Grundfos CRN 32 - User Manual

GRUNDFOS INSTRUCTIONS
CR, CRI, CRN, CRT
Installation and operating instructions

Grundfos CRN 32 Specifications

General

Brand	Grundfos
Model	CRN 32
Category	Water Pump
Language	English

Summary

1. Limited warranty

2. General information

2.1 Hazard statements

Symbols and statements about hazards in Grundfos instructions.

4. Receiving the product

4.3 Lifting instructions

Guidelines for safely lifting the pump.

4.4 Inspecting the product

Steps to check the product upon arrival.

4.5 Ensure you have the right pump

5. Identification

5.1 Nameplate data

Explanation of information found on the pump nameplate.

5.2 Type keys

7. Operating conditions

7.2 Liquid temperatures

7.3 Minimum inlet pressures

Required minimum inlet pressure (NPSHR).

7.4 Maximum inlet pressures

8. Mechanical installation

8.1 Lifting the product

Warnings and instructions for lifting the pump.

8.2 Pump location

8.4 Foundation

8.5 Pump mounting

8.5.1 Recommended installation torques

8.6 Inlet pipe

8.6.1 Inlet pipe sizes

8.9 Flange forces and torques

8.10 Minimum continuous duty flow rates [gpm]

8.12 Temperature rise

9. Electrical connection

9.3 Field wiring

9.4 Motor protection

Methods for protecting the motor from electrical faults.

10. Starting up the product

10.1 Priming

Steps to fill and vent the pump before starting.

10.2 Startup instructions

11. Operating the product

11.1 Operating parameters

11.2 Pump cycling

11.4 Frost protection

13. Maintaining the pump

14. Maintaining the motor

14.1 Motor inspection

14.2 Motor lubrication

15. Replacing the motor

15.1 Disassembly

15.2 Assembly

17. Preliminary electrical tests

17.1 Supply voltage

How to measure and interpret supply voltage.

17.2 Current

How to measure and interpret motor current.

17.3 Insulation resistance

How to measure and interpret motor winding insulation.

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

19. Diagnosing specific problems

1. The pump does not run.

Troubleshooting steps for a pump that fails to start.

2. The pump runs but at reduced performance or does not deliver water.

Troubleshooting steps for reduced pump performance or no water delivery.

3. Pump cycles too much

Troubleshooting steps for excessive pump cycling.

4. Fuses blow or circuit breakers or overload relays trip

Troubleshooting steps for tripping protection devices.

20. Worksheet for three-phase motors