Lutz-Jesco MEMDOS SMART LK, Operating Instructions Manual

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Intended use
Foreseeable misuse
10
© Lutz-Jesco GmbH 2014
BA-10103-02-V01
Stepper Motor-driven Diaphragm Dosing Pump MEMDOS SMART LK Operating instructions
suction and discharge valves

Through-suction at installation without back-pressure valves

Damage due to undamped acceleration mass forces

Exceeding the admissible pressure on the suction and discharge sides

Using damaged parts
3.6.3 Incorrect electrical installation

Connecting the mains voltage without a protective earth

Unsecured mains or one that does not conform to standards

Not possible to immediately or easily disconnect the power supply

Wrong connecting cables for mains voltage

Dosing pump accessories connected to wrong sockets

Diaphragm monitoring not connected or defective

Protective earth removed
3.6.4 Incorrect commissioning

Commissioning with damaged plant

Shut-off valves closed at commissioning

Closed suction or pressure line, e.g. due to blockages

Personnel was not informed before commissioning

System was recommissioned after maintenance without all the
protective equipment and fi xtures, etc. being reconnected.

Inadequate protective clothing or none at all
3.6.5 Incorrect operation

Protective equipment not functioning correctly or dismantled

Modifi cation of the dosing pump without authority

Ignoring operational disturbances

Elimination of operational disturbances by personnel without
adequate qualifi cations

Deposits in the dosing head due to inadequate purging, particularly
with suspensions

Bridging the external fuse

Operation made more diffi cult due to inadequate lighting or machines
that are diffi cult to access

Operation not possible due to dirty or illegible display of the dosing
pump

Delivery of dosing media for which the system is not designed

Delivery of particulate or contaminated dosing media

Inadequate protective clothing or none at all
3.6.6 Incorrect maintenance

Carrying out maintenance during ongoing operation

Carrying out work that is not described in the operating instructions

No adequate or regular inspection of correct functioning

No replacement of damaged parts or cables with inadequate
insulation

No securing against reactivation during maintenance work

Using cleaning materials that can cause reactions with the dosing
media

Inadequate cleaning of the system

Unsuitable purging medium

Unsuitable cleaning materials

Cleaning materials left in system sections

Using unsuitable cleaning equipment

Using the wrong spares or lubricants

Contaminating the dosing medium with lubricant

Installing spares without following the instructions in the operating
manual

Blocking venting orifi ces

Pulling off sections of the plant

Contamination at installation without a dirt trap

Mixing up the valves

Mixing up the sensor lines

Not reconnecting all the lines

Damaging or not installing all the seals

Not renewing seals

Not paying attention to safety data sheets

Inadequate protective clothing or none at all
3.6.7 Incorrect decommissioning

Not completely removing the dosing medium

Dismantling lines while the dosing pump is running

Device not disconnected from the power supply

Using the wrong dismantling tools

Inadequate protective clothing or none at all
3.6.8 Incorrect disposal

Incorrect disposal of dosing media, operating resources and other
materials

No labelling of hazardous substances