BJM Pumps LWA Series Instruction manual

Version 3-8-2016
INSTALLATION, OPERATION & MAINTENANCE MANUAL
LWA SERIES/LWAE SERIES
TOP DISCHARGE
Electric Submersible Pumps
Single Phase
230V
Three Phase
230V, 460V & 575V
CAST IRON w/ STAINLESS SHELL
SINGLE PHASE
THREE PHASE
LWA1500
LWA2200
LWA15
LWA22
LWA37
LWA55
LWA55H
LWA75
LWA75H
LWAE15
LWAE22
LWAE37
Read this manual carefully before installing, operating or servicing these pump models.
Observe all safety information. Failure to comply with instructions may result in personal
injury and/or property damage. Please retain these instructions.

TABLE OF CONTENTS
INTRODUCTION............................................................................................................................................................4
SAFETY.........................................................................................................................................................................4
INSPECTION.................................................................................................................................................................5
PRE-INSTALLATION INSPECTION .........................................................................................................................5
OIL FILL QUANTITY/TYPE.......................................................................................................................................6
PUMP INSTALLATION .............................................................................................................................................6
POSITIONING THE PUMP .......................................................................................................................................7
PUMP ROTATION ....................................................................................................................................................8
PUMP OPERATION.......................................................................................................................................................9
TYPICAL MANUAL DEWATERING INSTALLATION.....................................................................................................9
STOPPING..............................................................................................................................................................10
TYPICAL AUTOMATIC DEWATERING INSTALLATION ............................................................................................10
STOPPING..............................................................................................................................................................11
INTENDED METHODS OF CONNECTION.................................................................................................................11
SINGLE & THREE PHASE WIRING INSTRUCTIONS ...........................................................................................12
TROUBLE SHOOTING................................................................................................................................................13
PUMP WILL NOT RUN ...........................................................................................................................................13
PUMP RUNS BUT DOES NOT DELIVER RATED CAPACITY...............................................................................13
SERVICING YOUR SUBMERSIBLE PUMP............................................................................................................14
MAINTAINING YOUR PUMP..................................................................................................................................14
CHANGING SEAL OIL............................................................................................................................................15
DISASSEMBLY/ASSEMBLY PROCEDURE FOR LWA TO REVIEW/REPLACE THE MECHANICAL SEAL ........15
EXPLODED VIEW LWA1500 & 2200 ..........................................................................................................................17
EXPLODED VIEW LWAE15,22 ...................................................................................................................................20
EXPLODED VIEW LWA37...........................................................................................................................................21
EXPLODED VIEW LWAE37 ........................................................................................................................................22
EXPLODED VIEW LWA55...........................................................................................................................................23
EXPLODED VIEW LWA55H........................................................................................................................................24
EXPLODED VIEW LWA75...........................................................................................................................................25
EXPLODED VIEW LWA75H........................................................................................................................................26
LWA SERIES PARTS LIST..........................................................................................................................................27
LWAE SERIES PARTS LIST .......................................................................................................................................29
SINGLE PHASE WIRING DIAGRAM 230V .................................................................................................................31
THREE PHASE WIRING DIAGRAM 230V DUAL VOLTAGE......................................................................................32
THREE PHASE WIRING DIAGRAM 460V DUAL VOLTAGE......................................................................................33
MODELS LWA15-75H........................................................................................................................................33
WARRANTY AND LIMITATION OF LIABILITY............................................................................................................35
START-UP REPORT FORM........................................................................................................................................36
NOTES:........................................................................................................................................................................39

4
INTRODUCTION
This Installation, Operation and Maintenance manual provides important information on
safety and the proper inspection, disassembly, assembly and testing of the BJM
Pumps® LWA® Series submersible pump. This manual also contains information to
optimize performance and longevity of your BJM Pumps submersible pump.
The submersible LWA Series pumps are designed to pump water and light water
slurries. The LWA Series pumps are not explosion-proof. They are not designed
to pump volatile or flammable liquids.
Note: Consult chemical resistance chart for compatibility between pump
materials and liquid before operating pump.
If you have any questions regarding the inspection, disassembly, assembly or testing
please contact your BJM Pumps distributor, or BJM Pumps, LLC.
BJM Pumps, LLC
123 Spencer Plain Rd.
Old Saybrook, CT 06475, USA
Fax: [phone]
Phone: [phone]
Phone: [phone]
Information, including pump data sheets and performance curves, is also available on
our web site: www.bjmpumps.com
For assistance with your electric power source, please contact a certified electrician.
Please pay attention to the following alert notifications. They are used to notify
operators and maintenance personnel to pay special attention to procedures, to avoid
causing damage to the equipment, and to avoid situations that could be dangerous to
personnel.
NOTE: Instructions to aid in installation, operation, and maintenance or which
clarify a procedure.
Immediate hazards that WILL result in severe personal injury or
death. These instructions describe the procedure required and the injury which will
result from failure to follow the procedure.
Hazards or unsafe practices that COULD result in severe personal
injury or death. These instructions describe the procedure required, and the injury which
could result from failure to follow the procedure.
Hazards or unsafe practices which COULD result in personal injury
or product or property damage. These instructions describe the procedure required and
the possible damage which could result from failure to follow the procedure.

4
SAFETY
Pump installations are seldom identical. Each installation and application can vary due
to many different factors. It is the owner/service mechanics responsibility to repair,
service, and test to ensure that the pump integrity is not compromised according to this
manual.
Risk of electric shock –this pump has not been investigated for use
in swimming pool areas.
Do not pump flammable or volatile liquids. Death or serious
injury will result.
Before attempting to open or service the pump:
1) Familiarize yourself with this manual.
2) Unplug or disconnect the pump power cable to ensure that the pump will remain
inoperative.
3) Allow the pump to cool if overheated.
Do not operate the pump with a worn or damaged electric power
cable. Death or serious injury could occur.
Never attempt to alter the length or repair any power cable with a
splice. The pump motor and and cable must be completely waterproof. Damage to the
pump or personal injury may result from alterations.
After the pump has been installed, make sure that the pump and all
piping are secure before operation.
Do not lift the pump by the power cable piping or discharge hose.
Attach proper lifting equipment to the lifting handle (or lifting rings) fitted to the pump. Do
not suspend the pump by the power cable.
Obtain the services of a qualified electrician to troubleshoot, test
and/or service the electrical components of this pump.
Pumps and related equipment must be installed and operated
according to all national, local and industry standards/codes.

5
INSPECTION
Review all safety information before servicing pump.
The following are recommended installation practices/procedures for the pump. If there
are questions in regards to your specific application, contact your local BJM Pumps
distributor or BJM Pumps, LLC.
PRE-INSTALLATION INSPECTION
1) Check the pump for damage that may have occurred during shipment.
2) Inspect the pump for any cracks, dents, damaged threads, etc.
3) Check power cord for any cuts or damage.
4) Check for, and tighten any hardware that appears loose.
5) Carefully read all tags, decals and markings on the pump.
If anything appears to be abnormal, contact your BJM Pumps distributor or BJM
Pumps, LLC. If damaged, the pump may need to be repaired before use. Do not install
or use the pump until appropriate action has been taken.
BJM Pumps Recommended Storage Procedures
Storage Environment
The storage environment must be between 40°F –120°F. DO NOT allow the
pump to freeze.
The pump must be stored in a dry location.
Avoid storing the pump in direct sunlight.
For Storage Periods of 3 Years or Less
Rotate the impeller shaft by hand every 6 months and again prior to start up
- Keeps seal faces from sticking
- Keeps bearing grease from settling
Check the oil in seal chambers prior to startup to ensure oil is moisture free and
has not broken down.
Megger the motor prior to start up. The reading should be above 100Ω.
Remove the air check screw on the motor housing. Using and air compressor,
pressurize the motor chamber to 13 psi and check for leaks using a spray bottle.
Repeat this procedure to check the seal chamber for leaks.
Inspect the power cable for any damage.
For Storage Periods Longer Than 3 Years
Disassemble the pump and replace all of the O-rings, the Mechanical Seal, Seal
Chamber Oil, and the Lip Seal. Replace the Bearings.

6
Remove the air check screw on the motor housing. Using an air compressor,
pressurize the motor chamber to 13 psi and check for leaks using a spray bottle
of soapy water. Repeat this procedure to check the seal chamber for leaks.
Rotate the impeller shaft by hand prior to startup.
Lubrication:
No additional lubrication is necessary. The shaft seal and bearings are fully lubricated
from the factory. Seal oil should be checked once per year. See table below.
OIL FILL QUANTITY/TYPE
Pump Models
Qty. oil in seal chamber
Type of oil
(U.S. fl. oz.)
Metric C.C.
LWA1500
21
620
ISO 32 NSF Food Grade Mineral Oil
LWA15
21
620
ISO 32 NSF Food Grade Mineral Oil
LWA2200
21
620
ISO 32 NSF Food Grade Mineral Oil
LWA22
21
620
ISO 32 NSF Food Grade Mineral Oil
LWA37
21
620
ISO 32 NSF Food Grade Mineral Oil
LWA55, LWA55H
28.8
850
ISO 32 NSF Food Grade Mineral Oil
LWA75, LWA75H
28.8
850
ISO 32 NSF Food Grade Mineral Oil
LWAE15
16.9
500
ISO 32 NSF Food Grade Mineral Oil
LWAE22
16.9
500
ISO 32 NSF Food Grade Mineral Oil
LWAE37
16.9
500
ISO 32 NSF Food Grade Mineral Oil
PUMP INSTALLATION
LWA Series pumps have been evaluated for use with water or water based solutions.
Please contact the manufacturer for additional information.
Risk of electric shock. All LWA Pump models; do not come with
electric plug connectors. To reduce the risk of electric shock, be certain that it is
connected only to a properly grounded, grounding-type receptacle or terminal box
control.
Lifting:
Attach a rope or lifting chain (not included) to the handle (or lifting rings) on the top of
the pump.
Do not lift the pump by the power cable or discharge hose/piping.
Proper lifting equipment (rope/chain) must be used.

7
POSITIONING THE PUMP
BJM Pumps, LWA Series pumps are designed to operate fully or partially submerged.
Do not run the pump dry. Refer to data sheet for minimum submersion depth for your
particular model. Data sheets can be obtained online at www.bjmpumps.com or by
calling BJM Pumps, LLC at 860-399-5937. As a general rule, LWA Series top discharge
pumps can pump down to a level above the suction screen. Pumping lower than screen
will permit air to enter the pump and cavitate, lose prime or become air bound.
Do not run the pump dry.
Pump liquid should not exceed a maximum temperature of 104°F.
Never place the pump on loose or soft ground. The pump may sink, preventing
water from reaching the impeller. Place on a solid surface or suspend the pump
with a lifting rope/chain. The LWA Series pumps are provided with a suction
strainer to prevent large solids from clogging the impeller. Any spherical solids
which pass through the strainer should pass through the pump.
For maximum pumping capacity, use the proper size non-collapsible hose or rigid
piping. A check valve may be installed after the discharge to prevent back flow
when the pump is shut off.

8
PUMP ROTATION
Two ways to check the correct pump rotation:
1. By looking at the impeller; the rotation of the impeller should be counter
clockwise as shown in the picture below.
2. By looking from the top of the pump. Since the impeller cannot be seen, the best
way to check the rotation is to check the kick back motion of the pump when the
pump just starts. The kick back motion of the pump should be counter clockwise
as shown in the picture below.

9
PUMP OPERATION
This pump is designed to handle dirty water that contains some
solids. It is not designed to pump volatile or flammable liquids. Do not attempt to pump
any liquids which may damage the pump or endanger personnel as a result of pump
failure.
Do not operate this pump where explosive vapors or
flammable material exist. Death or Serious injury will result.
TYPICAL MANUAL DEWATERING INSTALLATION
NOTE: Maximum recommended starts should not exceed 10 times per hour.
LWA models are provided with a 50’ (10 m) power cord. NEVER splice the power cable
due to safety and warranty considerations. Always keep the power supply connection
end dry.
Note: 230V, single phase and 230V, 460V & 575V three phase units do not have a
plug and have to be provided separately or connection made to a proper
termination control box.
Typical 3 phase manual control 1
Do not alter the length or repair any power cable with a splice. The
pump motor and cable must be completely waterproof. Damage to the pump or
personal injury may result from alterations.
For manual operation: Attach the proper plug or connect directly to the power source or
control box. Check the direction of the rotation on 3 phase models. Tilt the pump and
start it. It should twist in the opposite direction of the arrow (on pump). It is

10
recommended that a Ground Fault Interrupter (GFI) type receptacle (or equivalent) be
used.
STOPPING
To stop the pump (manual and automatic mode), turn off the breaker, or turn the power
source off (generator).
TYPICAL AUTOMATIC DEWATERING INSTALLATION
NOTE: Maximum recommended starts should not exceed 10 times per hour.
All LWA Pumps require a separate control box with float(s) for automatic
operation.

11
STOPPING
To stop the pump (manual and automatic mode), turn off the breaker, or turn the power
source off (generator).
INTENDED METHODS OF CONNECTION
Use with approved motor control that matches motor input in full
load amperes. “UTILLISER UN DÉMARREAR APPROUVÉ CONVENANT AU
COURANT Á PLEINE CHARGE DU MOTEUR.”
Use with approved motor control that matches motor input in full load amperes with
overload element(s) selected or adjusted in accordance with control instructions.
“UTILISER UN DÉMARREUR APPROUVÉ CONVENANT AU COU
RANT Á PLEINE CHARGE DU MOTEUR ET DON’T LES ÉLÉMENTS THERMIQUES
SONT RÉGLÉS OU CHOISIS ONFORMÉMENT AUX INSTRUCTIONS QUI
L’ACCOMPAGNENT”

12
SINGLE & THREE PHASE WIRING INSTRUCTIONS
FOR YOUR PROTECTION, ALWAYS DISCONNECT PUMP
FROM ITS POWER SOURCE BEFORE HANDLING.
“Risk of electrical shock” Do not remove power supply cord and
strain relief or connect conduit directly to the pump.
Installation and checking of electrical circuits and hardware should
be performed by a qualified licensed electrician.
To automatically operate a non-automatic LWA pump, a control panel is required.
Follow the instructions provided with the panel to wire the system. For automatic three
phase pumps see automatic three phase wiring diagram.
Typical 3 phase Auto Control 1
Before installing a pump, check the pump rotation to insure that wiring has been
connected properly to power source; and that the green lead of power cord (See wiring
diagram) is connected properly. LWA three phase models are supplied with two

13
grounding wires; one green for grounding to the panel; the other is orange and is to be
used for grounding check systems or can be also connected to the grounding point on
the control. Once connections are validated, momentarily energize the pump, observing
the directions of kick back due to starting torque. Rotation is correct if kick back is in the
opposite direction of rotation arrow on the pump casing. If rotation is not correct,
switching of any two power leads other than ground will provide the proper rotation.
The single phase and non-CSA approved models of LWA pumps have integral motor
overload protection. The CSA approved models do not have an integral motor overload,
and require overload protection in the motor control. It is recommended that all LWA
pumps use a motor starting device also incorporate motor overload protection. Pumps
must be installed in accordance with the National Electrical Code and all applicable
local codes and ordinances. Pumps are not to be installed in locations classified as
hazardous in accordance with National Electrical Code, ANSI/NFPA 70.
Connect pump to a junction box, outlet box, control box, enclosure with a wiring
compartment that meets NEC and local codes. The provision for supply connection
shall reduce the risk of water entry during temporary, limited submersion and shall
comply with the applicable requirements of the Standard for Enclosures for Electrical
Equipment, UL 50, or the standard for Metallic Outlet Boxes, UL 514A, and the standard
for Motor-Operated Water Pumps. UL 778.
TROUBLE SHOOTING
Disconnect the power source to the pump BEFORE attempting
any type of trouble shooting, service or repair.
PUMP WILL NOT RUN
1. Check power supply (fuses, breaker). Reset power.
2. Blocked impeller. Remove strainer, check and clean.
3. Defective cable or incorrect wiring.
4. Strainer clogged. Check and clean as necessary.
5. Float switch tangled/obstructed. Clean and free float switch from obstruction.
6. Float switch defective. Replace float switch.
7. Pump overheated or temperature of liquid exceeds pump operating
temperature.
Warning: Pump will restart automatically when motor over-heat protection switch
cools.
PUMP RUNS BUT DOES NOT DELIVER RATED CAPACITY
1. Discharge line clogged, restricted or hose kinked. Check discharge hose/pipe.
2. Worn impeller and/or suction cover. Inspect and replace as necessary.

14
3. Pump overloaded due to liquid pumped being too thick.
4. Pumping air. Check liquid level and position of pump.
5. Excessive voltage drops due to long cables.
6. Three phase only; pump running backwards, check rotation.
SERVICING YOUR SUBMERSIBLE PUMP
Pump should be disconnected from the electric power supply before proceeding to do
any service or maintenance.
To service or repair your pump, please contact your local BJM Pumps distributor.
Service should only be performed by a qualified electrician.
MAINTAINING YOUR PUMP
Pump should be disconnected from the electric power supply before proceeding
to do any service or maintenance.
Pump should be inspected at regular intervals.
More frequent inspections are required if the pump is used in a harsh
environment.
Preventative maintenance should be performed to reduce the chance of
premature failure.
Worn impellers and lip seals should be replaced.
Cut or cracked power cords must be replaced. (Never operate a pump with a
cut, cracked or damaged power cord.)
Seal oil should be checked at least once per year.
Maintenance should always be done when taking a pump out of service before
storage.
1) Clean pump of dirt and other build up.
2) Check condition of oil around the shaft seals.
3) Check hydraulic parts: check for wear.
4) Inspect power cable. Make sure that it is free of nicks or cuts.

15
CHANGING SEAL OIL
Checking the seal chamber by following step one of the disassembly/assembly
procedures listed below. To change the seal chamber oil, drain the oil by removing drain
plug (55). Replace with the proper amount of ISO 32 NSF Food Grade Mineral Oil. Note
that a 10-15% air gap should be maintained in the seal chamber to allow for heat
expansion.
DISASSEMBLY/ASSEMBLY PROCEDURE FOR LWA TO REVIEW/REPLACE THE
MECHANICAL SEAL
1. Remove drain plug (55) from the seal housing (26) and take a sample of the oil. If
the oil is clear and shows no signs of water, then replace the drain plug. No
further inspection or disassembly is necessary until the next service period is
reached.
2. If the oil is milky and shows signs of water and/or other contaminants, then the
mechanical seal should be replaced. Proceed with draining the oil into a catch
basin for proper disposal.
3. Remove the suction strainer/stand (31) from the bottom of the pump by removing
the four retaining cap screws.
4. Remove the suction/wear plate (28) and O-Ring (47) by removing the four cap
screws that retain this.
5. Remove the agitator (39) by turning the agitator counter clockwise to the shaft. If
the agitator is difficult to turn, a plastic mallet or hammer and block of wood can
be used to strike against the agitator blades to break it loose from the shaft.
6. Remove the retaining nut by holding the impeller or shaft. Not do not damage the
shaft.
7. Remove the impeller (27) by sliding it off of the shaft with the shaft key (46). Take
note of any shims that are placed behind the impeller, these will need to be
reinstalled during assembly.
8. Remove the seal housing (26) by removing the four retaining cap screws. Note
that some residual oil will be found in the chamber.
9. Once the seal housing has been removed, remove all of the old seal parts. This
will require the removal of the stationary seal clamping ring and retaining screws.
10.Clean all parts and inspect for any damage. It is recommended that O-Rings and
lip seals be replaced when replacing the mechanical seal assembly (21).
11.Lubricate the cup of the stationary seal with a light amount of the FM32 oil. Using
a pushing tool (PVC pipe), press the stationary seal into the pocket. Repeat this
step for both the upper and lower stationary seal.

16
12.Lubricate the lip seal (25) with oil, and press this into the bore on the opposite
side of the lower stationary seal, using the proper pressing tool.
13.Lubricate the shaft with a light coating of FM32 oil. Using a pushing tool, press
the rotating element for the upper seal onto the shaft and down to the point of
contact with the stationary seal. Add the spring. Re-lubricate the shaft with a light
amount of oil and install the lower rotating element onto the shaft using a pushing
tool.
14.With all O-Rings in place, replace the seal housing and retain with the four cap
screws.
15.At this time the seal chamber should be able to be air checked. With the proper
gauge set up, apply 10 PSIG (do not add more that 10 PSIG of air pressure). No
pressure drop should be seen in five minutes under air pressure. The shaft
should be rotated a few times during this testing to insure that the mechanical
seals are operating properly.
16.Fill the seal oil chamber with the proper amount of FM 32 NSF approved oil. Note
that a 10-15% air gap should be maintained in the seal chamber to allow for heat
expansion.
17.The impeller (27) with shims and the shaft key (46) can be placed onto the shaft
and secured with the retaining nut and lock washer.
18.The suction wear plate (28), agitator (39) and suction strainer/stand can be
replaced and tightened down properly.

17
EXPLODED VIEW LWA1500 & 2200

18
EXPLODED VIEW LWAE1500 & 2200

19
EXPLODED VIEW LWA15, 22