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General| Type | Centrifugal pump |
|---|---|
| Material | Stainless steel |
| Motor range | 0.37 kW to 22 kW |
| Applications | Water supply |
| Impeller Material | Stainless steel |
| Connections | Flanged |
| Speed | 2900 rpm |
| Temperature range | -20°C to +120°C (depending on model and material) |
Explanation of symbols used to denote warnings, cautions, and notes in the document.
Overview of the CR range centrifugal pumps, their applications, and key characteristics.
Guidelines for safely lifting the pump and motor assembly using appropriate straps.
Instructions to verify the pump model against the order using the nameplate data.
Procedure for inspecting the pump for damage that may have occurred during shipping.
Safety warnings and requirements for electrical connections and grounding.
Details on information provided on the pump's nameplate.
Explanation of the coding system used to specify pump models and configurations.
Information on how ambient temperature and altitude affect motor loading and cooling.
Table specifying the permissible liquid temperature ranges for different pump types.
Guidance on minimum required inlet pressure for pump operation.
Recommendations for selecting a suitable location for the pump installation.
Requirements for a secure and stable mounting base for the pump.
Recommended torques for pump mounting bolts and flange connections.
Guidelines for sizing and installing the suction pipe to minimize friction losses.
Recommendations for installing discharge piping, including check valves and isolation valves.
Instructions for installing a bypass line to ensure minimum flow for cooling and lubrication.
Table of permissible flange forces and torques for different pump models.
Table showing minimum flow rates required for continuous operation at different temperatures.
Guidance on when a check valve is required on the discharge side of the pump.
Information on temperature rise when flow is stopped and time limits to avoid damage.
Safety warnings and procedures for making electrical connections to the motor.
Description of standard motor types supplied with Grundfos CR pumps.
Instructions on how to rotate the motor terminal box for installation flexibility.
Guidelines for field wiring, including conductor sizing and starting methods.
Requirements for motor protection, including circuit breakers and overload settings.
Step-by-step procedure for priming the pump before starting operation.
Detailed instructions for starting the pump, including checks for rotation and connections.
General information on efficient operation and service life of CR pumps.
Guidelines on maximum permissible pump start/stop cycles per hour to prevent motor failure.
Specific considerations for using CR pumps in boiler feed applications.
Recommendations for draining the pump and system to prevent damage from freezing.
Routine inspection procedures for the motor, focusing on cleanliness and electrical connections.
Information on motor bearing lubrication, including types of grease and service intervals.
Table specifying recommended lubricants based on severity of duty and ambient temperature.
Chart detailing lubrication intervals and quantities for motors with grease zerks.
Step-by-step guide for applying grease to motor bearings, including precautions.
Instructions for safely removing the motor from the pump assembly.
Procedures for mounting and aligning a replacement motor to the pump.
Torque values for coupling screws used when replacing the motor.
Information on obtaining an extensive list of spare parts for CR pumps.
Instructions for measuring supply voltage and interpreting the readings.
Explanation of acceptable voltage variations and potential consequences of deviations.
Procedure for measuring motor current and interpreting the results.
Analysis of current measurements to diagnose potential motor faults or imbalances.
Method for measuring motor winding insulation resistance.
Criteria for acceptable insulation resistance values and implications of low readings.
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