Introduction
The Zoeller Model 912 is a preassembled sewage ejector package designed for efficient and reliable wastewater management. This system includes all key components required for installation, making it a job-ready solution. It is engineered for burial flush-to-grade, ensuring only the access cover is visible after installation. The package features the Zoeller Model 264 sewage pump, known for its robust performance and ability to handle 2-inch spherical solids, minimizing the risk of clogging.
Safety Information
WARNING: Read all instructions carefully before installation and operation. Failure to follow these instructions can result in serious injury, property damage, or death.
- Always disconnect power before servicing the pump or basin system.
- Ensure all electrical connections are made by a qualified electrician and comply with local codes.
- Do not operate the pump in an explosive atmosphere or pump flammable liquids.
- Wear appropriate personal protective equipment (PPE) during installation and maintenance.
- Ensure proper ventilation when working in confined spaces.
- This system is designed for sewage and wastewater only. Do not use for other applications.
Package Contents
The Zoeller Model 912 sewage ejector package comes preassembled with the following components:
- 18" x 30" Polyethylene Structural Foam (PSF) Basin
- Zoeller Model 264 Sewage Pump (4/10 HP)
- Piggyback Switch on a Float Tree
- 2" PVC Discharge Pipe with predrilled 3/16" weep hole
- Basin Cover with cord seal and predrilled 2" vent hole
- Pre-plumbed 4" Inlet Hub
Setup and Installation
The Model 912 system is designed for fast and easy installation due to its preassembled nature. Follow these guidelines for proper setup:
- Site Preparation: Excavate a pit suitable for the 18" x 30" basin, ensuring it allows for burial flush-to-grade. The access cover should be the only visible part after installation.
- Basin Placement: Carefully lower the preassembled basin into the prepared pit. Ensure it is level and stable. The environmentally friendly packing peanuts inside the basin are water-soluble and will dissolve upon first use.
- Inlet Connection: Connect the main sewage line to the pre-plumbed 4" inlet hub on the basin. Ensure a secure and watertight connection.
- Discharge Connection: Connect the 2" PVC discharge pipe to your plumbing system. The pipe includes a predrilled 3/16" weep hole to prevent airlock; ensure this hole is not obstructed.
- Vent Connection: Connect a 2" vent pipe to the predrilled vent hole on the basin cover. Proper venting is crucial for system operation.
- Electrical Connection: The Model 264 sewage pump comes with a 115V electrical cord. Route the cord through the cord seal on the basin cover. Connect the pump to a dedicated, properly grounded electrical circuit as per local electrical codes. The piggyback switch on the float tree allows for easy inspection and maintenance.
- Final Inspection: Before backfilling, visually inspect all connections for leaks and ensure the float switch operates freely without obstruction from the inlet flow. The float switch is installed 180° from the 4" inlet to prevent interference.
- Backfilling: Once all connections are secure and tested, backfill around the basin, ensuring the access cover remains accessible and flush with the grade.
Image: The Zoeller BN264 Model 912 Sewage Pump and Basin System, showing the preassembled basin with the pump, discharge pipe, and cover components. This image illustrates the compact and integrated design of the system ready for installation.
Operation
The Zoeller Model 912 system operates automatically once properly installed and connected to power. The Model 264 sewage pump features a vortex impeller design, allowing it to pass 2-inch spherical solids without clogging. The piggyback float switch activates the pump when the wastewater level in the basin reaches a predetermined height, and deactivates it once the level drops. The predrilled 3/16" weep hole in the discharge pipe prevents airlock, ensuring consistent pump operation.
Maintenance
Regular maintenance ensures the longevity and efficient operation of your Zoeller sewage pump system.
- Periodic Inspection: Periodically check the basin for excessive buildup of solids or debris. Ensure the float switch moves freely and is not obstructed.
- Weep Hole Check: Verify that the 3/16" weep hole in the discharge pipe remains clear to prevent airlock.
- Pump Cleaning: If the pump's performance degrades, it may require cleaning. Disconnect power, remove the pump, and clear any debris from the impeller and volute.
- Electrical Connections: Annually inspect electrical connections for corrosion or damage.
- Basin Cover Seal: Ensure the basin cover seal is intact to prevent odors and maintain system integrity.
Troubleshooting
If your Zoeller sewage pump system is not operating correctly, consider the following common issues:
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not run | No power, tripped breaker, faulty float switch, motor issue | Check power supply and breaker. Inspect float switch for obstruction or damage. Consult a qualified technician for motor issues. |
| Pump runs continuously | Float switch stuck in ON position, faulty float switch | Check float switch for obstruction. Replace faulty float switch. |
| Pump runs but no water is discharged | Clogged impeller, airlock, discharge pipe obstruction | Disconnect power and clear impeller. Check weep hole for obstruction. Inspect discharge pipe for blockages. |
| Pump cycles too frequently | Inflow too high, basin too small, float switch setting incorrect | Ensure proper basin sizing for application. Adjust float switch settings if possible. |
Specifications
- Brand: Zoeller
- Model Number: Z9120005
- Product Style: Model 912
- Pump Model: Zoeller Model 264
- Horsepower (Pump): 4/10 HP
- Solids Handling: 2 inches spherical solids
- Basin Dimensions: 18" Diameter x 30" Height
- Basin Material: Polyethylene Structural Foam (PSF)
- Discharge Pipe: 2" PVC with 3/16" weep hole
- Vent Hole: 2" predrilled
- Inlet Hub: 4" pre-plumbed
- Power Source: AC/DC (115V for pump)
- Item Weight: 56 Pounds
- Maximum Flow Rate: 128 Gallons Per Minute
- Country Of Origin: United States
Warranty and Support
For specific warranty information regarding your Zoeller BN264 Model 912 Sewage Pump and Basin System, please refer to the documentation included with your purchase or visit the official Zoeller website. For technical support, parts, or service inquiries, please contact Zoeller customer service directly. Always provide your model number (Z9120005) when seeking assistance.