Grundfos CRN 5 - User Manual

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

Grundfos CRN 5 Specifications

General

Max temperature	120 °C
Enclosure Class	IP55
Frequency	50/60 Hz
Pump Type	Multistage centrifugal pump
Material	Stainless steel
Liquid Temperature Range	+120°C
Impeller Material	Stainless steel
Pump Head Material	Stainless steel

Summary

Limited Warranty

General Information

Safety Symbols and Statements

Defines hazard signal words (DANGER, WARNING, CAUTION) and symbols for safe operation.

Receiving the Product

Handling and Inspection Procedures

Covers safe transport, lifting, unpacking, and inspection of the pump for damage or correctness.

Identification

Nameplate Data Explained

Explanation of the information provided on the pump's nameplate, including model, ratings, and specifications.

Mechanical Installation

Site Preparation and Mounting

Covers pump location, foundation, lifting, and outdoor installation for safe and stable setup.

Piping and Bypass Installation

Guidance on inlet/outlet piping, bypass arrangements, and pump mounting for proper operation.

Electrical Connection

Motor Protection Measures

Starting Up the Product

Priming Procedures

Startup Procedures and Checks

Operating the Product

Maintaining the Pump

Maintaining the Motor

Motor Inspection and Lubrication

Replacing the Motor

Motor Removal and Installation

Coupling Adjustment Procedures

Preliminary Electrical Tests

Voltage, Current, and Resistance Checks

Covers procedures for measuring supply voltage, motor current, and insulation resistance for pre-startup verification.

Startup of Pump with Air-Cooled Top (Cool-Top)

Diagnosing Specific Problems

Worksheet for Three-Phase Motors