Zoeller Pump Company 912/915 Preassembled Sewage Systems Installation Guide

: August 17, 2024
: Zoeller Pump Company

Table of Contents

912/915 Preassembled Sewage Systems
Specifications
Installation Instructions
Warnings:
Cautions:
Usage Guidelines:
- FAQ
Q: Can this pump be used for potable water?
Q: Is the pump suitable for swimming pools?
Q: What should I do if the pump is damaged during

912/915 Preassembled Sewage Systems

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Specifications

Model Number: FM3291 0124
Product Type: 912/915 Preassembled Sewage Systems
Manufacturer: Zoeller Pump Company
Website: zoellerpumps.com

Installation Instructions

Inspect Materials: Check for any damage during
shipment. Contact dealer if damaged. Do not remove test plugs.
Read Literature: Familiarize yourself with
installation details. Keep materials for future reference.

Warnings:

Electrical Safety: Ensure proper grounding,
use ground fault interrupter, and avoid extension cords.
Circuit Capacity: Verify fuses or breakers,
use a separate branch circuit.
Ground Testing: Check outlets for correct
wiring using a circuit analyzer.
Disconnect Before Handling: Always disconnect
power before servicing. Wear insulated shoes and avoid water
contact.

Cautions:

Pump Maintenance: Wait 2-1/2 hours after
disconnecting for servicing due to pressurized oil.
Water Usage: Pump not for potable water or
swimming pools/marine areas.

Usage Guidelines:

This sewage system is designed for human waste and toilet paper
only. Avoid flushing feminine products, condoms, baby wipes,
etc.

FAQ

Q: Can this pump be used for potable water?

A: No, this pump is not intended for potable water due to
potential oil contamination.

Q: Is the pump suitable for swimming pools?

A: No, the pump has not been approved for use in swimming pools
or marine areas.

Q: What should I do if the pump is damaged during

shipment?

A: Contact your dealer immediately and do not use the pump until
inspected by a professional.

“`

Notice to installer: instructions must remain with installation.
Trusted. Tested. Tough.® DATE INSTALLED:

FM3291 0124
Supersedes 1023

MODEL NUMBER:

MAIL TO: P.O. BOX 16347 · Louisville, KY 40256-0347 SHIP TO: 3649 Cane Run Road · Louisville, KY 40211-1961
Tel: 502-778-2731 · 1 (800) 928-PUMP

Visit our website: zoellerpumps.com

Product information presented here reflects conditions at time of publication. Consult factory regarding discrepancies or inconsistencies.

Register your Zoeller Pump Company Product on our website: http://reg.zoellerpumps.com/

INSTALLATION INSTRUCTIONS
912/915 Preassembled Sewage Systems

P/N 157026

1. Inspect all materials. Occasionally, products are damaged during shipment. If the unit is damaged, contact your dealer before using. DO NOT remove the test plugs from the pump.
2. Carefully read the literature provided to familiarize yourself with specific details regarding installation and use. These materials should be retained for future reference.

SEE BELOW FOR LIST OF WARNINGS

CAUTION SEE BELOW FOR LIST OF CAUTIONS

1. To reduce the risk of electrical shock, a properly grounded receptacle or control box must be installed in accordance with the governing codes. Never remove ground pin from plug.
2. Make certain that the ground fault interrupter protected receptacle or 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 sufficient voltage to the pump motor, and they could present a safety hazard if the insulation were to become damaged or the connection end were to fall into a damp or wet area.
3. Make sure the pump’s electrical supply circuit is equipped with fuses or circuit breakers of proper capacity. A separate branch circuit is recommended, sized according to the local electrical codes for the current shown on the pump name plate.
4. Testing for ground. As a safety measure, each electrical outlet should be checked for ground using a circuit analyzer which will indicate if the power, neutral and ground wires are correctly connected to your outlet. If they are not, call a qualified, licensed electrician.
5. FOR YOUR PROTECTION, ALWAYS DISCONNECT PUMP FROM ITS POWER SOURCE BEFORE HANDLING. If pump is wired direct, de-energize the circuit at the control box. Wear insulated protective shoes and do not stand in water. Pumps equipped with a 3-prong ground plug are designed to help protect against electrical shock. DO NOT, UNDER ANY CIRCUMSTANCES, REMOVE THE GROUND PIN.
6. Installation and servicing of the pump’s electrical circuits and hardware should only be performed by a qualified, licensed electrician.
7. Risk of electrical shock. Do not remove power supply cord and strain relief or connect conduit directly to the pump.
8. Pump contains oil which becomes pressurized and hot when operating. Allow 2-1/2 hours after disconnecting before attempting service.
9. Pump is not intended for potable water due to possible contamination by oil contained in the pump.
10. Risk of electric shock. These pumps have not been investigated for use in swimming pools and marine areas.
11. Prop65 Warning for California residents: : Cancer and Reproductive Harm-
www.P65Warning.ca.gov.

1. This unit is not designed to handle any material other than human waste and toilet paper. The list of items that should not be used with this system includes, but is not limited to, feminine sanitary products, condoms, cotton balls and swabs, baby wipes, paper towels, etc.
2. Check to be sure your power source is capable of handling the voltage requirements of the motor, as indicated on the pump name plate.
3. The installation of variable level float switches is the responsibility of the installing party, and care should be taken that the tethered float switch will not hang up on the pump apparatus or pit peculiarities and is secured so that the pump will shut off. It is recommended to use rigid pipe and fittings and the pit be 18″ or larger in diameter.
4. Vent hole. It is necessary that all submersible sump, effluent, and sewage pumps capable of handling various sizes of solid waste be of the bottom intake design to reduce clogging and seal failures. If a check valve is incorporated in the installation, a 3/16″ vent hole must be drilled in the discharge pipe below the check valve and pit cover to purge the unit of trapped air. Vent hole should be checked periodically for clogging. The vent hole on a High Head application may cause too much turbulence. If you choose not to drill a vent hole, be sure the pump case and impeller is covered with liquid before connecting the pipe to the check valve. NOTE: THE HOLE MUST BE BELOW THE BASIN COVER AND CLEANED PERIODICALLY. Water stream will be visible when pump is operating.
5. Pump should be checked frequently for debris and/or buildup which may interfere with the float “on” or “off” position. Repair and service should be performed by Zoeller Pump Company Authorized Service and Warranty Center.
6. Maximum operating temperature for standard model pumps must not exceed 130 °F.
7. Do not operate a pump in an application where the Total Dynamic Head is less than the minimum Total Dynamic Head listed on the Pump Performance Curves.
8. For health reasons, do not unplug, turn off, or disable pump and use pump tank system as a way to fill up a sink or laundry tray, etc.
9. Pumps must be installed in accordance with the National Electrical Code and all applicable local codes and ordinances. Pumps are not to be installed in locations classified as hazardous in accordance with National Electric Code, ANSI, NFPA 70.
NOTE: Pumps with the “UL” mark and pumps with the “US” mark are tested to UL standard UL778. CSA certified pumps are certified to CSA standard C22.2 No. 108.

REFER TO WARRANTY ON PAGE 2.

LIMITED WARRANTY
Manufacturer warrants, to the purchaser and subsequent owner during paragraph above is in lieu of all other warranties expressed or implied; and we the warranty period, every new product to be free from defects in material do not authorize any representative or other person to assume for us any other and workmanship under normal use and service, when properly used and liability in connection with our products. Contact Manufacturer at, 3649 Cane maintained, for a period of 3 years from the date of purchase. Proof of purchase Run Road, Louisville, Kentucky 40211, Attention: Customer Service Department is required. Parts that fail within the warranty period, that inspections determine to obtain any needed repair or replacement of part(s) or additional information to be defective in material or workmanship, will be repaired, replaced or pertaining to our warranty. remanufactured at Manufacturer’s option, provided however, that by so doing we
will not be obligated to replace an entire assembly, the entire mechanism or the MANUFACTURER EXPRESSLY DISCLAIMS LIABILITY FOR SPECIAL, complete unit. No allowance will be made for shipping charges, damages, labor CONSEQUENTIAL OR INCIDENTAL DAMAGES OR BREACH OF EXPRESSED or other charges that may occur due to product failure, repair or replacement. OR IMPLIED WARRANTY; AND ANY IMPLIED WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE AND OF MERCHANTABILITY SHALL BE LIMITED TO This warranty does not apply to and there shall be no warranty for any material THE DURATION OF THE EXPRESSED WARRANTY. or product that has been disassembled without prior approval of Manufacturer,
subjected to misuse, misapplication, neglect, alteration, accident or act of Some states do not allow limitations on the duration of an implied warranty, nature; that has not been installed, operated or maintained in accordance so the above limitation may not apply to you. Some states do not allow the with Manufacturer’s installation instructions; that has been exposed to outside exclusion or limitation of incidental or consequential damages, so the above substances including but not limited to the following: sand, gravel, cement, limitation or exclusion may not apply to you. This warranty gives you specific mud, tar, hydrocarbons, hydrocarbon derivatives (oil, gasoline, solvents, legal rights and you may also have other rights which vary from state to state. etc.), or other abrasive or corrosive substances, wash towels or feminine
sanitary products, etc. in all pumping applications. The warranty set out in the

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.

DO’S & DON’T’S FOR INSTALLING UNIT

1. DO read all installation material with the unit.

9. DO NOT use an extension cord.

2. DO inspect unit for any visible damage caused by shipping. Contact dealer if unit appears to be damaged.
3. DO remove all debris from the basin. Be sure that the pump will have a hard, level surface beneath it. DO NOT install on sand, gravel or dirt.
4. DO be sure that the area is large enough to allow proper clearance for the level control switch(es) to operate properly.
5. DO Always Disconnect Pump From Power Source Before Handling. 6. DO always connect to a separately protected and properly grounded circuit. 7. DO NOT ever cut, splice, or damage power cord (Only splice in a watertight
junction box).
8. DO NOT carry or lift pump by its power cord.

10. DO install a check valve and a union in the discharge line. 11. DO NOT use a discharge pipe smaller than the pump discharge. 12. DO NOT utilize this unit for pumping gasoline or other hazardous liquids. 13. DO test pump immediately after installation to be sure the system is working
properly. 14. DO review all applicable governing codes and verify that the installation
conforms to each of them. 15. DO consult manufacturer for clarifications or questions. 16. DO consider a two-pump system with an alarm where an installation may become
overloaded or primary pump failure would result in property damages. 17. DO inspect and test system for proper operations at least every 3 months.

RECOMMENDED INSTALLATION FOR ALL APPLICATIONS

1. Electrical wiring and protection must be in accordance with governing electrical codes.
2. All installations require a basin cover to prevent debris from falling into the basin and to prevent injury.
3. Install proper Zoeller unicheck (combination union and check valve), preferably just above the basin to allow easy removal of the pump for cleaning or repair. If high head or below cover installation is required, use 30-0164 on 1-1/2″ pipe, 30-0152 on 2″ pipe and 30-0160 on 3″ pipe.
4. When a Unicheck is installed, drill a 3/16″ diameter hole in the discharge pipe even with the top of the pump. NOTE: THE HOLE MUST ALSO BE BELOW THE BASIN COVER AND CLEANED PERIODICALLY. (High Head unit see #4 under “Caution” on front page). Water stream will be visible from this hole when pump is operating.
5. Securely tape or clamp power cord to discharge pipe, clear of the float mechanism(s).
6. Use a discharge pipe equivalent in diameter to the pump’s discharge.

7. Basin must be in accordance with governing codes and specifications. 8. Pump must be level and float mechanism(s) clear of sides of basin
before starting pump. 9. Basin must be clean and free of debris after installation. 10. Gate valve, shut-off valve, or ball valve to be supplied by installer and
installed according to any and all codes. 11. Locate float switches as shown in sketches. The best place for the “off”
point is above the motor housing and positioned 180 °F from the inlet. Never put “off” point below discharge on pump 12. Gas-tight seals are required to contain gases and odors. 13. Vent gases and odors to the atmosphere through vent pipe. 14. Optional pump stand (P/N 10-2421) eliminates the need for blocks or bricks under the pump. For use with effluent and dewatering pumps only. 15. Optional watertight control box available, see FM1597 for details. 16. For proper spacing of “On” – “Off” switches refer to local or national standards and guildlines. 17. Optional septic tank risers for easy access to pump, controls and filters.

Preparation

Installation Instructions

Inspect your basin assembly. If the unit has been damaged in shipment or if parts are missing, contact your distributor before installing. Carefully read all literature to familiarize yourself with details regarding installation and use. Retain materials for future reference. All installations must comply with all applicable electrical and plumbing codes, including but not limited to the National Electrical Code, local, regional and/or state plumbing codes, etc.
The clear construction cover can be reattached after reading the appropriate materials. It will ensure the cover, cordage, etc. remains clean during installation.

Excavation

Excavate a hole for the basin in a very low traffic area in proximity to a proper electrical outlet. The hole should be at least 8″ larger in diameter than the basin in order to leave 4″ of backfill all the way around the perimeter. A minimum of 4″ of compacted subbase is also required. Backfill and subbase should be 1/8″ to 3/4″ pea gravel or 1/8″ to 1/2″ crushed stone.

VENT PIPE (OFFSET FOR ILLUSTRATION PURPOSES)
NO HUB STYLE CONNECTOR 4″ INLET PIPE (INSTALLED BY CONTRACTOR)
MINIMUM 4″ COMPACTED SUB-BASE

DISCHARGE PIPE
PUMP POWER CORD ROTOMOLDED BASIN AS PER ENGINEER’S SPECIFICATION
FINISHED FLOOR
MINIMUM 4″ BACKFILL MATERIAL SEE REQUIREMENTS BELOW
SK3311

1″ 3/4″ 1/2″ 1/4″

PEA GRAVEL

CRUSHED ROCK

BACKFILL MATERIAL REQUIREMENTS

Basin Placement
Ensure compacted subbase is free of any sharp rocks that could come into direct contact with the basin. Place basin into pit and verify that it is level. It is recommended that the top of the basin is level with the surrounding finished floor. Once the desired positioning has been achieved, partially backfill basin to help hold in place. Ensure enough room is left below the inlet to make the inlet connection. Connect the 4″ inlet pipe using a no-hub style connector and finish backfilling around the basin with the specified media. Care should be taken not to damage components or leave voids when backfilling. Finish grade of floor should be poured in place around the top 6″ of the basin assembly.

Discharge/Vent

The 2″ threaded discharge and vent ports are located and labeled on top of the cover. Installations containing sewage pumps: 211, 212, 264, or 266 models must not use a discharge smaller than 2″. Installations containing grinder pumps: 803, 805, or 807 must not use a discharge smaller than 1.25″. All venting needs to be installed in accordance with any/all local and national plumbing codes.

Simplex:

INLET

Using an adapter, connect discharge pipe to the “Discharge” 2″ threaded port and connect vent pipe to the “Discharge/Vent” 2″ threaded port.

OPTIONAL 4″ INLET ID TAG

DISCHARGE

Duplex:

Using an adapter, connect discharge pipes to both 2″ threaded

ports on top of the cover. For the vent, use a 3″ hole saw to drill

a hole located at the pilot hole indention on the cover. Install the

included pipe seal and use 2″ pipe for the vent.

VENT/DISCHARGE

VENT FOR DUPLEX SYSTEMS

SAFETY SCREW

Inspection Port

INSPECTION PORT
SK3310

912/915 24×24 systems are equipped with an inspection port in the lid to allow for the convenient observation and replacement of pump/alarm floats as needed. For access, remove the safety screw located on top, turn the inspection cap counterclockwise and lift.
Float heights are preset from the factory for optimum performance. During startup, ensure all floats have adequate clearance and are operating appropriately.

Float tree removal (24×24 Systems Only)
The float tree may be easily removed for the inspection and replacement of floats. It is held in place with compression between the lid and basin. To remove the float tree, simply push down on the handle on top to free it from the bottom of the lid. Lift the tree and floats upward through the inspection port. Lift the appropriate cord seals from the top of the cover to relieve any attached cords. To reattach,
ensure cord seals have been fully inserted and lower the float tree back through the inspection port. Reinsert the bottom of the float tree into the premolded ring and push down on the top handle to reattach on the premolded bottom section of the lid. Ensure floats are oriented with adequate clearance for operation.

Electrical Connections

FOR YOUR PROTECTION, ALWAYS DISCONNECT PUMP FROM ITS POWER SOURCE BEFORE HANDLING. Single phase pumps are supplied with a 3-prong grounded plug to help protect you against the possibility of electrical shock. DO NOT, UNDER ANY CIRCUMSTANCES, REMOVE THE GROUND PIN. The 3-prong plug must be inserted into a mating 3-prong grounded receptacle. If the installation does not have such a receptacle, it must be changed to the proper type, wired and grounded in accordance with the National Electrical Code and all applicable local codes and ordinances.

pump.

Risk of electrical shock. Do not remove power supply cord and strain relief or connect conduit directly to the

Installation and checking of electrical circuits and hardware should be performed by a qualified licensed electrician.

24×24 Extension and Riser Installation Instructions

31-3108 8″ Extension for indoor 24×24 system

Identify all the components for the 24 X 24 basin extension (Figure 1).
8″ PIPE EXTENSION ASSEMBLY
Item

Description

Qty

008824 Fitting, Pvc 2″ Coupling/Slip X Slip/Sch 40

1

FLANGE NUTS (8)

010629 Pipe, Pvc 2″ X 8″ Sch 40

1

156345 Nut, 1/4-20″ X 8″ Sch 40

8

157760 Extension, Basin/PSF/24″ for 24 X 24 Basin

1

157756 Seal, Gasket/24 X 24 Basin Extension

1

EXTENSION

157904 Screw, Set/1/4-20 X 1.75″/S.S

8

157761 Float Tree, Asm/PSF/Extension

1

FLOAT TREE EXTENSION

GASKET

SET SCREWS (8)

FIGURE 1

SK3376

1. Remove the construction cover and the lid from the 24 X 24 basin by unfastening the 8 bolts. Carefully set aside for reinstallation later. Remove the float tree assembly and set aside for later reinstallation.
2. Using an 1/8″ allen wrench, thread the set screws into the basinthread inserts. Be sure to bottom out set screws. (Figure 2)
3. Apply a 1/4″ bead of silicone into the gasket groove on top of 24 x 24 basin after set screws are in place (Figure 2)

USING AN 1/8″ ALLEN WRENCH THREAD SET SCREWS INTO BASIN THREAD INSERTS. BE SURE TO BOTTOM OUT SET SCREWS.
APPLY A 1/4″ BEAD OF SILICONE INTO GASKET GROOVE AFTER SET SCREWS ARE IN PLACE.

FIGURE 2
© Copyright 2024 Zoeller Co. All rights reserved.

SK3376

4. Line up gasket bolt holes with set screws and set gasket down into groove. (Figure 3) a. Ensure gasket is hump side down and ribbed side up when placing it on the basin.
5. Apply a 1/4″ bead of silicone on top of gasket. (Figure 3)

LINE UP GASKET BOLT HOLES WITH SET SCREWS AND SET GASKET DOWN INTO GROOVE.
ENSURE GASKET IS HUMP SIDE DOWN WHEN PLACING IT ON THE BASIN
APPLY A 1/4″ BEAD OF SILICONE ON TOP OF GASKET.

6. Line up extension bolt holes with set screws and set extension on top of gasket. Use flange nuts to secure extension onto set screws and gasket. Tighten flange nuts to 25 in/lbs.(Figure 4)

LINE UP EXTENSION BOLT HOLES WITH SET SCREWS AND SET EXTENSION
ON TOP OF GASKET

7. Glue pipe extension to existing discharge pipe. (Figure 5)

8. Secure lid back down by replacing the 8 bolts.

9. Remove the snapped in float holders from the original float tree pipe and replace in the same location from the bottom of the pipe on the new, longer float tree pipe.
10. Install the longer float tree assembly back into basin. (Figure 6)

11. Replace the construction cover (if applicable).
GLUE PIPE EXTENSION TO EXISTING DISCHARGE PIPE.

SK3376
USE FLANGE NUTS TO SECURE EXTENSION ONTO SET SCREWS AND GASKET TIGHTEN NUTS TO 25 INCH/LBS

FIGURE 4

SK3376

SECURE LID

INSTALL FLOAT TREE (IF APPLICABLE)

SK3376

FIGURE 5

FIGURE 6

10-5157 – 18″ Riser for 24×24 basin

SUPPLIED SCREWS RISER LID

CLEAN BOTTOM OF ADAPTER RISER WITH ACETONE BEFORE APPLYING TAR TAPE
PRESS TAR TAPE ONTO BOTTOM OF ADAPTER RISER BEFORE PRESSING ONTO BASIN
CLEAN THIS SURFACE OF BASIN WITH ACETONE BEFORE INSTALLING ADAPTER RISER WITH TAR TAPE

915-0005 & 915-0007 FINAL ASSEMBLY

SK3320

SYSTEM MUST BE ORIENTED WITH DIRECTION LABEL RELATIVE TO THE INLET.

SK2896

915-0005 & 915-0007 PARTS BREAKDOWN

1
MODEL : 915 – A

ITEM DESCRIPTION

8/11

QTY

thru

11/11

1 HARDWARE KIT – STD/10′ (3 M) STACK

1

151846

2

CHECK VALVE – SHIPPED LOOSE FOR FIELD INSTALLATION

1

30-0237

6

3 801 PUMP

1

151692

4 PIGGYBACK FLOAT

1

151847

7

5 PIPE ASSEMBLY

1

151848

2

BASIN COVER AND HARDWARE KIT – STD

151849

6 BASIN COVER AND HARDWARE KIT –

10

10′ (3 M) STACK

1 N/A

BASIN COVER – STD

17-0804

7

1

3

BASIN COVER – 10′ (3 M) STACK

N/A

8 ALARM

1

10-4012

BRACKET – 24″ (61 CM) DEEP BASIN

151760

9

1

4

BRACKET – 30″ (76 CM) DEEP BASIN

150849

10 10′ (3 M) CORD SEAL ASM

1

151891

915 – B
12/11 thru Current
151939
30-0239
151692 151847 151940 151941
151951
17-0828 17-0830 10-4012 151760 150849 151891

SILENCE

POWER

INPUT 1

8

9

5

ALARM HOLE MAY NEED TO BE DRILLED

LARGER TO ACCOMODATE OLD FLOAT DESIGN.

SK2877

SERVICE CHECKLIST

CONDITION

COMMON CAUSES

A. Pump will not start or run.

Check fuse, low voltage, overload open, open or incorrect wiring, open switch, impeller or seal bound mechanically, motor or wiring shorted. Float assembly held down. Switch, damaged or out of adjustment.

B.

Motor overheats and trips overload or blows fuse.

Incorrect voltage, negative head (discharge open lower than normal) impeller or seal bound mechanically, motor shorted.

C.

Pump starts and stops too often.

Float switch tether length too short, check valve stuck open, or none installed in long distance line, overload open, bidding, sump pit too small.

D. Pump will not shut off.

E.

Pump operates but delivers little or no water.

Debris under float assembly, float bound by basin sides or other, switch, damaged or out of adjustment.
Check inlet, strainer housing, discharge pipe, and vent holes for obstructions. Discharge head exceeds pump capacity. Low or incorrect voltage. Incoming water containing air or causing air to enter pumping chamber. Incorrect motor rotation. (3 phase pumps only)

F.

Drop in head and/or capacity after a period of use.

Increased pipe friction, clogged line or check valve. Abrasive material and adverse chemicals could possibly deteriorate impeller and pump housing. Check line. Remove base and inspect.

G. Tank or fittings leak.

Carefully tighten pipe joints (use pipe dope) and screws. Check gasket location, tighten lid evenly. Do not over tighten fittings or screws.

If the above checklist does not uncover the problem, consult the factory. do you attempt to service or otherwise disassemble pump. Service must be performed by Zoeller authorized Service and warranty centers. Go to www.zoellerpump.com to find the authorized service center in your area.

MAIL TO: P.O. BOX 16347 · Louisville, KY 40256-0347 SHIP TO: 3649 Cane Run Road · Louisville, KY 40211-1961
Tel: 502-778-2731 · 1 (800) 928-PUMP

Visit our website: zoellerpumps.com