ME40 Series Pumps are single seal units,
automatic or manual, designed for use in effluent
dosing. Septic Tank Effluent Pumping (S.T.E.P.) or
normal sump and general dewatering applications
where higher pressure is required. DO NOT USE FOR
RAW SEWAGE.
When used in effluent dosing or S.T.E.P. applications,
the pump must be installed in a separate tank or
compartment at the discharge side of the septic tank.
NEVER INSTALL PUMP IN MAINTANK WHERE
SLUDGE COLLECTS.
Impellers are enclosed two-vane type to handle
3/4” spherical solids and are made of engineered
thermoplastic. All pumps have a 1-1/2” NPT
discharge tapping. NOTE: DO NOT OVERTIGHTEN
DISCHARGE PIPE INTO PUMP PLASTIC
DISCHARGE FITTING.
General
These pumps are available in 115 volt or 230 volt,
single phase, 4/10 HP motors. All units are single seal
only, available in automatic or manual with either 10’or
20’power cords. All power cords have either 115 volt
or 230 volt grounded plugs.
These pumps are NOT for use in swimming pools or
fountains.
ME40AG
The ME40AG Series Pumps are single seal units
designed for use in continuous run agricultural
evaporative cooling applications. They will run
continuously in elevated temperatures with clean
sump water.
The wetted pump components are the same as
already described for the ME40 series.
AIR LOCKING
A sump pump is said to be air locked if water traps air
in the pump and it cannot get out, thus preventing the
pump from operating.
The ME40/ME40AG pumps have a 1/16” air vent hole
in the impeller chamber to let out trapped air. If this
hole becomes plugged, the pump may air lock. As
a secondary precaution a 1/8” hole should be drilled
in the discharge pipe below the check valve. The
check valve should be 12 to 18 inches above pump
discharge. Do not put check valve directly into pump
discharge opening.
PACKAGING
Each pump is packaged separately in a carton marked
with a catalog number and Myers engineering number.
Catalog Engineering Cord
No. No. HP V Ph Lgth. Type
ME40A-11 25300D000 4/10 115 1 10’ Auto
ME40M-11 25300D001 4/10 115 1 10’ Manual
ME40AC-11 25300D010 4/10 115 1 20’ Auto
ME40MC-11 25300D011 4/10 115 1 20’ Manual
ME40AC-21 25300D012 4/10 230 1 20’ Auto
ME40MC-21 25300D013 4/10 230 1 20’ Manual
ME40P-1 25300D900 4/10 115 1 10’ Auto
ME40PC-1 25300D901 4/10 115 1 20’ Auto
ME40P-2 25300D902 4/10 230 1 10’ Auto
ME40PC-2 25300D903 4/10 230 1 20’ Auto
ME40AG-11 27234D001 4/10 115 1 20’ Manual
ME40AG-21 27234D002 4/10 230 1 20’ Manual
LEVEL CONTROLS
All pumps must use sealed level control switches for
automatic operation. All automatic pumps have built-
in level control float switches. The power cord has a
GROUND PIN that plugs into a grounded receptacle.
The grounded receptacle cannot be used in the wet
sump or basin due to DANGER of current leakage.
Manual pumps can be made automatic with MLC or
MFLC controls with a series plug. Plug the MLC or
MFLC witch cord series plug into a proper voltage
GROUNDED RECEPTACLE. Then plug the pump
cord plug into the back of the switch cord series plug.
NOTE: The float control must be tethered a minimum
4” to pump or discharge pipe. Control must float free
from pump and basin wall.
On all duplex units or simplex installations with
additional options like high water alarm, the power
cord plug must be cut off and wired into a control
panel or into a sealed junction box if used in wet sump
or basin. The AWS-1 control also acts as a sealed
junction box for connecting power cord to pump cord.
NOTE: The ME40 sump/effluent pump can be easily
changed from one style, automatic or manual, to the
other by only interchanging the plug ends of the float
control with the manual plug. The ball float must be
tethered with a cable clamp, as
shown. DO NOT REMOVETHE
MOTOR CAP.
The ME40P pumps have a
mechanical (mercury free) float
switch with a 10’ or 20’ cord with a
115 volt or 230 volt piggyback
plug with the switch mounted to
the pump. Plug the switch cord
plug into a proper voltage, properly
grounded outlet and plug the
power cord into the back of the
switch cord and tape the cords to
the discharge pipe every 12”.

23833A245
3
DESIGN OF PRESSURE SEWER SYSTEMS
Myers has available complete computer software for
designing PRESSURE SEWER SYSTEMS. This
gives pipe sizes to use and gives exact flow from
any pump or group of pumps in the system when
operating simultaneously. This design DISK for IBM®
or COMPATIBLE computers is available to engineers
on request.
MOTORTYPE
The motors used in the ME40/ME40AG pumps are
pressed into the cast iron housing and surrounded by
dielectric oil for the greatest heat dissipation. The
ME40 uses a shaded pole, 4/10 HP, 1550 RPM motor.
The ME40AG uses a permanent split capacitor, 4/10
HP, 1625 RPM motor. Both units have Class A motor
insulation, are available in single phase 115 or 230 volt
with overload protection, and use a lower ball bearing -
upper sleeve bearing. These pumps have no starting
switches and do not require a control panel for simplex
installation.
SAFETYWARNINGS
WARNING: Risk of electric shock. Pumps are
supplied with a grounding conductor and grounding-
type attachment plug on the power cord. To reduce
the risk of electric shock, be certain that it is
connected only to a properly grounded, grounding-
type receptacle. DO NOT cut off ground pin or use an
adapter fitting. DO NOT use an extension cord with
this pump. Entire plug may be cut off it a control panel
is used.
When wiring this pump, follow all local electrical and
safety codes and ordinances as well as the most
recent National Electric Code (NEC-ANSI/NFPA 70).
All pumps have a GROUND WIRE that is connected to
the motor. This wire goes to the receptacle or control
panel which must be connected to a good outside
GROUND such as a metal water pipe or GROUND
STAKE DRIVEN AT LEAST 8 feet into the ground.
UL AND CSA APPROVAL
All pumps have UL and CSA approval. Myers is a
SSPMA certified pump member.
INSTALLATION
WARNING: Basin or tank must be vented in
accordance with local plumbing codes. These pumps
are not designed for and CANNOT be installed in
locations classified as hazardous in accordance with
the National Electric Code ANSI/NFPA 70.
CAUTION: Never enter pump chamber after
sewage or effluent has been in basin. Sewage
water can give off methane, hydrogen sulfide, and
other gasses which are highly poisonous. For this
reason, Myers recommends installing effluent pumps
with a quick removal system. The quick removal
system may be a union or Cam-lok® coupling if
the pipe or discharge hose is within reach from the
surface, or a rail system type quick disconnect on
deeper installations. See installation drawings for
suggested installation.
The dosing tank or pumping chamber must be
constructed of corrosion resistant materials and must
be capable of withstanding all anticipated internal and
external loads. It also must not allow infiltration or
exfiltration. The tank must have provisions for anti-
buoyancy. Access holes or covers must be adequate
size and be accessible from the surface to allow for
installation and maintenance of the system. Access
covers must be lockable or heavy enough to prevent
easy access by unauthorized personnel. The pumping
chamber holding capacity should be selected to allow
for emergency conditions.
The discharge pipe must be the same size as the pump
discharge, 1-1/2”or larger. In order to insure sufficient
fluid velocity to prevent any residual solids from
collecting in the discharge pipe, it is recommended that
a minimum flow of 2’per second be maintained. (12
GPM through 1-1/2”pipe, 21 GPM through 2”pipe and
46 GPM through 3” pipe). It is recommended that PVC
or equal pipe is used for corrosion resistance. A full flow
(ball or gate) shut-off valve must be installed to prevent
back flow of effluent if the pump must be removed for
service. A check valve must be installed on pressure
sewer systems and on other systems where conditions
allow to prevent back flow and to reduce wear on the
pump system.
A high water alarm must be installed on a separate
circuit from the pump circuit. The alarm should have
the ability to be tested for proper operation.
SCREEN
ME40AG pumps have a suction screen included in
the packaging. To secure the screen in place use two
screws (provided). Screen installation, maintenance,
and cleaning is the responsibility of the pump owner.
BEFORE DISMANTLING PUMP FOR
REPLACEMENT OF PARTS
Clean pump thoroughly. Knock off all scale and
deposits. Submerge complete unit in Clorox solution
for one hour before taking apart.

23833A245 4
ME40TYPICAL INSTALLATION

23833A245
5
9.19”
[233]
11.68”
[297]
5.66”
[144]
1½”NPT
Discharge
12.44”
[316]
3.89”
[99]
[Dimensions in mm]
DIMENSIONS
ME40 PERFORMANCE CURVE ME40AG PERFORMANCE CURVE
3.75”
ME40
Level Control
ME40AG
Suction Screen
60HZ PERFORMANCE
50HZ PERFORMANCE
230 VOLT AMPS
115 VOLT AMPS
40
35
30
25
20
15
10
5
0
TOTALHEADINFEET
TOTALGALLONSPERMINUTE
10 20 30 40 50 60 70 80
POWER(AMPS)
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00

23833A245 6
TROUBLE CHECK LIST
CONDITION
Pump does not run or start when
water is up in tank.
Pump runs but does not deliver flow
PROBABLE CAUSE
1. Check for blown fuse or tripped circuit breaker.
2. Check for defective level switch.
3. Where control panel is used be sure H-O-A switch is in the
AUTO position. If it does not run, turn switch to the HAND
position and if the pump runs then the trouble is in the auto-
matic electrical system. have ELECTRICIAN make electrical
checks.
4. Check for burned out motor. Occasionally lightning can dam-
age a motor even with lightning protection.
5. Where plug-in cords are used be sure contact blades are
clean and making good contact. DO NOT USE PLUG-IN
CORDS INSIDE A SUMP OR WET WELL.
6. Level control ball or weight may be stuck on side of basin. Be
sure it floats freely.
1. Check for air lock. Start and stop pump several times, if this
does not help it may be necessary to loosen a union in the
discharge line to relieve air lock.
2. Check valve may be installed backwards. Check flow arrow
on valve body. Check shut-off valve. It may be closed.
3. Check vertical elevation. It may be higher than pump can
develop. (see pump curve)
4. Pump inlet may be plugged. Remove pump to check.
CAUTION: ALWAYS UNPLUG POWER CORDS ORTURN OFF ALL MAIN AND BRANCH CIRCUIT BREAK-
ERS BEFORE DOING ANYWORK ONTHE PUMP. If control panel is remote from pump, disconnect lead
wires to motor so that no one can turn the circuit breaker back on.

23833A245
7
TO REPLACE POWER CORD OR
AUTOMATIC CONTROL FLOAT
1. Use a wrench to loosen and remove thermoplastic
nut from the cap socket. Use your fingers to
pull and wiggle the cord end connector from the
socket.
2. To replace either the power cord or automatic
control float, align the half circle notch on the cord
end connector with the half circle key in the socket.
Press the connector into the socket all the way.
3. Slide the thermoplastic washer onto the top of the
cord end connector.
4. Screw the thermoplastic nut into the socket.
Tighten the nut snugly, but do not over tighten.
The nut may be tightened a little more after the
connector has set over a period of time.
5. If replacing automatic control float be sure to tether
float approximately 3-5/8”.
FOR SHAFT SEAL ONLY REPLACEMENT
1. Remove the six screws from top thermoplastic cap
and bump cap with plastic hammer to loosen.
2. Lay the cap back, do not disconnect wires from
the cap. Pour all the oil from the pump. If the old
seal failed there may be water in the oil and old oil
should be discarded.
3. Remove the eleven machine screws holding the
volute halves together. Separate lower half volute
from the upper half by using a rubber hammer
and/or prying lightly with a screwdriver.
4. Lay pump on its side. Place a flat screwdriver
in the slot in the bottom of the shaft and turn the
impeller counterclockwise to remove it from the
shaft. A blow from a rubber hammer may be
necessary to loosen the impeller.
5. Remove the rotating portion (carbon) of the
seal with pliers. Pry out the stationary portion
(ceramic) with a pair of slotted screwdrivers to
remove from volute casing. Discard the old seal
assembly parts. NEVER USE OLD SEAL PARTS,
REBUILD PUMPWITH ONLY NEW SEAL
ASSEMBLY.
6. Thoroughly clean the shaft and volute casing
with a clean cloth. If the drained oil showed signs
of water, then the motor should be air dried for
several days to remove any remaining moisture.
7. Remove the seal from the package being careful
not to touch the carbon or ceramic faces with
fingers or anything dirty. Add a film of oil to the
perimeter of the rubber cup holding the ceramic
and insert into the motor housing. Use a push tool
the same size as the ceramic face (a short piece
of PVC pipe works well).
8. With a clean dry cloth, wipe away any smudging or
oil from the seal faces. Add a film of new oil onto
the motor shaft. With the carbon facing towards
the ceramic, slide the rotating part onto the motor
shaft. Push it on far enough to attach impeller.
9. Screw the impeller clockwise onto the shaft using
a screwdriver to hold the shaft from turning and
tighten impeller. Use Loctite or equal on shaft
threads.
10. Place pump upright on top of lower volute half. Be
sure mating parts are together and reassemble the
eleven machine screws and tighten.
11. Check that the impeller turns freely.
12. Replace oil in motor housing using only Myers
submersible transformer oil. The oil should be
about 1/2” above the upper surface of the bearing
plate.
13. Reinstall the top thermoplastic cap, making sure
the o-ring is in position on the cap. Tighten the top
six screws snug, but do not overtighten.
14. Plug pump into receptacle to test operation. Pump
must run quiet and free of vibration.
TO REPLACE MOTOR STATOR HOUSING
ASSEMBLY AND SEAL
1. Stator assembly includes housing, stator, rotor
with shaft, thrust washers and metal bearing plate.
(See repair parts list)
2. Remove the six screws from top thermoplastic cap
and bump cap with plastic hammer to loosen.
3. Disconnect the four motor lead wires from the cap
pin terminals and remove cap. Pour all the oil from
the pump.
4. Remove the eleven machine screws holding the
volute halves together. Separate lower half volute
from the upper half by using a rubber hammer
and/or prying lightly with a screwdriver.

23833A245 8
5. Lay pump on its side. Place a flat screwdriver
in the slot in the bottom of the shaft and turn the
impeller counterclockwise to remove it from the
shaft. A blow from a rubber hammer may be
necessary to loosen the impeller. Discard old seal
part.
6. Remove the four flat head screws holding the
upper half of volute to housing. Note position of
discharge in relation to switch clamp.
7. To assemble the new ceramic seal seat into your
new stator housing assembly, clean the seat cavity
thoroughly and follow Steps 7 & 8 “For Shaft Seal
Only Replacement”. NEVER USE OLD SEAL
PARTS. USE ONLY COMPLETELY NEW SEALS.
8. Assemble the upper half of the volute to housing
with the four flat head screws. Position discharge
the same as before in relation to switch clamp.
9. Make sure the shaft surface is clean and lightly
oiled. Press by hand the rotating half of the shaft
seal onto the shaft. Be sure the rotating carbon
washer is positioned adjacent to the ceramic seat.
10. Screw the impeller clockwise onto the shaft using
a screwdriver to hold the shaft from turning and
tighten impeller. Use Loctite or equal on shaft
threads.
11. Place pump upright on top of lower volute half. Be
sure mating parts are together and reassemble the
eleven machine screws and tighten.
12. Check that the impeller turns freely.
13. Guide the four motor wires up through a common
hole in the bearing plate and place the protective
plastic tube over the four motor wires.
14. Position the o-ring into cap and reconnect the four
motor wires as shown in wiring diagram. The two
green ground wires connect to the pins nearest the
‘G’marked on the cap.
15. Put oil in the motor housing using only Myers
submersible transformer oil. The oil should be
about 1/2” above the surface of the bearing plate.
16. Reinstall the top thermoplastic cap, making sure
the o-ring is in position on the cap. Tighten the top
six screws snug, but do not overtighten.
17. Be sure the 1/8” NPT pipe plug is in the top cap.
18. Plug pump into receptacle to test operation. Pump
must run quiet and free of vibration.
NOTE: When replacing top cap with a new one, be
sure the jumper wire and pipe plug are in place. See
wiring diagram. Tether level control to motor housing
with float extended 3-5/8” to 4”.
WIRING DIAGRAM MOTOR REISTANCE CHART
Winding Locked
Resistance Max. Rotor
Model HP Speed V Ph in Ohms Amps Amps
ME40 4/10 1550 115 1 1.2 12.0 16.0
ME40 4/10 1550 230 1 4.3 6.0 8.2
ME40AG 4/10 1650 115 1 2.0 8.0 17.6
ME40AG 4/10 1650 230 1 9.1 4.0 8.8

23833A245
9
TYPICAL SECTION DRAWING FOR ME40 SERIES
Shaded Pole Motor

23833A245 10
TYPICAL SECTION DRAWING FOR ME40AG SERIES
PSC Motor

23833A245
11
Ref. No. Part
No. Description Req’d Numbers
1A Plug, nut (manual only) 1 24448A000
1B Washer (manual only) 1 05030A213
1C Plug, connector (manual only) 1 24449A000
2 Cord, electric 1 See Chart
3 Cap, motor (not stamped) 1 24431C000
4 Wire with terminals 1 09859A800
5 Capacitor (115 volt) 1 26446A000
5 Capacitor (230 volt) 1 23290A000
6 Cradle, capacitor (230 volt) 1 26298B000
7 O-Ring, 5-1/2 x 5-1/4 x 1/8 1 05876A146
8 Washer, spring wave 1 19331A011
9 Plate, bearing 1 24661B000
10 Oil, transformer (1 gal.) .2 gal. 11009A008
11 Housing, with rotor & stator 1 See Chart
Stator only 1 See Chart
Rotor & shaft, ME40 1 25309A000
Rotor & shaft, ME40AG 1 26166B000
Housing only 1 27313C000
PARTS LIST ME40/ME40AG
2 11 22
Pump Pump Housing
Catalog Engineering Pump Cord, Cord w/Rotor Stator Level
Number Numbers Type Electric Length & Stator Only Control
ME40A-11 25300D000 Automatic 21628B017 10’ 27313C010 21599B022 25798A550
ME40M-11 25300D001 Manual 21628B027 10’ 27313C010 21599B022 ---
ME40AC-11 25300D010 Automatic 21628B044 20’ 27313C010 21599B022 25798A550
ME40MC-11 25300D011 Manual 21628B044 20’ 27313C010 21599B022 ---
ME40AC-21 25300D012 Automatic 21628B019 20’ 27313C011 21599B023 25798A550
ME40MC-21 25300D013 Manual 21628B019 20’ 27313C011 21599B023 ---
ME40P-1 25300D900 Automatic 21628B041 10’ 27313C010 21599B022 21813B130
ME40PC-1 25300D901 Automatic 21628B044 20’ 27313C010 21599B022 21813B131
ME40PC-2 25300D903 Automatic 21628B019 20’ 27313C011 21599B023 21813B133
ME40AG-11 27234D001 Manual 21628B044 20’ 27313C012 26165B000 ---
ME40AG-21 27234D002 Manual 21628B043 20’ 27313C013 26165B001 ---
CHART
Ref. No. Part
No. Description Req’d Numbers
12 Seal, shaft 1 21607A015
13 Screw, machine, flat head 4 07597A030
14 Case, volute, upper half 1 25306D000
15 Screws, self tap #10 x 3/4 11 05910A012
16 Impeller 1 25301B900
16A Sealant, Loctite 242 1 14550A001
17 Case, volute, lower half 1 25307D001
18 Gasket, Vellumoid 1 25328C000
19 Ball bearing 1 000650241
20 Screws, hex head mach. 6 18475A003
21 Suction screen 1 25307A015
22 Level control 1 See Chart

23833A245 12
F. E. Myers, 1101 Myers Parkway, Ashland, OH 44805-1969
888-987-8677, FAX: [phone], www.femyers.com
Myers (Canada), 269Trillium Drive, Kitchener, Ontario N2G 4W5
519/748-5470, FAX: [phone]
LIMITED WARRANTY
F.E. MYERS warrants to the original consumer purchaser (“Purchaser” or “You”) of the products listed below,
that they will be free from defects in material and workmanship for the Warranty Period shown below.
Product Warranty Period
Sump/Sewage/Effluent Products 24 months from date of manufacture
Fibrewound Tanks 5 years from date of original installation
Steel Pressure Tanks 5 years from date of original installation
Jet pumps, small centrifugal pumps, whichever occurs first:
submersible pumps and related accessories 12 months from date of original installation, or
18 months from date of manufacture
Our warranty will not apply to any product that, in our sole judgement, has been subject to negligence,
misapplication, improper installation, or improper maintenance. Without limiting the foregoing, operating a
three phase motor with single phase power through a phase converter will void the warranty. Note also that
three phase motors must be protected by three-leg, ambient compensated, extra-quick trip overload relays of
the recommended size or the warranty is void.
Your only remedy, and F.E. MYERS’s only duty, is that F.E. MYERS repair or replace defective products (at
F.E. MYERS’s choice). You must pay all labor and shipping charges associated with this warranty and must
request warranty service through the installing dealer as soon as a problem is discovered. No request for
service will be accepted if received after the Warranty Period has expired. This warranty is not transferable.
F.E. MYERS SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR CONTINGENT
DAMAGES WHATSOEVER.
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND
IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE FOREGOING WARRANTIES
SHALL NOT EXTEND BEYOND THE DURATION EXPRESSLY PROVIDED HEREIN.
Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations on
the duration of an implied warranty, so the above limitations or exclusions may not apply to You. This warranty
gives You specific legal rights and You may also have other rights which vary from state to state.
This warranty supersedes and replaces all previous warranty publications.
F.E. MYERS
1101 Myers Parkway, Ashland, OH 44805-1989
Phone: [phone] • Fax: [phone] • www.femyers.com