Zoeller 71 HD Series User manual

© Copyright 2023 Zoeller®Co. All rights reserved.
MAIL TO: P.O. BOX 16347 • Louisville, KY 40256-0347
SHIP TO: 3649 Cane Run Road • Louisville, KY 40211-1961
Tel: [phone] • 1 (800) 928-PUMP
Visit our website:
zoellerengineered.com
Product information presented
here reects conditions at time
of publication. Consult factory
regarding discrepancies or
inconsistencies.
SECTION: Z4.20.140
ZM1789
0123
Supersedes
1222
Congratulations on the purchase of the Zoeller 71 Series submersible
grinder pump. Zoeller Grinder Pumps are designed for grinding and pumping
sanitarysewagefromsubmersibleliftstations. Thepumpisintendedtogrind
andpumpreasonable quantitiesofdisposablediapers, sanitarynapkins,paper
towels, rubber materials, plastics, cigarette butts and other items normally
found in sanitary sewage applications. Since 1939, the name Zoeller has
represented the standard for submersible dewatering and sewage pumps.
The same high quality workmanship and easy maintenance design has
been incorporated into this line of heavy-duty submersible grinder pumps.
This Zoeller pump will provide years of trouble-free service when installed
according to the manufacturers’ recommendations.
OWNER’S MANUAL
71 HD SERIES SUBMERSIBLE GRINDER UNITS
FAMILY OWNED
PROUD
AMERICAN
Thismanualincorporatestheinstallation, operation, maintenance, and
service instructions into one document to aid in the ownership of a Zoeller
submersiblewastewaterproduct.Pleasereadand review this manual before
installing the product. Follow the steps and procedures listed on ZM1074 for
a proper start-up. Many items contained within, when followed correctly,
will not only ensure a long and problem-free life for the pump, but also save
time and money during installation. Reference ZM1788 for repair manual on
71 Series Grinder Pumps. Should further assistance be necessary please
call our Product Support Department at 1-800-928-PUMP (7867).
TABLE OF CONTENTS
Safety Instructions ........................................................................1
Limited Warranty...........................................................................2
Preinstallation Information..........................................................3
Electrical Data ...............................................................................3
Typical Sewage Installation ......................................................4
Pump Wiring Instructions........................................................ 5-6
Operation.........................................................................................7
Maintenance ..................................................................................7
Service Checklist ..........................................................................8
SAFETY INSTRUCTIONS
TO AVOID SERIOUS OR FATAL PERSONAL INJURY OR MAJOR
PROPERTY DAMAGE, READ AND FOLLOW ALL SAFETY
INSTRUCTIONS IN THIS MANUAL AND ON THE PUMP.
THISMANUALISINTENDED TOASSISTINTHE INSTALLATION
AND OPERATION OF THIS UNIT AND MUST BE KEPT WITH
THE PUMP.
This is a SAFETY ALERT SYMBOL.
When you see this symbol on the pump or in the
manual, look for one of the following signal words
and be alert to the potential for personal injury or
property damage.
Warns of hazards that WILL cause serious personal
injury, death or major property damage.
Warns of hazards that CAN cause serious personal
injury, death or major property damage.
Warns of hazards that CAN cause personal injury or
property damage.
INDICATES SPECIAL INSTRUCTIONS WHICH ARE
VERY IMPORTANT AND MUST BE FOLLOWED.
THOROUGHLY REVIEW ALL INSTRUCTIONS AND WARNINGS
PRIOR TO PERFORMING ANY WORK ON THIS PUMP.
MAINTAIN ALL SAFETY DECALS.
CAUTION
OWNER’S INFORMATION
REFER TO WARRANTY ON PAGE 2.
ModelNumber:_______________DateCode: ______________
SerialNumber: Pump1_____________ Pump 2_____________
Simplex Panel P/N _____________________________
Duplex Rail System P/N ________________________
Job Name: ____________________________________________
Distributor: ____________________________________________
Sales Order Number: ____________________________________
Contractor: ____________________________________________
Date of Installation: _____________________________________
System Readings During Operation: Voltage_____ Amps______
NOTICE TO INSTALLER:
Instructions must remain with
installation.

2
© Copyright 2023 Zoeller®Co. All rights reserved.
LIMITED WARRANTY
*MUNICIPAL SEWAGE PERMANENT INSTALLATION
Five Year (10,000 hr) Months After Shipment - Limited Warranty
MONTHS 0-18 19-30 30-45 46-60
HOURS 0-3,000 3,000-5,000 5,000-7,500 7,500-10,000
Rotor & Stator 0% 30% 50% 80%
Mechanical Seal 0% 30% 50% 75%
Impeller 0% 30% 50% 80%
Cutter Assy. 0% 30% 50% 80%
Ball Bearings 0% 50% 80% 100%
Pump Housing 0% 30% 50% 100%
Controls and accessories included for 18 months.
Manufacturer warrants, to the purchaser and subsequent owner during the
warranty period, every new product to be free from defects in material and
workmanship under normal use and service, when properly used and maintained,
for a period of one year from date of purchase by the end user, or 18 months from
date of original manufacture of the product, whichever comes rst. Parts that fail
within the warranty period, one year from date of purchase by the end user, or 18
months from the date of original manufacture of the product, whichever comes
rst, that inspections determine to be defective in material or workmanship, will
be repaired, replaced or remanufactured at Manufacturer's option, provided
however, that by so doing we will not be obligated to replace an entire assembly,
theentiremechanism or thecompleteunit. Noallowance willbemadefor shipping
charges, damages, labor or other charges that may occur due to product failure,
repair or replacement.
This warranty does not apply to and there shall be no warranty for any material
or product that has been disassembled without prior approval of Manufacturer,
subjectedtomisuse, misapplication,neglect,alteration,accidentoruncontrollable
act of nature; that has not been installed, operated or maintained in accordance
with Manufacturer's installation instructions; that has been exposed to outside
substances including but not limited to the following: sand, gravel, cement, mud,
tar, hydrocarbons, hydrocarbon derivatives (oil, gasoline, solvents, etc.), or other
abrasiveorcorrosive substances,washtowelsorfeminine sanitaryproducts,etc.
in all applications other than in raw sewage pumping applications. The warranty
set out in the paragraph above is in lieu of all other warranties expressed or
implied; and we do not authorize any representative or other person to assume
for us any other liability in connection with our products.
ContactManufacturerat,3649CaneRunRoad,Louisville,Kentucky 40211,Attention:
Customer Support Department to obtain any needed repair or replacement of
part(s) or additional information pertaining to our warranty.
MANUFACTURER EXPRESSLY DISCLAIMS LIABILITY FOR SPECIAL,
CONSEQUENTIAL OR INCIDENTAL DAMAGES OR BREACH OF EXPRESSED
OR IMPLIED WARRANTY; AND ANY IMPLIED WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE AND OF MERCHANTABILITY SHALL BE LIMITED TO THE
DURATION OF THE EXPRESSED WARRANTY.
Some states do not allow limitations on the duration of an implied warranty, so
the above limitation may not apply to you. Some states do not allow the exclusion
or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you.
This warranty gives you specic legal rights and you may also have other rights
which vary from state to state.
LIMITATIONS
RECOMMENDED LIMITS OF APPLICATION
These recommended application limits are for pump stations pumping to a gravity main. Low-pressure pipe systems should be designed with a pump located at each
house. For applications where a lift station would handle more than 60 homes, a solids handling type pump should be considered.
*Zoeller Company does not recommend a simplex station on anything over two homes in order to maintain continuous service during unusual conditions.
Simplex Station Duplex Station
Model HP Homes GPD Homes GPD
7110 High Head 3 2* 800 20 8,000
7111 High Head 5 2* 800 25 10,000
7112 High Head 7.5 2* 800 30 12,000
7110 Reversing 3 2* 800 30 12,000
7111 Reversing 5 2* 800 38 15,000
7112 Reversing 7.5 2* 800 45 18,000
7110 High Flow 3 2* 800 40 16,000
7111 High Flow 5 2* 800 50 20,000
7112 High Flow 7.5 2* 800 60 24,000
Zoeller Engineered Products warrants its 71 Series of submersible pumps to the
original owner to be free from defects in workmanship and materials under the
followingconditionsand limitations. Theownerwillpay theapplicablepercentage
of the list price of the following parts in effect at time of replacement.
Conditions
1. Approval of the installation and start-up of the equipment by the authorized
Zoeller representative.
2. Pump removal, reinstallation and transportation charges shall be borne by the
owner.
3. Warrantyrepairsshall be conductedbyanAuthorized WarrantyServiceCenter
(ASWC) only. Any pump repair labor charges done after the warranty period
will be borne by the owner.
4. Hazardous Location Series pumps must be serviced at an approved service
station or returned to the factory.
5. Controls and accessories warranty (See specic warranty below).
STANDARD WARRANTY
Standard warranty shall be 18 months from date of manufacture, 12 months from
date of purchase or 12 months from the date of start-up with a start-up report
on le with Zoeller. Failure to have this start-up report on le with Zoeller will
void this warranty.
In instances where property damages are incurred as a result of an alleged product failure, the property
owner must retain possession of the product for investigation purpose.

3
© Copyright 2023 Zoeller®Co. All rights reserved.
PREINSTALLATION INFORMATION
1. Check to be sure your power source is capable of handling the voltage
requirements of the motor, as indicated on the pump nameplate.
2. The oat switches must be connected to an intrinsically safe circuit in the
control panel. The installation of pumps using auxiliary variable level oat
switches is the responsibility of the installing party and care should be
taken that the tethered oat switch will not hang up on the pump apparatus
or pit peculiarities and is secured so that the pump will shut off. It is recom-
mended that rigid piping and ttings be used and the pit be 36" or larger in
diameter.
3. INFORMATION - VENT HOLE PURPOSE. It is necessary that all submersible
pumpscapable of handling various sizes of solid wastebeofthe bottom intake
design to reduce clogging and seal failures. If a check valve is incorporated
in the installation, a vent hole (approx. 3/16") must be drilled in the discharge
pipe below the check valve and pit cover to purge the unit of trapped air.
Water stream will be visible from this hole during pump run periods. This vent
hole should be checked periodically for clogging and cleaned as necessary.
Trapped air is caused by agitation and/or a dry basin.
4. Water hammer creates momentary high pressure surges. These surges can
cause severe damage to check valves and the piping system. Consideration
for water hammer must be included in the piping system design. Reference
ASPE Data Book, Chapter 2.33. Some systems may require external spring
or lever weighted check valves or other engineered solutions.
5. Three phase pumps must be connected for proper rotation, which is counter-
clockwise looking into impeller inlet. See page 5 for instructions for checking
3 phase rotation.
6. Grinder installations should be checked frequently for debris and/or buildup
which may interfere with the “ON”/”OFF” cycles or the positions of variable
level oat control switches. For repair and service, other than cutter assembly
maintenance, contact factory.
7. Care should be taken during the initial installation to be sure that adequate
air supply is available whenever any person is in the basin. Always follow
OSHA guidelines on conned space requirements.
1. Inspect your pump. Occasionally, products are damaged during shipment. If the unit is damaged, contact your dealer before using. DO NOT remove the test
plugs in the cover nor the motor housing.
2. Carefully read the literature provided to familiarize yourself with specic details regarding installation and use. These materials should be retained for future
reference.
1. Do not lift, carry, or hang pump by the electrical cables. Damage to the electrical
cables can cause shock, burns or death.
2. Make sure there is a properly grounded connection available. All pumps are
furnished with provisions for proper grounding to help protect you against the
possibility of electrical shock.
3. Make certain that the control box is within the reach of the pump’s power supply
cord. DO NOT USE AN EXTENSION CORD. Extension cords that are too long or
too light do not deliver sufcient voltage to the pump motor. But, more important,
they could present a safety hazard if the insulation were to become damaged or
the connection end were to fall into the sump.
4. Make sure the pump electrical supply circuit is equipped with fuses and
disconnect or circuit breakers of proper capacity. A separate branch circuit is
recommended, sized according to the “National Electrical Code” for the current
shown on the pump nameplate.
5. Risk of electric shock - These pumps have not been investigated for use in
swimming pool areas.
6. AccordingtothestateofCalifornia(Prop65),thisproductcontains chemicalsknown
to the state of California to cause cancer and birth defects or other reproductive
harm.
7. Do not attempt to turn cutter rotor located on bottom of the unit with
ngers.Usethe appropriatelysizedwrenchwhen checkingorremoving
the cutter.
8. Risk of Explosion- Pump not to be installed in locations classied as hazardous
by the NEC, ANSI/NFPA 70.
9. Risk of Eletric Shock- Do not remove cord and strain relief. Do not connect conduit
to pump.
NOTE: Pumps with the "UL" mark and pumps with the "US" mark are tested to UL Standard
UL778. CSA Certied pumps are certied to CSA Standard C22.2 No. 108.
CAUTION
SEE BELOW FOR
LIST OF CAUTIONS
SEE BELOW FOR
LIST OF WARNINGS
ELECTRICAL DATA
Amps Winding
Service Locked KVA Resistance
Model HP Factor RPM Voltage Phase Hertz Full Load In Air Shut Off Rotor Code Line-to-Line
E7110 3 1.2 3450 230 1 60 23.6 7.2 13.1 132 M 0.5/3.5
J7110 3 1.2 3450 200 3 60 17.3 5.7 10.7 66 J 0.8
F7110 3 1.2 3450 230 3 60 15.1 5.0 9.2 57 J 1.0
G7110 3 1.2 3450 460 3 60 7.5 2.5 4.6 28.5 J 4.0
BA7110 3 1.2 3450 575 3 60 6.0 2.3 3.1 25.2 K 6.6
E7111 5 1.2 3450 230 1 60 28.0 7.2 17.1 132 G 0.5/3.5
J7111 5 1.2 3450 200 3 60 20.7 7.6 14.4 94 E 0.44
F7111 5 1.2 3450 230 3 60 18.0 6.2 13.0 82 E 0.62
G7111 5 1.2 3450 460 3 60 9.0 3.1 6.5 41 E 2.4
BA7111* 5 1.2 3450 575 3 60 7.2 2.9 5.2 36 J 3.4
J7112 7-1/2 1.2 3450 200 3 60 25.3 7.6 18.4 94 D 0.44
F7112 7-1/2 1.2 3450 230 3 60 22.0 6.2 16.0 82 D 0.62
G7112 7-1/2 1.2 3450 460 3 60 11.0 3.1 8.0 41 D 2.4
BA7112* 7-1/2 1.2 3450 575 3 60 9.0 2.9 6.5 36 E 3.4
*Obsolete as of 1/2023

4
© Copyright 2023 Zoeller®Co. All rights reserved.
3
1
44
77
10
810
2
11
14
6
13
9
6
12
5
15
TYPICAL GRINDER PUMPING SYSTEM INSTALLATION
(8) Secure power cord to avoid entanglement with variable level
oat switch mechanism.
(9) Do not reduce pump discharge pipe below 2” IPS size.
(10) Basin must be in accordance with all applicable codes
and specications. Basin must be sized to allow a minimum
6-minute off time between starts.
(11) Pump must be level and the tethered variable level oat switches
must be free and not hang up on pump or pit peculiarities.
(12) Ifarailsystemisused,dischargeelbowmust be rmly anchored
to the bottom of basin. In berglass basin, the bottom will need
to be reinforced if the discharge elbow is used.
(13) If a rail system is used, the guide rails are 2” schedule 40 pipe
for all anged-discharge grinder pumps. Brass, stainless steel
or galvanized steel is recommended.
(14) Install ring and cable for lifting pump from pit.
(15) Basin must be clean and free of debris after installation and
before operation.
ZEPA0521
All installations must comply with all applicable
electrical and plumbing codes, including, but not
limitedto,NationalElectricalCode,local,regional,
and/or state plumbing codes, etc.
(1) Electrical wiring and protection must be in accordance with the
National Electrical Code, and any other applicable state and local
electrical requirements.
(2) Install proper full ow check and shut-off valve.
(3) Install proper controls. (Outdoor panels require NEMA 3R or 4X
enclosure)
(4) Allinstallationsrequirea basin cover to preventdebrisfromfalling
into the basin and to prevent accidental injury.
(5) Cords must be properly sealed to prevent moisture and gases
from entering the control panel.
(6) When check valve is installed, drill a 3/16" diameter hole in the
discharge pipe below the check valve even with the top of the
pump. NOTE: The hole must be below the basin cover and cleaned
periodically. Also a vent hole is drilled in the pump housing. Be
sure that this hole is cleared during any servicing.
(7) Vent gases and odors to the atmosphere through vent pipe per
Local and State codes.

5
© Copyright 2023 Zoeller®Co. All rights reserved.
Installation and checking of electrical circuits and hardware should be performed by a qualied licensed electrician.
“Risk of electrical shock” Do not remove power supply cord and strain relief or connect conduit directly to the pump.
CAUTION
Power cords, sensor cords, and oat cords all must be sealed to prevent gases from the basin entering the control panel.
INSTRUCTIONS FOR CHECKING ROTATION OF THREE PHASE UNITS
It is very important that these units be connected for proper rotation. Since no rotating parts are visible without removing the pump from the
pit, the rotation on 3 phase units should be checked before installation into the pit as follows:
After the proper electrical connections are made, momentarily energize the pump observing the direction of kick back due to starting torque. The
rotation is correct if the kick back is in the opposite direction of the rotation arrow. If the rotation is not correct, disconnect power and switch
any two power leads. Turn power back on and retest for proper rotation.
SENSOR CABLE
The sensor cable is the smaller cable, which contains 5 wires. The red and orange wires connect to the thermal cut-out circuit and the black and
white wires connect to the seal leak probes. The green wire is a ground connection. All 5 wires must terminate in the control panel.
The following should be noted:
(1) The thermal sensors are normally closed and mounted adjacent to the motor windings. If internal temperatures exceed a maximum limit,
the pump will deactivate when the red and orange wires are connected in series to the control coil of the motor starter circuit. The pump is
able to restart once the motor cools down. Continued deactivation of this circuit requires the attention from maintenance personnel.
(2) The black and white seal leak wires are connected to a 330K ohm moisture detection circuit. An indicator light will activate whenever water
is present in the shaft seal cavity or cord cap assembly. Whenever the seal leak light is activated, indicating the entry of moisture into the
pump, it should be removed and serviced in order to avoid damage to the motor. Moisture sensor circuit can be checked for continuity
(complete circuit) with a (Volt-OHM-Meter). Set the VOM to read resistance and connect the VOM leads to the sensor cord black and
white wires. The VOM should read approximately 330k Ohms. Resistance readings signicantly lower indicates an entry of moisture
into the pump. If VOM reading is open then a problem exists with moisture detection circuit.
(3) The green wire shall be connected to a ground lug in the panel. Check resistance between the green ground conductor of the pump power
cord and the sensor cord black and white wires. This resistance reading should indicate an open circuit. If VOM reading returns a reading
other than open, then a problem exists with the sensor circuit wiring or cordage. If resistance readings show a problem with either test,
then pump should be repaired by a Zoeller Authorized Service Station.
CONTROL PANELS
These pumps are nonautomatic and they require a control panel. A motor starter circuit, control circuit, and high-water alarm circuit within the
panel are standard features. Enclosures rated for outdoor use and alternating relays are often required. Variable level oat switches are the
most common level sensing device. The following should be noted.
(1) Single phase units require externally mounted capacitors and starting relays. Your control panel should have provisions for mounting
these starting components.
(2) The seal failure sensor and thermal sensor protection require that interfacing terminals and functions be incorporated into the panel.
(3) All pumps require overload protection in panel. 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.
(4) Lightning arrestors, condensation heaters and elapsed-time meters are optional features that provide added protection.
PUMP WIRING INSTRUCTIONS
SEAL FAILURE
BLACK & WHITE
LEAD
GROUND
POWER
CORD
LEAD
SENSOR CORD
GREEN GROUND
BLACK
GREEN
RED
WHITE
SENSOR
LEADS
TEMPERATURE
RED & ORANGE
SENSOR
LEADS
POWER AND SENSOR CORD, LEAD IDENTIFICATION
ZEPA0039E
“71 SERIES GRINDER” FOUR CONDUCTOR AWG. POWER CORD SIZE
MODEL HP 230/1 PH 200/3 PH 230/3 PH 460/3 PH 575/3
PH
7110 3 8 AWG. 12 AWG. 12 AWG. 12 AWG. 12 AWG.
7111 5 8 AWG. 8 AWG. 12 AWG. 12 AWG. 12 AWG.
7112 7.5 N/A 8 AWG. 8 AWG. 12 AWG. 12 AWG.
APPROXIMATE CORD DIAMETER PER GAUGE
12/4 AWG. .68"
8/4 AWG. .96"
NOTE: SENSOR CORD 18/5 AWG. APPROXIMATELY .48" DIAMETER.

6
© Copyright 2023 Zoeller®Co. All rights reserved.
THREE PHASE INSTALLATION
Three phase pumps are nonautomatic. To operate
automatically, a control panel is required. Follow the
instructions provided with the panel to wire the system.
Beforeinstalling apump, checkthe pumprotation toinsure
that wiring has been connected properly to power source,
andthatthe greenleadofpowercord (Seewiringdiagram),
is connected to a valid ground, Momentarily energize the
pump, observing the directions of kick back due to starting
torque. Rotation is correct if kick back is in the opposite
direction of rotation arrow on the pump casing. If rotation
is not correct, switching of any two power leads other than
ground, should provide the proper rotation.
Refer to wiring diagram supplied with specic electrical
control panel for correct electrical cable termination
locations.
NOTE 1: Sensor cable includes 5 leads; 2 leads for thermal sensor , 2
leads for moisture sensor, and a green ground lead. Sensor wire colors
are as shown.
(N/C)
SENSOR
330K OHMS RESISTANCE
SEAL FAILURE PROBES
PANEL.
INDUCTION CIRCUIT IN THE CONTROL
LEADS MUST BE CONNECTED TO
SEAL FAILURE MOISTURE SENSOR
STARTER COIL
CONNECTED IN SERIES WITH
RECOMMENDED THERMAL SENSOR
THERMAL
T3
T2
T1
L3
L2
L1
POWER CABLE
3 PHASE MOTOR
3Ø VAC
SENSOR CABLE
BLACK
WHITE
ORANGE
RED
GREEN
TYPICAL 3-PHASE WIRING DIAGRAM
Refer to Sensor Cable and Control Panel sections on page 5.
ZEPA0038E
SINGLE PHASE INSTALLATION (7110 & 7111 ONLY)
All single phase models require start capacitor, run capacitor and relay in the circuit to start and operate properly. These components can be purchased separately
or prewired in a Zoeller control panel. For components purchased separately use the diagram for installation and hookup.
Single phase models are nonautomatic. To operate automatically a control panel must be added to the power circuit. Follow the instructions provided with the panel.
WIRING DIAGRAM COMPONENT LAYOUT
ZEPA0538 ZEPA0537C
21
5
WHITE
PUMP
START
MAIN
BLACK
L2
WHITE
BLACK
RUN CAPACITOR
RED
START CAPACITOR
L1
T2T1
3
2
1
GREEN
230 VAC 1ø
(SEE CHART) (SEE CHART)
7110/7111
MODELS
270-324UF 250V
START CAP. RUN CAP.
50UF 370V
R
RELAY
START
5
21
WHITE
RED
PUMP
MAIN
START
L1 L2
BLACK WHITE
230 VAC 1Ø
FROM CONTACTOR
START
BLACK
START
RELAY
CAPACITOR
RUN CAPACITOR
1 2 3
GREEN

7
© Copyright 2023 Zoeller®Co. All rights reserved.
OPERATION
GENERAL
Zoellerpumpsarelubricated and tested atthefactorypriortoshipment and require
minimum pre-start-up maintenance.
Maximum liquid temperature of a continuous operating pump liquid for this model
pump must not exceed 104 °F (40 °C). For an extended service life, pumps should
be totally submerged on long pumping cycles.
These units are not designed to handle liquids other than sewage. If pump is used
in water contaminated with heavy, viscous, or abrasive materials, the warranty
will be voided.
NAME PLATE DATA
The nameplate, located on the top of pump, indicates specic information about the
construction of the pump. The model number, date code, and serial number should
be recorded on the front page in the “Owner’s Information” section of this manual.
SHORT TERM STORAGE
If pump is to be stored, the following is advised:
• Storepumpinsidewheneverpossibleorcoverwithsometypeofprotectivecovering.
• Tape or seal in plastic bag the terminal ends of wire leads.
• Pump is to be stored in an upright position. Seal leaks that occur in storage to
a pump laying on its side will not be repaired under warranty.
• The impeller should be rotated every three months in order to keep the seals
lubricated and not develop a permanent set.
If panel is to be stored, the following is advised:
• Store the panel inside whenever possible and leave in the shipping carton.
• All openings shall be sealed.
• Store in an upright position.
• Do not stack anything on top of panel.
START-UP PROCEDURE
Before placing the equipment into operation the following should be checked:
• Correct pump rotation (3 Phase units only).
• Clean pit.
• Panel dry, securely installed and properly sealed.
• Floats positioned properly.
• Discharge valves open.
• 3/16” vent hole drilled in pipe between check valve and pump.
Once the above has been veried proceed with the following checks:
• Pump power cables properly connected to panel.
• Float cables properly connected to panel.
• Conduit connections to panel are properly sealed.
• Thermal overload adjustments made in the panel.
• Afterinstallingthepumpintothecontainmentarea,withadequate submergence,
open the discharge valve fully. Start the unit using manual controls. If ow is
appreciablylessthanratedperformance,pumpmaybeairlocked.Toexpeltrapped
air, jog the unit several times, using the manual controls.
• Have a qualied technician take voltage and current measurements with the
pump running. Record these readings in the space provided in the “Owner’s
Information” section on page 1 of this manual for future reference.
After the preoperational functional test has been completed, system is ready for
operation. Zoeller requires completing a Start-up Report (ZM1074) whenever a
system is started for the rst time or after a system has had a signicant change
take place (i.e. pump replacement, overhaul, etc.). A copy of the Start-up Report
should remain with the system for future reference.
ADJUSTMENT PROCEDURE
Pumps: No adjustments are required other than assuring correct rotation.
Panels: The thermal overloads in the panel must be set to the F.L.A. rating on
the pump nameplate (or refer to pump data sheet).
Floats: Refer to the system drawing for desired location of each oat function.
Valves: Shutoff valves should be placed in the fully open position. Systems
should not be operated for extended periods of time with the discharge
valves partially closed due to damaging the valve.
SHUTDOWN PROCEDURES
If a system is shutdown for more than six months, the following is recommended:
Pumps: If pit is to remain dry, then the pump can remain in the pit. With the
pump in the pit, it should be operated for ve minutes once every three
months. If the pit is to remain wet, the pump should be removed and
stored as noted above.
Panels: The panel should have all openings sealed to prevent moisture and dust
from entering the enclosure. Prior to restarting system, the panel should
be inspected for presence of moisture and any loose connections.
Valves: Consult the valve/actuator supplier for information concerning these
systems components.
MAINTENANCE
• If the panel has an elapsed-time meter, check operating times. Uneven
times indicate a defective unit, oat switch or control on a duplex system.
• Inspect the panel for any presence of moisture in enclosure, loose
connections, and general component condition. Check out location and
condition of oat switches.
Every year:
• In addition to the monthly checks, the basin should be inspected and cleaned.
Any defective components should be replaced. Inspect and remove any sand,
debris, or mud present in the pump basin assembly.
Every two years:
Check insulating oil in motor and seal chambers. Inspect oil for contaminations
as follows:
• Clear oil, no burnt odor - Oil, motor and seals are in satisfactory condition.
• Dark oil, burnt odor - Pump motor has overheated. Check the motor winding
resistance to ground. Ohm readings of 1 megaohm or higher is required. If
lower readings are present, return the unit to an Zoeller Authorized Service
Station for service.
• Milky, emulsied oil - Seals have failed. Unit must be returned to an authorized
service facility for service.
• Dispose of the motor insulating oil properly if replacement is required.
• Inspect power cables for damage or wear. Replace immediately if damage
or wear is detected.
• Inspectimpellerfordamageor wear.Replaceas requiredbya ZoellerAuthorized
Service Station.
DOUBLE SEAL PUMPS
• Double seal pumps offer extra protection from damage caused by seal failure.
• Oil in a motor housing and lower seal cavity must be checked when pump is
serviced. If oil from the motor housing contains water or other contamination,
both seals should be replaced during maintenance. Always replace with
new factory recommended oil and service parts. All repairs must be made by
Zoeller Authorized Service Stations.
RepairandserviceshouldbeperformedbyZoellerPumpCompany
Authorized Service Station only.
SAFETY PROCEDURES
For your protection, always disconnect pump and panel from
its power source before handling.
Never enter the basin until it has been properly vented and
tested. Any person entering a basin should be wearing a harness with safety rope
extending to the surface so that they can be pulled out in case of asphyxiation.
Sewage water gives off methane and hydrogen sulde gases, both of which can
be highly poisonous.
Installation and checking of electrical circuits and hardware should be performed
by a qualied electrician.
Pump is never to be lifted by power cord.
Unit must be ushed and disinfected, inside and out, prior to
servicing.
GENERAL SYSTEM INSPECTION
Before the system is placed into operation, a system Start-up Report should be
completed by a qualied technician.
Wiring and grounding must be in accordance with the national
electrical code and all applicable local codes and ordinances.
LUBRICATION PROCEDURES
No lubrication is required.
If pumps are to be stored for more than six months, refer to short term storage
procedure in the Operation section.
PREVENTIVE MAINTENANCE
Preventive maintenance will ensure a longer service life from the product. The
following is a suggested maintenance schedule.
Every month:
• Check for proper and unobstructed oat operation.
• Listen for proper check valve operation.
• Check and record the amp draw through the three power leads.

© Copyright 2023 Zoeller®Co. All rights reserved.
ELECTRICAL PRECAUTIONS Before servicing a pump, always shut off the main power breaker to the panel and then disconnect the
pump - making sure you are wearing insulated protective sole shoes and are not standing in water. Under ooded conditions, contact your local electric
company or a qualied licensed electrician for disconnecting electrical service prior to pump removal.
Submersible pumps contain oils which become pressurized and hot under operating conditions - allow 2-1/2 hours after disconnecting
before attempting service.
CONDITION
A. Pump will not start or run.
COMMON CAUSES
B. Motor overheats and trips overload or blows fuse. - Incorrect Voltage
- Unbalanced power source
- Incorrect motor rotation
- Negative or low head
- Excessive water temperature
- Impeller, cutter, or seal mechanically bound
- Defective capacitor or relay
- Motor shorted
- Lost a leg in a Three Phase unit
C. Pumps starts and stops too often. - Check valve stuck open
- Level controls out of adjustment
- Temperature sensor tripping
- Thermal overload switch out of
adjustment or defective
- Pit too small
D. Pump will not shut off. - Debris clogging cutter plate
- Debris under oat switch
- Float travel obstructed
- Defective or damaged oat switch
- Magnetic starter contacts shorted
- Air lock - check vent hole
E. Pump operates but delivers little or no water. - Check for plugged cutter, pump housing, pipe or sticking
check valve
- Vent hole clogged or not drilled
- Discharge head exceeds pumps capacity
- Low or incorrect voltage
- Incorrect motor rotation
- Defective capacitor
F. Drop in head and/or capacity after a period or use. - Increase Pipe Friction
- Clogged line or check valve
- Abrasive material & chemical,
deteriorated impeller and pump housing
If the above check list does not uncover the problem, consult the factory. Do not attempt to service or otherwise disassemble pump.
SERVICE CHECKLIST & TROUBLE SHOOTING
Steps Check Voltage At If No Voltage If Voltage
No. 1 Line terminals in pump's Check Disconnect switch, line Proceed to No. 2
control panel fuse, and/or circuit breakers
L1- L2- L3(3 Phase) in power supply circuit.
No. 2 Pump motor terminals in Check for control circuit Check starting relay
pump’s control panel voltage. Check out magnetic and capacitor (1
T1- T2- T3starter contacts, thermal phase units). Check
overloads, and oat switches pump for ground,
and binding impeller