Jesco MEMDOS E User manual

MEMDOS E/DX
Motor-driven Diaphragm Dosing Pump
Operation manual
Read this operation manual before start-up!
To be retained for future reference.
EN 02
Dosing
Conveying
Control
Liquids
Gases
System
s

List of Contents
1. General and Safety Instructions................................................................................................................................3
2. General .......................................................................................................................................................................7
2.1 Proper use ........................................................................................................................................................ 7
2.2 Structure of the dosing pump............................................................................................................................. 7
3. Function .....................................................................................................................................................................8
4. Dimensional drawings...............................................................................................................................................9
5. Technical data..........................................................................................................................................................11
5.1 Electric motor data .......................................................................................................................................... 13
5.2 Technical data ATE servomotor MEMDOS E (optional)......................................................................................... 14
6. Performance curves.................................................................................................................................................15
7. Installation ...............................................................................................................................................................17
7.1 General information ......................................................................................................................................... 17
7.2 Installation location.......................................................................................................................................... 18
7.3 Drain pipe....................................................................................................................................................... 18
7.4 Electrical connection of the pump..................................................................................................................... 18
7.5 Wiring diagrams for ATE servomotor for stroke length adjustment....................................................................... 21
7.6 Level control ................................................................................................................................................... 22
7.7 Back-pressure and safety valves ...................................................................................................................... 22
7.8 Injection nozzle installation............................................................................................................................... 22
7.9 Installation example......................................................................................................................................... 23
8. Operation..................................................................................................................................................................24
8.1. Stroke length adjustment ................................................................................................................................ 24
8.2 MEMDOS DX operating elements...................................................................................................................... 24
8.3 Switching on/off .............................................................................................................................................. 24
8.4 Operating mode selection ................................................................................................................................ 24
8.5 Alarm.............................................................................................................................................................. 25
8.6 Other settings.................................................................................................................................................. 26
8.7 Factory setting ................................................................................................................................................ 26
8.8 Connections and cable assignments................................................................................................................. 26
9. Start-up....................................................................................................................................................................28
9.1 Start-up of MEMDOS E with ATE servomotor ..................................................................................................... 28
10. Shutdown ...............................................................................................................................................................29
10.1 Disposal of old equipment.............................................................................................................................. 29
Device revision ............................................................................................................................................................29
11. Maintenance ..........................................................................................................................................................30
11.1 Lubrication.................................................................................................................................................... 30
11.2 Maintenance of the bearings......................................................................................................................... 30
11.3 Maintenance of the ATE servomotor (optional) ................................................................................................. 30
11.4 Diaphragm replacement................................................................................................................................. 30
11.5 Valves........................................................................................................................................................... 32
12. Explosion-proof dosing pumps (ATEX) .................................................................................................................36
12.1 General......................................................................................................................................................... 36
12.2 Special conditions.......................................................................................................................................... 36
12.3 Dosing of flammable media............................................................................................................................ 36
13. Troubleshooting .....................................................................................................................................................37
14. Spare parts.............................................................................................................................................................38
15. External vent (optional) .........................................................................................................................................43
Index.............................................................................................................................................................................44
Warranty claim.............................................................................................................................................................46
CE declaration of conformity......................................................................................................................................47
2 | Operation & Maintenance Instructions | List of Contents

1. General and Safety Instructions
1.1 General
This operation manual contains basic instructions to be followed during installation, operation and main-
tenance. It is therefore essential for the assembler and the responsible personnel/operator to read this
operation manual before installation and start-up, and it must remain available at the place of installation at
all times.
Besides the general safety instructions in this "Safety" section, the special safety instructions inserted in the
other sections are also to be followed.
1.2 Identification of safety instructions in this operation manual
Disregarding the safety instructions in this operation manual may cause danger to persons, the environment
and the system. Safety instructions are identified by the following symbols:
DANGER!
Indicates an immediate danger.
Failure to follow this instruction will lead to death or extremely serious injuries.
WARNING!
Indicates a potentially hazardous situation. Failure to follow this instruction can lead to death or extremely
serious injuries.
CAUTION!
Indicates a potentially hazardous situation. Failure to follow this instruction can lead to minor injuries or
damage to property.
ATTENTION! or NOTICE!
Failure to follow these safety instructions may endanger the machine and its functions.
IMPORTANT!
This indicates additional information that makes work easier and ensures trouble-free operation.
Information attached directly to the dosing pump, such as
• cable markings
• markings for fluid connections
must be followed without fail and must remain fully legible at all times.
1.3 Personnel qualifications and training
The personnel employed for operation, maintenance, inspection, and installation must be suitably qualified
for this work. The responsibilities, areas of competence and personnel supervision must be clearly defined
by the operating company. Personnel who do not have the required know-how must be duly trained and
instructed. If necessary, this can also be done by the manufacturer/supplier on behalf of the operating
company. In addition, the operating company must ensure that the personnel are fully familiar with, and
have understood the contents of this operation manual.
1.4 Important safety instructions
When installing and using this electrical device, basic safety precautions should always be followed, includ-
ing the following:
ATTENTION!
Read and follow all instructions! Keep this operation manual for future reference!
WARNING!
To reduce the risk of injury, do not permit children to use this product unless they are closely supervised at
all times.
General and Safety Instructions | Operation & Maintenance Instructions | 3

WARNING!
Risk of electric shock. Connect the device only to a SCHUKO socket outlet protected by a ground fault circuit
interrupter (GFCI). Contact a qualified electrician if you are uncertain whether the socket is protected by a
GFCI.
Do not bury the cable. Fix the cable to minimise possible damage due to lawn mowers, hedge trimmers, and
other equipment.
WARNING!
To reduce the risk of electric shock, replace the cable immediately if damaged.
WARNING!
To reduce the risk of electric shock, do not use an extension cable to connect the device to the power sup-
ply; use an appropriately located outlet socket.
1.5 Hazards due to failure to follow safety instructions
Failure to follow the safety instructions may endanger not only persons, but also the environment and the
device. Failure to follow the safety instructions may invalidate any damage claims.
The following hazards in particular may result:
• failure of major equipment functions
• failure of required maintenance and repair methods
• danger to persons due to electrical, mechanical and chemical effects
• danger to the environment due to leakage of hazardous substances
1.6 Safety-conscious working
The safety instructions contained in this operation manual must be observed. The operating company is
responsible for ensuring compliance with local safety regulations. Faults that may affect safety must be
repaired immediately!
1.7 Safety instructions for the operating company/operator
Leakages of dangerous substances (e.g. aggressive, toxic), for example due to a broken diaphragm, must
be suitably drained away so that they do not cause danger to persons or the environment. Statutory regula-
tions must be observed.
Dangers due to electric current must be prevented (for further details, refer to the VDE1) regulations and
regulations of the local power supply companies).
1) German Association for Electrical, Electronic & Information Technologies
Separate regulations must be observed if the MEMDOS E is operated in areas with a potentially explosive
atmosphere. The operating company must determine the explosion hazard (area classification) and select
the appropriate equipment. Further information can be found in paragraph 7.1 (Installation), paragraph 7.4
(Electrical connection) and section 13 (Explosion-proof dosing pumps).
1.8 Safety instructions for inspection, maintenance and installation work
The operating company must ensure that all maintenance, inspection and installation work is undertaken by
authorised and duly qualified personnel, who have studied this operation manual.
Any work on the machine must only be carried out after it has been brought to a complete stop. Always
follow the procedure specified in the operation manual for shutting down the dosing pump/system.
Dosing pumps or systems which convey hazardous media must be decontaminated.
All safety and protective equipment must be re-attached and activated immediately after the work has been
completed.
4 | Operation & Maintenance Instructions | General and Safety Instructions

CAUTION!
Particular care must be taken when repairing the MEMDOS E if used in areas with a potentially explosive
atmosphere. Due to the risk of sparking, care must be taken to prevent metal parts or tools knocking against
one another. When repairing, it is better to move the dosing pump out of the area with a potentially explosive
atmosphere.
The instructions given in paragraph 7.2 "Installation location" and section 9 "Start-up" must be observed
before start-up.
1.9 Unauthorised modification and production of spare parts
The device may only be modified or converted in consultation with the manufacturer. Use only the manufac-
turer's spare parts and accessories. Otherwise the warranty is invalidated.
1.10 Inadmissible operating practices
Any methods of operation other than those described in section 2 "Proper use" are not permitted, and will
cancel any manufacturer liability under the warranty.
1.11 Dosing of chemicals
CAUTION!
When working on dosing systems, the local accident prevention regulations must be observed and the
specified personal protective equipment must be worn. The following standard protective clothing is recom-
mended, depending on the hazardousness of the metered medium:
Protective clothing Protective gloves Protective goggles
All persons responsible for assembly and maintenance of piping, hoses and accessories should wear this
protective equipment.
Before working on the dosing pump and system, disconnect it from the mains supply and prevent it from
being switched on.
CAUTION!
Any chemical still present in the dosing head may spray out when the power supply is reconnected. This
may lead to chemical or other burns to the face and hands. Dosing lines must always be connected before
switching on again.
The chemical resistance of the construction materials in the pump must be verified before dosing aggres-
sive media!
The pump dosing head and the system connections and lines may be under pressure. Working on the dos-
ing system requires special safety precautions and is allowed only for suitably trained personnel:
CAUTION!
Chemical may spray out. This may lead to chemical or other burns. Always release the pressure before
starting work on the dosing pump.
Before working on the dosing head, valves and connections, flush the dosing pump with a harmless medium
(water in most cases), to avoid unintentional contact with the metered medium.
WARNING!
Never look into the open end of a clogged line or valve. Chemical may flow out unexpectedly and cause
chemical or other burns to face and hands.
Before start-up, all screw connections must be inspected for correct tightness and leak-tightness, and must
be re-tightened using an appropriate tool if necessary.
General and Safety Instructions | Operation & Maintenance Instructions | 5

CAUTION!
If connections at the dosing head are loosened during operation, for venting or other reasons, leaking chem-
ical must be removed properly. This is the only way to avoid health hazards due to chemicals, and chemical
corrosion of the dosing pump. Leaking chemical may also damage the diaphragm at its mounting edge.
ATTENTION!
If changing the chemical, check the materials in the pump and other system parts for chemical resistance. If
there is a danger of chemical reaction between the different media, clean thoroughly beforehand.
IMPORTANT!
To operate the pump, mount the fan cowl in order to ensure sufficient cooling of the motor.
The protection class of the control unit is only ensured if the connection ports are protected by caps or the
standard connectors are inserted.
DANGER!
Fire hazard. Shock wave: parts may fly off and cause fatal injury. MEMDOS DX must never be used in areas
with a potentially explosive atmosphere.
CAUTION!
Under certain operating conditions, the drive motor of the DX version might heat up considerably. This may
cause burns to the hands. To avoid unintentional contact, provide an appropriate safety device.
WARNING!
Lethal voltage!
Adjustment work inside the ATE servomotor (optional for MEMDOS E) must be carried out carefully. Connec-
tions and internal limit switches might be live. Additional limit switches might be live even when the auxiliary
voltage is switched off (ATE servomotor). After installation work on the ATE servomotor, or before start-up,
re-attach the cover.
1.12 Transportation
No special devices are required for transportation of the dosing pumps. However, it is advisable to choose a
transport method appropriate for the weight of the dosing pumps (e.g. transport trolley). If transporting with
the oil drained, the dosing pump should preferably be placed in the horizontal position. Otherwise, stability
must be ensured by screwing it onto the transport frame.
1.13 Scope of delivery
IMPORTANT!
Carefully unpack the dosing pump and any accompanying accessories ordered, so that small parts are not
left inside the packaging. Compare the delivery content with the delivery note immediately. If there are any
discrepancies, find out the cause.
The following are part of the scope of delivery:
• MEMDOS dosing pump
• Suction and discharge side connections
• Gear oil
• 2x cables (for MEMDOS DX)
• Operation manual
• ATE servomotor (optional)
• Separate fan (optional)
6 | Operation & Maintenance Instructions | General and Safety Instructions

2. General
2.1 Proper use
The device is intended for the following purpose only: the conveying and dosing of chemicals.
Operating safety is guaranteed only if the device is used for its intended purpose. Use for any other purpose
is not permitted and will cancel any liability under the warranty. The operating conditions described in sec-
tion 5 "Technical Data" must be observed!
2.2 Structure of the dosing pump
c
a
h
b
di o p q
g
k
n
m
l
f
e
j
aDosing head
bSuction side valve
cDischarge side valve
dDrain pipe
eStroke length adjustment
fStroke length adjustment lock
gMotor terminal box (MEMDOS E power supply)
hOil inlet
iOil outlet
jControl unit (MEMDOS DX)
kOperating panel with display
l"External switch-off" contact
m"Level input" contact
n"External control" contact
oPower supply (MEMDOS DX)
pMotor connection
qWarning alarm relay
General | Operation & Maintenance Instructions | 7

3. Function
Motor-driven diaphragm dosing pumps of the MEMDOS series are used in industry in the process engineer-
ing sector, and in water treatment and wastewater processing.
The MEMDOS E and MEMDOS DX are available in two overall sizes:
• Size 1: max 160 l/h delivery capacity
• Size 2: max 380 l/h delivery capacity
MEMDOS E
The MEMDOS E is used where no control is required for constant dosing. In this case, the power supply is
connected directly to the motor terminal box. To adapt the dosing capacity, either the stroke length can be
adjusted manually from 0 to 100%, or the motor speed can be controlled by means of a separate frequency
converter. The MEMDOS E is optionally available with electric remote adjustment of the stroke length (ATE).
The MEMDOS E can be operated in Zone 1 hazardous areas if the corresponding drive is taken into consid-
eration. Further information can be found in section 12.
MEMDOS DX
The "smart" MEMDOS DX is used where the dosing pump is to be integrated in controls or control circuits.
The MEMDOS DX allows adaptation to a large variety of different control signals and system monitoring
equipment. The signals required for external activation of the dosing pump can be from simple potential-
free closing contacts of water meters or controllers, or analogue 0/4...20 mA signals. For contact actuation
(pulse control), the stroke frequency can be adapted by division or multiplication. For internal operation (own
stroke), the dosing pump can be adjusted continuously between 0 and max. 142 strokes/min, depending on
version.
Principle of operation
aDiaphragm
bDiaphragm rod
cReturn spring for suction stroke
dTappet plate
eDrive eccentric
fStroke limit eccentric
Like the roller bearings, the worm gear set of
the single-speed gear runs in an oil bath. Dosing
takes place when movement of the drive eccentric
ecauses movement of the diaphragm rod b.
The suction stroke is produced by the return
movement due to spring force. Stroke length is
adjusted by limiting the tappet return movement
using a manually adjustable eccentric disc as the
end stop (stroke limiting eccentric f). The adjust-
ment range is from 0 to 100%.
a b c d
e
f
min.
max.
max.
8 | Operation & Maintenance Instructions | Function

4. Dimensional drawings
90
75
31
C
9
130
~ 376
B 97 18
32
70
~ 80 ~ 107
L
A
L
Dimensional drawing MEMDOS E/DX 4..0.156
E/DX A B C Connection L
4...26 118 95 222 6/12 13
50 153 104 234 6/12 13
75, 76 153 104 234 ø 16 internal 17
110...156 246 117 259 ø 16 internal 22
All dimensions in mm
268~
133
177
124250~
130
Dimensional drawing MEMDOS E 4..0.156 ATE
(ATEX Motor: 473.5)
Dimensional drawings | Operation & Maintenance Instructions | 9

B98ca. 36,5
30
40
177
121,5
130

C
D
79 124ca.
L A L
11

Dimensional drawing MEMDOS E/DX 160...380
Type A B C D L* D with ATEX motor
E 160..0.260 278 148 317 469 approx. 22 632
DX 160..0.260 278 148 317 486 approx. 22
E 300...380 318 153.5 320 469 approx. 22 632
DX 300...380 318 153.5 320 486 approx. 22
* Dimension L for glue-in connection, internal ø 20, all dimensions in mm
268~
133
177
124250~
130
Dimensional drawing MEMDOS E 160...380 ATE
10 | Operation & Maintenance Instructions | Dimensional drawings

5. Technical data
MEMDOS E / DX 4..0.156 Size 4 8 15 252) 261) 50 752) 5) 761) 5) 110 1502) 1561)
Capacity at max. pressure 4) l/h 4 7.5 15 25 25 48 72 72 107 160 160
Stroke volume ml/stroke 2.6 8.5 19
Max. pressure bar 10 5 4
Stroke frequency4) rpm 26 48 95 142 142 95 142 142 95 142 142
Diaphragm ø mm 52 64 90
Stroke length mm 6 9
Suction lift mbar 900 800 700
max. inlet pressure mbar 500
max. ambient temperature 3) °C 40
Power output E (3~) W 50 250
Power output DX (1~) W 50 120
Weight
Plastic
E kg 7.4 7.6 10.2
DX kg 8.0 9.2 12.0
Weight
Stainless steel
E kg 8.1 9.5 18.0
DX kg 8.7 11.1 20.0
MEMDOS E / DX 160...380 Size 160 200 2602) 300 3802)
Capacity at max. pressure 4) l/h 170 208 263 292 393
Stroke volume ml/stroke 36.5 51.2 54.5
Max. pressure bar 10 8 6
Stroke frequency4) rpm 71 95 120 95 120
Diaphragm ø mm 120 150
Stroke length mm 10
Suction lift mbar 600 450
max. inlet pressure mbar 500
max. ambient temperature 3) °C 40
Power output E (3~) W 370
Power output DX (1~) W 250
Weight
Plastic
E kg 17.0 19.0
DX kg 24.0 26.0
Weight
Stainless steel
E kg 26.0 32.0
DX kg 33.0 39.0
1) Special sizes for 60 Hz operation. Delivery capacity and stroke frequency data refer to 60 Hz operation.
2) Not suitable for 60 Hz operation.
3) Max. media temperature 40 °C for PVC dosing head, and 60 °C for PP and stainless steel dosing heads
(80 °C for short periods).
Min. media temperature at 0 °C.
4) For 60 Hz operation, values are increased by a factor of 1.2.
5) The pipe size should be no smaller than DN 10, please refer to section 7.1.
Technical data | Operation & Maintenance Instructions | 11

Control unit (MEMDOS DX) Standard version CSA version
Power supply 95 ... 264 V AC, 48 ... 63 Hz
Connection 1.8 m cable,
3-wire, 0.75 mm2
Safety plug
1.8 m cable,
3-wire, 0.75 mm2
UL/CSA plug
Power consumption (without motor) 10 W
ISO class F
Protection class IP 55*
Max. admissible ambient temperature 40 ℃
Digital display 3-digit display for stroke frequency and level status
LEDs for functional display in operation (green)
fault (red)
external control (green)
Plastic film keypad 4 keys for programming and operation
Weight 0.8 kg
Inputs
External switch-off External pump switch-off with potential-free contact (nor-
mally closed, N.C.) provided by operating company
3.5 mm jack socket (M12x1 plug optional)
Level input Connection of accessories (e.g. suction line with level
switch)
5 V DC voltage, pre-alarm and main-alarm,
Connection Contact: normally closed, N.C.
3.5 mm jack socket (M12x1 plug optional)
External control Pulse input or analogue input
RCA socket
(M12x1 plug optional)
3-pin socket
Pulse input potential-free contact (normally closed, N.C.) provided by
operating company
5 V DC voltage
Pulse length min. 30 ms
Multiplication/division of pulses 1 / 2 / 4 / 8 / 16 / 32 / 64
Analogue input 0/4...20 mA signal **
Working resistance: 150 Ohm
Outputs
Warning alarm relay voltage-free changeover contact,
max. 250 V AC, 2.5 A or max. 30 V DC, 2.5 A,
Cable connection
*if connection ports are protected by caps, or standard connectors are inserted.
**1 If several dosing pumps are connected in series with 4... 20 mA control, an additional device (splitter) is necessary.
12 | Operation & Maintenance Instructions | Technical data

5.1 Electric motor data
MEMDOS DX 4...50 75...156 160...380
Standard motor, type AF 63/4B-7R EB20RW71G4 EB20RW71K4
Speed rpm 1360 1390 1650 1410 1680
Voltage V 1~ 230 120 230 120
Nominal current A 0.7 1.15 2.2 3.3 5.1
Power output kW 0.05 0.12 0.25 0.25
Frequency Hz 50 60 50 60
Protection class IP 55
ISO class F
Overheating protection integrated temperature switch
MEMDOS E 4...50 75...156 160...380
Standard motor, type AF 63/4B-7R AF 63/4C-7R K21R7164 KR21R80K4TPM
Speed rpm 1400 1430 1400
Voltage V 3~ 230/400
Nominal current A 0.86/0.5 1.5/0.9 1.75/1.0 2.8/1.6
Power output kW 0.05 0.25 0.37 0.55
Frequency Hz 50
Protection class IP 55
ISO class F
PTC thermistor optional
Explosion-proof motors for MEMDOS E
MEMDOS E 4...156 160...380 4...156 160...380
Type KPER63K4 KPER71G4 F63CTV/a4 F71CTV/b4
Explosion protection increased safety EExeIIT3 EXdellCT4 pressure-resistant enclosure
Speed] rpm 1370 1410 1380
Voltage V 1~ 230/400
Nominal current A 0.83/0.48 1.87/1.08 1.0/0.6 2/1,15
Power output kW 0.12 0.25 0.18 0.37
Frequency Hz 50
Protection class IP 55
ISO class F
PTC thermistor optional
Technical data | Operation & Maintenance Instructions | 13

5.2 Technical data ATE servomotor MEMDOS E (optional)
Reversible servomotor with self-locking step-down gear. Connections via cable glands. Angle of rotation
limited by two internal limit switches.
Servomotor NK 1510 NK 1510-PMR-NK
Part No. 79466 79468 79467 79469
MEMDOS E E4 ... 380
Voltage 230 V AC,
50/60 Hz
115 V AC,
50/60 Hz
230 V AC,
50/60 Hz
115 V AC,
50/60 Hz
Power consumption 7 VA
Regulation
time
50 Hz 45 s
60 Hz 39 s
Regulation bevel 270° ⇔0...100%
Protection class IP 65
Ambient temperature -15 ... +60 ℃
Weight 2.5 kg
Inputs
Control 3-point step control 0(4) ... 20 mA
Working resistance
at 0/4...20 mA
- 250 Ω
Outputs
Position feedback signal for
remote display
0...1000 Ohm, max. 2 W 0(4) ... 20 mA
0(2) ... 10 V
See the enclosed operating instructions for the ATE servomotor for further technical data.
14 | Operation & Maintenance Instructions | Technical data

6. Performance curves
The performance curves refer to water at 20 °C (68 °F) and a suction lift of 0.5 m. The medium (density
and viscosity) and temperature cause the delivery rate to change. Dosing pumps must therefore be gauged
in litres for the application. At 60 Hz operation, values are increased by a factor of 1.2.
E/DX 4
0
1
2
3
4
5
6
012345678910
l/h
E/DX 8
0
2
4
6
8
10
012345678910
l/h
E/DX 15
0
2
4
6
8
10
12
14
16
18
20
012345678910
l/h
E/DX 25/26
0
5
10
15
20
25
30
012345678910
l/h
E/DX 50
0
10
20
30
40
50
60
012345678910
l/h
E/DX 75/76
0
10
20
30
40
50
60
70
80
90
012345678910
l/h
E/DX110
0
20
40
60
80
100
120
140
012345678910
l/h
E/DX150/156
0
20
40
60
80
100
120
140
160
180
200
012345678910
l/h
2 bar
E/DX160
0
20
40
60
80
100
120
140
160
180
200
012345678910
l/h
E/DX200
0
50
100
150
200
250
300
012345678910
l/h
E/DX260
0
50
100
150
200
250
300
350
400
012345678910
l/h
E/DX300
0
50
100
150
200
250
300
350
400
450
500
012345678910
l/h
E/DX380
0
50
100
150
200
250
300
350
400
450
500
012345678910
l/h
1 bar 3 bar
4 bar
2 bar
1 bar
5 bar
1 bar
5 bar
10 bar
1 bar
10 bar
5 bar
1 bar
5 bar
10bar
1 bar
4 bar
8 bar
1 bar
3 bar
6 bar
2bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
Stroke length Stroke length
Stroke length Stroke length
Stroke length Stroke length
Power output data apply to 50 and 60 Hz operation
Power output data apply to 50 and 60 Hz operation
Performance curves | Operation & Maintenance Instructions | 15

E/DX 4
0
1
2
3
4
5
6
012345678910
l/h
E/DX 8
0
2
4
6
8
10
012345678910
l/h
E/DX 15
0
2
4
6
8
10
12
14
16
18
20
012345678910
l/h
E/DX 25/26
0
5
10
15
20
25
30
012345678910
l/h
E/DX 50
0
10
20
30
40
50
60
012345678910
l/h
E/DX 75/76
0
10
20
30
40
50
60
70
80
90
012345678910
l/h
E/DX110
0
20
40
60
80
100
120
140
012345678910
l/h
E/DX150/156
0
20
40
60
80
100
120
140
160
180
200
012345678910
l/h
2 bar
E/DX160
0
20
40
60
80
100
120
140
160
180
200
012345678910
l/h
E/DX200
0
50
100
150
200
250
300
012345678910
l/h
E/DX260
0
50
100
150
200
250
300
350
400
012345678910
l/h
E/DX300
0
50
100
150
200
250
300
350
400
450
500
012345678910
l/h
E/DX380
0
50
100
150
200
250
300
350
400
450
500
012345678910
l/h
1 bar 3 bar
4 bar
2 bar
1 bar
5 bar
1 bar
5 bar
10 bar
1 bar
10 bar
5 bar
1 bar
5 bar
10bar
1 bar
4 bar
8 bar
1 bar
3 bar
6 bar
2bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
2 bar
5 bar
10 bar
Dosing pump for 50 Hz operation only
Stroke length Stroke length
Stroke length Stroke length
Stroke length Stroke length
Stroke length
Power output data apply to 50 and 60 Hz operation
Dosing pump for 50 Hz operation only
16 | Operation & Maintenance Instructions | Performance curves

7. Installation
7.1 General information
Local rules and regulations must be taken into account when selecting a dosing pump for designing a
system, and for installation and operation. This applies to the selection of the appropriate materials for the
dosing pump, the handling of chemicals, and electrical installation.
Before installing the pump in areas with a potentially explosive atmosphere, the dosing pump must be
checked to ensure that it meets the minimum requirements set by the applicable explosion protection
regulations. For this purpose, the data on the dosing pump rating plate must be compared with the local
requirements.
The technical specifications of the dosing pump (section 5) must also be taken into consideration, and the
system designed accordingly (e.g. pressure loss for pipe dimensions i.e. nominal diameter and length).
ATTENTION!
For the MEMDOS E/DX 75 and 76, pipe dimension must be at least DN 10. The DN 6 pipe dimension is
permissible only for short lines (up to 2 m) and low-viscosity media (<50 mPa s) .
The designer and operating company are responsible for ensuring that the whole system, including the
dosing pump, is constructed so that neither system parts nor buildings are damaged in the case of chemical
leakage due to the failure of wear parts (e.g. diaphragm rupture) or burst hoses. If the chemical system
represents a potential source of danger, the installation must be designed so that no unreasonable conse-
quential damage occurs, even if the dosing pump fails. We therefore recommend installing leakage monitors
and collecting pans.
The drain pipe of the dosing head must be visible so that a diaphragm rupture can be detected. Drainage
should be able to flow freely downward through the drain pipe.
To increase dosing accuracy and ensure functional reliability, we recommend installing additional valves
and accessories. These include back-pressure valves, pressure-relief valves, leakage monitors and low level
indicators, as shown in the installation examples.
Always use appropriate tools when installing plastic connecting parts. To avoid damage, never apply exces-
sive force.
IMPORTANT!
Plastic parts (especially PVC parts) can be tightened and loosened more easily by applying lubricant to the
thread beforehand (e.g. silicone grease).
Threaded stainless steel parts (e.g. dosing head and valves) must be lubricated before being assembled
(e.g. with PTFE spray), in order to prevent seizing.
ATTENTION!
Check the lubricant for compatibility with the chemical.
7.1.1 Installation of MEMDOS E with ATE servomotor
When delivered, the ATE servomotor is already connected to the dosing pump and adjusted. When installing,
sufficient installation space of at least 150 mm must be provided in order to allow later maintenance.
The electrical connection of the ATE servomotor must be made according to local regulations and may
only be carried out by qualified technical personnel. The wiring diagrams (section 7.5) show the two basic
connection variants.
Cable type and cross-section must be chosen according to the motor data.
The cable passage through the housing must be made professionally. We recommend using gland con-
nections with strain-relief clamp. The required protection class must be ensured by professional-standard
installation of the electrical connections.
Installation | Operation & Maintenance Instructions | 17

ATTENTION!
Note that the ATE servomotor can only be actuated when the main drive motor of the dosing pump is run-
ning. This means that the ATE servomotor must be locked electrically. Otherwise, the adjusting eccentric will
suffer excessive wear, or be destroyed.
7.2 Installation location
The installation location of the dosing pump must be easily accessible by operating and service personnel.
ATTENTION!
Ambient temperatures above 40 °C are not permitted. Radiant heat from apparatus and heat exchangers
must be shielded so that heat from the dosing pump can be dissipated sufficiently. Avoid exposure to direct
sunlight. If the dosing pump is installed outside, provide a roof to protect it from the effects of weather.
Install the pump so that the suction and discharge valves are in vertical position. To ensure stability, the
dosing pump must be screwed onto an appropriate surface. The system piping must not exert any force on
the connections and valves of the dosing pump. To avoid dosing errors at the end of the process, the dosing
pump must be locked electrically and hydraulically.
7.3 Drain pipe
ATTENTION!
Released gases can destroy the dosing pump gear.
Drainage or leakage from the separating chamber must be allowed to flow
downward to the collecting pan. The drain pipe must never lead directly back to the
medium through the tank cover, otherwise released gases may get into the pump
gear. The drain pipe should only lead downward to a gas-free collecting tank, or
downward to a collecting funnel, leaving a sufficient gap from the end of the pipe.
Leakage can then be returned through the funnel and through the tank cover. This
makes it easier to detect any leakages at the gap to the collecting funnel.
ATTENTION!
If a leakage monitor is installed in an area with a potentially explosive atmosphere,
the electrical connection must be intrinsically safe. The drive motor must be electri-
cally interlocked to prevent additional medium escaping if a leak occurs.
7.4 Electrical connection of the pump
The electrical connection of the dosing pump must be made according to the local rules and regulations and
may only be carried out by qualified technical personnel. Cable type and cross-section of the supply lines
must be chosen according to the motor data. The cable passage to the motor terminal box must be made
professionally. We recommend using gland connections with strain-relief clamp. The required protection
class must be ensured by professional-standard installation of the electrical connections.
For external switch-off of the dosing pump, see paragraph 8.2.
ATTENTION!
Dosing pumps with explosion-proof motors must be installed and commissioned by specialists qualified
to work with equipment intended for use in potentially explosive atmospheres. The user is responsible for
ensuring that explosion-proof motors are connected correctly. Both the motor and dosing pump must be
grounded to prevent electrostatic discharges.
DANGER!
Fire hazard. Shock wave: parts may fly off and cause fatal injury. MEMDOS DX must never be used in areas
with a potentially explosive atmosphere. The electrical connection of the dosing pump must be made ac-
cording to the local rules and regulations and may only be carried out by qualified technical personnel.
NOTICE!
The dosing pump must be plugged into a grounded power outlet. The 230 V AC version of the MEMDOS DX
is connected by a safety plug. The 115 V AC version is equipped with a UL/CSA plug.
18 | Operation & Maintenance Instructions | Installation

NOTICE!
Signal cables must not be laid parallel to high-voltage current lines or mains cables. Lay supply and signal
lines in separate channels. An angle of 90° is required at line crossings. If signal lines are longer than 2 m,
shielded cables must be used.
ATTENTION!
To avoid premature wear of the gear, always ensure the correct rotation direction of the motor: counter-
clockwise (to the left), looking toward the fan wheel.
7.4.1 Drive motor connection
IMPORTANT!
Note the data on the motor rating plate
Connection MEMDOS Phases Motor
supplier
Note
W2 U2 V2
U1 V1 W1
L1 L2 L3 PE
E 4...156,
E 160...380
3~ All Y-connection (Standard)
W2 U2 V2
U1 V1 W1
L1 L2 L3 PE
E 4...156,
E 160...380
3~ All Delta connection
MEMDOS E three-phase motors
Connection MEMDOS Phases Motor
supplier
Note
Z1 TB2 U2
U1 Z2 TB1
L N PE
CB
E 4...156 1~ ATB
U1Z1U2 PE
C
12345
T1 L N
T2
Z2
E 4...156 1~ EMG 230 V AC
or 120 V AC (CSA)
Installation | Operation & Maintenance Instructions | 19

Connection MEMDOS Phases Motor
supplier
Note
U2
Z1 U1 Z2
LPE
N
E 160...380 1~ VEM
MEMDOS E alternating current motors
Connection MEMDOS Motor supplier
U2
V2
U1
W2
L2 Stop L1 Run PEN
W1 V1
L
C
Temp.
DX 4...156 ATB
U1Z1U2 PE
CL
12345
T1 L1 L2 N
T2
Z2
Run Stop
DX 4...156 EMG
U2
Z1 U1 Z2
L2
Stop L1
Run PE
N
DX 160...380 VEM
MEMDOS DX alternating current motor
MEMDOS DX control unit Standard version CSA version
L1 RUN BR (brown) BK (black)
L2 STOP BK (black) RD (red)
N BU (blue) or GY (grey) WH (white)
PE GN/YE (green/yellow) GN/YE (green/yellow)
Connection between MEMDOS DX control unit and motor
20 | Operation & Maintenance Instructions | Installation