Keen Pump 2hp BG2 Series Quick guide

1 P/N O&M-BG2GRINDER
_________________________________________________________________________________
INSTALLATION AND SERVICE INSTRUCTIONS
AND REPAIR PARTS LIST FOR 2HP CENTRIFUGAL
“BUILDER’S GRADE”
SUBMERSIBLE GRINDER SEWAGE PUMPS

2 P/N O&M-BG2GRINDER
01/2016
MODELS: 2hp “BG2” Series
BG2-21
200 / 230 Volt, 1- Phase

3 P/N O&M-BG2GRINDER
Read all instructions in this manual before operating pump.
Most accidents can be avoided by using COMMON SENSE.
Please read this before installing or operating pump. This
information is provided for SAFETY and to PREVENT
EQUIPMENT PROBLEMS. To help recognize this information,
observe the following symbols:
IMPORTANT! Warns about hazards that can
Result in personal injury or indicates factors
concerned with assembly, installation,
operation, or maintenance which could result
in damage to the machine or equipment if
ignored.
CAUTION! Warns about hazards that can or will cause minor
personal injury or property damage if ignored. Used with
symbols below.
WARNING! Warns about hazards that can or will cause
personal injury, death, or major property damage if ignored.
Used with symbols below.
Hazardous fluids can Extremely hot - Severe
cause fire or explos- burns can occur on
Ions, burns or death contact.
could result.
Biohazard can cause Hazardous fluids -
Serious personal injury. Pressure, eruptions or
Explosions could cause
Rotating machinery. Injury or property damage.
Amputation or severe
laceration can result. Hazardous voltage can
shock, burn or cause death.
Only qualified personnel should install, operate and repair pump.
Any wiring of pump should be performed by a qualified
electrician.
WARNING! To reduce risk of electrical shock, pumps
and control panels must be properly grounded in
accordance with the National Electric Code (NEC) or the
Canadian Electrical Code (CAC) and all applicable state,
province, local codes and ordinances.
WARNING! To reduce risk of electrical shock, always
disconnect the pump from power source before
handling or servicing. Lock out power and tag.
Prevent large articles of clothing, large amounts of chemicals,
other materials or substances such as are uncommon in
domestic sewage from entering the system.
During power black-outs, minimize water consumption at the
home(s) to prevent sewage from backing up into house.
Always keep the shut-off valve completely open when system is
in operation (unless advised otherwise by proper authorities).
Before removing pump from basin, be certain to close shut-off
valve. (This prevents backflow from pressure sewer).
Keep control panel locked or confined to prevent unauthorized
access.
If pump is idle for long periods of time, it is advisable to start
pump occasionally by adding water to basin.
CAUTION! Pumps build up heat and pressure
during operation –allow time for pumps to cool
before handling or servicing.
WARNING! DO NOT pump hazardous materials
(flammable, caustic, etc.) unless pump is specifically
designed and designated to handle.
Do not block or restrict discharge hose/pipe, as hose/pipe may
“whip” under pressure.
WARNING! DO NOT wear loose clothing which may
become entangled in impeller or other moving parts.
WARNING! Keep clear of suction and discharge
openings. DO NOT insert fingers in pump with power
connected.
Make sure lift handles are securely fastened each time before
lifting. Do not operate pump without safety devices in place.
Always replace safety devices that have been removed during
service or repair.
Do not exceed manufacturer’s recommendation for maximum
performance, as this could cause motor to overheat.
Secure pump in its operating position so it does not tip over, fall
or slide.
Cable should be protected at all times to avoid punctures, cut,
bruises and abrasions –inspect frequently.
Never handle connected power cords with wet hands.
To reduce risk of electrical shock, all wiring and
junction connections should be made per NEC or
CEC and applicable state or province and local codes.
Requirements may vary depending on usage and
location.
Submersible pumps are NOT APPROVED for use in
swimming pools, recreational water installations,
decorative fountains or any installation where human
contact with the pumped fluid is common.
Do not remove cord and strain relief. Do not connect conduit to
pump.
Products returned must be cleaned, sanitized, or
decontaminated as necessary prior to shipment. To
insure that employees will not be exposed to health
hazards in handling said material, all applicable laws
and regulations shall apply.
Bronze/brass and bronze/brass fitted pumps may contain lead
levels higher than considered safe for potable water systems.
Various government agencies have determined that leaded
copper alloys should not be used in potable water applications.

4 P/N O&M-BG2GRINDER
For non-leaded copper alloy materials of construction, please contact factory.
KEEN PUMP is not responsible for losses, injury or death resulting from a failure to observe these
safety precautions, misuse, abuse or misapplication of pumps or equipment.
WARNING!
THE PUMP MUST BE WIRED BY A QUALIFIED
ELECTRICIAN, USING AN APPROVED STARTER
BOX AND SWITCHING DEVICE.
On 3 phase pumps only, “Motor Protection”
must be provided by the installer. All 3 phase
pumps must be installed with magnetic starters
having 3 leg overload protection in accordance
with the NEC (National Electric Code). For
duplex installations, both pump motors must
have separate overload protection.
Pumps with seal leak detectors must be
connected to the proper control circuitry.
DANGER!
HAZARDOUS MOVING PARTS. To reduce risk of
injury, disconnect power before servicing. Never
put fingers near grinder impeller or in pump inlet
when pump cord is connected or pump is
operating.
For use with maximum 140 degrees F liquid.
DANGER!
In the initial installation, before sewage is
admitted to the basin, there is no danger on
entering the basin. AFTER SEWAGE HAS BEEN
IN THE BASIN, THERE IS DANGER. Sewage
water produces methane and hydrogen sulfide
gasses, both of which are highly poisonous. A
breathing device may be required. Never enter
the basin unless cover is open and outside
blower is used to force fresh air into the basin.
Also the worker in the basin must wear a
harness attached to the surface so he can be
pulled out in case of asphyxiation.
NEVER WORK ALONE!
WARNING!
Do not exceed working load limit of lifting chain,
cable or rope. Do not use lifting chain, cable or
rope where failure could result in loss of life.
Examine all lifting devices, chain, cable or rope
for damage before and after each lift. Do not use
any lifting devices that are not rated for and
designed to lift the weights involved with these
pumps. DO NOT LIFT PUMP BY POWER CORD.
Do not install or remove pump with person(s) in
the basin.
This pump is designed to handle materials
which could cause illness or disease through
direct exposure. Wear and use protective
clothing when working on the pump or piping.
WARNING !
Any wiring to be done on pumps should be
done by a qualified electrician.
NEVER operate a pump with a power cord that
has frayed or brittle insulation.
NEVER let cords or plugs lay in water.
NEVER handle connected power cords with
wet hands.
NEVER be in contact with the liquid being
pumped while pump cord is connected to
electrical supply.
Only qualified personnel should install, operate
or repair pump.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * USE AND CARE * * * * * * * * * * * *
DO NOT pump hazardous material not
recommended for pump. NEVER introduce:
Explosives
Flammable Material
Lubricating Oil and/or Grease
Chemicals, Solvents, etc.
Gasoline
Any Petroleum Product
Regulatory agencies advise that the following
items should not be introduced into any sewer:
Glass
Metal
Diapers
Clothing, socks, rags, etc.
Plastic objects (toys, utensils, etc.)
Sanitary napkins or tampons
DO NOT pump without safety devices in place.
For hazardous locations, use pumps listed and
classified for such locations.
DO NOT use non-explosion rated pumps in locations
considered hazardous in accordance with the
National Electric Code, ANSI/NFPA 70-1993.
IMPORTANT!
KEEN PUMP is not responsible for losses, injury or
death resulting from failure to observe these safety
precautions.

5 P/N O&M-BG2GRINDER
PUMP SPECIFICATIONS: WIRING DIAGRAMS
BG2-21, 200/230 VOLT, 1-PHASE

6 P/N O&M-BG2GRINDER
PUMP SPECIFICATIONS
DISCHARGE…………………………. 1-1/4” NPT, Vertical
LIQUID TEMPERATURE…………… 120 degrees F (Continuous)
140 degrees F. (Intermittent)
MOTOR HOUSING………………….. Cast Iron, ASTM A-48, Class 30
CORD CAP…………………………… Cast Iron, ASTM A-48, Class 30
VOLUTE………………………………. Cast Iron, ASTM A-48, Class 30
SEAL PLATE…………………………. Cast Iron, ASTM A-48, Class 30
IMPELLER……………………………. Ductile Iron, ASTM A-48, Class 35B
12 vane, Vortex with Pump-out Vanes, Dynamically Balanced
SHREDDING RING………………….. Hardened 440C Stainless Steel
56-60 Rockwell C
GRINDER IMPELLER………………. Hardened 440C Stainless Steel
56-60 Rockwell C
SHAFT………………………………… 416 Stainless Steel
SHAFT SEAL………………………… Mechanical Main (Motor) Secondary (Pump)
Silicon Carbide –Rotating Face Silicon Carbide –Rotating Face
Silicon Carbide –Stationary Face Silicon Carbide –Stationary Face
Buna-N - Elastomer
300 Series Stainless Steel - Hardware
BEARING (UPPER)………………… Single Row, Ball, Oil Lubricated
BEARING (LOWER)………………... Single Row, Ball, Oil Lubricated
HARDWARE…………………………. 300 Series Stainless Steel
O-RINGS……………………………… Buna-N
CORD…………………………………. 12 AWG –3C (Single Phase), Type SOOW
20’ Length Standard. Other Lengths Available.
CORD ENTRY………………………. Triple Sealed Design
Compression Grommet –Outer Jacket Seal
Epoxy Potted –Inner Conductor Seal
Butt Connector –Inner Wire Strand Wicking Blockage
MOTOR (SINGLE PHASE)………… 2 HP, 3450 RPM, 60 Hz
Dual Voltage 208 / 230
Includes Overload Protection in the Motor.
Oil Filled, Class F
Capacitor Start / Capacitor Run
Start Capacitor Run Capacitor
BG2-21……………………………….. 216 mfd, 250 VAC 20 mfd, 370 VAC
OPTIONAL EQUIPMENT……………Seal Materials
Additional Cable Lengths
Impeller Trims

7 P/N O&M-BG2GRINDER
Installation
USAGE:
The 2 HP grinder pumps are for pumping
domestic sewage. One pump can handle the
sewage from a maximum of 2 homes.
These pumps are not to be used for
pumping commercial or industrial sewage
from factories, schools, motels, apartments,
etc..
This pump is intended to grind and pump all
normal sewage for home use. It will handle
reasonable quantities of disposable diapers,
sanitary napkins, paper towels, rubber
material, wood, cigarette butts, string,
plastic and other material not normally
found in sewage.
CAUTION!
Pump is not to be disassembled in the field
except at certified service stations or at the
factory. Warranty is void if pump is taken
apart for any reason other than to replace
grinder impeller and grinder ring, which is
covered in these instructions.
PACKAGING
Each pump is packaged with 20 feet of
power cord in a carton that is marked with
the Model Number. Longer cords are
available –consult factory.
INSPECTING PUMP
Before making any piping or electrical
connections, check pump for any shipping
damage. Turn grinder impeller to be sure it
is free. DO NOT TURN IMPELLER WITH
FINGERS AS EDGES ARE SHARP. Use allen
wrench in the impeller screw to turn the
impeller.
CAUTION!
No persons should be in the basin when
pump is lowered into position! DO NOT lift
pump in a manner where failure could result
in loss of life.
After pump is installed in basin, NEVER
WORK ON MOTOR OR GRINDER UNIT
WITHOUT DISCONNECTING MOTOR LEAD
WIRES FROM CONTROL PANEL. DO NOT
RELY UPON OPENING THE CIRCUIT
BREAKER ONLY!
ELECTRICAL:
MOTOR OVERLOAD PROTECTION
Single phase motors are provided with an
on-winding thermal overload switch. If
motor overloads or overheats for any
reason, the switch opens, stopping motor.
As soon as the motor cools to normal
temperature, the switch automatically
closes and restarts motor.
MOTOR POWER CORDS
The three power conductors are BLACK,
WHITE and RED. GREEN conductor
connects to the ground screw inside the
cord cap.
For single phase,
BLACK is “Common”
WHITE is “Run”
RED is “Start”.
IMPORTANT!
Ground wires must be connected in the
control box to grounding bar, which is
connected to a good suitable ground.
MOTOR IS NOT SAFE UNLESS PROPERLY
GROUNDED.
IMPELLER ROTATION:
When looking at the bottom of the pump
and through the inlet of the volute, rotation
of the impeller is COUNTER-CLOCKWISE.

8 P/N O&M-BG2GRINDER
TROUBLESHOOTING
The troubles listed below are potential problems involving the pump. Other troubles can occur from
faulty control box operation. Consult control box instructions for troubleshooting list involving the
control box.
PROBLEM PROBABLE CAUSE
Pump will not run. Tripped breaker, blown fuse, poor electrical connection, interruption of
power, improper power supply.
Float switch defective or restricted.
On single phase pumps, electronic start switch or capacitors blown.
Overload in motor tripped.
Solid material lodged in pump inlet.
Pump runs, but does not Pump impeller may be air locked. Start and stop pump several times to
pump liquid from basin. purge air. Check to ensure vent hole in volute is open and clean.
Lower “OFF” float may be set too low, allowing air into pump.
Pump inlet or valves in discharge pipe may be clogged.
Discharge valve may be closed.
Pump hums, but does not run. Incorrect voltage.
Pump inlet plugged.
Cutter jammed or loose on shaft, worn or damaged.
Pump delivers low volume Low voltage.
of water. Discharge restricted.
Check valve stuck closed or installed backwards.
Pump motor damaged / worn.
Pump may be air locked.
Cutter loose or jammed on shaft, worn or damaged.
Pump is noisy. Grinder impeller may be rubbing against grinder ring due to
misalignment, bent shaft or object stuck in impeller.
Grinder assembly may be partially clogged.
Pump cavitation due to low discharge pressure.
Pump cycles frequently. Check valve stuck closed or installed backwards.
Ground water entering basin.
Fixtures are leaking.
Pump will not turn off. Float switch defective or movement restricted.
H-O-A switch in panel is in “HAND” position.
Pump may be air locked.
Excessive inflow / pump not sized for the application.
Grease and solids Pump “ON” switch may be set too high.
accumulated in basin and Debris may have accumulated around lower float weight causing pump
will not pump out. to turn off too soon. Clean debris away from weight and cord.
Red light illuminated at Moisture detection in double seal pumps indicating service is required.
control box. Lower seal has failed. Secondary seal still functioning.
Circuit breaker trips. Electrical short to ground.
Check troubleshooting in control panel before pulling pump.
Check all electrical cords for damage.
Pull pump and take resistance readings of motor to determine if problem
is in the pump or control box.

9 P/N O&M-BG2GRINDER
REPLACING GRINDER IMPELLER AND SHREDDING RING
Note: This is the only disassembly operation permitted in the field.
All other repairs must be performed at an authorized service center or the factory.
STANDARD TOOLS REQUIRED:
Standard socket wrench set.
Standard set of open end wrenches.
Hammer.
Vise grip pliers.
Allen head socket set.
Screwdrivers.
Wire brush.
CAUTION –Disconnect all power and control wires to motor at the control panel before starting
the disassembly operations. Do not rely upon opening the circuit breaker only.
IMPORTANT –Pump should be sanitized with bleach before starting work.
Pump should be thoroughly cleaned of trash and deposits before starting
disassembly operations.
Wear protective gloves and clothing.
Always use a rag on the impeller when turning to prevent cutting hands on the
sharp edges of the shredding ring.
DISASSEMBLY OF SHREDDING RING AND GRINDER IMPELLER
1. Hold the grinder impeller by prying against the impeller cutting bar and remove the allen head
cap screw from the end of the shaft.
2. Use a large screwdriver in the slot end of the shaft and tap (counterclockwise) on one of the
large cutter vanes with a hammer. Tap in a counterclockwise direction (thread is right hand).
3. If the impeller removes easily, clean and replace if worn.
4. Make sure the pump impeller has not loosened when the grinder impeller was removed. This
can be checked on reassembly of grinder impeller and shredding ring. The tips of the impeller
cutter vanes should extend 1/8” below the bottom of the shredding ring. If the distance is
greater, the pump impeller has loosened. If the distance is less, the shredding ring is not
properly seated.
5. After the volute case has been removed, insert screwdriver in slot end of shaft and tap hammer
against the outer vane of the ductile iron pump impeller (clockwise) to ensure it is threaded tight
against shoulder on shaft.
6. Use large screwdriver to tap stainless steel cutter ring from cast iron volute.
7. Clean all threads with a wire brush and file smooth any nicked threads. Use NEVER-SEEZE or
other graphite compound on threads before replacing grinder impeller.
8. Make sure allen head cap screw in bottom of pump shaft is tight. Make sure the impeller turns
freely by hand after reassembly. Some drag will be present due to the shaft seals. There should
not be any binding or tight spots when turning the grinder impeller.

10 P/N O&M-BG2GRINDER
PARTS LIST “BG2-21”

11 P/N O&M-BG2GRINDER
Pump Model Numbers
BG2-21
REF. #
DESCRIPTION
QTY.
PART NUMBER
2 HP Castings, Non-X proof, Non-C Pumps
1
KGA2173
1
Bearing Plate, Upper, Cast Iron
1
KGA2070
2
Housing, Lower Bearing, Cast Iron
1
KGA2011
3
Seal Plate, Lower, Cast Iron
1
KGA2014
4
Volute Case, Cast Iron
1
KG2015
5
Adapter, Discharge, 1-1/4" NPT, Cast iron
1
KG2026
6
Flange, Grinder ring, Cast iron
1
KG2063
2 HP Repair parts kit (PKX-KG1)
1
KGX2175
7
Seal, Shaft, Lower and Upper, Sil. Carbide, Type 21
2
KG2172
8
O-Ring, Buna-N, Motor, Cord Cap, Brg. Hsg.,5-7/8 OD
4
KG2010
9
O-Ring, 2hp volute adapter, Buna-N, 1-7/8 OD
1
KG2025
10
Square ring, Buna N, K(H)G Volute, 6.012 OD
1
KG2016
11
Bearing, Ball, Upper Ball, 1.575OD
1
KG2003
12
Bearing, Ball, 2hp LOWER, 3-7.5hp UPPER, 2.047OD
1
KG2009
2 HP Hardware & Miscellanies parts
1
KG2174
13
Screw, Cap, 1/2-13UNC x 1" LG, SST
2
CS1/2X1SS
14
Screw, Cap, 5/16-18UNC x 1-3/4" LG, SST
4
CS5/16X1-3/4SS
15
Screw, Cap, 5/16-18UNC x 1-1/4" LG, SST
6
CS5/16X1-1/4SS
16
Screw, Cap, 5/16-18UNC x 1-3/8" LG, SST
4
CS5/16X1-3/8SS
17
Screw, Allen HD, 5/16-18UNC x 1" LG, SST
4
SCS5/16X1SS
18
Screw, Allen HD, 1/4-20UNC x 5/8" LG, SST
1
SCS1/4X5/8SS
19
Screw, Cap, 1/4-20UNC x 1" LG, SST
3
CS1/4X1SS
20
Washer, Flat 5/16", 300 series SST
2
WASH5/16SS
21
Retaining Ring, Black- Finish Steel, External
1
KG2089
23
Disc Retainer Ring, 2hp grinder impeller, 304 SST
1
KG2024
24
Disc Spring, wave, steel
1
KG2118-1
25
Handle, Lifting, SST
1
KG2017
26
Oil, KEEN I.C.E. Dielectric
68 oz
K0181-1-01
Assy, Housing/Stator 208 & 230V
1
KGA2097
27
Housing, motor, Cast iron
1
KGA2006
28
Stator 208 & 230 V
1
KG2007
29
Assy, Cord Cap, 2HP Grinder, 20 ft. length cord.
1
KG2099-12320
30
Rotor and shaft assembly 2 hp, 1 & 3 phase , Hazloc
1
KGX2096
31
Pre-insulated Crimp Wire Connector 6LU60
4
WC2-14
32
Impeller, Cast Iron
1
KG2018-01
33
Ring, Grinder, SST
1
KG2149-2-01
34
Impeller, Grinding, SST
1
KG2019-2-01
37
Plug, 1/4" NPT pipe, SST
3
PLUG1/4
38
Bushing, bronze, 48 FRM grinder
1
KGX2014-B

12 P/N O&M-BG2GRINDER
471 US Hwy 250 East, Ashland, Ohio 44805
PH: 419-207-9400 FX: 419-207-8031
Limited Warranty
During the time periods and subject to the conditions hereinafter set forth, Keen Pump will repair or replace to the
original user or consumer, any portion of your new Keen product which proves defective due to defective materials
or workmanship of Keen Pump. Contact your closest authorized Keen Pump representative or distributor for
warranty service. At all times, Keen Pump shall have and possess the sole right and option to determine whether to
repair or replace defective equipment, parts or components. Damage caused by acts of GOD or conditions beyond
the control of Keen Pump is not covered by this warranty.
WARRANTY PERIOD:
36 months from date of manufacture.
Start-up reports are required to support warranty claims. Warranty effective only if Keen Pump supplied or
authorized control panels are used. Single phase pumps must utilize Keen Pump supplied start components.
THIS WARRANTY WILL NOT APPLY:
(1) To defects or malfunctions resulting from failure to properly install, operate or maintained the product in
accordance with printed instructions provided.
(2) To failures resulting from abuse, accident or negligence.
(3) To normal maintenance services and the parts used in conjunction with such service.
(4) To products which are not installed in accordance with applicable local codes, ordinances and good trade
practices.
(5) The product is used for purposes other than for what is was designed and manufactured.
(6) If 3 phase motors are installed on a single phase power supply using a phase converter or if 3 phase power
is supplied by only two transformers, making an open Delta system.
WARRANTY EXCLUSIONS:
Keen Pump specifically disclaims the implied warranties of merchantability and fitness for a particular purpose
after the termination of the warranty period set forth herein. No warranties or representations at any time made by
any representatives of Keen Pump shall vary or expand the provision hereof.
LIABILITY LIMITATION:
In no event shall Keen Pump be liable or responsible for consequential, incidental or special damages resulting from
or related in any manner to any Keen Pump product or parts thereof. Personal injury and/or property damage
may result from improper installation. Keen Pump disclaims all liability, including liability under this warranty,
for improper installation. Keen Pump recommends following the instructions in the installation manual. When in
doubt, consult a professional. Some states do no allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you.
LABOR, ETC., COSTS:
Keen Pump shall in no event be responsible or liable for the cost of field labor or other charges incurred by any
customer in removing and/or reaffixing any Keen Pump product, part or component thereof or any temporary
pumping of other equipment.
RETURNED OR REPLACED COMPONENTS:
Any item to be replaced under this Warranty must be returned to Keen Pump, or such other place as Keen Pump
may designate, freight prepaid.
This warranty gives you specific legal rights and other rights which may vary from state to state.
In the absence of suitable proof of this purchase date, the effective date of this warranty will be based upon the date
of manufacture. Example: 0105 = Month-Year = January, 2005.