MYERS MWH50, MW200, ME150, ME50 Installation And Service Manual

MWH50 - MW200 Series

ME50 - ME150 Series

Submersible Sump,
Effluent & Sewage Pumps

Installation and Service Manual

Single and double seal. Single and three phase power.

Single Seal Pump

ME50S, ME75S

ME100S, ME150S,

MWH50, MW100,

MW150, MW200

©2012 23833A278 (03/15/12)

Double Seal Pump

ME50D, ME75D

ME100D, ME150D,

MWH50D, MW100D,

MW150D, MW200D

Typical Section Drawing For ME/MW50-200 Single Seal Pumps

1

2

3

4

5

OIL LEVEL

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

26

27

21

22

2” NPT

23

24

25

28

2

Single Seal Repair Parts List

Ref. Description Qty. Part Numbers

1 Nut, cord plug, solid 1 25341A002

2 Washer, 1/32” Thk. 1 05030A234

3 Gasket, Rubber 1 05014A193

4 Washer, 3/32” Thk. 1 05030A235

5 Plug, 1/4” pipe 1 05022A009

6 Cord, Power 1 See Chart

7 Screw, drive 2 05160A004

8 Name Plate 1 N/A

9 Housing, Motor 1 25327D000

10 Capacitor (1Ph only) 1 See Chart

11 Clip, capacitor (1 Ph only) 1 See Chart

12 Oil, Transformer .8-1 gal 11009A006

12A Connectors (3 Ph only) 3-6 15781A001

13 Washer, bearing 1 19331A005

14 Bearing, ball, upper 1 08565A013

15 Screw, st, #10 x 3/8 2 09822A032

Unit manufactured prior to Aug-2007 contact factory for repair parts.

Item Number 6 10 11 16 & 17 23

HP Volts PH

115 1 25338B004
208 1
230 1 25338B005
208 3

1/2

460 3
575 3 25484D103
115 1 25338B000
208 1
230 1 25338B001
208 3

3/4

460 3
575 3 25484D103
208 1
230 1 25338B001 25484D105
208 3

1

460 3
575 3 25484D107
208 1
230 1 25338B001 25484D105
208 3

1-1/2

230 3
460 3
575 3
208 1
230 1 26520A000 25484D109
208 3

2

230 3
460 3
575 3 25484D112

Power Cord

W/Plug

Power Cord

No Plug

25338B006

25338B002 23839A000 20333A006

25338B003

25338A002 23838A000 20333A004

25338B003

25338B002 23838A000 20333A004

25338B003 25484D106

25338B009

25338B008

25338B003

Capacitor

23839A000 20333A006

23839A000

Capacitor

Clip

20333A006

Ref. Description Qty. Part Number

16 & 17 Stator, Rotor shaft with shell 1 See Chart

18 Bearing, ball, lower 1 08565A022

19 Seal, shaft 1 25370A000

20 Plate, brg & seal 1 25367D000

21 Gasket, tetraseal, 7x6-3/4x1/8 1 05014A181

22 Screw, cap, 5/16 x 1-1/4 8 19100A012

23 Impeller 1 See Char t

Case, volute (ME50) 1 25357D000

24

Case, volute (ME75-150) 1 25331D000

Case, volute (MWH5-200) 1 26057D000

Cup, U, HUVA (ME50-150) 1 22835A005

25

Cup, U, HUVA (MWH50-200) 1 22835A009

26 Washer, Impeller Retainer 1 05030A242

27 Screw, Machine #10 x 3/8 1 06106A042

28 Sealant 1 14550A001

Stator Rotor

& Shaft

Ass’y

25484D100

25484D101

25484D102230 3

25484D100

25484D101

25484D102230 3

25484D104

25484D106230 3

25484D104

25484D108

25484D110

25484D111

ME

Impeller

Plastic

25333B025 25348B121 26029B013 26029B113

25348B020 25348B120

25348B010 25348B110 26029B012 26029B112

25348B000 25348B100 26029B011 26029B111

Impeller

ME

Brass

MWH

Impeller

DI

26029B000 26029B100

MWH

Impeller

Brass

3

Typical Section Drawing For ME/MW50-200 Double Seal Pumps

1

2

3

4

5

6

7

21

8

9

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

2” NPT

4

28

29

30

25

26

27

Double Seal Repair Parts List

Ref. Description Qty. Part Number

1 Cord, Sensor 1 25339B000

2 Cord, Power 1 See Chart

3 Screw, drive 2 05160A004

4 Name Plate 1 N/A

5 Housing, Motor 1 25327D000

6 Capacitor (1Ph only) 1 See Chart

7 Clip, capacitor (1 Ph only) 1 See Chart

8 Plug, 1/4” pipe 1 05022A009

9 Oil, Transformer 1.12 gal 11009A006

9A Connectors (3 Ph only) 3-6 15781A001

10 Screw, st, #10 x 3/8 2 09822A032

11 Washer, bearing 1 19331A005

12 Bearing, ball, upper 1 08565A013

13 & 14 Stator, Rotor shaft with shell 1 See Chart

15 Wire, electrode 2 21792A004

16 Screw, #6 x 1/4 2 05434A025

17 Seal Probe 2 25343A000

Unit manufactured prior to Aug-2007 contact factory for repair parts.

Item Number 2 6 7 13 & 14 25

HP Volts PH

115 1 25338B004
208 1
230 1 25338B005
208 3

1/2

460 3
575 3 25484D203
115 1 25338B002
208 1
230 1 25338B001
208 3

3/4

460 3
575 3 25484D203
208 1
230 1 25338B001 25484D205
208 3

1

460 3
575 3 25484D207
208 1
230 1 25338B001 25484D205

1-1/2

208 3

460 3
575 3 25484D207
208 1
230 1 26520A000 25484D209
208 3

2

230 3
460 3
575 3 25484D212

Power Cord

W/Plug

Power Cord

No Plug

25338B006 23839A000 20333A006

25338B003

25338B002 23839A000 20333A006

25338B003

25338B002 23838A000 20333A004

25338B003

25338B002 23838A000 20333A004

25338B003

25338B009

25338B008

25338B003

Capacitor

23839A000

Capacitor

Clip

20333A006

Ref. Description Qty. Part Number

18 Bearing, ball, lower 1 08565A022

19 Seal, shaft 1 25370A000

Ring, retaining 2 12558A021

20

Ring, retaining 1 12558A033

21 Gasket, tetraseal, 7x6-3/4x1/8 2 05014A181

22 Housing seal 1 25369D000

23 Plate, bottom 1 25368D000

24 Screw, cap 5/16 x 1-1/4 12 19100A012

25 Impeller 1 See Chart

Case, volute (ME50) 1 25357D000

26

Case, volute (ME75-150) 1 25331D000

Case, volute (MWH50-200) 1 26057D000

Cup, U, HUVA (ME50-150) 1 22835A005

27

Cup, U, HUVA (MWH50-200) 1 22835A009

28 Washer, Impeller Retainer 1 05030A242

29 Screw, Machine #10 x 3/8 1 06106A042

30 Sealant 1 14550A001

Stator Rotor

& Shaft

Ass’y

25484D200

25484D201

25484D202230 3

25484D200

25484D201

25484D202230 3

25484D204

25484D206230 3

25484D204

25484D206230 3

25484D208

25484D210

25484D211

ME

Impeller

Plastic

25333B025 25348B121 26029B013 26029B113

25348B020 25348B120

25348B010 25348B110 26029B012 26029B112

25348B000 25348B100 26029B011 26029B111

ME

Impeller

Brass

MWH

Impeller

DI

26029B000 26029B100

MWH

Impeller

Brass

5

I mportant Safety

Instructions

SAVE THESE INSTRUCTIONS - This manual contains
important instructions that should be followed during
installation, operation, and maintenance of the product.
Save this manual for future reference.

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

indicates a hazard which, if not avoided, will

result in death or serious injury.

indicates a hazard which, if not avoided,

could result in death or serious injury.

indicates a hazard which, if not avoided,

could result in minor or moderate injury.
NOTICE

personal injury.

seal 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

• 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ifacontrolpanelisused.

• Alldoublesealpumps,allduplexinstallationsand

• Wh

All pumps have a GROUND WIRE that is connected to
a screw in the metal motor housing. This wire goes to
the receptacle or control box 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.

When overload current protection is provided by
installer:

USE WITH APPROVED MOTOR CONTROL

When motor has built-in overload protection:

USE WITH APPROVED MOTOR CONTROL

addresses practices not related to

Risk of electric shock. Pumps with a single

grounded, grounding-type receptacle.

all three phase pumps require a control box.

en 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).

THAT MATCHES MOTOR INPUT IN FULL LOAD
AMPERES WITH OVERLOAD ELEMENT(S)
SELECTED OR ADJUSTED IN ACCORDANCE
WITH CONTROL INSTRUCTIONS.

THAT MATCHES MOTOR INPUT IN FULL
LOAD AMPERES.

G eneral Description And

Application

Myers ME and MW series pumps are available in
both a single seal design and double seal design with
leak detector. The ME50-ME150 models are designed
for Effluent dosing, Septic Tank Effluent Pumping
(S.T.E.P.) or normal sump and general dewatering
applications where higher pressure is required. These
units are designed to handle ¾” spherical solids.
The MWH50-MW200 models are designed for raw
sewage applications and can pass 2” spherical solids.
These units can also be used for sump and general
dewatering applications where larger solids capabilities
are required.

When used in Effluent dosing or S.T.E.P. applications,
the pump must be installed in a separate tank or
compartment at the discharger side of the septic tank.

Never install pump in tank where sludge collects.

These pumps are available in single phase and three
phase, and either in single seal or double seal with seal
leak detector. All three phase units, all double seal units
and all duplex installations must be used with a control
box. All power cords and seal leak detector cords are
20 feet long.

The ME model impellers are enclosed two vane type to
handle ¾” spherical solids and are available made of
engineered thermoplastic or cast brass. All pumps have
a 2” NPT discharge tapping.

The MW model impellers are enclosed two vane non­clog style, designed to handle 2” spherical solids. The
MW pumps are available with standard cast iron or
optional cast brass impellers.

These pumps are NOT for use in swimming pools
or fountains.

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.

In installation of this type a 1/8” hole should be drilled
in the discharge pipe just above the pump discharge.
The check valve should be 12 to 18 inches above pump
discharge. Do not put check valve directly into pump
discharge opening. - follow local code.

Packaging

Each pump is packaged separately in a carton marked
with a catalog number and Myers engineering number.

Level Controls

All pumps must use sealed level control switches for
automatic operation. MLC and MFLC controls have
sealed switches that are 1 HP rated at 230 volts. ALC
and AWS-1 controls have sealed mechanical switches
that are rated 2 HP at 230 volts.

6