Installation And Operating Instructions; Symbols Used In This Document; Handling; Type Designation - Grundfos CRT 2 Instrucciones De Instalación Y Funcionamiento

English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
1. Symbols used in this document
2. Handling
3. Type designation
3.1 Type key
4. Applications
5. Technical data
5.1 Ambient temperature and altitude
5.2 Maximum operating pressure and temperature limits
5.3 Minimum inlet pressure
5.4 Maximum operating pressure
5.5 Minimum flow rate
5.6 Electrical data
5.7 Frequency of starts and stops
5.8 Dimensions and weights
5.9 Sound pressure level
6. Installation
6.1 Foundation
6.2 Vibration dampening
6.3 Outdoor installation
6.4 Hot surfaces
6.5 Torques
6.6 Flange forces and torques
7. Electrical connection
7.1 Cable entry/screwed connection
7.2 Three-phase connection
7.3 Single-phase connection
7.4 Terminal box positions
7.5 Frequency converter operation
8. Startup
8.1 Shaft seal run-in
9. Maintenance
10. Frost protection
11. Service
11.1 Service kits and manuals
12. Fault finding
13. Disposal
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
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1. Symbols used in this document

Warning
Page If these safety instructions are not observed, it may
result in personal injury.
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Warning
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If these instructions are not observed, it may lead to
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electric shock with consequent risk of serious
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personal injury or death.
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If these safety instructions are not observed, it may
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Caution
result in malfunction or damage to the equipment.
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Notes or instructions that make the job easier and
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Note
ensure safe operation.
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2. Handling

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When lifting the entire pump with motor, follow these instructions:
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• Pump with motor sizes 0.37 - 5.5 kW:
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Lift the pump in the motor flange by means of straps or the
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like.
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• Pump with motor sizes 7.5 - 18.5 kW:
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Lift the pump by means of the lifting brackets on the motor
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side.
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The eyebolts on the motor side must only be used for
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Note
lifting.
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0.37 - 5.5 kW
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Fig. 1 Correct lifting of a CRT pump
In the case of a CRT pump with another motor make than MG, we
recommend you to lift the pump by means of straps in the motor
flange.

3. Type designation

3.1 Type key

Example
Type range
Rated flow rate in m
Number of impellers
Code for pump version
Code for pipework connection
Code for materials, excluding plastic and rubber parts
(A = basic version)
Code for rubber parts
Code for shaft seal
7.5 - 22 kW
CRT 8 - 12- X - X - X - X- XXXX
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/h