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Grundfos CRN 10 - User Manual

Grundfos CRN 10
37 pages
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GRUNDFOS INSTRUCTIONS
CR, CRI, CRN, CRT
Installation and operating instructions

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Grundfos CRN 10 Specifications

General IconGeneral
Protection ClassIP55
Insulation ClassF
Pump TypeCentrifugal
Power Consumption0.37 - 1.5 kW
MaterialStainless Steel
Max Temperature120°C
Pump Housing MaterialStainless Steel
Frequency50 Hz / 60 Hz
ApprovalsCE
Liquid Temperature Range-10°C to +120°C

Summary

Pump Type Key Decoding

Pump Specification Codes

Pump Version, Pipe Connection, and Material Codes

Detailed explanations of codes used for pump version, pipe connection, and materials.

Pump Specification Codes (Continued)

Shaft Seal and Rubber Part Codes

Detailed explanations of codes used for shaft seals and rubber parts.

Applications and Operating Conditions

Pressure Limits for Pump Operation

Mechanical Installation Procedures

Pump Mounting and Piping Installation

Recommended Installation Torques and Inlet Pipe Sizing

Torque values for mounting and recommended minimum inlet pipe sizes.

Bypass Arrangement for Pump Cooling

Flange Forces and Torque Limits

Temperature Rise and Electrical Connection

Electrical Connection Safety and Guidelines

Crucial safety warnings and general instructions for electrical connections.

Motor Specifications and Protection

Field Wiring and Motor Protection Methods

Guidelines for field wiring, starting methods, and motor protection for different motor types.

Initial Pump Startup Procedures

Priming the Pump for Operation

Step-by-step guide on how to fill the pump with liquid and remove air.

Pump Startup and Operation Guidelines

Detailed Startup Instructions and Checks

Steps for starting the pump, including checking rotation and coupling guards.

Operating Parameters and Continuous Flow

Factors affecting performance and the importance of maintaining continuous flow to prevent damage.

Pump and Motor Maintenance

Motor Inspection Procedures

Steps for inspecting the motor, including cleaning, electrical checks, and winding resistance.

Motor Lubrication Details

Motor Replacement Procedures

Motor Disassembly and Assembly

Steps for safely removing the old motor and mounting the replacement motor.

CR 1 s, 1, 3, and 5 Motor Coupling Adjustment

Specific procedure for adjusting the motor coupling on CR 1s, 1, 3, and 5 models.

CR 10, 15, and 20 Motor Coupling Adjustment

Specific procedure for adjusting the motor coupling on CR 10, 15, and 20 models.

Motor Coupling Adjustment for Specific Models

Preliminary Electrical Tests

Supply Voltage Measurement and Interpretation

How to measure, interpret, and correct for supply voltage variations.

Current Measurement and Fault Diagnosis

Method for measuring motor current and diagnosing faults based on readings.

Insulation Resistance Testing

Procedure for measuring motor winding insulation resistance and its significance.

Diagnosing Specific Pump Problems

Troubleshooting: Pump Not Running

Guide to identifying and resolving issues when the pump fails to start or run.

Diagnosing Reduced Pump Performance

Troubleshooting: Reduced Performance or No Water Delivery

Steps to diagnose and fix problems related to low output or no water flow.

Troubleshooting: Excessive Pump Cycling

Identifying and resolving causes for frequent pump start-stop cycles.

Diagnosing Circuit Breaker or Overload Trips

Troubleshooting: Fuse or Overload Trips

Diagnosing and resolving issues that cause fuses or overload relays to trip.

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