Franklin Electric Little Giant 16 G Series User manual

littlegiant.com
ENGLISHEN
16 G Series Grinder Pumps
Owner’s Manual
Table of Contents
PRODUCT DESCRIPTION - - - - - - - - - - 3
Specifications- - - - - - - - - - - - - 3
INSTALLATION - - - - - - - - - - - - - - 4
Physical Installation - - - - - - - - - - 4
Electrical Connections- - - - - - - - - 5
Automatic Pump Models - - - - - 5
Manual Pump Models - - - - - - - 5
OPERATION - - - - - - - - - - - - - - - - 6
Testing Automatic Pump Operation - - 6
Testing Manual Pump Operation- - - - 7
MAINTENANCE - - - - - - - - - - - - - - 8
Disconnect Power- - - - - - - - - - - 8
Periodic Service- - - - - - - - - - - - 8
Thermal Protection - - - - - - - - - - 9
Disassembly - - - - - - - - - - - - - 9
Reassembly- - - - - - - - - - - - - -10
Replacement Parts - - - - - - - - - - 11
Troubleshooting - - - - - - - - - - -12

SAFETY INSTRUCTIONS
2
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 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:
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.
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.
• 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).
• Wire pump system for correct voltage.
• This product is 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.
• A separate branch circuit is recommended for each 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.
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 pump dry. If run dry, the surface of the pump will rise
to a high temperature that could cause skin burns if touched, and
will cause serious damage to the pump.
• Do not oil the motor. The pump’s motor housing is sealed, and
contains 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
• Do not let the unit freeze. Freezing may cause cracking or distor-
tion that may destroy the unit.
• 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 auto-
matic back-up system and/or an alarm should be installed.
• Do not use the power cord for lifting the pump.
• Do not place hands, feet or clothing near the cutter mechanism
when there is any possibility the pump is connected to a power
source. This pump contains a cutting mechanism with very sharp
edges that can cause severe bodily injury.
• The pump has been evaluated for use with water only. Pump
should only be used with liquids compatible with pump compo-
nent 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.
• Operation of this equipment requires detailed installation and
operation instructions provided in this manual for use with this
product. Read entire manual before starting installation and oper-
ation. End User should receive and retain manual for future use.
• Keep safety labels clean and in good condition.
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 con-
nections are secure.
• Schedule and perform routine maintenance as required and in
accordance with the Maintenance section of this manual.

PRODUCT DESCRIPTION
Specifications
3
PRODUCT DESCRIPTION
Submersible grinder pumps are recommended for use in basins or lift stations and are suitable for pumping
residential sewage, effluent, wastewater, and other non-explosive, non-abrasive, and non-corrosive liquids.
These pumps utilize a cutting mechanism, located on the suction side of the pump, that cuts solids into a
slurry. A semi-vortex, non-clog impeller then passes this slurry directly through the volute and into the dis-
charge line.
Little Giant automatic grinder pumps are equipped with a float switch that allows the pumps to operate
automatically by cycling them on and off. The float switch is attached to the pump at a pre-determined
tether length of 6 inches. Check the tether length on the pump to ensure it has not changed during ship-
ping. Some pumps, however, come with an unassembled mechanical vertical switch.
This product is covered by a Limited Warranty for a period of 36 months from the date of original purchase
by the consumer. For complete warranty information, refer to www.LittleGiant.com; or call Customer Sup-
port for a printed copy.
Specifications
Flow Rates
Model No. Volt Amps Watts HP Phase
16G-M151-20
115 12.5 1280
1 1
16G-F151-20
16G-V151-20
16G-M231-20
230 6.5 1290
16G-F231-20
16G-V231-20
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) Shut Off
49.3 / 186.6 43.9 / 166.2 37.5 / 142.0 28.7 / 108.6 15.3 / 57.9 53 ft (16.15 m)

INSTALLATION
Physical Installation
4
INSTALLATION
Physical Installation
1. Install the provided leg accessory kit:
• Remove the three shipping bolts from the volute casting legs using a 19 mm wrench or crescent
wrench.
• Screw the nut all the way onto the removable leg bolt.
• Screw the leg bolt and its nut onto the volute casting legs hand tight.
• Tighten the nut against the volute casting with a 19 mm wrench or crescent wrench.
2. If purchased with a vertical switch, install it using a P1 size Phillips screwdriver:
• Screw the bracket onto the switch with the two self-tapping screws.
• Assemble the vertical switch and its bracket onto the motor housing cover using the 2 M4 screws.
3. Install the pump in a suitable gas-tight basin at least 20" diameter and 24" deep vented in accordance
with local, state, and federal plumbing codes.
4. Place the pump-basin assembly on a hard, level surface.
• 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.
5. Install discharge piping.
• Do not use piping smaller than the pump discharge.
• Use ABS, PVC, polyethylene, or galvanized steel pipe.
• For rail systems, use proper adapters to connect nonmetal pipe.
6. 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.
7. 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.
8. Install a shut off valve following the check valve to allow for cleaning of the check valve or pump
removal.
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.

INSTALLATION
Electrical Connections
5
Electrical Connections
• 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 “Specifications” on page 3.
• If a junction box is used, removal of plug is required. Little Giant assumes no responsibility for improper
wiring of the pump/float switch in the junction box.
• Refer to alarm system’s manual for installation and electrical connections.
Automatic Pump Models
Models with a float switch include two power cords with a piggyback plug on the switch
cord. For automatic operation, plug the pump cord into the switch cord. Plug the switch
cord (with pump cord attached) into a GFCI outlet.
Manual Pump Models
Manual pumps are plugged into a dedicated GFCI receptacle and are controlled by either
by switching the power or by unplugging the cord.
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 manual operation and disconnected from power before the pump runs dry.
Manual pumps can be converted to automatic mode by installing a separate liquid level control. Install
according to the manufacturer’s instructions.
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.
• In a 200-208 and 230 VAC direct wire installation, one side of the line going to the pump is always
electrically energized, regardless of whether the liquid level control switch is open or closed. To
avoid hazards when installing or servicing, install a double-pole disconnect near the pump installa-
tion.
• 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.