1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Pedrollo CPm620 Centrifugal Pump. Please read this manual thoroughly before installation or operation to ensure proper use and to prevent damage or injury.
The Pedrollo CPm620 is a reliable centrifugal pump designed for use with clean water and liquids that are not chemically aggressive towards the pump's materials. It is widely used in domestic and civil applications, including water distribution in combination with small and medium-sized pressure sets, liquid transfer, and garden/allotment irrigation. For optimal performance and longevity, the pump should be installed in an enclosed environment or sheltered from inclement weather.
Figure 1: Pedrollo CPm620 Centrifugal Pump. This image shows the blue-colored centrifugal pump from a three-quarter front view, highlighting its robust construction and the motor housing.
2. Safety Information
WARNING: Failure to follow these safety instructions could result in electric shock, fire, serious injury, or death.
- Always disconnect power before servicing or performing any maintenance on the pump.
- Ensure the pump is properly grounded according to local electrical codes.
- Do not operate the pump with flammable or explosive liquids.
- Protect the pump from freezing temperatures.
- Ensure all connections are secure and leak-free before operation.
- Do not run the pump dry. This can cause severe damage to the pump.
- Keep children and unauthorized personnel away from the pump during operation.
3. Setup and Installation
Proper installation is crucial for the pump's performance and longevity. Follow these guidelines:
- Location: Install the pump in a dry, well-ventilated area, protected from direct sunlight, rain, and freezing temperatures. The pump should be installed in an enclosed environment, or at least sheltered from inclement weather.
- Mounting: Secure the pump to a solid, level surface using appropriate bolts to minimize vibration.
- Piping:
- Use pipes of adequate diameter to minimize friction losses.
- Ensure all pipe connections are airtight, especially on the suction side, to prevent air ingress.
- Install a foot valve with a strainer at the end of the suction pipe to prevent debris from entering the pump and to maintain prime.
- Install a gate valve on both the suction and discharge sides for isolation during maintenance.
- Electrical Connection:
- Connect the pump to a power supply matching the pump's voltage and frequency (V.230/60HZ).
- Ensure proper grounding.
- Install appropriate circuit protection (e.g., circuit breaker or fuse).
- Priming: Before first use, or if the pump has run dry, fill the pump casing completely with clean water through the priming port until water overflows. Replace the priming plug securely.
4. Operating Instructions
Once installed and primed, the pump is ready for operation:
- Initial Start-up: Ensure all valves are open and the pump is primed. Turn on the power supply. The pump should start immediately and begin transferring liquid.
- Monitoring: Observe the pump during operation for any unusual noises, vibrations, or leaks. Check pressure gauges if installed.
- Shut-down: To stop the pump, turn off the power supply. If the pump will be out of service for an extended period, especially in cold climates, drain the pump and piping to prevent freezing damage.
Figure 2: Characteristic Curves and Performance Data for Pedrollo CP series pumps at 60 Hz. This chart illustrates the relationship between Head (H) in meters and Flow Rate (Q) in liters per minute (l/min) for various CP models, including CP620, showing their hydraulic performance under different operating conditions.
5. Maintenance
Regular maintenance ensures optimal performance and extends the pump's lifespan:
- Routine Inspection: Periodically check for leaks, unusual noises, or excessive vibration.
- Cleaning: Keep the pump exterior clean and free from debris. Ensure ventilation openings are not obstructed.
- Winterization: In areas prone to freezing, drain the pump and associated piping completely if it will not be used during cold periods. Store in a dry, protected environment.
- Motor Bearings: The motor bearings are typically sealed and lubricated for life, requiring no maintenance.
- Mechanical Seal: The mechanical seal is a wear part. If leaks occur from the seal area, it may need replacement by a qualified technician.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power; Motor overload; Seized impeller | Check power supply/breaker; Reset overload; Inspect/clear impeller |
| Pump runs but no water/low flow | Pump not primed; Air leak in suction line; Clogged impeller/strainer; Suction lift too high | Re-prime pump; Check suction connections; Clean impeller/strainer; Reduce suction lift |
| Excessive noise/vibration | Cavitation (air in system); Misalignment; Worn bearings | Ensure proper priming/no air leaks; Check mounting; Contact service for bearings |
| Pump leaks | Loose connections; Damaged mechanical seal | Tighten connections; Replace mechanical seal (professional service recommended) |
7. Specifications
Key technical specifications for the Pedrollo CPm620 Centrifugal Pump:
- Liquid Type: Clean Water
- Uses: Domestic, Civil
- Applications: Water supply systems, air conditioning systems, pressure systems, cooling systems, irrigation pumps, liquids transfer
- Typology: Surface
- Family: Centrifugal
- Temperature of Liquid: -10 °C to +90 °C
- Ambient Temperature: Up to +40 °C
- Manometric Suction Lift: Up to 7 m
- Max. Working Pressure: 6 bar (for CP 100-130-132-150-158) / 10 bar (for CP 170-190-200) - Note: CPm620 falls under the 6 bar category.
- Horsepower: 1 HP
- Item Weight: Approximately 25 pounds
- Power Supply: 230V / 60Hz
Figure 3: Dimensions and Weight Table for Pedrollo CP series pumps. This table provides detailed measurements in millimeters (mm) and weights in kilograms (kg) for various single-phase and three-phase CP models, including the CPm620, showing port sizes (DN1, DN2) and overall dimensions (a, f, h, h1, h2, n, n1, w, s).
For detailed dimensions of the CPm620 model, please refer to Figure 3 and locate the row corresponding to "CPm 620" in the table.
8. Warranty and Support
Pedrollo products are manufactured to high-quality standards. For warranty information, please refer to the documentation provided with your purchase or contact your authorized Pedrollo dealer. Keep your purchase receipt as proof of purchase.
For technical support, spare parts, or service, please contact your local Pedrollo distributor or the retailer from whom you purchased the pump. Provide your pump's model number (CPm620) and serial number (if applicable) when seeking assistance.
