1. Introduction
This user manual provides essential information for the safe and efficient installation, operation, and maintenance of the Wilo Yonos Pico 25/1-6 domestic circulator pump. This high-efficiency pump is designed for hot water heating, air conditioning, and industrial circulation systems. Please read these instructions thoroughly before commencing any work with the pump.
Figure 1: Wilo Yonos Pico 25/1-6 Domestic Circulator Pump. The image shows the green pump housing connected to a silver-grey control unit with a digital display and a red rotary knob.
2. Safety Instructions
Failure to follow these safety instructions may result in personal injury or damage to the equipment. Keep this manual accessible for future reference.
- Qualified Personnel: Installation and maintenance must only be performed by qualified and authorized personnel in accordance with local regulations and standards.
- Electrical Safety: Ensure the power supply is disconnected before any installation or maintenance work. All electrical connections must comply with local electrical codes.
- Hot Surfaces/Water: The pump and connected pipes may become hot during operation. Allow the system to cool down before handling.
- Operating Limits: Do not operate the pump outside its specified operating limits (voltage, temperature, pressure).
- Protection: Ensure the pump is protected from frost and direct exposure to weather elements.
3. Product Overview
The Wilo Yonos Pico 25/1-6 is a high-efficiency, electronically controlled circulator pump designed for various heating and air conditioning applications. Its compact design and advanced features ensure reliable and energy-efficient operation.
Key Features:
- Simple circulation pump for heating and air conditioning systems.
- High-efficiency motor with electronic control.
- Digital display for operational status and settings.
- User-friendly interface with a rotary knob for adjustments.
4. Installation
Proper installation is crucial for the pump's performance and longevity. Always ensure the system is depressurized and drained before installation.
Installation Steps:
- Mounting Position: Install the pump in a horizontal position with the motor shaft horizontal. Ensure sufficient space for ventilation and maintenance.
- Pipe Connection: Connect the pump to the piping system using appropriate fittings. Ensure all connections are watertight. Avoid mechanical stress on the pump from the piping.
- Electrical Connection: Connect the pump to the electrical supply according to the wiring diagram provided with the product and local electrical regulations. Ensure proper grounding. The pump operates on 230 Volts (AC).
- Filling and Venting: After installation, fill the system with the appropriate fluid and vent the pump thoroughly to remove any trapped air.
5. Initial Setup
Once installed and electrically connected, the pump requires initial setup.
- Power On: Restore power to the pump. The digital display will illuminate.
- Operating Mode Selection: Use the rotary knob on the control unit to select the desired operating mode (e.g., constant differential pressure, variable differential pressure, fixed speed). Refer to the pump's specific display icons for mode identification.
- Setting Adjustment: Adjust the required head or speed setting using the rotary knob. The display will show the current setting or power consumption.
6. Operation
The Wilo Yonos Pico 25/1-6 is designed for continuous operation. Once set up, it will automatically adjust its performance based on the selected operating mode and system requirements.
- Monitoring: Periodically check the digital display for current operating status and any error codes.
- Adjustments: If system requirements change, you can re-adjust the operating mode or settings using the rotary knob.
- Shutting Down: To temporarily stop the pump, disconnect its power supply. For extended periods of non-use, follow maintenance guidelines for storage.
7. Maintenance
The Wilo Yonos Pico 25/1-6 is largely maintenance-free. However, periodic checks can help ensure optimal performance and extend its lifespan.
- Visual Inspection: Regularly inspect the pump for any signs of leaks, corrosion, or unusual wear.
- System Pressure: Ensure the system pressure is within the recommended range for the pump.
- Cleaning: Keep the exterior of the pump and the control unit clean and free from dust and debris to ensure proper ventilation.
- Winterization: If the pump is installed in an area prone to freezing temperatures and the system is shut down, ensure the pump and pipes are drained to prevent frost damage.
8. Troubleshooting
Before contacting technical support, review the following common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power supply; electrical fault; seized rotor | Check power connection and circuit breaker; consult an electrician; attempt to free rotor (if accessible and safe). |
| Insufficient flow/pressure | Air in system; incorrect operating mode/setting; clogged filter | Vent the system; adjust pump settings; check and clean system filter. |
| Unusual noise/vibration | Air in system; cavitation; foreign object in pump; improper mounting | Vent the system; check system pressure; inspect pump for obstructions; ensure secure mounting. |
| Error code on display | Specific internal fault | Refer to the pump's detailed error code list (if available in separate documentation) or contact Wilo service. |
9. Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | WILO |
| Model Reference | 4164026/14W01 |
| Material | Cast Iron, Stainless Steel |
| Power Source | Electric Cable |
| Voltage | 230 Volts (AC) |
| Maximum Flow Rate | 2.5 Cubic Meters per hour |
| Item Weight | 2.16 Kilograms |
| Package Dimensions | 19 x 19 x 11 cm |
| Style | Above Ground |
| Batteries Required | No |
| Spare Parts Availability | Information unavailable |
10. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your seller. For technical support or inquiries regarding spare parts, please contact Wilo customer service or an authorized Wilo service partner.
Manufacturer: WILO
Model: Yonos Pico 25/1-6
Reference: 4164026/14W01
