Little Giant 14S Submersible Pumps Owner’s Manual

Little Giant 14S Submersible Pumps

Specifications

Product Usage Instructions

Safety Instructions

Risk of death, personal injury, or property damage due to explosion, fire, or electric shock. High voltages capable of causing severe injury or death by electrical shock are present in this unit. Follow all safety guidelines and regulations.

Installation – Typical Installation

Risk of bodily injury, electric shock, or equipment damage. Ensure proper installation in a gas-tight basin with suitable discharge piping and connections. Do not restrict the pump’s intake side.

Installation – Physical Installation

Proper physical installation is crucial to prevent damage to the pump. Install the pump in the center of a gas-tight basin, connect discharge piping using pipe joint compound, and ensure proper electrical connections.

Installation – Electrical Connections

Risk of severe injury or death by electrical shock. Follow proper electrical connection guidelines, ensure power cord integrity, and do not connect to devices that run intermittently. Install thermal or overload protection control as necessary.

Maintenance – Periodic Service

Regular maintenance is essential for the longevity of the pump. Follow manufacturer guidelines for periodic service to ensure optimal performance and safety.

FAQ

Q: What should I do if the pump is not functioning as intended?

A: Check the power supply, connections, and ensure proper installation. If issues persist, refer to the troubleshooting section in the user manual or contact customer support.

14S and 16S Series

Little Giant 14S and 16S series submersible pumps are recommended for use in basins or lift stations and suitable for sewage wastewater transfer, and dewatering. These pumps have 2 inches (50.8 mm) spherical solids handling capability. For single phase models use with approved liquid level control with correct rating that matches marked motor input in full load amperes or service factor amperes. For three phase pumps 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. This product is covered by a Limited Warranty for a period of 3 years from the date of original purchase by the consumer. For complete warranty information, refer to www.LittleGiant.com

Specifications

Model| Discharge in (mm)| HP| Volts| Hz| Amps| Watts| Phase| PSI| Shut Off ft (m)
---|---|---|---|---|---|---|---|---|---

14S

| 2 (51)| ****

1/2

| 115| ****

60

| 11.6| ****

1100

| ****

1

| ****

10.8

| ****

25 (7.6)

3 (76.2)
2 (51)| 208-240| 4.6
3 (76.2)

16S

| ****

3 (76.2)

| ****

1

| 200-208| 11| 2000| ****

15.1

| ****

35 (10.7)

230| 1900
6.3| 1500| ****

3

200-208| 6.8| 800
380| 50/60| 3| 850
460

SAFETY INSTRUCTIONS

This equipment should be installed and serviced by technically qualified personnel who are familiar with the correct selection and use of appropriate tools, equipment, and procedures. Failure to comply with national and local electrical and plumbing codes and within Little Giant recommendations may result in electrical shock or fire hazard, unsatisfactory performance, or equipment failure. Know the product’s application, limitations, and potential hazards. Read and follow instructions carefully to avoid injury and property damage. Do not disassemble or repair unit unless described in this manual. Refer to product data plate(s) for additional precautions, operating instructions, and specifications. Failure to follow installation or operation procedures and all applicable codes may result in the following hazards:

Danger

Risk of death, personal injury, or property damage due to explosion, fire, or electric shock.

• Do not use to pump flammable, combustible, or explosive fluids such as gasoline, fuel oil, kerosene, etc.
• Do not use in explosive atmospheres or hazardous locations as classified by the NEC, ANSI/NFPA70.
• Do not handle a pump or pump motor with wet hands or when standing on a wet or damp surface, or in water.
• When a pump is in its application, do not touch the motor, pipes, or water until the unit is unplugged or electrically disconnected.
• If the power disconnect is out of sight, lock it in the open position and tag it to prevent unexpected application of power.
• If the disconnect panel is not accessible, contact the electric company to stop service

Warning

High voltages capable of causing severe injury or death by electrical shock are present in this unit.

• To reduce risk of electrical shock, disconnect power before working on or around the system. More than one disconnect switch may be required to de-energize the equipment before servicing.
• Some pumps are supplied with a grounding conductor and grounding-type attachment plug. To reduce risk of electric shock, be certain that it is connected only to a properly grounded grounding-type receptacle. Do not remove the third prong from the plug.
• The third prong is to ground the pump to help prevent possible electric shock hazard. Do not use an extension cord.
• Some pumps are supplied without a plug and are intended to be hardwired using a junction box or other approved enclosure. These pumps include a grounding conductor. To reduce risk of electric shock, be certain that is properly connected to ground according to code. The Flexible jacketed cord assembly mounted to the pump must not be modified in any way, with the exception of shortening the cord to fit in a control panel. Any splice between the pump and the control must be made within a junction box and comply with the National Electrical Code.
• Check electrical outlets with a circuit analyzer to ensure power, neutral, and ground wires are properly connected. If not, a qualified, licensed electrician should correct the problem.
• Wire pump system for correct voltages.
• Employ a licensed electrician.
• Be sure the electrical connection cannot be reached by rising water. Under no circumstances should the junction box be located where it may become flooded or submerged by water.
• Do not use the power cord for lifting the pump.
• Check local electrical and building codes before installation. The installation must be made in accordance with their regulations as well as the most recent National electrical Code (NEC) and the Occupational Safety and Health Act (OSHA).

Caution

Risk of bodily injury, electric shock, or equipment damage.

• Operation of this equipment requires detailed installation and operation instructions provided in this manual. Read entire manual before starting installation and operation. End User should receive and retain manual for future use.
• This equipment must not be used by children or persons with reduced physical, sensory or mental abilities, or lacking in experience and expertise, unless supervised or instructed. Children may not use the equipment, nor may they play with the unit or in the immediate vicinity.
• Equipment can start automatically. Always unplug the pump power cord and disconnect the electrical power before servicing the pump or switch.
• An inoperative or malfunctioning pump could lead to flooding, resulting in personal injury or property damage. Use with approved liquid level control with correct rating that matches marked motor input in full load amperes or service factor amperes.
• In applications where property damage and/or personal injury might result from an inoperative or leaking pump due to power outages, discharge line blockage, or any other reason, an automatic back-up system and/or an alarm should be installed.
• Do not run the pump dry. If run dry, the surface temperature of the pump will rise to a high temperature that could cause skin burns if touched and will cause serious damage to your pump.
• Do not oil the motor. The pump’s motor housing is sealed, with a high-grade dielectric oil for heat transfer and lifetime lubrication. Use of other oils could cause serious electric shock and/or permanent damage to the pump.
• Keep safety labels clean and in good condition.
• Do not use motor in swimming areas or marine applications.
• Manual, continuous pump operation should be used only for emergencies, or when a large volume of water is to be pumped. The pump must be continuously monitored during operation and disconnected from power before the pump runs dry.
• The pump has been evaluated for use with water only. Pump should only be used with liquids compatible with pump component materials. If the pump is used with liquids incompatible with the pump components, the liquid can cause failure to the electrical insulation system resulting in electrical shock.

Notic

Risk of damage to pump or other equipment.

• Do not use this pump for pumping sea water, beverages, acids, chemical solutions, or any other liquid that promotes corrosion as this can result in damage to the pump.
• Do not run pump dry. For optimal cooling and to prolong the motor life, the liquid level being pumped should normally be above the top of the pump housing.
• This pump is not suitable for pond applications.

INSTALLATION

Typical Installation

1. Gas Tight Basin
2. Discharge
3. Union
4. Check Valve
5. Gate Valve
6. Intake
7. Air Bleed Hole
8. Vent Electrical
9. Connections” on
10. Caulking Hub

Physical Installation

Notic

Risk of damage to pump or other equipment.

• Support pump and piping when assembling and when installed. Failure to do so may cause piping to break, pump to fail, motor bearing failures, etc.
• If the relief hole in the discharge pipe is not provided, the pump could “air lock” and will not pump water even though it will run.
• A missing, improperly installed, or malfunctioning check valve can cause a pump to short-cycle due to back-flow of the pumped fluid from the discharge plumbing back into the basin, significantly shortening the life of the pump.

1. Install the pump in the center of a suitable gas tight basin that is at least 18 inches (45.72 cm) in diameter and 30 inches (76.2 cm) deep and vented in accordance with local plumbing codes.

   • Ensure sump is clean and free of nails, gravel, string, cloth, or other debris before installing.
   • Provide adequate room for future servicing, protection from freezing temperatures, flooding, and equipment drainage.
   • Never place the pump directly on clay, earth, or gravel surfaces.
     IMPORTANT: Do not attempt to restrict the intake side of the pump.

2. Connect discharge piping, using pipe joint compound at all threaded connections.

   • The discharge pipe should be as short as possible and contain as few elbows as possible.
   • Do not use piping smaller than the pump discharge.
   • Use ABS, PVC, polyethylene, stainless steel, or galvanized steel pipe.
   • Use pipe joint compound or PFTE tape at all threaded connections.
   • For rail systems, use proper adapters to connect nonmetal pipe. Refer to the instructions supplied with the system.

3. Install a union in the discharge line just above the basin cover.

4.  Install a full flow check valve in the discharge line that will easily pass ¾ inch (1.91 cm) solids.

   • Install the check valve in a horizontal position or at an angle of no more than 45°.

5.  Install a gate valve in the discharge line.

6. Tape the pump cords to the discharge piping with electrical tape.

7. Add an air relief bleed hole 1/8 or 3/16 inch (0.32 or 0.48 cm) in diameter in the discharge pipe.

   • Drill this hole at a 45° angle below the horizontal plane and away from the pump.

8. Install a separate sump vent.
   NOTE: A connection is provided on top of the sump or cover which must be piped to the existing building vent or extended outside with its own standpipe.

9. Connect the pump to an appropriate power supply. Refer to “Electrical Connections” on page 5.

10. Confirm that the pump is functioning as intended.

11. Place cover over basin

Electrical Connections

Warning

Risk of severe injury or death by electrical shock.

• Always disconnect the electrical power before touching the pump, discharge or electrical plug when water is present in the area.
• Be certain that this pump is connected to a circuit equipped with a ground fault circuit interrupter (GFCI) device if required by code.

IMPORTANT: If the power cord is damaged, the whole unit must be replaced

1. Connect the power cord to a constant source of power matching the pump nameplate voltage.

   • Connect the pump to its own circuit, with no other electric receptacles or equipment in the circuit.
   • Do not connect to a voltage other than that shown.
   • Ensure that the fuses or circuit breaker are of ample capacity in the electrical circuit.
     NOTE: Do not connect to a fan or any device that runs intermittently.

2. Install a thermal or overload protection control

Impeller Rotation

NOTE: These instructions apply to only 3-phase pumps.

1. Ensure the circuit breakers are in the “OFF” position.
2. Lay pump on the side to observe the direction of rotation through the intake.
3. Turn circuit breakers to the “ON” position.
4. Make sure the impeller is rotating counter-clockwise.
5. To change the rotation, interchange any two of the white, red, or black wires of the pump at the disconnect box.

MAINTENANCE

warning

Risk of severe injury or death by electrical shock, high temperatures, or pressurized fluids.

• Always unplug the pump power cord in addition to removing the fuse or shutting off the circuit breaker before working on the pump or switch.
• Let pump cool for a minimum of 2 hours before attempting to service. Submersible pumps contain oil that becomes pressurized and hot under normal operating conditions

Notice

Risk of damage to pump or other equipment.

• This unit is permanently lubricated. Oiling is not required. Do not open the sealed portion of the unit or remove housing screws.
• Do not remove the motor housing cover, impeller, socket head cap screws, or seals. Warranty is void if the motor housing cover, impeller, or seals have been removed. Repairs on the motor or impeller require special tools

Periodic Service

Inspect and test the pump system condition and operation every three months—more frequently in heavy use applications.

1. Check the power cords and electrical outlet for damage or corrosion.
   IMPORTANT: The unit must be replaced if the power cord is damaged.

2. Remove all debris (gravel, sand, floating debris, etc.) from the basin.

3. Check the pump system components (basin, pump, etc.) for any build-up (sludge, sediment, minerals, etc.) that would inhibit functionality of the components.

   • If significant, remove build-up or replace affected components.

4. Confirm all flexible coupling hose clamps are fully tightened.

Cleaning Impeller and Volute

1. Disconnect power to the pump.

2. Remove the four bolts that hold the volute to the motor housing.

3. Separate the volute from the motor housing.
   IMPORTANT: Do not remove the motor housing bolts or screws.

4. Clean the impeller and the volute passage.
   IMPORTANT: Do not use strong solvents on the impeller.

5. Be sure the impeller turns freely.

6. Reattach the volute to the motor housing, securing it with the bolts.

Troubleshooting

Pump does not turn on

| Pump not plugged in| Plug in pump.
Circuit breaker off or fuse removed| Turn on circuit breaker or replace fuse.
Accumulation of trash on float| Clean float.
Float obstruction| Check float path and provide clearance.
Defective switch| Replace switch.
Defective motor| Replace pump.

Pump will not shut off

| Float or float rod obstruction| Check float and float rod path and provide clearance.
Pump is air locked| Remove pump and clean air bleed hole.
Liquid inflow matches pump capacity| Larger pump required.
Defective switch| Replace switch.

Pump runs but does not discharge liquid

| Check valve installed backwards| Check flow indicating arrow on check valve body to ensure proper installation.
Check valve stuck or plugged| Remove check valve and inspect for proper operation.
Lift too high for pump| Check rated pump performance.
Inlet to impeller plugged| Pull pump and clean.
Pump is air locked| Remove pump and clean air bleed hole.

Pump does not deliver rated capacity

| Lift too high for pump| Check rated pump performance.
Rotation incorrect (three-phase only)| Switch any two of the line wires.
Low voltage, speed too slow| Check that supply voltage matches the nameplate rating.
Impeller or discharge pipe is clogged| Pull pump and clean. Check pipe for scale or corrosion.
Impeller wear due to abrasives| Replace pump.

Pump cycles continuously

| No check valve in long discharge pipe allowing liquid to drain back into basin| Install a check valve in discharge line.
Check valve leaking| Inspect check valve for correct operation.
Basin too small for inflow| Install larger basin.
Water sprays out of a hole in the discharge pipe.| There should be a bleed hole in the dis- charge pipe that allows trapped air to escape from the pump, preventing air lock Water spraying out of this hole is com- pletely normal|

No corrective action is required.

Replacement Parts

114009
Disc, Flange 2″ FNPT (only for model 514320)| 114004
3| Screw, 7/16 – 14 X 1-1/4| 903722
4| Lock washer, 7/16| 921104
5| Flange Gasket| 114101
6| Volute, 14S/16S| 114042
7| Jam Nut, 1/2″ x 20| 920004
8| Impeller 14S| 114044
Impeller 16S (only for models 514620, 514625, 514630)| 114013
9| V-Seal, Nitrile| 926016
10| Seal Ring, 7.484 I.D.| 928033
11| Screw, 5/16-18 x 1-1/4″| 903724

For technical assistance, parts, or repair, please contact:

• 800.701.7894 |
• littlegiant.com
• 10000011131 Rev. 001 05/23

References

• HVAC and Wastewater Pumps & Systems | Little Giant
• HVAC and Wastewater Pumps & Systems | Little Giant
• HVAC and Wastewater Pumps & Systems | Little Giant

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