Lutz-Jesco MEMDOS SMART LDX User manual

Original operating instructions
© Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump
MEMDOS SMART LDX/LAX/LPX
Operating instructions
Read the operating manual!
The user is responsible for installation and operation related mistakes!
Dosing
Conveying
Control
Liquids
Gases
Systems

Table of Contents 3
© Lutz-Jesco GmbH 2023
Subject to technical changes.
231011
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
Table of Contents
1 Notes for the Reader ..........................................................4
1.1 General non-discrimination......................................................4
1.2 Explanation of the signal words ................................................4
1.3 Explanation of the warning signs ..............................................4
1.4 Identification of warnings.........................................................4
1.5 Identification of action instructions ...........................................4
2 Safety .................................................................................5
2.1 General warnings.....................................................................5
2.2 Hazards due to non-compliance with the safety instructions .....5
2.3 Working in a safety-conscious manner .....................................6
2.4 Personal protective equipment.................................................6
2.5 Personnel qualification.............................................................6
3 Intended use ......................................................................7
3.1 Notes on product warranty .......................................................7
3.2 Intended purpose.....................................................................7
3.3 Principles ................................................................................7
3.4 Prohibited dosing media...........................................................7
3.5 Foreseeable misuse.................................................................7
4 Product description ...........................................................9
4.1 Properties................................................................................9
4.2 Scope of delivery .....................................................................9
4.3 Structure of the dosing pump ...................................................9
4.4 Function description ..............................................................10
4.5 Rating plate ...........................................................................10
5 Technical data..................................................................12
6 Dimensions ......................................................................13
6.1 MEMDOS SMART LDX/LAX/LPX 2 – 30 (size 1)........................13
6.2 MEMDOS SMART LDX/LAX/LPX 60 – 180 (size 2)....................14
7 Installing the Dosing Pump..............................................15
7.1 Set up information .................................................................15
7.2 Installation on the wall ...........................................................15
8 Hydraulic installations.....................................................16
8.1 Design of the system..............................................................16
8.2 System piping........................................................................16
8.3 Hydraulic connections............................................................16
8.4 Connecting a leakage drain....................................................18
8.5 Connecting dosing head ventilation ........................................18
8.6 Hydraulic accessories ............................................................19
9 Electrical installation.......................................................21
9.1 Principles ..............................................................................21
9.2 Description of connection sockets ..........................................21
10 Control..............................................................................24
10.1 Explanation of the main menu ..............................................24
10.2 Information menu ................................................................24
10.3 Operating mode menu .........................................................26
10.4 Service menu ......................................................................27
10.5 Setup menu.........................................................................27
11 Operation..........................................................................29
11.1 Commissioning the dosing pump..........................................29
11.2 Operating modes .................................................................30
11.3 External On / Off via Release input ........................................33
11.4 Leakage ..............................................................................34
11.5 Outputs ...............................................................................34
11.6 Level ...................................................................................34
11.7 Activating the password protection.......................................35
11.8 Decommissioning the dosing pump......................................35
11.9 Shutting down in an emergency ...........................................35
11.10 Storage .............................................................................35
11.11 Transportation....................................................................35
11.12 Disposal of old equipment..................................................36
12 Maintenance ....................................................................37
12.1 Maintenance intervals..........................................................37
12.2 Tighten up dosing head bolts................................................37
12.3 Change the diaphragm.........................................................38
12.4 Clean suction and pressure valves........................................38
13 Troubleshooting ...............................................................39
13.1 Dosing pump not delivering or output too low .......................39
13.2 Dosing pump does not prime................................................39
13.3 Delivery rate varies ..............................................................40
13.4 Dosing pump delivery rate too high.......................................40
13.5 Diaphragm is torn or tears too often......................................40
14 Spare parts.......................................................................41
14.1 Spare parts size 1 ................................................................41
15 Delivery characteristic curves.........................................42
16 EU Declaration of Conformity...........................................43
17 Decontamination declaration ..........................................44
18 Warranty claim.................................................................45
19 Index.................................................................................46

Notes for the Reader
4© Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
1 Notes for the Reader
These Operating instructions contain information and behaviour rules for
safe and designated operation of the dosing pump
MEMDOS SMART LDX/LAX/LPX.
Observe the following principles:
nRead the entire operating manual prior to starting-up the device.
nEnsure that everyone who works with or on the dosing pump has read
the operating instructions and follows them.
nKeep the operating instructions for the entire service life of the dosing
pump.
nPass on the operating instructions to any subsequent owner of the
dosing pump.
1.1 General non-discrimination
This operating manual uses only the masculine gender in cases in which
the rules of grammar would allow for gender allocation. This approach
serves the purpose of legibility. Readers of all genders are always ad-
dressed equally.
1.2 Explanation of the signal words
Different signal words in combination with warning signs are used in this
operating manual. Signal words illustrate the gravity of possible injuries if
the risk is ignored:
Signal word Meaning
DANGER
Refers to imminent danger. Ignoring this sign may
lead to death or the most serious injuries.
WARNING
Refers to a potentially hazardous situation.
Failure to follow this instruction may lead to death
or severe injuries.
CAUTION
Refers to a potentially hazardous situation.
Failure to follow this instruction may lead to
minor injury or damage to property.
PLEASE NOTE
Refers to a danger which, if ignored, may lead to
risk to the machine and its function.
Tab. 1: Explanation of the signal words
1.3 Explanation of the warning signs
Warning signs represent the type and source of a danger:
Warning sign Type of danger
Danger point
Danger from electrical voltage
Danger from corrosive substances
Danger from potentially-explosive substances
Danger from automatic startup
Danger of damage to machine or functional
influences
Tab. 2: Explanation of the warning signs
1.4 Identification of warnings
Warnings are intended to help you recognise risks and avoid negative
consequences.
This is how warnings are identified:
Warning sign SIGNAL WORD
Description of danger.
Consequences if ignored.
ðThe arrow signals a safety precaution to be taken to eliminate the
danger.
1.5 Identification of action instructions
This is how pre-conditions for action are identified:
üPre-condition for action which must be met before taking action.
@A resource such as a tool or auxiliary materials required to perform
the operating instructions.
This is how instructions for action are identified:
èSeparate step with no follow-up action.
1. First step in a series of steps.
2. Second step in a series of steps.
4Result of the above action.
üAction completed, aim achieved.

Safety 5
© Lutz-Jesco GmbH 2023
Subject to technical changes.
231011
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
2 Safety
2.1 General warnings
The following warnings are intended to help you to eliminate the dangers
that can arise while handling the dosing pump. Risk prevention measures
always apply regardless of any specific action.
Safety instructions warning against risks arising from specific activities
or situations can be found in the respective sub-chapters.
DANGER
Mortal danger from electric shock!
Wrongly connected or located cables or damaged ones can injure you.
ðConnect the device only to a SCHUKO socket outlet protected by a
ground fault circuit interrupter (GFCI).
ðReplace damaged cables without delay.
ðDo not use extension cables.
ðDo not bury cables.
ðSecure cables to avoid being damaged by other equipment.
DANGER
Danger to life through explosions!
The use of dosing pumps without ATEX certification in a potentially ex-
plosive atmospheres can result in potentially-fatal explosions.
ðNever use the dosing pump in potentially explosive areas.
WARNING
Danger from unsuitable materials
The materials of the dosing pump and hydraulic parts of the system
must be suitable for the dosing medium that is used. Should this not be
the case, the dosing media may leak.
ðMake sure that the materials you are using are suitable for the dos-
ing medium.
ðMake sure that the lubricants, adhesives,sealants, etc.that you use
are suitable for the dosing medium.
WARNING
Caustic burns or other burns through dosing media!
While working on the dosing head, valves and connections, you may
come into contact with dosing media.
ðUse sufficient personal protective equipment.
ðRinse the dosing pump with a liquid (e.g.water) which does not pose
any risk. Ensure that the liquid is compatible with the dosing medi-
um.
ðRelease pressure in hydraulic parts.
ðNever look into open ends of plugged pipelines and valves.
WARNING
Danger of automatic start up!
After connecting the mains supply, residual dosing media in the dosing
head can spray out.
ðBefore connecting the mains supply, connect the dosing lines.
ðCheck that all the screw connections have been tightened correctly
and are leak-proof.
CAUTION
Danger when changing the dosing medium!
Changing the dosing media can provoke unexpected reactions, dam-
age to property and injury.
ðClean the dosing pump and the system parts in contact with the
media thoroughly before changing the dosing medium.
CAUTION
Increased risk of accidents due to insufficient qualifica-
tion of personnel!
Dosing pumps and their accessories may only be installed, operated
and maintained by personnel with sufficient qualifications. Insufficient
qualification will increase the risk of accidents.
ðEnsure that all action is taken only by personnel with sufficient and
corresponding qualifications.
ðPrevent access to the system for unauthorised persons.
2.2 Hazards due to non-compliance with the safety
instructions
Failure to follow the safety instructions may endanger not only persons,
but also the environment and the device.

Safety
6© Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
The specific consequences can be:
nFailure of vital functions of the dosing pump and the system
nFailure of required maintenance and repair methods
nDanger for individuals through dangerous dosing media
nDanger to the environment caused by substances leaking from the
system
2.3 Working in a safety-conscious manner
Besides the safety instructions specified in this operating manual, further
safety rules apply and must be followed:
nAccident prevention regulations
nSafety and operating provisions
nSafety provisions for handling dangerous substances (mostly the
safety data sheets to dosing media)
nEnvironmental protection provisions
nApplicable standards and legislation
2.4 Personal protective equipment
Based on the degree of risk posed by the dosing medium and the type of
work you are carrying out, you must use corresponding protective equip-
ment. Read the Accident Prevention Regulations and the Safety Data
Sheets to the dosing media find out what protective equipment you need.
You will require the minimum of the following personal protective equip-
ment:
Personal protective equipment required
Protective goggles
Protective clothing
Protective gloves
Tab. 3: Personal protective equipment required
Wear the following personal protective equipment when performing the
following tasks:
nCommissioning
nWorking on the dosing pump while running
nShut-down
nMaintenance work
nDisposal
2.5 Personnel qualification
Any personnel who work on the dosing pump must have appropriate spe-
cial knowledge and skills.
Anybody who works on the dosing pump must meet the conditions below:
nAttendance at all the training courses offered by the owner
nPersonal suitability for the respective activity
nSufficient qualification for the respective activity
nTraining in handling of the dosing pump
nKnowledge of safety equipment and the way this equipment functions
nKnowledge of this operating manual, particularly of safety instructions
and sections relevant for the activity
nKnowledge of fundamental regulations regarding health and safety
and accident prevention
All persons must generally have the following minimum qualification:
nTraining as specialists to carry out work on the dosing pump unsuper-
vised
nSufficient training that they can work on the dosing pump under the
supervision and guidance of a trained specialist.
These operating instructions differentiate between these user groups:
2.5.1 Specialist staff
Thanks to their professional training, knowledge, experience and knowl-
edge of the relevant specifications, specialist staff are able to perform the
job allocated to them and recognise and/or eliminate any possible dan-
gers by themselves.
2.5.2 Trained persons
Trained persons have received training from the operator about the tasks
they are to perform and about the dangers stemming from improper be-
haviour.
In the table below, you can check what personnel qualifications are re-
quired for the respective tasks. Only people with appropriate qualifica-
tions are allowed to perform these tasks!
Qualification Activities
Specialist staff nAssembly
nHydraulic installations
nElectrical installation
nMaintenance
nRepairs
nCommissioning
nTaking out of operation
nDisposal
nFault rectification
Trained persons nStorage
nTransportation
nControl
nFault rectification
Tab. 4: Personnel qualification

Intended use 7
© Lutz-Jesco GmbH 2023
Subject to technical changes.
231011
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
3 Intended use
3.1 Notes on product warranty
Any non-designated use of the product can compromise its function or
intended protection. This leads to invalidation of any warranty claims!
Please note that liability is on the side of the user in the following cases:
nThe dosing pump is operated in a manner which is not consistent with
these operating instructions, particularly safety instructions, handling
instructions and the section "Intended Use".
nif people operate the product who are not adequately qualified to carry
out their respective activities.
nno original spare parts or accessories of Lutz-Jesco GmbH are used.
nUnauthorised changes are made to the device.
nThe user uses different dosing media than those indicated in the or-
der.
nThe user does not use dosing media under the conditions agreed with
the manufacturer such as modified concentration, density, tempera-
ture, contamination, etc.
3.2 Intended purpose
The dosing pump MEMDOS SMART LDX/LAX/LPX is intended for the fol-
lowing purpose: the conveying and dosing of liquids.
3.3 Principles
nBefore delivery, the manufacturer inspected the dosing pump and op-
erated it under specific conditions (with a specific dosing medium
with a specific density and temperature, with specific pipe dimen-
sions, etc.) Since these conditions vary at every installation location,
you must calibrate the dosing pump after delivery. For information on
the calibration procedure, refer to section 11.1.2 “Calibrating the dos-
ing pump” on page30.
nComply with the information regarding the operating and environmen-
tal conditions (see chapter 5 “Technical data” on page12).
nAny restrictions regarding the viscosity, temperature and density of
dosing media must be followed. You must only use dosing media at
temperatures above freezing point or below the boiling point of the re-
spective medium.
nThe materials of the dosing pump and hydraulic parts of the system
must be suitable for the dosing medium that is used. In this connec-
tion, note that the resistance of these components can change in de-
pendence on the temperature of the media and the operating pres-
sure.
i
Information on the suitability of materials combined with
different dosing media can be found in the Compatibility Chart
of Lutz-Jesco GmbH. The information in this resistance list is
based on information from the material manufacturers and on
expertise obtained by Lutz-Jesco from handling the materials.
As the durability of the materials depends on many factors,
this list only constitutes initial guidance on selecting material.
In all cases, test the equipment with the chemicals you use
under operating conditions.
nThe dosing pump is not intended for outdoor use unless appropriate
protective measures have been taken.
nAvoid leaks of liquids and dust into the casing and avoid direct expo-
sure to sunlight.
nYou must never operate dosing pumps in a potentially explosive at-
mosphere if they do not have corresponding nameplates or an appro-
priate EC Declaration of Conformity for potentially explosive atmos-
pheres.
3.4 Prohibited dosing media
The dosing pump must not be used for these media and substances:
nGaseous media
nRadioactive media
nSolid substances
nCombustible media
nAll other media that are not suitable for delivery using this dosing
pump
3.5 Foreseeable misuse
Below, there is information about the applications of the dosing pump or
associated equipment that are not considered to be intended use. This
section is intended to allow you to detect possible misuse in advance and
to avoid it.

Intended use
8© Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
Foreseeable misuse is assigned to the individual stages of the product
lifetime:
3.5.1 Incorrect assembly
nUnstable or unsuitable bracket
nDosing pump bolted wrongly or loosely
3.5.2 Incorrect hydraulic installation
nSuction and pressure lines dimensioned incorrectly
nUnsuitable connection of the pipes due to wrong material or unsuita-
ble connections
n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 suc-
tion and pressure valves
n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
3.5.3 Incorrect electrical installation
n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
3.5.4 Incorrect start-up
n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 pro-
tective equipment and fixtures, etc. being reconnected.
nInadequate protective clothing or none at all
3.5.5 Incorrect operation
n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 ade-
quate qualifications
nDeposits in the dosing head due to inadequate purging, particularly
with suspensions
nBridging the external fuse
nOperation made more difficult due to inadequate lighting or machines
that are difficult to access
nOperation not possible due to dirty or illegible display of the dosing
pump
n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
3.5.6 Incorrect maintenance
n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 insula-
tion
nNo securing against reactivation during maintenance work
nUsing cleaning materials that can cause reactions with the dosing
media
n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 operat-
ing manual
n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
3.5.7 Incorrect decommissioning
n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
3.5.8 Incorrect disposal
nIncorrect disposal of dosing media, operating resources and other
materials
nNo labelling of hazardous substances

Product description 9
© Lutz-Jesco GmbH 2023
Subject to technical changes.
231011
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
4 Product description
4.1 Properties
The MEMDOS SMART LDX/LAX/LPX is a stepper motor-driven diaphragm
dosing pump that is used when precise dosing results are required.
They are characterized by the following properties:
nSize 1: Output range from 2.6 – 30.7 l/h, up to 20 bar
nSize 2: Output range from 58.5 – 182 l/h, up to 10 bar
nPower supply 110 – 250 V, 50/60 Hz, IP65, 25 – 70 W
nMicroprocessor-controlled drive
nMaterial finishes PVC, PP, PVDF and stainless steel
n3.5" touchscreen with multilingual menu
nDisplay removable (optional)
nDelivery rate precisely adjustable via display
nSupply amount displayed in various units
Also with MEMDOS SMART LPX:
nTwo alarm relay outputs
nDiaphragm failure input for leak monitoring
nFLOWCON input
nDiaphragm replacement programme
nThree slow-motion modes
nVenting function
nStorage of messages
nSoftware backup with four memory locations
nEthernet interface (optional)
4.2 Scope of delivery
Please compare the delivery note with the scope of delivery. The follow-
ing items are part of the scope of delivery:
nMEMDOS SMART LAX, LDX or LPX dosing pump
nOne set each of hose clamping connections for the suction and dis-
charge sides for hoses with diameters of 4/6 mm, 6/9 mm and 6/12
mm (made of PVC, PP and PVDF)
nCovering caps electrical connections:
3 for MEMDOS SMART LDX or LAX
6 for MEMDOS SMART LPX
nMains cable
nOperating instructions
nInspection report and test certificate (optional)
nAccessory kit (optional)
4.3 Structure of the dosing pump
4.3.1 General Overview
1
3
2
Fig. 1: Dosing pump overview MEMDOS SMART LDX/LAX/LPX
No. Description
1Dosing head
2Drive unit
3Control box
Tab. 5: Designation of components
4.3.2 Dosing head
10101141_2
Bild BA 4.3.2 Dosierkopf
MEMDOS SMART LP 30
1
4
3
2
Fig. 2: Dosing head
No. Description
1Valve and connection on the discharge side
2Integrated dosing head ventilation (only MEMDOS SMART LDX/
LAX/LPX 2, 5 and 10 with plastic dosing head)
3Arrow indicating the direction of throughflow of the dosing
medium (plastic version only)
4Valve and connection on the suction side
Tab. 6: Designation of components

Product description
10 © Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
4.3.3 Control elements
10101141_3
Bild BA 4.3.3 Steuerungselemente
MEMDOS SMART LP 30
④
①
②
③
Fig. 3: Controller of dosing pump MEMDOS SMART LDX/LAX/LPX
No. Description
1Touch display
2Connection ports
3Mains cable for power supply
4Display cable (optional)
Tab. 7: Designation of components
4.4 Function description
Dosing pumps are positive displacement pumps. They are used if pre-
cisely defined delivery of a medium is necessary. A constant volume per
stroke or time is delivered.
The system delivers or meters the dosing medium by means of a repeat-
ed sequence of suction strokes followed by pressure strokes. This results
in a low-pulsation flow.
If the dosing pump is in the suction stroke phase, the diaphragm is pulled
into the rear final position. Due to the resulting vacuum in the dosing
head, the pressure valve closes, the suction valve opens and dosing me-
dium flows from the suction line into the dosing head.
If the dosing pump is in the pressure stroke phase, the diaphragm is
moved into the front final position. Due to the pressure in the dosing head,
the suction valve closes and the dosing medium flows through the pres-
sure valve from the dosing head into the pressurised pipe.
4.5 Rating plate
There is information on the equipment about safety or the product's way
of functioning. The information must stay legible for the duration of the
service life of the product.
Material:
Max. XXX l/h at XX bar
Max. XXX l/h at XX bar
IP XX, XXX V AC, XXXX Hz, XX kW
XX/XXXX
S/N: XXXXXXXXXX
P/N:
Made in
Germany
*102A12345678*
*12345678012345*
MEMDOS SMART
Lutz-Jesco GmbH 30900 Wedemark
Am Bostelberge 19 Germany
Fig. 4: Rating plate MEMDOS SMART LDX/LAX/LPX
No. Description
1Product, type, nominal size
2Material of the dosing head/seals
3Maximum delivery capacity at average pressure
4Maximum delivery capacity at maximum pressure
5Protection class
6Voltage supply
7Label showing conformity with applicable European directives
8WEEE label
9 Frequency
10 Power consumption
11 Serial number
12 Part number
13 Month/year of manufacture
Tab. 8: Designation of components
13
12
11
2
3
4
1
5
6
7 8 9 10

Product description 11
© Lutz-Jesco GmbH 2023
Subject to technical changes.
231011
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Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
Conveying characteristics
The design of the dosing pump enables it to perform the pressure and
suction stroke at different speeds. For low supply rates, for example, the
dosing pump performs the suction stroke at the maximum speed and ad-
justs the speed of the pressure stroke to match the desired supply rate.
This produces a constant supply stream, which gives you a low-pulsation,
smooth dosing.
In addition, in the operating modes Slow Motion 1,Slow Motion 2
and Slow Motion 3 , it offers the possibility of reducing the suction
speed. This allows more viscous media to be dosed more easily and pre-
cisely.
i
When the slow motion modes are activated, the maximum
delivery rate of the dosing pump is reduced:
Slow Motion 1: Reduction to 75 %
Slow Motion 2: Reduction to 50 %
Slow Motion 3: Redreduction to 25 %
Settings
100 % delivery rate
50 % delivery rate
10 % delivery rate
10 % delivery rate
Slow Motion 1
10 % delivery rate
Slow Motion 2
Time
Pressure stroke
Suction stroke
Time
Time
Time
Time
Fig. 5: Conveying characteristics

Technical data
12 © Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
5 Technical data
Please note that some of this data only represents guide values. The actu-
al capacity of a dosing pump depends on various factors. For approximate
values of the delivery capacity at different pressures, refer to chapter 15
“Delivery characteristic curves” on page42.
Specification and Unit
MEMDOS SMART LDX/LAX/LPX Size
2 5 10 20 30 60 100 180
Delivery capacity at max. backpressure
l/h 2.6 5.6 10.4 19.9 30.7 58.5 101.6 182
ml/stroke 0.29 0.62 1.15 2.21 3.41 6.5 11.29 20.22
Max. delivery pressure bar 20 (16*) 16 12 8 6 10 7 4
Delivery capacity at average backpressure
l/h 3 6.4 11 20.9 31.6 65 112.7 191
ml/stroke 0.33 0.71 1.22 2.32 3.51 7.22 12.52 21.22
Average delivery pressure bar 10 8 6 4 3 5 4 2
Max. stroke frequency rpm 150
Suction lift for non-gassing media mWS 3 5
Max. supply pressure mbar 800 500
Diameter of diaphragm mm 33 39 54 68 90
Nominal valve width DN3**/
DN4 DN4 DN6 DN10
Voltage supply 100 – 250 V, 50/60 Hz
Electrical cable m1.8 m (with mains plug)
Power consumption W 25 50 70
Protection class IP65 (with covering caps on the connections
or connected signal lines)
Insulation class F
Materials PVC, PP, PVDF and 1.4571
Weight
PVC, PP, PVDF kg 4 approx. 8 approx. 9 approx.
1.4571 kg 5 approx. 10 approx. 14 approx.
Approved ambient
temperature
PVC °C 5 – 40***
PP, PVDF, stainless steel (1.4571) °C 5 – 45***
Max. temperature
of the medium
PVC °C 0 – 35
PP, PVDF °C 0 – 60
Stainless steel (1.4571) °C 0 – 80
Relative humidity %max. 90
Max. sound pressure level dB(A) 51 – 56
Viscosity limits mPa∙s 300****/1000*****
*With a PVC design
** DN3 double ball valves only
*** Use of the dosing pump at ambient temperatures below 5 °C must be checked individually. In such cases, please contact the manufacturer.
**** With a viscosity of ~300 mPa∙s and above, you must use spring-loaded valves.
***** If the viscosity is above 1000 mPa∙s, this must be checked individually.
Tab. 9: Technical data

Dimensions 13
© Lutz-Jesco GmbH 2023
Subject to technical changes.
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Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
6 Dimensions
All dimensions in mm
6.1 MEMDOS SMART LDX/LAX/LPX 2 – 30 (size 1)
290
280
~97
L120
~86
~207
131 115
122
Ø7
Ø80
Fig. 6: Dimensioned drawing MEMDOS SMART LDX/LAX/LPX 2, 5 and 10 PVC, PP and PVDF
~205
270
~100
122
120
L
~84
131 115
Ø80
Ø7
L
Fig. 7: Dimensioned drawing MEMDOS SMART LDX/LAX/LPX 2, 5 and 10 stainless steel
~102
280
Ø7
122
~82
~206
125 L
L
Ø84
131
115
Fig. 8: Dimensioned drawing MEMDOS SMART LDX/LAX/LPX 20 and 30 PVC, PP, PVDF and stainless steel

Dimensions
14 © Lutz-Jesco GmbH 2023
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Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
Hose clamp connection Material Scale Nominal valve width L
LDX/LAX/LPX 2, 5, 10
PVC/PP/PVDF 4/6 mm DN3 (only with LDX/LAX/LPX 2)/DN4 31
Stainless steel 4/6 mm DN4 50
LDX/LAX/LPX 20, 30
PVC/PP/PVDF
4/6 mm DN4 31
1/4x3/8" 1/4" 13
6/9 mm DN6 34
6/12 mm DN6 13
Stainless steel (1.4571)/
PVDF
4/6 mm DN4 50
6/9 mm DN6 54
6.2 MEMDOS SMART LDX/LAX/LPX 60 – 180 (size 2)
380
250
148
Ø124
L
~315
~65
L
170
165
Ø9
Fig. 9: Dimensioned drawing MEMDOS SMART LDX/LAX/LPX 60, 120 and 180
Hose clamp connection Material Scale Nominal width L
LDX/LAX/LPX 60
PVC/PP/PVDF
6/9 mm DN6 34
6/12 mm DN6 13
1.4571/PVDF 6/9 mm DN6 54
LDX/LAX/LPX 100, 180
PVC/PP/PVDF 13/20 mm DN10 34
1.4571/PVDF G3/8 DN10 34

Installing the Dosing Pump 15
© Lutz-Jesco GmbH 2023
Subject to technical changes.
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Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
7 Installing the Dosing Pump
DANGER
Mortal danger from electric shock!
Electrically conductive liquid can enter pump housings, cable screw
connections and mains connectors.
ðMake sure that all protective measures comply at least with the re-
quirements of protection class IP65.
ðAlways set up the dosing pump such that water cannot enter the
housing.
CAUTION
Danger of personal injury and material damage!
A dosing pump that is difficult to access represents a danger due to
incorrect operation and faulty maintenance.
ðInstall the dosing pump such that it is accessible at all times.
7.1 Set up information
When installing, follow the basic principles below:
nThe valves must be vertical: Pressure valve at top, suction valve at
bottom. in this connection, pay attention to the arrow on the dosing
head. The dosing head must be aligned such that the arrow points
vertically upwards.
nYou should install the dosing pump at a convenient height for opera-
tion.
nIt must not be installed under the ceiling.
nThe frame of foundation for fixing the dosing pump must not be sub-
jected to jolts. The pump must be vibration-free and stable.
nThere must be enough free space in the area of the dosing head and
the suction and pressure valves for these parts to be easily disman-
tled if required. The entire space requirement for installation and
maintenance is approximately 1 m².
nThe distance from the sides of the dosing pump to the wall or other
dosing pumps or equipment must be at least 3 cm. There must be a
guaranteed flow of circulating air.
nThe maximum ambient temperature must be complied with, see
chapter 5 “Technical data” on page 12. If necessary, radiant heat
from surrounding equipment must be screened.
nAvoid exposure to direct sunlight.
nThe dosing pump is not intended for use out of doors unless appropri-
ate protective measures have been taken to prevent dust and water
from entering the housing.
nFor the dimensions of the fastening holes, refer to chapter 6 “Dimen-
sions” on page13.
nThe tightening torque for the fastening bolts is 1.5 – 2 Nm.
7.2 Installation on the wall
The stepper motor diaphragm metering pump has a removable foot that
is mounted to and dismounted from the pump without tools. It can be re-
moved by pressing down on the tab and at the same time pushing your
foot away from the dosing pump. The foot can be attached to the lower
part as well as to the sides of the dosing pump.
10101141_4
Bild BA 7.2.2 Montage an der Wand
MEMDOS SMART LP 30
10101141_4
Bild BA 7.2.2 Montage an der Wand
MEMDOS SMART LP 30
10101141_4
Bild BA 7.2.2 Montage an der Wand
MEMDOS SMART LP 30
Fig. 10: Mounting stand laterally and display frontally

Hydraulic installations
16 © Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
8 Hydraulic installations
In this chapter, you will find information about the hydraulic parts of a
system that you should install or that can install additionally. In many cas-
es, you must install hydraulic accessories to be able to use all the func-
tions that the dosing pump offers, to guarantee functional safety or to
achieve a high level of dosing precision.
WARNING
Caustic burns or other burns through dosing media!
A diaphragm rupture, blocked pressure lines or the use of material not
suitable for the dosing medium can result in the discharge of dosing
medium. Depending on the type and hazardousness of the dosing me-
dium, this can result in injury.
ðWear the recommended personal protective equipment.
ðMake sure that the materials you are using are suitable for the dos-
ing medium.
ðMake sure that the lubricants, adhesives,sealants, etc.that you use
are suitable for the dosing medium.
ðInstall a leakage drain.
ðInstall pressure relief valves.
CAUTION
Danger of personal injury and material damage!
High peak pressures can lead to piping vibrating and cause them to
snap. This can result in injury from piping or escaping dosing media.
ðInstall pulsation dampeners.
PLEASE NOTE
Damage to drives due to overloading
The pressure on the pressure side must be higher than on the suction
side in order to avoid over-delivery.This could otherwise cause uncon-
trolled dosing processes and damage to the pipelines and the dosing
pump.
ðEnsure that the pressure on the discharge side is at least 1 bar than
on the suction side.
PLEASE NOTE
Locking of threads
Stainless steel and plastic parts (particularly those made of PVC) that
are bolted together in a detachable connection (e.g. the dosing head
and the valves) can lock. This makes them difficult to release.
ðBefore bolting, grease the corresponding parts with a lubricant (e.g.
PTFE spray). Ensure that the lubricant is compatible with the dosing
medium.
8.1 Design of the system
nThe dosing pump s technical data must be taken into account and the
plant s layout must be set up appropriately (e.g. pressure loss when
rating the lines with regard to their nominal diameter and length).
nThe entire system and its integrated dosing pump must be designed
in such a way that an escaping dosing medium (due to the failure of
wearing parts such as the diaphragm, or burst hoses) does not lead to
permanent damage to system parts or the premises.
nThe leakage opening of the dosing head must be visible so that you
can detect a diaphragm rupture. It must be possible for the outflow
from the leakage drain to be on a free downwards gradient.
nIf you use hazardous dosing media, the installation must be designed
such that no disproportionately high consequential damages arise
due to dosing media escaping.
nTo avoid dosing errors after the end of the process, the dosing pump
must be locked hydraulically.
nTo allow you to easily inspect the pressure conditions in the system,
you should provide connections for pressure gauges close to the suc-
tion and pressure valves.
8.2 System piping
nThe system piping must not exert any force on the connections and
valves of the dosing pump.
nThis means that steel piping should be connected to the dosing pump
by means of flexible pipe sections.
nThe nominal diameters of the pipework and the installed fittings
should be rated the same as or greater than the nominal diameters of
the dosing pump's suction and pressure valves.
nThe suction line should be kept as short as possible.
nYou should avoid intertwined hoses.
nAvoid loops, since air bubbles can collect.
8.3 Hydraulic connections
8.3.1 Connecting hose clamp connection
Choose the hose connection according to the condition of the hose (mate-
rial, inner diameter, wall thickness) in order to ensure maximum pressure
resistance.

Hydraulic installations 17
© Lutz-Jesco GmbH 2023
Subject to technical changes.
231011
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Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
8.3.1.1 Size 4/6 and 6/9
①
②
③
④
e
①
②
③
④
e
4/6 6/9
Fig. 11: Hose clips 4/6 and 6/9 (internal and external diameters in mm)
Perform the following working steps:
1. Cut the hose (1) to the appropriate length neatly and at an exact right
angle.
2. Place a gasket that is suitable for the dosing medium between the
connection (5) and the valve.
3. Screw the connecting piece to the dosing pump's valve using the un-
ion nut (2).
4. Thread the union nut (3) and the clamping ring (4) onto the hose.
5. Plug the hose all the way in to the grommet of connection piece.
6. Push the clamping ring onto the grommet of connection piece and
screw it with the union nut.
7. Carry out the same procedure with the connection to the dosing
pump's other valve.
üHose clamp connection connected.
8.3.1.2 Size 6/12
①
②
③
④
Fig. 12: Hose clip 6/12 (internal and external diameters in mm)
Size 6/12 hose clips only have a union nut. It clamps the hose onto the
grommet of the connection piece and at the same time fastens on the
dosing pump's valve.
Perform the following working steps:
1. Cut the hose (1) to the appropriate length neatly and at an exact right
angle.
2. Place a gasket that is suitable for the dosing medium between the
connection (4) and the valve.
3. Push the union nut (2) and the cutting ring (3) over the hose.
4. Press the end of the hose onto the grommet of connection piece. You
can do this more easily by moistening the end of the hose on the in-
side or applying some lubricant to the grommet in the cone area. You
should push at least two thirds of the hose onto the grommet of the
connection piece.
5. Push the cutting ring over the hose into the cone area on the grom-
met of connection piece.
6. Screw the union nut onto the valve of the dosing pump.
üHose clamp connection connected.

Hydraulic installations
18 © Lutz-Jesco GmbH 2023
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Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
8.3.2 Connecting cemented connection
①
②
Fig. 13: Cemented connection
Perform the following working steps:
1. Cut the PVC tube to length.
2. Push the union nut (1) onto the tube.
3. Stick the bonded coupling sleeve (2) to the tube (follow the instruc-
tions of the adhesive manufacturer).
4. Screw the union nut onto the valve of the dosing pump. Use a gasket
that is suitable for the dosing medium.
üCemented connection connected.
8.3.3 Connecting threaded connection
①
②
Fig. 14: Threaded connection
Perform the following working steps:
1. Cut the tube to length.
2. Cut the thread (2) onto the end of the tube.
3. Push the union nut (1) onto the tube.
4. Seal the thread. When choosing your sealing material, take into ac-
count its resistance to material, temperature and pressure.
5. Screw the union nut onto the valve of the dosing pump. Use a gasket
that is suitable for the dosing medium.
üThreaded connection connected.
i
Under normal conditions, you only need to screw the hydraulic
connections finger-tight. However, due to the material settling,
the pre-tension of the screw connection can slacken. This
means that you must re-tighten the screw connection before
carrying out commissioning.
8.4 Connecting a leakage drain
Lutz-Jesco GmbH dosing pumps are produced to the highest of quality
standards with a long service life. However, some parts are subject to op-
erational wear. This is the case particularly with the diaphragms that are
continuously subjected to forces during the suction and discharge
strokes and to the effects of the dosing medium.
If a diaphragm ruptures, the dosing medium starts to leak.This leakage is
drained via the leakage opening. On the flange of the dosing head, there
are three openings for this purpose. Depending on the alignment of the
dosing pump, the leakage is drained via the downward opening.
10101169_3
Bild BA 8.5 Leckageableitung anschließen
Fig. 15: Openings of the leakage drain
PLEASE NOTE
Damage to drives due to effervescent media
If a hose is connected to the leakage drain and it is routed back into the
dosing tank, effervescent media can enter the drive and damage it.
ðCollect the leakage in a collecting pan.
ðAs an alternative, you can route the leakage back to the dosing tank
using a funnel.You should install the funnel at an adequate distance
from the leakage opening.
8.5 Connecting dosing head ventilation
The dosing heads of the MEMDOS SMART LDX/LAX/LPX 2, 5 and 10 have
an integrated dosing head venting unit (except for dosing heads made of
stainless steel).

Hydraulic installations 19
© Lutz-Jesco GmbH 2023
Subject to technical changes.
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BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
For the procedure when venting, refer to chapter 11.1.1 “Venting the dos-
ing pump” on page29.
10101169_2
Bild BA 8.6 und 11.1.1 Dosierkopf entlüften
MEMDOS SMART LP 2
Fig. 16: Dosing head ventilation with hose connection
Perform the following working steps:
1. Connect a 4/6 hose to the dosing head venting facility.
2. Route the other end of the hose into the dosing tank or a collecting
tank.
üDosing head ventilation connected.
8.6 Hydraulic accessories
The following chapter is intended to give you an overview of installation
options.
Please note that these operating instructions are no substitute for the in-
structions supplied with the accessories in each case. The corresponding
documentation supplied with the product applies to safety information
and provides exact instructions on assembly.
8.6.1 Injection nozzle
If the pressure line enters a main line, it is advisable to install an injection
nozzle.
Injection nozzles have three main functions:
nDosing the medium into a main line
nPreventing flowback into the pressure line through a non-return valve
Notes on assembly:
nDouble-ball injection nozzles must be installed into the main line verti-
cally from the bottom. You can install hose and spring-loaded injection
nozzles any way you like.
nWith dosing media that tend to crystallize, it is advisable to carry out
installation into the main line from the bottom. This prevents air bub-
bles from being trapped.
nMany dosing media tend to contaminate the injection nozzles, which
can lead to blockages. In cases like this, it is advisable to install an in-
jection nozzle that is easy to dismantle and block off.
8.6.2 Contact water meter
The contact-type water meter measures the throughflow in a pipe and
sends a pulse to the dosing pump, which then starts dosing. This means
that ideal proportional dosing is also possible with large throughflow fluc-
tuations.
The contact water meter is connected to connection port 2 (see chapter
9.2.2 “Connection socket 2” on page22).
8.6.3 Pressure-relief valve
Pressure relief valves have an important safety function for protecting the
dosing pump and the associated pipes and fittings. The dosing pump can
generate a pressure that is many times the rated one. A blocked pressure
line can lead to dosing medium escaping.
An improperly high pressure can occur if:
nThe shut-off valves are closed even though the dosing pump is run-
ning
nPipes block
At an appropriate pressure, a pressure relief valve opens a bypass line
and protects the system in this way from damage caused by over-pres-
sure.
Notes on assembly:
nThe line for returning dosing medium from the pressure relief valve
must be routed to the dosing tank or to a collecting pan.
nThe pressure in the dosing tank must not be too high so that it is pos-
sible to accommodate the returned dosing medium.
nAs an alternative, the system can return dosing medium into the suc-
tion line in front of the dosing pump. In this case, there must not be a
non-return valve or a foot valve in the suction line.
nYou should install the pressure relief valve as close as possible to the
dosing head.
8.6.4 Back-pressure valve
Back-pressure valves are required in the following cases:
nThere are considerably fluctuating system pressures
nThe pressure on the suction side is higher than on the discharge side
or if you intend to carry out dosing into depressurized lines
In cases like this, if you do not use a back-pressure valve, imprecise dos-
ing results will occur or overloading will result. The back-pressure valve
solves these problems by generating a defined, constant backpressure.
In some circumstances, a back-pressure valve is unnecessary if you use
a hose injection nozzle and if the backpressure that it generates is ade-
quate.
8.6.5 Pulsation dampener
Pulsation dampeners have the following functions:
nDamping pulsating delivery flows for processes that require low-pul-
sation dosing,
nReducing the throughflow resistance with long pipelines
When installed on the suction side:
nDamping of acceleration mass forces and with this reduction of wear

Hydraulic installations
20 © Lutz-Jesco GmbH 2023
BA-10005-02-V01
Stepper motor-driven diaphragm dosing pump MEMDOS SMART LDX/LAX/LPX Operating instructions
on the dosing pump
nPreventing cavitation (pull-off of the liquid column) due to too high ac-
celeration
However, pulsation dampeners also have important safety functions,
since they prevent pressure peaks from arising that lead to piping vibrat-
ing and cause them to snap.
This problem can occur:
nWith the high amplitudes of the vibrations
nWhen using long pipes (the severity of the pulsation increases with
the length of the pipe)
nWhen using rigid piping instead of elastic hoses
Notes on assembly:
nYou should carry out assembly in the direct vicinity of the location
where you want to damp the pressure peaks (directly in front of the
suction valve or directly behind the pressure valve).
nPulsation dampeners should be installed with throttle valves or
back-pressure valves installed directly behind them. By setting the
valves appropriately, you can further-optimise damping of the pulsa-
tions.
nTo prevent unnecessary pipe friction losses, you should lay the con-
necting line straight and in accordance with the rated width of the pul-
sation dampener.
nYou must separately fasten relatively large pulsation dampeners and
ones with hose connections.
nPipelines must not transfer any mechanical tensions onto the pulsa-
tion dampener.
8.6.6 Priming aid
Priming aids are particularly advisable:
nIn the case of dosing pumps with small volumetric displacements per
stroke or with low stroke length settings
nWith high suction hights
nWith highly dense dosing media
nAt priming for the first time due to dry valves and air in the suction line
and the dosing head
nIn dosing systems with frequent downtimes
Further advantages resulting from priming aids:
nPreventing cavitation in the suction line
nGas removal
nOptical dosing control with small amounts
nSmoothing of the suction flow
8.6.7 Level control
Level monitoring of suction-side feeding of the dosing medium to prevent
the tank being sucked dry and to ensure that it can be topped up again in
good time.
8.6.8 Dosing of suspensions
When dosing suspensions, the dosing head must be rinsed regularly to
prevent depositing. To do this, you install a feed line for the rinsing medi-
um (water) in the suction side installation.
8.6.9 Suction pressure regulator
A suction pressure regulator may be necessary if the suction-side instal-
lation of the system demonstrates a varying suction pressure or supply
pressure:
nDosing pumps that are installed above dosing tanks deliver less as the
tank empties, since the suction head increases.
nDosing pumps that are installed below dosing tanks deliver less as the
tank empties, since the positive delivery pressure reduces.
Further problems that can occur:
nGreater wear on the dosing pump, e.g. diaphragm rupture due to the
effects of heavy forces with particularly high tanks and high-density
dosing media.
nIdling of the dosing tank in the case of a diaphragm rupture or pipe
breakage
nImpermissibly high forces in the pump transmission that occur when
dosing pumps receive the dosing medium directly from the pressure
line
nReduced performance or destruction of fittings due to cavitation with
long suction lines
Installing a suction pressure regulator is a remedy for the problems
above. The suction pressure regulator is opened by the dosing pump's
suction pressure. This ensures that no dosing medium can flow if the
dosing pump is not running or no vacuum can be generated following a
pipe fracture.
Notes on assembly:
nWhen using a large suction pressure regulator, you should provide a
pulsation dampener on the suction side.