Installation And Operating Instructions; General Information; Symbols Used In This Document - Grundfos NK Serie Instrucciones De Instalación Y Funcionamiento

English (GB) Installation and operating instructions
Original installation and operating instructions
These installation and operating instructions
describe ATEX-approved Grundfos NK, NKG pumps
and NK, NKG bare-shaft pumps.
Sections 1-5 provide important information about the
product, information necessary to be able to unpack,
install and start up the product in a safe way.
Sections 6-8 provide important information on
service, fault finding and disposal of the product.
CONTENTS
1. General information
1.1 Symbols used in this document
1.2 Related installation and operating
instructions
2. Product introduction
2.1 NK, NKG bare-shaft pumps
2.2 Intended use
2.3 Pumped liquids
2.4 Explosion protection documentation
2.5 Identification
2.6 ATEX approvals
3. Installation requirements
3.1 Location
3.2 Bypass with pressure relief valve
4. Electrical connection
4.1 Earthing the pump housing
5. Starting up the product
5.1 Before starting an ATEX-approved pump
5.2 Monitoring, circulating liquid and
ventilation
5.3 Barrier or flushing liquid
5.4 Liquid connections of dead-end solutions
5.5 Circulating solution
5.6 Vacuum operation or suction lift
5.7 Checking the direction of rotation
5.8 Monitoring of bearing condition
6. Servicing the product
7. Technical data
7.1 Operating conditions
8. Disposing of the product
Read this document before you install the
product. Installation and operation must
comply with local regulations and accepted
codes of good practice.

1. General information

These supplementary installation and operating
instructions apply to ATEX-approved Grundfos NK,
NKG pumps and NK, NKG bare-shaft pumps. The
pumps comply with ATEX Directive 2014/34/EU.
Page

1.1 Symbols used in this document

5
DANGER
5
Indicates a hazardous situation which, if
not avoided, will result in death or serious
6
personal injury.
6
6
WARNING
6
Indicates a hazardous situation which, if
6
not avoided, could result in death or
6
serious personal injury.
6
7
CAUTION
8
Indicates a hazardous situation which, if
8
not avoided, could result in minor or
8
moderate personal injury.
8
The text accompanying the three hazard symbols
8
DANGER, WARNING and CAUTION is structured in
the following way:
9
9
SIGNAL WORD
Description of hazard
10
Consequence of ignoring the warning.
12
- Action to avoid the hazard.
12
12
A blue or grey circle with a white graphical
12
symbol indicates that an action must be
13
taken.
13
14
A red or grey circle with a diagonal bar,
possibly with a black graphical symbol,
14
indicates that an action must not be taken
14
or must be stopped.
15
If these instructions are not observed, it
may result in malfunction or damage to the
equipment.
Tips and advice that make the work easier.
5