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Grundfos CR 20 - User Manual

Grundfos CR 20
37 pages
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GRUNDFOS INSTRUCTIONS
CR, CRI, CRN, CRT
Installation and operating instructions

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Grundfos CR 20 Specifications

General IconGeneral
BrandGrundfos
ModelCR 20
CategoryWater Pump
LanguageEnglish

Summary

2. General information

2.1 Hazard statements

Symbols and statements indicating hazards during operation.

4. Receiving the product

4.3 Lifting instructions

Safe procedures and equipment for lifting the pump.

5.2 Type keys

5.2.4 Codes

7.4 Maximum inlet pressures

7.5 Maximum operating pressures

8. Mechanical installation

Contamination Warning

Precautions for drinking water installation.

8.5 Pump mounting

Pressurised system Warning

Safety warning about pressurized systems.

8.8 Bypass

8.9 Flange forces and torques

8.10 Minimum continuous duty flow rates [gpm]

8.12 Temperature rise

9. Electrical connection

Electrical Safety Warnings

Critical safety warnings regarding electrical shock hazards.

10. Starting up the product

Liquid Handling Safety

Safety precautions for corrosive, toxic, hot, or cold liquids.

10.1 Priming

10.2 Startup instructions

Startup Safety Precautions

Warnings for contamination, noise, pressure, and temperature during startup.

12. Servicing the product

General Servicing Safety

Critical safety warnings for servicing electric shock, falling objects, and liquid hazards.

13. Maintaining the pump

Pump Maintenance Safety

Warnings for electric shock and falling objects during pump maintenance.

14. Maintaining the motor

Motor Maintenance Safety

Warnings for electric shock and falling objects during motor maintenance.

14.2 Motor lubrication

15. Replacing the motor

Motor Replacement Safety

Warnings for electric shock and falling objects during motor replacement.

15.2.2 CRT 2, 4, 8 and 16 Assembly

15.2.3 CR 10, 15 and 20 Assembly

15.2.5 CR, CRN 32, 45 and 64 Assembly

17. Preliminary electrical tests

Electrical Test Safety

Warnings for electric shock before performing electrical tests.

18. Startup of pump with air-cooled top (Cool-Top)

19. Diagnosing specific problems

Troubleshooting Safety

Warnings for electric shock before troubleshooting.

Pump Does Not Run

Troubleshooting steps for a pump that fails to start.

19. Diagnosing specific problems (Continued)

Reduced Performance or No Water Delivery

Troubleshooting steps for low output or no flow.

Fuse;Breaker Tripping

Troubleshooting steps for blown fuses or tripped breakers.

20. Worksheet for three-phase motors

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