KNF FEM 1.02 User manual

KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 1
DIAPHRAGM METERING PUMP
FEM 1.02, FEM 1.09
Operating and
Installation
Instructions
Read and observe these Oper-
ating and Installation Instruc-
tions.
An additional letter prefixing the
FEM model code is a country-
specific designation, and does
not have any technical rele-
vance.
KNF Flodos AG
Wassermatte 2
6210 Sursee, Switzerland
Tel. [phone]
Fax [phone]
www.knf.c
om
[e-mail]
Contents Page
1. About this document ................................................................. 2
2. Use ........................................................................................... 3
3. Safety ....................................................................................... 4
4. Technical data .......................................................................... 6
5. Assembly and function ............................................................. 9
6. Installation and connection ..................................................... 11
7. Operation ................................................................................ 16
8. Servicing ................................................................................. 20
9. Troubleshooting ...................................................................... 24
10. Spare parts and accessories .................................................. 26
11. Return of the pump ................................................................. 28
FEM 1.02 KP .27 SM
-
2
.27 /
-
[Ch. 5]
1.02 / 1.09
FEM / UFEM
SM
-
2
-
/ PMLxxxx / PLxxxx [Ch. 1]
KP / KT / TT [Ch. 4]

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 About this document
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 2
1. About this document
1.1. Use of the Operating and Installation Instructions
The Operating and Installation Instructions are part of the pump.
 Forward the Operating and Installation Instructions to any subsequent
owners of the pump.
Customer-specific project pumps (pump models which begin with "PL" or
"PML") may differ from the Operating and Installation Instructions.
 In the case of project pumps, take note of any additionally agreed specifi-
cations.
1.2. Symbols and markings
Warning
WARNING
This symbol indicates a potential danger.
It also indicates the possible consequences of failure
to observe the warning. The signal word (e.g. "Warn-
ing") indicates the level of danger.
 Here you will see actions for avoiding the
danger
and potential consequences.
Danger levels
Signal word Meaning Consequences if not observed
DANGER warns of immedi-
ate danger
Consequences include death or
serious injuries and/or serious
property damage.
WARNING warns of potential
danger
Death or serious injuries and/or
serious property damage are
possible.
CAUTION warns of a poten-
tially dangerous
situation
Minor injuries or damage to
property are possible.
Tab. 1
Other information and symbols
 This indicates an activity (step) that must be carried out.
This indicates the first step of an activity to be carried out. Any additional
steps required are numbered consecutively.
This symbol indicates important information.
Project pumps

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Use
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 3
2. Use
2.1. Intended use
The pumps are intended for transferring and metering liquids.
Owner's responsibility
Only install and operate the pumps under the operating parameters and
conditions described in Chapter 4, Technical data.
Only fully assembled pumps may be taken into service.
Before transferring or metering a medium, check whether the medium can be
transferred danger-free in the specific application case.
Before using a medium, check the compatibility of the materials of the pump
head, pump housing, diaphragm and valves with the medium.
The temperature of the medium must lie within the permissible range (see
Chapter 4).
The pumped medium should not contain particles as these can prevent the
pump from working correctly. If this cannot be ensured, a < 50 m filter with a
sufficiently large filter area must be used upstream of the pump.
2.2. Improper use
The pumps must not be operated in a potentially explosive atmosphere.
The maximum ambient temperature must not exceed 40°C.
Do not use the pump controller in a damp environment or under condensing
conditions.
The controller must be protected against contamination, and contact with
liquids, solvents or vapours must be avoided.
The pump controller must only be operated when adapted to meet the ESD
(Electrostatic Discharge) safety standards.
Do not establish uncontrolled connections between the controller and conduc-
tive cables and materials.
For special modifications to the pumps outside the standard technical specifi-
cations please contact a KNF technical adviser.
Operating parameters and
conditions
Requirements for
transferred medium

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Safety
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 4
3. Safety
Observe the safety precautions in Chapters 6, Installation and
connection and 7, Operation.
The pumps are built according to the generally recognised rules of technology
and in accordance with the pertinent occupational safety and accident preven-
tion regulations. Nevertheless, dangers can result during their use which lead
to injuries to the user or others, or to damage to the pump or other property.
Only use the pumps when they are in a good technical and proper working
order, in accordance with their intended use, observing the safety advice
within the Operating and Installation Instructions, at all times.
Make sure that only trained and instructed personnel or specially trained
personnel work on the pumps. This especially applies to assembly, connection
and servicing work.
Make sure that all personnel have read and understood the Operating and
Installation Instructions, and in particular the "Safety" chapter.
Observe the accident prevention and safety regulations when performing any
work on the pump and during operation.
When transferring dangerous media, observe the safety regulations for han-
dling such media.
Always ensure adherence to all information stickers on the pumps, such as
flow direction arrows and type plates, and keep stickers in legible condition.
All replacement parts should be properly stored and disposed of in accord-
ance with the applicable environmental protection regulations. Ensure adher-
ence to the pertinent national and international regulations. This especially
applies to parts contaminated with toxic substances.
Dispose of all packaging in an environmentally-appropriate manner.
The packaging materials are recyclable.
Ensure that the old appliance is disposed of in an envi- ronmen-
tally-appropriate manner. Use appropriate waste collection systems
for the disposal of end-of-life equipment. Used pumps contain
valuable recyclable materials.
Personnel
Working in a
safety-conscious manner
Handling dangerous media
Notes
Environmental protection
Disposal

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Safety
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Translation of Original Operating and Installation Instructions 5
The pumps are in accordance with the requirements of the guidelines
2011/65/EU (ROHS2)
For the purposes of the Machinery Directive 2006/42/EC, pumps are “partly
completed machinery", and are therefore to be regarded as not ready for use.
Partly completed machinery may not be commissioned until such time as it
has been determined that the machine in which the partly completed machin-
ery is to be assembled conforms to the provisions of the Machinery Directive
2006/42/EC. The essential requirements of Annex I of Directive 2006/42/EC
(general principles) are applied and observed.
The following harmonised standards are met:
When used in conjunction with the 2-phase stepping motor controller,
Id. No. 157870 or Id. No. 160536, with up to 1 metre of supply cable, all
FEM 1.02, FEM 1.09 and UFEM 1.09 pumps meet the following standards:
 EN 61000-6-2
 EN 61000-6-4
Please note: when used in conjunction with controllers from
other manufacturers, compliance with the above standards
cannot be guaranteed.
Please note: when used in conjunction with controllers from
other manufacturers, compliance with CE standards must be
verified by the customer.
All repairs to the pump(s) must be carried out by the relevant KNF Customer
Service team.
Only use genuine parts from KNF for servicing work.
EU directives/standards
Customer services and
repairs

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Technical data
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Translation of Original Operating and Installation Instructions 6
4. Technical data
Pump materials
The pump type KP stands for:
Assembly Material1)
Pump head* PP
Valve plate EPDM
Diaphragm PTFE
Tab. 2 1) according to DIN ISO 1629 and 1043.1
The pump type KT stands for:
Assembly Material1)
Pump head* PP
Valve plate FFKM
Diaphragm PTFE
Tab. 3 1) according to DIN ISO 1629 and 1043.1
The pump type TT stands for:
Assembly Material1)
Pump head* PVDF
Valve plate FFKM
Diaphragm PTFE
Tab. 4 1) according to DIN ISO 1629 and 1043.1
* The pump head comprises a connecting plate and an
intermediate plate (Chapter 8.3, items 3 and 4)
Hydraulic ratings
Parameter Value
Flow rate FEM 1.02 [ml/min] 1), 2) 0.2 – 20
Flow rate FEM 1.09 [ml/min] 1), 2) 0.9 – 90
Permissible pressure [bar g] 6
Suction head [mWG] 4
Tab. 5
1) Measured with water at 23 °C at atmospheric pressure
2) Flow rates may vary from the values shown, depending on fluid viscosi-
ty, pump head material and the hoses/hose connectors used.
Hydraulic ratings, option .27
Parameter Value
Min. overflow pressure [bar] 0.5
Max. overflow pressure [bar] 6.5
Tab. 6
FEM ... .27

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Technical data
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Hydraulic connections
Pump type Connection type
FEM 1.02 (internal thread) UNF 1/4"-28
FEM 1.02 (hose fitting) 4/6 mm
UFEM 1.09 (hose fitting) 1/8"/1/4"
Tab. 7
Electrical specifications FEM 1.02 / FEM 1.09
Motor voltage SM-2
Nominal voltage [V] 1) 5.52
Current [A/Phase] rms 1) 0.6
Inductivity [mH/phase] 14.6
Resistance [Ohms/phase] 9.2
Power consumption [W] 15
Maximum speed [rpm] 200
Step angle 1.8°
Connection type Connector with leads
Tab. 8
1) Nominal voltage and current.
2) The weight may differ slightly from the stated value, depending on the version.
Other parameters
Parameter Value
Permissible ambient temperature range
[°C]
+5 to +40
Permissible media temperature range [°C] +5 to +80
Permissible kinematic viscosity of medium
[cSt]
≤150
Protection class [-] IP40
Weight2) [g] 340
Tab. 9

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Technical data
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Accuracy/reproducibility
The accuracy of the calibrated metering pump is appropriately characterised
by the maximum absolute error A (dependent on the nominal value) and the
maximum relative error B (dependent on the setting value):
 max. inaccuracy ≤ (A + B)
FEM 1.02
Error Value
Absolute error A ≤ ±0.1% of nominal value
Relative error B ≤ ±1.0% of setting value
Tab. 10
FEM 1.09
Error Value
Absolute error A ≤ ±0.1% of nominal value
Relative error B ≤ ±1.0% of setting value
Tab. 11
Example: FEM 1.09; the nominal value for stroke volume is 500 µl
For a setting of 260 µl, the accuracy should therefore be within the following
error limits:
Inaccuracy ≤ (±0.1% x 500 µl) + (±1.0% x 260 µl)
≤ (±0.5 µl) + (±2.6 µl)
≤ ±3.1 µl
≈ ±1.2% of setting value
Under constant environmental conditions the pump achieves a reproducibility
of less than ±1%.
Greater inaccuracies may occur for fluids with a viscosity of >
150 cSt or with a tendency to outgas. Appropriate adjustments
may be made during calibration.
The accuracy of the pump is ultimately a matter of the meas-
urement and pumping system and the parameters with which
the pump is operated. The hose types used and the design of
the hose end at the pressure side play an important part in
precise metering.
FEM 1.02 ... SM-2 and FEM 1.09 ... SM-2 are not calibrated in the factory.
The pump must be calibrated electronically via the controller in the customer
system.
The flow rate may differ from the calibrated value in some applications. This is
influenced by the following factors: type of medium, its viscosity, density and
temperature, pressure and installation type (e.g. cross-section constrictions).
For accurate metering it is therefore recommended that the metering pump be
calibrated.
Accuracy
Reproducibility
Factory calibration
Calibration

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Assembly and function
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
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5. Assembly and function
Assembly without overpressure relief valve
1 Inlet
2 Outlet
3 Pump head
4 Stepping motor (2-phase)
5 Stepping motor plug
Fig. 1: Stepping motor diaphragm metering pump FEM 1.02
Assembly with overpressure relief valve
1 Inlet
2 Outlet
3 Pump head
4 Stepping motor (2-phase)
5 Stepping motor plug
6 Overpressure relief valve
(.27)
Fig. 2: Stepping motor diaphragm metering pump FEM 1.02 ... .27
1 Outlet valve
2 Inlet valve
3 Working chamber
4 Diaphragm
5 Eccentric
6 Connecting rod
7 Pump drive
Fig. 3: Pump assembly
Stepping motor diaphragm metering pumps are based on reciprocating dis-
placement pump technology. The elastic diaphragm (4) is moved up and down
by the eccentric (5) and the connecting rod (6). In the downward stroke it
aspirates the medium to be transferred via the inlet valve (2). In the upward
stroke, the diaphragm pushes the medium out of the pump head via the outlet
valve (1). The diaphragm hermetically seals off the working chamber (3) from
the pump drive (7).

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Assembly and function
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Translation of Original Operating and Installation Instructions 10
FEM … -Version (standard version)
This pump type represents this product in its simplest form and is intended for
continuous delivery at an exact delivery rate.
FEM … .27-Version (with overpressure limitation)
If the metering pump is operating against a closed system, the delivery pres-
sure quickly exceeds the maximum permissible values. To prevent this hap-
pening, an overflow valve is integrated in the top part of the pump head. If the
pressure exceeds the variable limit range (min. 0.5 to max. 6.0 barg), the
valve opens and the liquid circulates from the pressure side to the suction side
via an internal bypass system. This prevents any further rise in pressure.
FEM … .55 version (with single-stroke metering)
The .55 version was specially developed for the KNF stepping motor partial
stroke controller FE Z5. The pumps have a Hall effect sensor for determining
the position of the diaphragms. This is needed during partial stroke metering
or with customer-specific operating profiles.
Please note:
 The FEM … .55 is compatible with KNF controllers FE Z4
and FE Z5.
 The FE Z5 stepping motor partial stroke controller from
KNF can only be used in combination with the FEM ... .55.
FEM … .55 RC version (single-stroke metering incl. controller)
In the .55 RD version the FE Z5 stepping motor partial stroke controller from
KNF is integrated in the pump and is supplied as a single unit.
Detailed information can be found in the relevant operating instructions.
The stepping motor controllers from KNF are available as accessories, see
accessory list in chapter 10. Two different controllers are available.
Stepping motor controller FE Z4 2-phase stepper
standard controller, single speed controller for variable delivery volume,
pulse input for maximum programming capability etc.
Stepping motor partial stroke FE Z5 Dispense
partial stroke controller, partial stroke metering using potentiometer or an-
alogue signals possible, alarm output etc.
More information about the functionality of the KNF controllers FE Z4 and FE
Z5 can be found in the relevant operating instructions.
FEM ...
FEM ... .27
FEM … .55
FEM … .55 RC
KNF stepping motor
controller

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Installation and connection
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 11
6. Installation and connection
Only install the pumps under the operating parameters and conditions de-
scribed in Chapter 4, Technical data.
Observe the safety precautions (see Chapter 3).
6.1. Installation
 Before installation, store the pump at the installation location to bring it up
to ambient temperature.
 Mounting dimensions (see Fig. 4 to 6)
Fig. 4: Mounting dimensions FEM 1.02, FEM 1.02 .27
Fig. 5: Mounting dimensions FEM 1.09, FEM 1.09 .27
Mounting dimensions

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Installation and connection
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Translation of Original Operating and Installation Instructions 12
Fig. 6: Mounting dimensions UFEM 1.09, UFEM 1.09 .27
 Make sure that the installation location is dry and the pump is protected
against water in the form of rain, spray, splashes and drips.
 Protect the pump against dust.
 Protect the pump against vibration and impact.
 Generally speaking, the pump can be mounted in any installation position.
For maximum precision and rapid venting the vertical pumping direction
should ideally run from bottom to top (fig. 7).
Installation location
Installation position
Fig. 7: Optimum installation
position from bottom to top

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Installation and connection
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 13
6.2. Electrical connection
 Only have the pump connected by an authorized specialist.
 Only have the pump connected when the power supply is disconnected.
 When connecting the device to a power source, the relevant norms,
directives, regulations and technical standards must be observed.
The controller must only be operated in accordance with the
ESD (Electrostatic Discharge) safety standards.
Connecting the pump
Make sure that the power supply data match the data on the motor's type
plate. The current consumption can be found on the type plate.
Check actuation algorithm for 2-phase stepping motor (e.g. with KNF
controller see accessory list in chapter 10)
KNF recommendation: Bipolar winding assignment, current-
driven actuation (chopper operation), key data can be found on
the type plate and the data sheet.
The latest algorithms can be found in the literature.
Fig. 8: Lead assignment
Fig. 9: Bipolar winding assignment

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Installation and connection
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Translation of Original Operating and Installation Instructions 14
6.3. Hydraulic connection
 Only connect components to the pump that are designed to handle the
hydraulic data of the pump (see
Chapter 4, Technical data).
 Only use hoses that are suitable for the maximum operating pressure of
the pump (see Chapter 4).
 Only use hoses that are sufficiently chemically resistant to the liquids
being pumped.
6.3.1. Connecting the pump
Arrows on the pump head indicate the flow direction.
FEM 1.02 - Screw-in connection fitting with internal thread
1 Hose
2 Hose connector
3 Clamp ring
4 Connector
Fig. 10: Hose connector 1.6 x 3.2 mm (FEM)
Remove protective caps
Connect the suction and pressure lines
(Recommendation: UNF 1/4“-28 flangeless connection with 1/16“ hose,
see accessories list in Chapter 10)
Keep the suction line as short as possible in order to keep the
priming process as brief as possible.
Check that the hoses (1) and transition joints (hose connector/hose) are
fitted correctly and securely
Check that the system is leak-tight
Connected
components
Hoses

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Installation and connection
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 15
FEM 1.09 / UFEM 1.09 - Clamp ring hose connection fitting
1 Hose
2 Union nut
3 Clamp ring
4 Connector
Fig. 11: 4/6 mm hose connection fitting with clamp ring (FEM)
1/8“/1/4“ hose connection fitting with clamp ring (UFEM)
Remove protective plugs from connections
Using a sharp knife, cut the suction and pressure lines (FEM: hose ID 4
mm, OD 6 mm; UFEM: hose ID 1/8“, OD 1/4“) to the required length, with
straight square edges
Push the union nut (2) and clamp ring (3) onto the hose (1).
Push the hoses onto the connectors as far as they will go
Hand-tighten the union nut (2).
Check that the hoses and transition joints (hose connector/hose) are fitted
correctly and securely
Check that the system is leak-tight

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Operation
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Translation of Original Operating and Installation Instructions 16
7. Operation
 Operate the pumps only under the operating parameters and conditions
described in Chapter 4, Technical data.
 Make sure the pumps are being used properly (see Chapter 2.1).
 Avoid improper use of the pumps (see Chapter 2.2).
 Observe the safety precautions (see Chapter 3).
 The pumps are components that are intended to be incorporated into
another machine. Before putting them into service it must be established
that the machinery or equipment in which they are installed meet the rele-
vant regulations.
CAUTION
Risk of burning
The stepping motor heats up even when at a stand-
still if the motor is actuated!
 Avoid contact with the pump drive
 Avoid contact with flammable materials
WARNING
Danger of bursting of the fluid system due to
overpressure.
The pump builds up pressure. A closed system can
cause the max. permitted operating pressure to be
exceeded. This can cause injuries or damage to the
pump and the system.
 Avoid operation against a closed system.
 Only use wetted parts that are rated for at least
the operating pressure of the pump.

If necessary, limit the maximum system pressure
by suitable measures.
Excessive pressure and the inherent dangers thereof can be
prevented by placing a bypass line with a pressure relief valve
between the pressure and suction side of the pump. For
further information, contact your KNF technical adviser (tele-
phone number: see first page).
 If the pump stops running, restore the system to normal atmospheric
pressure.
Pump standstill

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Operation
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Switching off the pump
 KNF recommends that after transferring aggressive media the pump
should be flushed thoroughly prior to switch off (see Chapter 8.2.1) in or-
der to prolong the life of the membrane.
 Restore the system to normal atmospheric pressure (release hydraulic
pressure in pump).
Suction side filter
The pumped medium should not contain particles as these can prevent the
pump from working correctly. If this cannot be ensured, a < 50 m filter with a
sufficiently large filter area must be used upstream of the pump.

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Operation
KNF Flodos AG BA_FEM1-02_1-09_EN_07_157639.docx
Translation of Original Operating and Installation Instructions 18
7.1. Setting the delivery volume
The delivery volume can be set by adapting the speed. Actuation and control
must be ensured using a suitable stepping motor controller, see chapters 5
and 6.
Accessories:
 Stepping motor controller FE Z4 (standard controller)
 Stepping motor partial stroke controller FE Z5 in combina-
tion with FEM ... .55 (partial stroke controller)
Delivery rate FEM 1.02 … SM-2
Fig. 12: Delivery rate of pump FEM 1.02 with KNF controller FE Z4
Delivery rate FEM 1.09 … SM-2 / UFEM 1.09 … SM-2
Fig. 13: Delivery rate of pump FEM 1.09 with KNF controller FE Z4

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Operation
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Translation of Original Operating and Installation Instructions 19
7.2. Metered volume
Options:
1. Keep speed constant and adjust the metering volume by varying the
operating time.
2. Keep operating time constant and adjust the metering volume by varying
the speed.
Both variants provide extremely accurate metering volumes.
7.3. FEM … .27 version overpressure relief valve adjustment
If the diaphragm metering pump is operating against a closed system, the
delivery pressure quickly exceeds the maximum permissible value. To prevent
this happening, an overflow valve is integrated in the top part of the pump
head. If the pressure exceeds the variable limit range (min. 0.5 to max. 6.5
barg), the valve opens and the liquid circulates from the pressure side to the
suction side via an internal bypass system. This prevents any further rise in
pressure.
1. Connect pressure gauge to pressure side of pump
2. Undo lock nut using an Allen wrench and an open-ended spanner.
3. Switching on the pump
4. Set the required pressure using an Allen wrench
5. Hold Allen wrench and counterhold the nut using the open-ended spanner
6. Re-check the pressure setting
WARNING
 The permissible pressure on the type plate must
not be exceeded under any circumstances.
 The system or the pump may rupture.
Qty. Tools/materials
1 Pressure gauge (with sufficient accuracy)
1 Allen wrench 4 mm
1 Open-ended spanner 13 mm
Tab. 12
Fig. 14: Test set-up for overflow
Make sure that the container
(a), pump (b), pressure gauge
(c) and valve (d) are as level as
possible (± 15 cm)

Stepping motor diaphragm metering pump FEM 1.02 / FEM 1.09 Servicing
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Translation of Original Operating and Installation Instructions 20
8. Servicing
8.1. Servicing schedule
Component Servicing interval
Pump - Regular inspection for external
damage or leaks
Pump head - Clean if the flow rate decreases, the
pump does not work or no vacuum
is created (Chapter 8.2)
Diaphragm and valve
disks
- Change as soon as pumping capac-
ity decreases, preferably sooner
Tab. 13
8.2. Cleaning
WARNING
Health hazard due to dangerous
substances in the pump
Depending on the substance transferred, caustic
burns or poisoning are possible.
 Wear protective clothing if necessary, e.g.
protective gloves.
 Flush the pump with a neutral liquid and pump
empty.
8.2.1. Flushing the pump
 If transferring aggressive media, KNF recommends flushing the pump with
air under atmospheric conditions for several minutes prior to switch off (if
necessary for safety reasons: use an inert gas). This will extend the ser-
vice life of the diaphragm.
8.2.2. Cleaning the pump
 Where possible, wipe the components dry with a cloth. Do not use clean-
ing solvents as these may corrode plastic parts.
 If there is compressed air available, blow off components.
 Pump or drive disconnected from the mains and de-energized.
 The pump must be free of any hazardous substances
 Hoses must be disconnected from the pump head
 We recommend replacing the diaphragm when head parts are re-
moved.
Qty. Tool
1 Torx screwdriver no. 10
1 Allen wrench 4 mm (for .27 only)
1 Open-ended spanner 13 mm (for .27 only)
Tab. 14
Information on procedure
Prior requirements
Tool