Franklin Electric 3nc & 4nc Submersible Non-Clog Pumps Owner’s Manual

Franklin Electric 3nc & 4nc Submersible Non-Clog Pumps

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 FPS recommendations may result in electrical shock or fire hazard, unsatisfactory performance, or equipment failure.
Know the product’s application, limitations, and potential haz-ards. Read and follow instructions carefully to avoid injury and property damage. Do not disassemble or repair unit unless described in this manual. 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.
• Pumps can be used in hazardous locations classified as Class 1, Groups C and D by the NEC where flammable gases or vapors extreme caution during installation, operation, and maintenance. Refer to the NEC handbook for more details.
• 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 Risk of severe injury or death by electrical shock.

• To reduce risk of electrical shock, disconnect power before work-ing on or around the system. More than one disconnect switch may be required to de-energize the equipment before servicing.

• Wire pump system for correct voltage.

• Do not use an extension cord; provide a properly located control panel or junction box.

• For single-phase motors, ensure power, neutral, and ground wires are properly connected. If not, a qualified, licensed electri-cian should correct the problem.

• These pumps are supplied with lead wires and are intended to be hardwired using a junction box or other approved enclosure. The pump includes a grounding conductor. To reduce risk of electric shock, be certain that it is properly connected to ground.

• To avoid hazards when installing or servicing, install a double-pole disconnect near the pump installation.
  Risk of severe injury or death by electrical shock.

• If the supply cord is damaged, it must be replaced by the manu-facturer, its service agent, or similarly qualified persons in order to avoid a hazard.

• Check local electrical and building codes before installation. The installation must be in accordance with their regulations as well as the most recent National Electrical Code (NEC) and the Occu-pational Safety and Health Act (OSHA).

• Do not use the power cord for lifting the pump.

• The pump should only be used with liquids compatible with pump component materials. If the pump is used with liquids incompati-ble with the pump components, the liquid can cause failure to the electrical insulation system resulting in electrical shock.

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

• This equipment must not be used by children or persons with reduced physical, sensory or mental abilities, or lacking in experi-ence 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.
• Do not run the motor or pump dry (without liquid) for more than 15 minutes. 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 the pump. Refer to the motor manual.
• Do not let the unit freeze. Freezing may cause cracking or distor-tion that may destroy the unit.
•  An inoperative or malfunctioning pump could lead to flooding, resulting in personal injury or property damage.
• The pump has been evaluated for use with water only. Pump should only be used with liquids compatible with pump compo-nent materials.
• Operation of this equipment requires detailed installation and operation instructions provided in the pump, motor, and control panel manuals provided with this product. Read the entirety of all manuals before starting installation and operation. End User should receive and retain all manuals for future use.
• Keep safety labels clean and in good condition.
• Keep work area clean, well-lit, and uncluttered. Wear safety glasses while installing or performing maintenance on the pump.

PRODUCT DESCRIPTION

The NCX Series pumps are intended for municipal sewage, wastewater, or stormwater from commercial buildings, condominiums, hotels, hospitals, industrial, treatment, and general de-watering applications in Class 1, Groups C and D hazardous locations as defined by the NEC. Various configurations and methods for plumbing may be used; however, for ease of installation, proper operation, and serviceability, it is highly recommended to use a Franklin Engineered Products basin package with rail system and a Franklin Engineered Products control panel. Refer to the motor and control panel manuals for a complete installation, operation, and hazardous location details. Three-inch discharge flange pumps are capable of handling 2.5” spherical solids, and four-inch discharge flange pumps can handle 3” spherical solids. This product is covered by a Limited Warranty for a period of 2 years from the date of original purchase by the consumer. For complete warranty information, refer to www.franklinengineered.com or call Customer Support for a printed copy.

Specifications

3” Discharge Models

3

| 1
3NCX-320P3| 208| 9.3| ****

3

3NCX-323P3| 230| 8.4
3NCX-346P3| 460| 4.4
3NCX-357P3| 575| 3.52
3NCX-523P1| 230| 30| ****

5

| 1
3NCX-520P3| 208| 15.4| ****

3

3NCX-523P3| 230| 14
3NCX-546P3| 460| 7
3NCX-557P3| 575| 5.6

PRODUCT DESCRIPTION Flow Rates

4” Discharge Models

3

| 1
4NCX-320P3| 208| 9.3| ****

3

4NCX-323P3| 230| 8.4
4NCX-346P3| 460| 4.4
4NCX-357P3| 575| 3.52
4NCX-523P1| 230| 30| ****

5

| 1
4NCX-520P3| 208| 15.4| ****

3

4NCX-523P3| 230| 14
4NCX-546P3| 460| 7
4NCX-557P3| 575| 5.6
4NCX-7520P3| 208| 22.3| ****

7.5

4NCX-7523P3| 230| 20.2
4NCX-7546P3| 460| 10.1
4NCX-7557P3| 575| 8.08
4NCX-1020P3| 208| 28.7| ****

10

4NCX-1023P3| 230| 26
4NCX-1046P3| 460| 13
4NCX-1057P3| 575| 10.4

Flow Rates

Shut Off
3| 350 / 1324.9| 240 / 908.5| 75 / 283.9| –| 36 / 136.3
5| 515 / 1949.5| 425 / 1608.8| 325 / 1230.3| 200 / 757.1| 52 / 196.8
HP| 4 NCX Performance – Gallons/Liters per Minute at Height
---|---
10 ft (3 m)| 20 ft (6 m)| 30 ft (9.1 m)| 40 ft (12.1 m)| 50 ft (15.2 m)| 60 ft (18.3 m)| Shut Off
3| 365 / 1381.7| 220 / 832.8| 20 / 75.7| –| –| –| 33 / 124.9
5| 355 / 1343.8| 450 / 1703.4| 330 / 1249.2| 170 / 643.5| –| –| 52 / 196.8
7.5| –| 560 / 2119.8| 450 / 1703.4| 335 / 1268.1| 180 / 681.4| –| 61 / 230.9
10| –| 625 / 2365.9| 570 / 2157.7| 470 / 1779.1| 360 / 1362.7| 225 / 851.7| 75 / 283.9

INSTALLATION

Physical Installation

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

• NEC Hazardous Class 1 environments require non-sparking guide rail or disconnect equipment to prevent sparks during installation and maintenance.
• Typical wastewater collection systems are potentially dangerous environments due to gases col-lected in wet wells. Follow all personnel codes and requirements for training, procedures, and equip-ment for guide rail systems and wet wells. Guide rail systems are usually designed to allow easy removal without the need for entry into the wet well or manipulating the piping.

Caution Risk of personal injury, or damage to pump or other equipment.

• Check that lifting equipment complies with all safety rules, and is suitable to support the weight of the pump.

• For guide rail systems, the pit floor must be flat under the guide rail base with sufficient loading capacity to support the entire weight of the system.

• In guide rail system installations, install the pump opposite the influent opening to prevent stagnant areas where solids can settle.

  • Install the pump in a suitable gas-tight basin vented in accordance with local, state, and federal plumb-ing codes.

  • Place the pump-basin assembly on a hard, level surface.
    IMPORTANT: Never place pump directly on clay, earth, or gravel surfaces. These surfaces contain small stones, gravel, sand, etc. that may clog or damage the pump and cause failure.

  • Secure the pump so the starting torque does not cause the pump to contact anyone or anything.

• Install discharge piping.

  • Do not use piping smaller than the pump discharge.
  • Use ABS, PVC, polyethylene, stainless steel, or galvanized steel pipe.
  • For rail systems, use proper adapters to connect nonmetal pipe. Refer to the instructions supplied with the system.

• Install a full-flow check valve in the discharge line horizontally to prevent back flow of liquid into the basin.

  • A ball check valve is recommended.
  • If installed vertically, solids may settle in the valve and prevent it from opening at start-up.

• Drill a 3/16″ diameter relief hole in the discharge pipe below the floor line between the pump discharge and check valve.

  • If not provided, the pump could “air lock” and will not pump water even though it will run.

• Install a shut off valve following the check valve to allow for cleaning of the check valve or pump removal.

Electrical Connection

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

• Follow all electrical connections and for the pump and float switches in the control panel for Class 1 Hazardous environments.
• Use “intrinsically safe relays” to power the control float switches in Class 1 environments and wet wells to operate on very low voltage and amperage to eliminate danger of a spark due to power cord damage.
• The sensor wiring must be separated from other input wiring by separate conduits or raceways.

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

• To minimize risk of electrical shock, disconnect power before working on or around the system.

• 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 into a control panel. Any splice between the pump and the control panel must be made within a junction box mounted outside of the basin and comply with the National Electrical Code. Employ a licensed electrician.

• Check the pump label for proper voltage required. Do not connect to voltage other than that shown.

• Connect to a circuit equipped with a ground fault circuit interrupter (GFCI) device if required by code.

• The pump should be connected or wired to its own circuit with no other electric receptacles or equip-ment in the circuit.

• The fuses or circuit breaker should be of ample capacity in the electrical circuit. For amperage ratings, refer to “3” Discharge Models” on page 3 and “4” Discharge Models” on page 4.
  IMPORTANT: 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.

• Follow the wiring instructions supplied with the control panel. Make proper connections for the heat sensor, seal fail sensor, level sensing equipment, and thermal and overload protection system(s). IMPORTANT: Improper wiring or lack of the seal fail sensor, thermal pro- tection system, and/or the overload protection system to the control panel will void the warranty and Class 1 listing.

Heat Sensor Wiring

Motor heat sensors open if the motor windings experience excessive heat, thereby opening the circuit in the control panel and cutting off power to the pump. The pump automatically restarts when the motor has cooled to an accept- able temperature.

IMPORTANT: Improper wiring of the heat sensor to the control panel will void the warranty and Class 1 listing. Connect the black and white heat sensor leads to the thermal sensor terminals in the panel.

Seal Fail Sensor Wiring

The motor has integral moisture sensors that must be properly connected to a control panel with seal-fail circuitry. The pump can be removed from service when moisture is detected in the seal-fail chamber. The presence of water in this chamber energizes the seal leak warning light inside the control panel (if so equipped with this option).

IMPORTANT: Improper wiring of the seal fail sensor to the control panel will void the warranty and Class 1 listing.
NOTE: This is a warning light only and will not keep the pump from continuing to operate.

•  Connect the red (W1) and orange (W2) moisture sensor leads to the seal terminal in the control panel.
• Connect the green ground wire to ground inside the control panel.

Impeller Rotation

Notice Risk of damage to pump or other equipment.

• Improper impeller rotation will result in damage to the pump. Rotation must be checked at installa-tion.
• Verify the disconnect switch is in the “Off” position.
• Lay the pump on its side.
• Verify the impeller rotates counterclockwise by briefly turning the disconnect switch to the “On” posi-tion.
• Startup kickback rotation is also counterclockwise when viewed from the top of the suspended pump.
• To change rotation of 3-phase motors, interchange any two of the white, red, or black wires of the pump at the disconnect box.

Level Sensing Controls

• Pump Off Control: Should be set to turn the pump off when the water level is at the top of the motor housing. By setting the control at this point you are utilizing the liquid being pumped to help cool the motor which improves the life expectancy of the motor.
• Pump On Control: Should be set to turn the pump on between 6″ to 12″ below the Lag/Alarm control device. An optimum cycle for these products would be between 2 to 3 minutes of run time per cycle.
• Lag/Alarm Control: Should be set between 6″ to 12″ below the inlet of the station. It is important to note that no control device should ever be set above the inlet of any station.

MAINTENANCE

Caution Risk of personal injury or damage to pump or other equipment.

• Before working on pump, always disconnect pump power cord in addition to shutting off circuit breaker or removing the fuse. Always wear eye protection.
• Do not remove motor housing seal plate screws or top motor housing screws. The motor section of the pump is permanently lubricated with dielectric oil and sealed at the factory. Removal of these screws by anyone other than an authorized service center will break the seal and void the warranty Risk of damage to pump or other equipment.
• Periodically inspect pump and system components. Regularly check hoses for weakness or wear, making certain that all connections are secure.
• Schedule and perform routine maintenance as required and in accordance with the Maintenance section of this manual.

Disconnect Power

• The pump and surrounding areas may be covered with water. Never plug in or unplug the device while standing in wet or damp surfaces. Do not stand in water and do not touch any other conductive sur-faces.
• If necessary, remove power at the breaker panel or have a certified electrician remove power before attempting to service. Serious or fatal shocks could result if proper procedures are not followed. Disconnect the power at the main electrical service box by switching off the appropriate circuit breaker or removing fuse.
• In applications where screw-type fuses are used, remove using only one hand while the other hand and torso are free from contact with anything.

Periodic Service

Inspect and test the pump system condition and operation every 3 months—more frequently in heavy-use applications.
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.

1. Check the power cords and electrical outlet for damage or corrosion.
2. Remove all debris (gravel, sand, floating debris, etc.) from the basin.
3.  Check the pump system components (basin, pump, switch, 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 that all flexible coupling hose clamps are fully engaged with plumbing and fully tightened.
5. Test operation of the pump system.
6.  While the pump is running, make sure a stream of water is escaping from the air bleed hole. If not, clear the hole of any deposits or debris.

Thermal Protection

Caution Risk of personal injury or damage to pump or other equipment.

• Equipment can start automatically. Always unplug the pump power cord and disconnect the electri-cal power before servicing the pump.

IMPORTANT: A lack of or improper wiring of thermal and overload protection to the control panel will void the warranty and Class 1 listing.
When fully submerged, the motor is a continuous duty type equipped with an automatic resetting heat sen-sor and may restart unexpectedly. When connected with a panel that includes thermal overloads, the pump may restart unexpectedly. Heat sensor opening is an indication of motor overloading/overheating, which can be caused by application issues such as:

• an obstructed pump impeller
• switch stuck in the ON position
• pump running dry
• pump air locked
• pump short cycling
• operating the pump at low heads (low discharge restriction)
• excessively high or low voltage supply
• inadequate wiring
• incorrect motor connections
• misapplication of the product
• pump, motor, bearings, or seal that have reached the end of their useful life. Any of these conditions must be corrected to extend the life of the pump.

Wear Plate Adjustment

Wear plate parts:

• Locking bolt

• Adjustment bushing

• Wear plate

• Impeller
  To adjust the wear plate:

• Loosen the locking bolt (1) and adjustment bushing (2).

• Press wear plate (3) until it makes contact with the impeller (4).

• Advance the adjustment bushings (2) until they touch the pump housing.

• Slightly tighten to advance bushing (2) so the impeller (4) turns freely.

• Make sure the impeller spins freely and the clearance between the wear plate and the impeller is less than 0.04” (1 mm).

• Fully tighten the locking bolt (1) to the adjustment bushing (2) to prevent loosen-ing or movement.

• Repeat adjustment process if necessary.

Troubleshooting

Pump does not turn on

| Pump is not connected to power.| Power the pump according to the manual.
Circuit breaker is off or fuse is removed.| Turn on circuit breaker or replace fuse.
Accumulation of trash on float.| Clean float.
Float obstruction.| Clean float path and provide clearance.
Defective switch.| Replace switch
Defective motor.| Replace pump.
The heat sensor has shut down the system.| Refer to “Thermal Protection” on page 9. Wait 15 minutes for system to reset.

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 dis- charge liquid

| Check valve installed backwards.| Check flow indicating arrow on check valve body to ensure proper installa- tion.
Check valve stuck or plugged.| Remove check valve and inspect for proper installation.
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.
Low voltage, speed too slow.| Check that supply voltage matches nameplate rating.
Impeller or discharge pipe is clogged.| Pull pump and clean. Check pipe for scale or corrosion.
Impeller wear due to abrasives.| Replace worn impeller.

Pump cycles continually

| No check valve in long discharge pipe allowing water to drain back into basin.| Install a check valve in the discharge line.
Check valve leaking.| Inspect check valve for correct operation.
Basin too small for inflow.| Install larger basin.

Replacement Parts

Model Repair Kits” on page 11 or “4NCX Model Repair Kits” on page 11.
1, 2, 4, 6, 9, 10| Hardware Kit| 305625012
5| Volute Kit – 3NCX| 305625007
Volute Kit – 4NCX| 305625008
6, 7| Adapter Flange Kit

(3NCX-523P1, 4NCX-523P1, & 4NCX-10xxP3 models)

| 305625009
8, 9, 10| Wear Plate Kit – 3NCX| 305625010
Wear Plate Kit – 4NCX| 305625011
11| Motor Screws Kit (connects volute or adapter flange to motor)| Refer to “3NCX Model Repair Kits” on page 11 or “4NCX Model Repair Kits” on page 11.
12| Motor Cable Kit| Refer to “3NCX Model Repair Kits” on page 11 or “4NCX Model Repair Kits” on page 11.
N/A| 3HP NCX Starting Kit| 305625101
N/A| 5HP NCX Starting Kit| 305625102

3NCX Model Repair Kits

Items| Description| 3NCX-323P1| 3NCX-523P1| 3NCX-

320P3

| 3NCX-

323P3

| 3NCX-

346P3

| 3NCX-

357P3

| 3NCX-

520P3

| 3NCX-

523P3

| 3NCX-

546P3

| 3NCX-

557P3

---|---|---|---|---|---|---|---|---|---|---|---
1, 2, 3, 4| Impeller Kit| 305625001| 305625002| 305625001| 305625002
11| Motor Screws Kit| 305625014| 305625013| 305625014
12| Motor Cable-25 ft| 802386203R| 802386201R| 802386203R
Motor Cable-50 ft| 802386203T| 802386201T| 802386203T

4NCX Model Repair Kits 4NCX-3xxxx & 4NCX-5xxxx Models

Items| Description| 4NCX-323P1| 4NCX-523P1| 4NCX-

320P3

| 4NCX-

323P3

| 4NCX-

346P3

| 4NCX-

357P3

| 4NCX-

520P3

| 4NCX-

523P3

| 4NCX-

546P3

| 4NCX-

546P3

---|---|---|---|---|---|---|---|---|---|---|---
1, 2, 3, 4| Impeller Kit| 305625003| 305625004| 305625003| 305625004
11| Motor Screws Kit| 305625014| 305625013| 305625014
12| Motor Cable-25 ft| 802386203R| 802386201R| 802386203R
Motor Cable-50 ft| 802386203T| 802386201T| 802386203T

References

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