LEO PUMP LSTEP512M Submersible Effluent Pumps Owner’s Manual

: July 29, 2024
: LEO PUMP

Table of Contents

LEO PUMP LSTEP512M Submersible Effluent Pumps
Product Information
Product Usage Instructions
General Safety
Recommendations and Warnings
Installation & Service
Repair Parts
Troubleshooting Chart
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LEO PUMP LSTEP512M Submersible Effluent Pumps

Specifications

Brand: LEO PUMP US, INC
Model Variants: LSTEP512M, LSTEP512T, LSTEP522M,
LSTEP1022M
Address: 731 Bradfield Road, Houston, TX 77060
Email: infous@leopump.com

Product Information

The Submersible Effluent Pumps from LEO PUMP US, INC are designed to efficiently pump effluent water from various applications.

Product Usage Instructions

Installation

Ensure the power source is disconnected before installation. Select an appropriate location in the effluent area for the pump.
Securely place the pump in the designated spot ensuring it is fully submerged.
Properly connect the pump to the power source following the provided wiring instructions.

Operation

Turn on the power source after installation is complete.
Monitor the pump to ensure it is functioning correctly and efficiently.
Regularly check for any clogs or obstructions in the pump to maintain optimal performance.

IMPORTANT! – Read all instructions in this manual before operating or servicing a pump.

General Safety

Information Before installation, read the following instructions carefully. Failure to follow instruction and safety information could cause serious bodily injury, death and/or property damage. Each LEO product is carefully inspected to insure. Proper performance. Closely following these instructions will eliminate potential operating problems, assuring years of trouble-free service.

DANGER “Danger” indicates an imminently hazardous situation which, if not avoided, WILL result in death or serious injury.
WARNING “Warning” indicates an imminenty hazardous situation which, if not avoided, MAY result in death or serious injury.
CAUTION “Caution” indicates a potentially hazardous situation which, if not avoided, MAY result in minor or moderate injury.
IMPORTANT! – LEO Pumps is not responsible for losses, injury or death resulting from failure to observe these safety precautions, misuse, abuse or misapplication of pumps or equipment.

ALL RETURNED PRODUCTS MUSTBE CLEANED, SANITIZED, OR DECONTAMINATED PRIOR TO SHIPMENT, TO INSURE EMPLOYEES WILL NOT BE EXPOSED TO HEALTH HAZARDS IN HANDLING SAID MATERIAL. ALL APPLICABLE LAWS AND REGULATIONS SHALL APPLY.

WARNING Installation, wiring, and junction connections must be in accordance with the National Electric Code and all applicable state and local codes. Requirements may vary depending on usage and location.
WARNING Installation and servicing is to be conducted by qualified personnel only.

DANGER Keep clear of suction and discharge openings. Do not insert fingers in pump with power connected; the impeller can cause serious injury. Always wear eye protection when working on pumps. Do not wear loose clothing that may become entangled in moving parts. Pumps build up heat and pressure during operation. Allow time for pumps to cool before handling or servicing the pump or any accessory i tems associated with or near the pump.

DANGER This pump is not intended for use in swimming pools or water installations where there is human contact with pumped fluid.
DANGER Risk of electric shock. To reduce risk of electric shock, always disconnect pump from power source before handling any aspect of the pumping system. Lock out power and tag.
WARNING Do not use these pumps in water over 104° F. Do not exceed manufacturers recommended maximum performance, as this could cause the motor to overheat.
DANGER Do not lift, carry or hang pump by the electrical cables. Damage to the electrical cables can cause shock, burns or death. Never handle connected power cords with wet hands. Use appropriate lifting device.
WARNING Sump and sewage pumps often handle materials which could cause illness or disease. Wear adequate protective clothing when working on a used pump or piping. Never enter a basin after it has been used.
DANGER Failure to permanently ground the pump, motor and controls before connecting to power can cause shock, burns or death.

Model Number: Serial: ____ Amps: _
Voltage: Phase: __ HP: _

DISCHARGE: 2″ NPT, vertical.
SPHERICALSLD HNDLG: 3/4″
LIQUID TEMPERATURE: 104° F(40°C) continuous
VOLUTE: Cast iron ASTM A-48 class 30.
Cast iron ASTM A-48 class 30.
Cast iron ASTM A-48 class 30.
SEALPLATE: Single vane enclosed. Polypropylene with stainless
SHAFT: steel insert
O-RINGS: Stainless steel.
PAINT: Square shaped Buna-N. Air dry enamel, water based.
SEAL: Outboard single mechanical, oil filled chamber. carbon/ ceramic/ Buna-N, with stainless steel hardware. 300 series stainless steel.
HARDWARE 300 series stainless steel
CORD ENTRY: 20 ft of neoprene cord, sealed against moisture. Ball, single row, oil lubricated.
BEARINGS: Ball, single row, oil lubricated.
MOTOR: NEMA L, single phase, permanent split capacitor, oil filled, with overload protection in motor.
OPTIONAL EQUIPMENT: Additional cord, seal material, impeller trims, slide rail coupling(SRC-2).

Recommendations and Warnings

Receiving inspection
Upon receiving the pump, it should be inspected for damage or shortages. If damage has occurred, file a claim immediately with the company that delivered the pump. If the manual is removed from the packaging, do not lose or misplace.

Storage
Any product that is stored for a period longer than six (6) months from the date of purchase should be bench tested prior to installation. A bench test consists of, checking the impeller to assure it is free turning(and switch if provided) operate properly.

Controls
Manual models require a separate approved pump control device or panel for automatic operation. Be sure the electrical specification of the control selected properly match the electrical specifications of the pump.

Submergence
The pump should always be operated in the submerged condition. The minimum sump liquid level should never be less than above the pump’s volute (See Figure 1).

Level Control Basic instructions:
Plug the level control plug into the GFI receptacle, then plug the pump into the piggy-back plug (See Figure 3). One cycle of operation should be observed, so that any potential problems can be corrected. It is recommended that the level control float should be set to insure that the liquid in the sump never drops below the top of the motor housing or a minimum level of 6 inches above the basin floor.

Installation
These pumps are recommended for use in a sump or basin. The sump or basin shall be sealed and vented in accordance with local plumbing codes, This pump is designed to pump effluent or wastewater, nonexplosive and noncorrosive liquids and shall NOT be installed in locations classified as hazardous in accordance with the National Electrical Code (NEC) ANSINFPA 70 or Canadian Electric Code (CEC). The pump should never be installed in a trench, ditch, or hole with a dirt bottom. The legs will sink into the dirt and the suction will become plugged. The installation should be at a sufficient depth to ensure that all plumbing is below the frost line. If this is not feasible, remove the check valve and size the basin to accommodate the additional backflow volume.

Discharge Piping
Discharge piping should be as short as possible and sized no smaller than the pump discharge. Do not reduce the discharge pipe size below that which is provided on the pump.

Installation & Service

Both a check valve and a shut-off valve are recommended for each pump. The check valve is used to prevent backflow into the sump. The shut-off valve is used to manually stop system flow during pump servicing.

Electrical Connections
Power cable

The power cable mounted to the pump must not be modified in any way. This pump is provided with a 3 wire cord and 3 prong grounded plug that must be connected into a 3 wire grounded Ground Fault receptacle. Do not bypass grounding wires or remove ground prongs from plug. This pump requires separate, properly fused and grounded branch circuit. Use of a ground fault circuit interrupter (GFCI) is strongly recommended. The electrical outlet or panel shall be within the length limitations of the pump power cord, and at least 4 feet above floor level to minimize possible hazards from flood conditions. Do Not use an extension cord.
IF USED with Control Panel – Any splice between the pump and the control panel must be made in accordance with the electric codes. It is recommended that a junction box, if used, be mounted outside the sump or be of at a minimum NEMA 4 construction if located within the wet well. DO NOT USE THE POWER CABLE TO LIFT PUMP.

Always rely upon a Certified Electrician for installation. Overload Protection: Single Phase – The stator in-winding overload protector used is referred to as an inherent overheating protector and operates on the combined effect of temperature and current. This means that the overload protector will trip out and shut the pump off if the windings become too hot, or the load current passing through them becomes too high.
IMPORTANT! – The overload will then automatically reset and start the pump up after the motor cools to a safe temperature. In the event of an overload, the source of this condition should be determined and corrected immediately.

WARNING
DO NOT LET THE PUMP CYCLEOR RUN IF AN OVERLOAD CONDITION OCCURS. If current through the temperature sensor exceeds the values listed, an intermediate control circuit relay must be used to reduce the current or the sensor will not work properly.

Wire Size
If longer power cable is required consult a qualified electrician for proper wire size.

Pre-Operation

Check Voltage and Phase – Compare the voltage and phase information stamped on the pump nameplate.
Check Pump Rotation – Improper motor rotation can result in poor pump performance and can damage the motor and/or pump. Incorrect rotation for Single-Phase pumps is unlikely. If the rotation is incorrect contact factory.
Name Plate – Record the information from the pump name plate to drawing in front of manual for future reference.
Insulation Test -An insulation (megger) test should be performed on the motor.
Before the pump is put into service. The resistance values (ohms) as well as the voltage (volts) and current (amps) should be recorded.
Pump-Down Test – Be sure pump has been properly wired, lowered into the basin, sump or lift station, check the system by filling with liquid and allowing the pump to operate through its pumping cycle. The time needed to empty the system, or pump-down time along with the volume of water, should be recorded.

Maintenance
No lubrication or maintenance is required. Perform the following checks when pump is removed from operation or when pump performance deteriorates:

Inspect motor chamber for oil level and contamination.
Inspect impeller and body for excessive build-up or clogging.
Inspect motor, bearings and shaft seal for wear or leakage.

Servicing
Cooling Oil -Anytime the pump is removed from operation, the cooling oil in the motor housing should be checked visually for oil level and contamination.
To check oil, set unit upright. Remove pipe plug from housing. With a flashlight, visually inspect the oil in the housing to make sure it is clean and clear, light amber in color and free from suspended particles. Milky white oil indicates the presence of water. Oil level should be just above the motor when pump is in vertical position.

Oil Testing

Drain oil into a clean, dry container by placing pump on it’s side, remove pipe plug, from housing.
Check oil for contamination using an oil tester with a range to 30 kilovolts breakdown.
If oil is found to be clean and uncontaminated(measuring above 15 kV breakdown), refill the housing.
If oil is found to be dirty or contaminated (or measures below15 kV breakdown), the pump must be carefully inspected for leaks at the shaft seal, cable assembly, square ring and pipe plug, before refilling with oil. To locate the leak, perform a pressure test.
After the leak is repaired, dispose of old oil properly, and refill with new oil.
Pressure Test (If oil has been drained) – Remove pipe plug from housing.
Apply pipe sealant to pressure gauge assembly and tighten into hole. Pressurize motor housing to 10 PSI. Use soap solution around the sealed areas and inspect joints for “air bubbles”.

After leak is repaired, dispose of old oil properly, and refill with new oil. Pressure builds up extremely fast, increase pressure by “TAPPING” air nozzle. Too much pressure will damage seal. DO NOT exceed 10 PSI.
Oil Replacement – Set unit upright and refill with new cooling oil as per table below. Fill to just above motor, but below capacitor as an air space must remain in the top of the housing to compensate for oil expansion. Apply pipe thread compound to threads of pipe plug then assemble to housing.
DO NOT overfill oil. Overfilling of housing with oil can create excessive and dangerous hydraulic pressure which can destroy the pump and create a hazard.
Overfilling oil voids warranty.

Disassembly
Impeller and Volute

Disconnect power.
Remove cap screws, volute and gasket.
Clean and examine impeller, for cracks or breakage and replace if required To remove impeller, place a flat screwdriver in the slot of the end of the shaft to hold the shaft stationary while unscrewing.
Check v-ring and remove if damaged.
Power Cord and Motor:
Remove pipe plug and drain oil from housing.
Remove gland nut, washer and nylon housing from motor housing. Pull cord through and disconnect the wires from the terminals on power cord.
Remove screws and washers and lift motor housing and stator from seal plate.
Remove o-ring, replace if damaged.
Check motor capacitor with an Ohm meter by first grounding the capacitor by placing a screwdriver across both terminals and then removing screwdriver. Connect Ohm meter (set on high scale) to terminals. If needle moves to infinity (∞0) then drifts back, the capacitor is good. If needle does not move or moves to infinity (ex›) and does not drift back, replace capacitor.
Inspect motor winding for shorts and check resistance values. Check rotor for wear. If rotor or the stator windings are defective, the complete motor must be replaced.
Shaft Seal:
Remove snap ring from seal plate. Remove shaft and motor rotor from seal plate.
Remove seal’s rotating member, spring and retaining ring from seal plate. Examine all seal parts, if seal faces show signs of wear, uneven wear pattern, chips or scratches replace entire seal. DO NOT interchange seal components, replace the entire shaft seal. If replacing seal, remove stationary by prying out with flat screwdrive.
Bearings:
Examine lower bearing, and upper bearing, if replacement is required, remove by using a wheel puller.

Reassembly
IMPORTANT! -All parts must be clean before reassembly. Handle seal parts with extreme care. DO NOT damage lapped surfaces.

Bearings

Press bearings and onto shaft.
Shaft Seal:
Clean seal cavity in seal plate and oil. Press seal’s stationary member firmly into seal plate, use a seal tool or pipe. Nothing should come in contact with the seal face except the seal tool. Be sure the stationary is in straight.
Place seal’s retaining ring, spring onto shaft. Lightly oil (Do not use grease) shaft and inner surface of bellows.
With lapped surface of seal’s rotating member facing outward, slide over shaft using a seal tool, being carefull not to damage seal face.
Make sure spring is seated in retaining ring and spring is lined up on rotating member and not cocked or resting on bellows tail. Motor:
Slide rotor/shaft with bearings and seal parts into seal plate until bearing seats into seal plate. Install snap ring into seal plate.
Lower housing while stringing motor leads through the cord entry bore, with motor stator onto seal plate.
Place screws with washers through housing into seal plate and torque to 60 in/lbs.
Power Cord:
Check power cord for cracks or damage and replace if required. Reconnect motor leads.
Place power cord with nylon housing, ring, washer and gland nut into housing and tighten gland nut to 17.5 ft/lbs. Impeller, V-ring and Volute:
Position v-ring into seal plate until seated.
Clean the threads with thread locking compound cleaner. Apply removable Loctite® 242 or equivalent to shaft threads. Screw impeller onto the shaft hand tight while using a screwdriver in the slot at the end of the shaft to hold it
stationary. Rotate impeller to check for binding.
Position gasket on volute flange and position impeller and motor housing assembly on volute.
Place screws into volute and torque to 11 ft/lbs. Check for free rotation of impeller.
Refill with cooling oil.