Sololift2 C-3
Installation and Operating Instructions
This document provides installation and operating instructions for the Sololift2 C-3 lifting station.
1. Symbols Used in This Document
- [Warning]: Indicates a hazardous situation which, if not avoided, will result in personal injury.
- [Warning - Hot Surface]: Indicates that the surface of the product may be hot and can cause burns or personal injury.
- [Caution]: Indicates a hazardous situation which, if not avoided, may result in malfunction or damage to the equipment.
- [Note]: Provides helpful tips or instructions to make the job easier and ensure safe operation.
2. General Description
The Sololift2 C-3 is a small, compact, automatic lifting station designed for pumping grey wastewater from locations where it cannot be directly discharged to the sewer via natural downward slope. It is suitable for pumping grey wastewater up to 90 °C.
[Caution]: If you are away for an extended period (e.g., holidays), it is recommended to turn off the water supply to the units served by the lifting station.
3. Applications
The product is suitable for pumping grey wastewater from appliances such as a washing machine, dishwasher, kitchen sink, bathtub, or shower.
[Note]: The product must be securely fastened to the floor to prevent uplift and turning.
4. Pumped Liquids
The unit is designed for grey wastewater up to 90 °C and ordinary cleaning liquids. The pH value of the pumped liquid should be between 4-10.
[Caution]: Do not pump harsh chemicals or solvents. Refer to the quick guide for details.
5. Installation
[Caution]: Never pull or lift the product by its supply cable.
It is strongly recommended to install an LC A2 alarm device (accessory) if a washing machine, dishwasher, bathtub, or shower is connected to the lifting station. The LC A2 will provide an acoustic alarm and switch off connected appliances if the water level in the tank becomes too high.
[Caution]: For applications involving foaming wastewater, it is recommended to change the level switch. Use the pressure switch with product number 98144467.
Ensure the product is accessible for maintenance and repair. The installation location must be frost-free to prevent the pumped liquid from freezing. All external pipework should be adequately insulated.
[Note]: The discharge pipe should be made of rigid material, such as copper or rigid PVC with solvent-welded joints. To prevent vibration transmission to buildings, ensure pipework is securely fixed and fittings do not contact building parts.
6. Electrical Connection
Verify that the product's supply voltage and frequency match the available site conditions. Electrical connections must comply with local regulations.
[Warning]: The product must be earthed. The installation must include an earth leakage circuit breaker for protection against earth fault currents, especially when using a Schuko plug or similar. Connect the product to a mains switch with a minimum contact gap of 3 mm in all poles.
The unit features a thermal switch that cuts out the motor in case of overtemperature and automatically restarts when cooled.
7. Service
[Warning]: Service must only be performed by trained service personnel. If the supply cable is damaged, it must be replaced by the manufacturer, their service partner, or a similarly qualified person.
Always use original Grundfos spare parts for safe and reliable operation. For service kits, visit www.grundfos.com > WebCAPS > Service.
[Note]: The product must be thoroughly cleaned before being returned for service to avoid voiding the warranty.
7.1 Service Documentation
Service documentation is available at www.grundfos.com > WebCAPS > Service. For any questions, contact the nearest Grundfos company or service workshop.
7.2 Maintenance
The lifting station requires minimal maintenance. It is recommended to check its operation and pipe connections annually.
[Note]: If connected to a washing machine or kitchen sink, check the float switch unit every six months for fibres and grease/fat.
Change the carbon filter annually. Refer to section 7.3 for service instructions.
7.3 Service Instructions
The product is designed for easy servicing in case of malfunction or pump blockage. Diagrams referenced in the following sections are found in the appendix.
[Warning]: The product may contain hot water. Surfaces may be hot and cause burns or personal injury.
[Warning]: Before any service work, disconnect the power supply (remove fuse, pull plug, or switch off at the mains). Ensure the power cannot be accidentally switched on. All rotating parts must be stationary. Service must only be performed by trained personnel.
Impeller Stuck
- Disconnect the power supply.
- Unscrew the cover.
- Turn the motor shaft left and right with a screwdriver in the shaft end slot to free the impeller from debris.
- Refit the cover and switch on the power supply to check if the impeller rotates freely.
Operation by Means of a Power Drill
- If the product cannot be operated electrically, disconnect the power supply and empty the tank using a power drill.
Foreign Body in Tank
- If the water level is above the motor flange, disconnect the power supply and drain the tank via the drain hose.
- Unscrew the cover.
- Remove the four screws of the motor flange.
- Lift the motor flange slightly to reduce O-ring compression. Insert a screwdriver into the notch under the supply cable and press down.
- Lift out the complete motor-pump unit by its handles.
- [Note]: Lift the unit vertically before tilting.
- Check and clean the impeller, the float switch protecting tube, and the tank.
- [Note]: Verify the float switch operates correctly before refitting the cover.
Float Switch Pipe Blocked
- [Note]: The float switch unit can be removed separately.
- If the water level is above the motor flange, disconnect the power supply and drain the tank via the drain hose.
- Unscrew the cover.
- Turn the bayonet coupling 10° clockwise.
- Pull out the float switch unit.
- Press the two tabs on the protecting tube.
- Pull down the protecting tube.
- Check and clean the float switch pipe.
- [Note]: Verify the float switch operates correctly before refitting the cover.
- [Note]: Lubricate the O-ring seat of the float switch in the motor flange for easier fitting.
Carbon Filter
- Replace the carbon filter annually for optimal function.
- [Note]: Alternatively, Sololift can be vented via a venting pipe, which requires a venting valve. Product number: 98059587.
8. Technical Data
| Specification | Value |
|---|---|
| Supply Voltage | 1 x 220-240 V - 10%/+6%, 60 Hz |
| Power Consumption | 630 W |
| Power Factor | Cos φ 0.95 |
| Speed | 3400 min⁻¹ |
| Rated Current | 3.1 A |
| Insulation Class | F |
| Noise Level | < 70 dB(A) to 12050-2 |
| Flow Rate | Max. 178 l/min |
| System Pressure (Max. pump head) | 9.0 m |
| Max System Head | 6.0 m |
| [Note]: System pressure should not exceed 6 m head to guarantee sufficient drain of connected sanitary appliances. | |
| Supply Cable | 1.5 m, 0.75 mm² (H05VV-F-3G) |
| Net Weight | 6.6 kg |
| Start Level 1 | 65 mm above floor level |
| Start Level 2 | 115 mm above floor level |
| Stop Level | 35 mm above floor level |
| Liquid Temperature | 75 °C continuously (90 °C for 30 min.) |
| Ambient Temperature | +5 °C to +40 °C |
| Duty Cycle | S3 - 50 % - 1 min. (30 sec. on; 30 sec. off) |
| Marking | CE |
| Approvals | See document image for specific approval marks (e.g., DE, EMV). |
9. Fault Finding
[Warning]: Before troubleshooting, disconnect the power supply (remove fuse, pull plug, or switch off at mains). Ensure power cannot be accidentally switched on. All rotating parts must be stationary. Troubleshooting must only be performed by trained service personnel. Refer to section 7.3 for service instructions.
| Fault | Cause | Remedy |
|---|---|---|
| 1. Motor does not start when the level in the tank reaches the start level. | a) Supply failure. b) Fuse blown. If new fuse blows immediately, check cable or motor. c) Impeller stuck. Thermal switch tripped. | a) Reestablish power supply. b) Replace fuse. Measure cable and motor; replace defective parts if necessary. c) Free the impeller and wait for the motor to cool down and the thermal switch to reset. |
| d) Float switch stuck. | Remove the float switch and clean the pipe. | |
| 2. Motor hums but does not operate. | a) Impeller stuck. b) Motor or capacitor defective. | a) Free the impeller and check for free rotation. b) Replace the motor or capacitor. |
| 3. Motor runs continuously or at irregular intervals. | a) Water leaking from inlet into tank. b) Water leaking back into tank from discharge pipe. c) Float switch defective or stuck. | a) Check for leaking appliances. b) Check the non-return flap. c) Clean or replace the float switch unit. |
| 4. Motor runs but does not evacuate water. | a) Pump or tank blocked. b) Air lock in pump or vent hole in pump housing blocked. c) Discharge port or pipe blocked. | a) Remove blockage. b) Check vent valve operation in the tank. Ensure carbon filter is not wet. Ensure vent hole in pump housing is not blocked. c) Remove blockage. Check the non-return flap. |
| 5. The lifting station evacuates slowly. | a) Discharge pipe is too long or has excessive bends. b) The pump housing is leaky. c) Hydraulics blocked. | a) Increase discharge pipe size (max 40 mm). Reroute pipework to reduce bends. Use soft bends. b) Replace the pump housing (service part). c) Check motor shaft rotation; remove motor flange to clean impeller. |
| 6. Rattling noise from the lifting station, but water is evacuated. | a) Foreign body hitting the impeller. | Remove the foreign body. |
| 7. Odour from the tank. | a) Carbon filter contaminated. | Replace the carbon filter. |
| 8. Water from shower or another appliance connected to the lower inlets drains off slowly. Backflow from the lifting station. | a) Hydraulics blocked. b) The start level has changed. c) Inlet pipe diameter is too small. | a) Check motor shaft rotation; remove motor flange to clean impeller. b) Check and clean the float switch pipe. c) Use a pipe with a larger diameter. |
10. Disposal
Dispose of this product or its parts in an environmentally sound manner:
- Use public or private waste collection services.
- If not possible, contact the nearest Grundfos company or service workshop.
Subject to alterations.
Appendix - Diagram Descriptions
The following descriptions correspond to the diagrams in the original document's appendix, illustrating installation and service procedures.
Installation Steps
- Diagram 1 (Page 8): Illustrates the general setup of the Sololift2 C-3 connected to a sink.
- Step 1.1: Shows electrical safety precautions: unplugging the unit and turning off the power switch. A warning symbol is displayed.
- Step 1.2: Demonstrates lifting the Sololift2 unit using its handles.
- Step 1.3: Details removing the cover of the Sololift2 unit using a screwdriver.
- Step 1.4: Shows connecting the Sololift2 unit to a sink's waste outlet, with the power cable connected and the switch in the 'off' position.
Service Steps
- Step 2.1 (Page 9): Illustrates using a drill (specified as >2500 rpm) to turn the motor shaft for freeing a stuck impeller. A warning symbol is shown.
- Step 2.2: Depicts a toilet bowl, indicating the unit's suitability for such connections.
- Step 3.1: Shows connecting the discharge pipe to the Sololift2 unit.
- Step 3.2: Illustrates lifting the motor-pump unit out of the tank.
- Step 3.3: Provides a close-up view of releasing the motor-pump unit, possibly by disengaging clips or a locking mechanism.
- Step 3.4: Shows using a screwdriver to assist in removing the motor-pump unit.
- Step 3.5: Depicts the motor-pump unit being placed back into the tank.
- Step 3.6: Shows cleaning the impeller, possibly with a brush or cloth.
- Step 4.1: Illustrates the removal of the carbon filter housing (labeled 1), the float switch unit (labeled 2), and the discharge pipe connection (labeled 3). Step 5 shows the removal of the cover.
- Step 4.2: Shows a close-up of the float switch mechanism, with an eye symbol indicating inspection.
- Step 5: Depicts placing the new carbon filter into its housing.
