1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Pedrollo 4CR 100-N Multistage Centrifugal Pump. Please read this manual thoroughly before installation or use and keep it for future reference.
1.1 Intended Use
The Pedrollo 4CR 100-N pump is designed for use with clean water and liquids that are not chemically aggressive to the materials from which the pump is made. It is suitable for domestic and civil applications, including water distribution in conjunction with small and medium pressure sets, garden watering, and irrigation systems. Its quiet operation makes it ideal for residential environments.
1.2 Application Limits
- Liquid temperature: -0°C to +40°C
- Ambient temperature: Up to +40°C
- Manometric suction lift: Up to 7 meters maximum
- Maximum working pressure: 7 bar
- Continuous service: S1
2. Safety Instructions
Always observe the following safety precautions to prevent personal injury and damage to the pump.
- Ensure the pump is installed by qualified personnel in accordance with local regulations and standards.
- Disconnect power before performing any installation, maintenance, or repair work.
- Do not operate the pump dry; ensure it is always primed with water before starting.
- Protect the pump from freezing temperatures.
- Ensure proper grounding of the electrical connection.
- Do not use the pump for flammable, corrosive, or explosive liquids.
3. Unpacking and Inspection
- Carefully remove the pump from its packaging.
- Inspect the pump for any visible damage that may have occurred during transit. If damage is found, contact your supplier immediately.
- Verify that all components listed in the packing list are present.
4. Installation
4.1 Mechanical Installation (Plumbing)
- Mount the pump on a solid, level surface to minimize vibration.
- Ensure the pump is installed in a dry, well-ventilated area, protected from direct sunlight and adverse weather conditions.
- Use pipes of adequate diameter to avoid excessive pressure drops. The inlet and outlet connections are 1 inch.
- Install a foot valve with a strainer on the suction line to prevent debris from entering the pump and to maintain prime.
- Ensure all pipe connections are airtight to prevent air leaks, which can affect pump performance.
- Install isolation valves on both suction and discharge lines for easier maintenance.
4.2 Electrical Connection
- The pump requires a three-phase 400V, 50Hz power supply.
- Electrical connections must be performed by a qualified electrician in compliance with local electrical codes.
- Ensure the power supply matches the pump's voltage and frequency ratings.
- Install appropriate circuit breakers or fuses for motor protection.
- Connect the pump to a properly grounded electrical system.
- Verify the motor's rotation direction. If incorrect, reverse two of the phase wires.
Figure 1: Technical diagram illustrating the pump's dimensions, characteristic curves, and component breakdown. This image provides critical information for installation planning and understanding performance.
5. Setup
- Priming the Pump: Before initial startup, completely fill the pump casing and the suction line with clean water through the priming port. This is crucial to prevent dry running.
- Check for Leaks: After filling, inspect all connections for any leaks.
- Power Check: Briefly turn on the power to check the motor's rotation direction. If the rotation is incorrect (e.g., indicated by a label or arrow on the motor), immediately turn off the power and reverse two of the phase wires.
6. Operating Instructions
- Starting the Pump: Ensure the pump is fully primed. Open the discharge valve slightly, then switch on the power. Gradually open the discharge valve completely once the pump is running smoothly.
- Monitoring: During operation, monitor for unusual noises, excessive vibration, or leaks. Ensure the pump is delivering water at the expected flow and pressure.
- Stopping the Pump: Close the discharge valve, then switch off the power.
- Extended Shutdown: If the pump will be out of service for an extended period, especially in freezing conditions, drain all water from the pump and piping to prevent damage.
7. Maintenance
Regular maintenance ensures optimal performance and extends the pump's lifespan.
- Regular Inspection: Periodically check for leaks, unusual noises, or vibrations.
- Cleanliness: Keep the pump and motor free from dust and debris to ensure proper cooling.
- Foot Valve/Strainer: Inspect and clean the foot valve strainer regularly to prevent blockages.
- Winterization: In areas prone to freezing, drain the pump and associated piping completely or protect them from freezing temperatures.
- Professional Service: For internal component inspection or replacement (e.g., seals, bearings), consult a qualified service technician.
8. Troubleshooting
This section addresses common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power supply; Motor overload; Faulty wiring | Check power connection and circuit breaker; Allow motor to cool and reset overload; Inspect wiring. |
| Pump runs but delivers no water | Pump not primed; Air leak in suction line; Suction lift too high; Clogged foot valve/strainer | Prime the pump; Check all suction connections for leaks; Reduce suction lift; Clean foot valve/strainer. |
| Low flow or pressure | Partial blockage; Air in system; Worn impeller; Incorrect motor rotation | Check for blockages in piping; Bleed air from system; Inspect impeller (professional service); Verify motor rotation. |
| Excessive noise or vibration | Cavitation (air in water); Loose mounting; Worn bearings | Ensure pump is fully primed and no air leaks; Secure pump mounting; Contact service for bearing inspection. |
9. Technical Specifications
Detailed specifications for the Pedrollo 4CR 100-N Multistage Centrifugal Pump.
Figure 2: The Pedrollo 4CR 100-N Multistage Centrifugal Pump, featuring a stainless steel body and a robust electric motor.
| Specification | Value |
|---|---|
| Model | 4CR 100-N |
| Part Number | 43CR1004A |
| Power Supply | Three phase 400V, 50Hz |
| Motor Power | 0.75 kW (1 Hp) |
| Flow Rate (Q) | 5 to 130 L/min |
| Head (H) | Up to 50.5 meters |
| Inlet/Outlet Connections | 1 inch |
| Pump Body Material | Stainless Steel AISI 304 |
| Impeller Material | Noryl |
| Motor Efficiency Class | IE2 |
| Item Weight | 10 kg |
| Power Source Type | Corded Electric |
10. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your authorized Pedrollo dealer. For technical support, spare parts, or service, please contact your local Pedrollo service center or the retailer from whom you purchased the pump. Always provide the model number (4CR 100-N) and part number (43CR1004A) when seeking support.
