Wilo Top S 2 x 40 Wet Rotor Hydronics Circulating Pump

1. Important Safety Information

Please read and understand all instructions before installing, operating, or performing maintenance on this pump. Failure to follow these instructions may result in electric shock, fire, serious injury, or property damage. Retain this manual for future reference.

• Electrical Safety: Ensure power supply is disconnected before any installation or maintenance. All electrical wiring must be performed by a qualified electrician and comply with local codes and regulations.
• Pressure Safety: This pump operates under pressure. Ensure all connections are secure and leak-free before operation.
• Temperature Safety: The pump handles fluids up to +130°C (266°F) and short-term up to +140°C (284°F). Exercise caution to avoid burns from hot surfaces or fluids.
• Installation: This pump is designed for hydronic circulating applications. Do not use for purposes other than its intended use.

2. Product Overview

The Wilo Top S 2 x 40 is a wet rotor hydronics circulating pump designed for residential and light commercial applications. It features a robust construction from stainless steel, polypropylene, and metal-impregnated carbon, ensuring durability and efficient performance. This model includes a two-speed motor for manual capacity adjustment.

Figure 1: Wilo Top S 2 x 40 Wet Rotor Hydronics Circulating Pump. This image displays the main unit of the circulating pump, highlighting its compact design and connection points.

Key Features:

• Wet rotor, seal-less design for quiet and maintenance-free operation.
• Two pre-selectable speed stages for manual capacity adjustment.
• Constructed from stainless steel, polypropylene, and metal-impregnated carbon for durability.
• Cataphoretic coated pump housing for enhanced corrosion resistance.
• Permitted temperature range: -20°C to +130°C (short-term to +140°C).
• Pump communication based on simple plug technology for reliable retrofitting.

3. Installation and Setup

Proper installation is crucial for the safe and efficient operation of your Wilo circulating pump. It is highly recommended that installation be performed by a qualified professional.

3.1 Pre-Installation Checks:

• Verify that the pump's voltage (115-Volt) matches your electrical supply.
• Ensure the installation location is suitable, providing adequate space for maintenance and ventilation.
• Confirm that the system piping is clean and free of debris.

3.2 Mechanical Installation:

• The pump requires 4 Bolt 2-Inch HV flanges (not included) for connection to the piping system. Ensure these flanges are correctly sized and installed.
• Install the pump in a horizontal position with the motor shaft horizontal to prevent air pockets and ensure proper lubrication.
• Use appropriate gaskets and tighten flange bolts evenly to prevent leaks.
• Support the pump and piping adequately to prevent strain on the connections.

3.3 Electrical Connection:

• All electrical work must comply with national and local electrical codes.
• Connect the pump to a dedicated, properly fused electrical circuit.
• Ensure proper grounding of the pump.
• Refer to the wiring diagram provided with the pump for specific connection details.

4. Operating Instructions

Once installed and electrically connected, the Wilo Top S 2 x 40 pump is ready for operation.

4.1 Initial Start-up:

• Before starting, ensure the system is filled with fluid and properly vented to remove any air.
• Open all necessary valves in the system.
• Apply power to the pump. The pump should start circulating fluid.
• Check for any unusual noises or vibrations.

4.2 Speed Adjustment:

The Wilo Top S 2 x 40 features two pre-selectable speed stages. These can be adjusted manually to optimize flow rate and energy consumption for your specific hydronic system requirements. Consult your system design for the appropriate speed setting.

4.3 Normal Operation:

The pump is designed for continuous operation within its specified temperature range of -20°C to +130°C. Monitor the system for consistent performance and absence of leaks.

5. Maintenance

The Wilo Top S 2 x 40 wet rotor design is largely maintenance-free. However, periodic checks are recommended to ensure optimal performance and longevity.

5.1 Regular Checks:

• Visual Inspection: Periodically inspect the pump for any signs of leaks, corrosion, or damage to the housing or electrical connections.
• Noise and Vibration: Listen for any unusual noises or excessive vibrations, which could indicate a problem.
• System Pressure: Ensure the system pressure remains within the recommended operating range.

5.2 Cleaning:

Keep the exterior of the pump clean and free of dust and debris to ensure proper heat dissipation.

5.3 Winterization:

If the pump is installed in an unheated area subject to freezing temperatures, ensure the system is properly drained or protected with antifreeze to prevent damage.

6. Troubleshooting

This section provides solutions to common issues you might encounter with your Wilo circulating pump. For complex problems, contact a qualified technician.

7. Specifications

Detailed technical specifications for the Wilo Top S 2 x 40 Circulating Pump, Model 2067579.

8. Warranty and Support

8.1 Warranty Information:

Wilo Commercial Building Services products, including this circulating pump, come with a 2-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use and service. Please retain your proof of purchase for warranty claims.

8.2 Customer Support:

For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Wilo customer service. Have your pump model number (2067579) and date of purchase ready when contacting support.

You can find contact information for Wilo customer service on their official website or through your local distributor.