Neptune NXP-M Operating Instructions Manual page 9

Stepper motor-driven diaphragm dosing pump NXP-M and NXP-P
Foreseeable misuse is assigned to the individual stages of the product
lifetime:
3.6.1 Incorrt assembly
Unstable or unsuitable bracket
n
Dosing pump bolted wrongly or loosely
n
3.6.2 Incorrect hydraulic installation
Suction and pressure lines dimensioned incorrectly
n
Unsuitable connection of the pipes due to wrong material or
n
unsuitable connections.
Suction and pressure lines mixed-up
n
Damage to threads due to them being tightened too much
n
Bending of pipelines
n
No free return flow of the pressure relief valve
n
Excessive demand due to the pressure differences between the
n
suction and discharge valves
Through-suction at installation without back-pressure valves
n
Damage due to undamped acceleration mass forces
n
Exceeding the admissible pressure on the suction and discharge sides
n
Using damaged parts
n
3.6.3 Incorrect electrical installation
Connecting the mains voltage without a protective earth
n
Unsecured mains or one that does not conform to standards
n
Not possible to immediately or easily disconnect the power supply
n
Wrong connecting cables for mains voltage
n
Dosing pump accessories connected to wrong sockets
n
Diaphragm monitoring not connected or defective
n
Protective earth removed
n
3.6.4 Incorrect start-up
Start-up with damaged system
n
Shut-off valves closed at commissioning
n
Closed suction or pressure line, e.g. due to blockages
n
Personnel was not informed before the start-up
n
System was recommissioned after maintenance without all the
n
protective equipment and fixtures, etc. being reconnected
Inadequate protective clothing or none at all
n
3.6.5 Incorrect operation
Protective equipment not functioning correctly or dismantled
n
Modification of the dosing pump without authority
n
Ignoring operational disturbances
n
Elimination of operational disturbances by personnel without
n
adequate qualifications
Deposits in the dosing head due to inadequate purging, particularly
n
with suspensions
Bridging the external fuse
n
Operation made more difficult due to inadequate lighting or machines
n
that are difficult to access
Operation not possible due to dirty or illegible display of the dosing
n
pump
Subject to technical changes.
Delivery of dosing media for which the system is not designed
n
Delivery of particulate or contaminated dosing media
n
Inadequate protective clothing or none at all
n
3.6.6 Incorrect maintenance
Carrying out maintenance during ongoing operation
n
Carrying out work that is not described in the operating manual
n
No adequate or regular inspection of correct functioning
n
No replacement of damaged parts or cables with inadequate
n
insulation
No securing against reactivation during maintenance work
n
Using cleaning materials that can cause reactions with the dosing
n
media
Inadequate cleaning of the system
n
Unsuitable purging medium
n
Unsuitable cleaning materials
n
Detergents left in system parts
n
Using unsuitable cleaning equipment
n
Using the wrong spares or lubricants
n
Contaminating the dosing medium with lubricant
n
Installing spare parts without following the instructions in the
n
operating manual
Blocking venting orifices
n
Pulling off sections of the plant
n
Contamination at installation without a dirt trap
n
Mixing up the valves
n
Mixing up the sensor lines
n
Not reconnecting all the lines
n
Damaging or not installing all the seals
n
Not renewing seals
n
Not paying attention to safety data sheets
n
Inadequate protective clothing or none at all
n
3.6.7 Incorrect decommissioning
Not completely removing the dosing medium
n
Dismantling lines while the dosing pump is running
n
Device not disconnected from the power supply
n
Using the wrong dismantling tools
n
Inadequate protective clothing or none at all
n
3.6.8 Incorrect disposal
Incorrect disposal of dosing media, operating resources and other
n
materials
No labelling of hazardous substances
n
Operating instructions
Intended use
9
Foreseeable misuse