KNF NF5 User manual

KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions Keep for future reference!
Micro-diaphragm liquid pump
NF 5
Operating and
Installation
Instructions
Read and observe these oper-
ating and installation instruc-
tions!
An additional letter prefixing
the
NF model code is a country-
specific designation and has no
technical relevance.
Contents Page
1. About this document................................................................. 2
2. Use ........................................................................................... 3
3. Safety ....................................................................................... 5
4. Technical data .......................................................................... 7
5. Assembly and function ........................................................... 11
6. Installation and connection..................................................... 12
7. Operation................................................................................ 15
8. Servicing................................................................................. 18
9. Troubleshooting...................................................................... 20
10. Decontamination declaration.................................................. 22
KNF FLODOS AG
Wassermatte 2
6210 Sursee, Switzerland
Tel. [phone]
Fax [phone]
www.knf-flodos.ch
[e-mail]
NF 5 RP .51 DC
-
S 12V
.51 /
-
[Ch. 2]
RP / RT [Ch. 4]
NF
5
-
/ PMLxxxx / PLxxxx
[Ch. 1]
DC
-
S / DC
-
M / DC
-
L / DCB
-
4
Supply voltage [Ch. 4]

Micro-diaphragm liquid pump NF 5 About this document
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 2
1. About this document
1.1. Using the operating and installation instruc-
tions
The operating and installation instructions are part of the pump.
Pass on the operating and installation instructions to the next
owner.
Customer-specific project pumps (pump models which begin with
"PL" or "PML") may differ from the operating and installation in-
structions.
In the case of project pumps, take note of any additionally
agreed specifications.
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 (i.e. "Warn-
ing") indicates the level of danger.
This specifies measures for avoiding the danger
and the consequences of failure to implement
these measures.
Danger levels
Signal word
Meaning Consequences if not observed
DANGER warns of immedi-
ate danger
Death or serious injuries and/or
serious material damage are the
consequence
WARNING
warns of possible
danger
Death or serious injuries and/or
serious material damage are
possible
CAUTION warns of a poten-
tially dangerous
situation
Minor injuries or material dam-
age are possible
Tab. 1
Other information and symbols
This indicates an activity (step) that needs to be carried out.
This indicates the first step of an activity to be carried out. Any 1.
additional steps required are consecutively numbered.
This symbol refers to important information.
Project pumps

Micro-diaphragm liquid pump NF 5 Use
KNF Flodos BA_NF5_EN_01_152858.docx
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2. Use
2.1. Proper 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.
The pumps may be operated only when fully assembled.
Before transferring or metering a medium, check that it can be
transferred without risk 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
pumped medium.
The temperature of the medium must lie within the permissible
temperature range (see Chapter 4).
The pumped medium should not contain particles as these can
prevent the pump from working correctly. If this cannot be guaran-
teed, a filter < 50 µm with a sufficiently large filter area must be
used upstream of the pump.
The .51 versions of our micro-diaphragm liquid pump range have
been certified by NSF according to the standard NSF/ANSI 169
and are therefore suitable for use with foodstuffs without any
restrictions.
All materials used have been checked through a series of toxico-
logical tests. In order to ensure that the food grade quality is main-
tained, NSF will carry out a yearly audit checking our certified
products.
Only the pumps marked with ".51" are NSF-certified and contain a
defined material combination that also has a FDA certificate of
conformity.
NSF: National Sanitary Foundation
FDA: Food and Drug Administration
ANSI: American National Standard Institute
*Pumps with other customer-specific certified material combinations are
available on request.
Operating parameters and
conditions
Requirements for
transferred medium
.51* version – version with food
grade approval

Micro-diaphragm liquid pump NF 5 Use
KNF Flodos BA_NF5_EN_01_152858.docx
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All certified micro-diaphragm liquid pumps are clearly marked
with “.51” in the type designation along with the NSF-logo on
the type plate. If either or both of these markings are missing,
the pump is not certified.
Because the cleaning requirements of the micro-diaphragm
liquid pumps depend on the application, KNF is unable to
guarantee cleaning options. The responsibility for cleaning the
pump(s) therefore lies with the user. While the NSF/ANSI 169
standard regulates OEM products, it does not define cleaning
methods for specific OEM products.
All parts in contact with the medium can be replaced as spare
parts without losing the certification. Component parts cannot
be traded as certified parts. When replacing parts/assemblies
only use original KNF parts.
2.2. Improper use
The pumps may not be operated in an explosive atmosphere.
For special modifications outside the standard technical specifica-
tions please contact a KNF pump specialist.

Micro-diaphragm liquid pump NF 5 Safety
KNF Flodos BA_NF5_EN_01_152858.docx
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3. Safety
Note the safety precautions in Chapters 6. Installation and
connection, and 7. Operation.
The pumps are built according to the generally recognized rules of
technology and in accordance with the pertinent occupational
safety and accident prevention 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 in perfect working order and in accordance
with their intended use. Always ensure adherence to the operating
and installation instructions and work in a safety-conscious man-
ner.
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 operat-
ing and installation instructions, and in particular the "Safety"
chapter.
Always ensure adherence to all pertinent accident prevention and
safety regulations when working on and operating the pump.
Always observe the safety regulations when handling dangerous
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
accordance with the applicable environmental protection regula-
tions. Ensure adherence 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 pump is disposed of in an environmentally
appropriate manner at the end of its useful life. Use appro-
priate 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

Micro-diaphragm liquid pump NF 5 Safety
KNF Flodos BA_NF5_EN_01_152858.docx
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The pumps are in accordance with the requirements of the guide-
lines 2011/65/EU (ROHS2)
The pumps conform to EU safety requirements and guidelines for
Electromagnetic interference 2004/108/EC.
As defined in the Machinery Directive 2006/42/EC, pumps are
partly completed machines and not ready-for-use, the overall
equipment must be made to fully conform with the requirements of
the Directive before being brought into service. Always ensure
implementation and enforcement of the basic requirements of the
Machinery Directive 2006/42/EC according to Appendix I (General
Principles).
The following harmonised standards are met:
NF 5 DC-S and NF 5 DC-M
EN 55022
EN 55011
NF 5 DC-L
EN 55022
EN 55011
NF 5 DCB-4
EN 61000-6-2
EN 61000-6-3 (incl. EN 55022 / EN 55011)
All repairs to the pump(s) must be carried out by the relevant KNF
Customer Service team.
Only use KNF original parts for all maintenance work.
EU directives/standards
Customer services and
repairs

Micro-diaphragm liquid pump NF 5 Technical data
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 7
4. Technical data
Pump materials
The pump type RP stands for:
Assembly Material
1)
Pump head * PPS
Valve plate EPDM
Diaphragm EPDM
Tab. 2
1)
according to DIN ISO 1629 and 1043.1
The pump type RT stands for:
Assembly Material
1)
Pump head * PPS
Valve plate FFPM
Diaphragm FFPM
Tab. 3
1)
according to DIN ISO 1629 and 1043.1
* The pump head (Fig. 1) comprises a connecting plate and an intermedi-
ate plate
Hydraulic ratings
Parameter Value
Flow rate DC-S / -M / -L [ml/min]
1), 2)
≥50
Flow rate DCB-4 [l/min]
1), 2)
≥5 - 60
Permissible pressure DC-S [bar g] 0.6
Permissible pressure DC-M / -L / DCB-4
[bar g]
1
Suction head DC-S / -M / -L / DCB-4
[mWG]
3.5
Tab. 4
1)
Measured with water at 20°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 connections
Parameter Value
Recommended hose size ID [mm] ≤ 3
Tab. 5

Micro-diaphragm liquid pump NF 5 Technical data
KNF Flodos BA_NF5_EN_01_152858.docx
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Specifications NF 5 DC-S
Type 6V
Power consumption [W] 1.08
Max. I load [A] 0.18
Max. perm. current consumption
[A] 0.23
Lead size [-] AWG22
Protection class [-] IP30
Weight
1)
[g] 32
Tab. 6
Specifications NF 5 DC-M
Type 6V 12V
Power consumption [W] 0.96 0.96
Max. I load [A] 0.16 0.08
Max. perm. current consumption
[A] 0.235 0.121
Lead size [-] AWG22
Protection class [-] IP30
Weight
1)
[g] 42
Tab. 7
Specifications NF 5 DC-L
Type 6V 12V
Power consumption [W] 0.54 0.65
Max. I load [A] 0.09 0.054
Max. perm. current consumption
[A] 0.182 0.092
Lead size [-] AWG26
Protection class [-] IP30
Weight
1)
[g] 36
Tab. 8
Specifications NF 5 DCB-4
Type DCB-4
Supply voltage [V] 10…28
Power consumption [W] 1.5
Max. I load [A] 0.15…0.055
Max. perm. current consumption
[A] 0.65
Protection class [-] IP40
Weight
1)
[g] 30
Tab. 9
1)
The weight may differ slightly from the stated value, depending on the
version.

Micro-diaphragm liquid pump NF 5 Technical data
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 9
Motor electrical specifications DCB-4
Electrical connections
Lead assignment
Function Wire colour Signal
name Size
+ Supply voltage red + Vs AWG 28
- Supply voltage black - Vs / GND AWG 28
Speed control – input
signal white Vctrl AWG 28
Frequency output –
output signal green FG AWG 28
DC control input Vctrl
Control voltage range DC [VDC] 0...5
Speed range [rpm] 0..2300
Resistant to surge voltages [VDC] <28
Input resistance (Vctrl < 5.3VDC) [kΩ] 62
Threshold voltage [VDC] 0.11
Speed/voltage constants [rpm/V] 460
Control voltage characteristic
FG frequency ouput
FG pulse per mech. revolution [ ] 6
Pulse duty factor [%] 50
Output series resistance [kΩ] 3.9
Output level "high" (Iout <0.1mA) [V] 4.2 … 5.4
Output level "low" (Iout <0.1mA) [V] max. 0.5
Tab. 10
Connecting (short-circuiting) the two connections "Frequency
output – output signal" (green lead) and "Speed control – input
signal" (white lead) switches the control to "2-lead" operating
mode (DCB-2 24V).
In the case of type NF 5 DCB-4, the supply voltage is not
designed for operation with pulse-width modulated voltages
(PWM).
However, a PWM signal (frequency ≥500Hz ) can be used to
control the control voltage.
Electrostatic sensitive components (ESD)
Vctrl max
. 5V
(2300 rpm)

Micro-diaphragm liquid pump NF 5 Technical data
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 10
Various parameters
Parameter Value
Permissible
ambient temperature range [°C]
+ 5 to + 40
Permissible media temperature [°C] + 5 to + 80
Permissible kinematic viscosity of the
media [cSt]
≤150
Tab.11

Micro-diaphragm liquid pump NF 5 Assembly and function
KNF Flodos BA_NF5_EN_01_152858.docx
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5. Assembly and function
Assembly
1
Outlet
2Inlet
3Connecting plate
4Drive
5Connecting leads
6 Intermediate plate
Fig. 1: Micro-diaphragm liquid pump NF 5
1
Exhaust valve
2Inlet valve
3Working chamber
4Diaphragm
5Eccentric
6Connecting rod
7Pump drive
Fig. 2: Operating principle
Diaphragm liquid pumps are based on reciprocating displacement
pump technology. An elastic diaphragm (4) is moved up and down
by the eccentric (5) and the connecting rod (6). During the down
stroke, the diaphragm sucks in the medium through the inlet valve
(2). During the up stroke, it forces medium out of the pump head
through the exhaust valve (1). The diaphragm hermetically seals
off the working chamber (3) from the pump drive (7).

Micro-diaphragm liquid pump NF 5 Installation and connection
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 12
6. Installation and connection
Only install and operate the pumps under the operating parameters
and conditions described in Chapter 4, Technical data.
Observe the safety notes (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. 3 to 6)
Fig. 3: Mounting dimensions NF 5 DC-S
Fig. 4: Mounting dimensions NF 5 DC-M
Mounting dimensions

Micro-diaphragm liquid pump NF 5 Installation and connection
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 13
Fig. 5: Mounting dimensions NF 5 DC-L
Fig. 6: Mounting dimensions NF 5 DCB-4
Make sure that the installation location is dry and the pump is
protected against rain, splashes, hose and drip water.
Protect the pump against dust.
Protect the pump against vibrations and jolts.
Generally speaking, the pump can be mounted in any orienta-
tion. The venting and accuracy of the pump is optimal if in-
stalled as shown in the illustration (Fig. 7).
Installation location
Mounting orientation
Fig. 7: Optimal mounting orien-
tation

Micro-diaphragm liquid pump NF 5 Installation and connection
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6.2. Electrical connection
Pump should only be connected by a specialist.
Only connect the pump when the power supply is turned off.
All electrical connection work must adhere to the pertinent
guidelines, regulations and technical standards.
Connecting the pump
Make sure that the power supply data match the data on the 1.
motor type plate. The current consumption can be found on the
type plate.
Connect the motor cables. Electrical data Chapter 4. 2.
Always check polarity of cables.
For DC motors:
red motor cable: +
black motor cable: -
In the case of brushless DC motors:
incorrect polarity may damage the electronics!
6.3. Hydraulic connection
Only connect components to the pump that are designed to
handle the hydraulic data of the pump (see Chapter 4, Tech-
nical data).
Only use hoses that are suitable for the maximum operating
pressure of the pump (see Chapter 4).
Only use hoses that are chemically resistant to the liquids
being pumped.
6.3.1. Connecting the pump
Arrows on the pump head indicate the flow direction.
Remove the protective caps from the connections. 1.
Connect the inlet and outlet lines. 2.
Keep the inlet line as short as possible in order to keep the
priming process as brief as possible.
If the pump is used to build up pressure, make sure that all 3.
transition joints between hose and pump are secure in order to
ensure that the hoses cannot come off.
Check that the hoses and transition joints are fitted correctly 4.
and securely.
Check that the system is leak-tight. 5.
Connected
components
Hoses

Micro-diaphragm liquid pump NF 5 Operation
KNF Flodos BA_NF5_EN_01_152858.docx
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7. Operation
The pumps should only be used under the operating parame-
ters/conditions described in Chapter 4, Technical data.
Ensure that the pumps are being used correctly (see Chapter
2.1).
Improper use of the pumps must be prevented (see Chapter
2.2).
Observe the safety notes (see Chapter 3).
Pumps are components intended to be incorporated into
another machine. The machine/equipment in which the pumps
are installed must be made to fully comply with the pertinent
regulations before being put into operation.
CAUTION
Risk of burning
The drive heats up.
Avoid contact with the pump drive.
Avoid contact with flammable materials.
Excessive pressures and its inherent dangers can be prevent-
ed by using a bypass system with a pressure relief valve
between the pressure and suction side of the pump. Further
information is available from your KNF adviser (Telephone
number: see first page).
If the pump stops running, reduce the pressure in the system
until it is at normal atmospheric pressure.
For pumps with thermal switch or electronic overload protection:
WARNING
Risk of physical injury and damage to the pump due
to automatic start
If the pump overheats and the thermal switch / elec-
tronics stops pump operation, the pumps will restart
automatically as soon as they have had time to cool
down.
Take steps to ensure that this cannot produce a
hazardous situation.
Switching the pumps on and off
The motor speed of the pumps, and thus the flow rate, is adjusta-
ble and can also be regulated to some extent.
For more details, see Chapter 4, Technical data.
Pump standstill
Adjusting and controlling the
motor speed

Micro-diaphragm liquid pump NF 5 Operation
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 16
Duty cycle / impulse operation
KNF pumps are designed for continuous operation.
Short start and stop cycles may adversely affect the service life of
the brushed motors.
If the pump is operated with short cycles in your application,
please contact a KNF pump specialist for further information
(Telephone number: see first page).
Turning the pump on
In order to guarantee that the pump can start every time it is
advisable to reduce the back pressure to an acceptable level.
This is also the case if there is a short power cut.
For more specific information contact the KNF specialists.
Turning the pump off
KNF recommends: if pumping aggressive liquids, the pump
should be rinsed thoroughly prior to switch off (see Chapter
8.2.1), as this will help to lengthen the service life of the dia-
phragm.
Ensure that the system is subject to normal atmospheric pres-
sure (release the hydraulic pressure).
Flow rate NF 5
0.0
10.0
20.0
30.0
40.0
50.0
60.0
-4.0 -2.0 0.0 2.0 4.0 6.0
Suction height [mWg] Pressure [mWg]
Flow rate [ml/min]
Fig. 8: Flow rate of pump NF 5 DC-S
0.0
10.0
20.0
30.0
40.0
50.0
60.0
-4.0 -2.0 0.0 2.0 4.0 6.0 8.0 10.0
Suction height [mWg] Pressure [mWg]
Flow rate [ml/min]
Fig. 9: Flow rate of pumps NF 5 DC-M and NF 5 DC-L
Impulse operation

Micro-diaphragm liquid pump NF 5 Operation
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 17
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
-4.0 -2.0 0.0 2.0 4.0 6.0 8.0 10.0
Suction height [mWg] Pressure [mWg]
Flow rate [ml/min]
Fig. 10: Flow rate of pump NF 5 DCB-4
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
0.0 1.0 2.0 3.0 4.0 5.0
Control voltage [V]
Flow rate [ml/min]
Fig. 11: Flow rate of pump NF 5 DCB-4, depending on control voltage

Micro-diaphragm liquid pump NF 5 Servicing
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 18
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)
Valve plates and seals -Change as soon as pumping capac-
ity decreases, preferably sooner
Tab. 12
8.2. Cleaning
WARNING
Health hazard due to dangerous substances in the
pump!
Depending on the substance transferred, risk of
caustic burns or poisoning.
Wear protective clothing if necessary, e.g.
protective gloves.
Rinse the pump with a neutral liquid and pump
empty.
8.2.1. Flushing the pump
If pumping 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 service life of the diaphragm.
8.2.2. Cleaning the pump
Where possible, wipe the components with a soft dry cloth. Do
not use cleaning solvents as these may corrode plastic parts.
If there is compressed air available, blow off the separate
parts.
Pump must be switched off and mains plug removed from
the socket.
The pump must be free of any hazardous substances.
Hoses must be disconnected from the pump head.
We recommend replacing the diaphragm when the head
parts are removed.
Qty. Tool
1 Phillips screwdriver No. 1
1 T6 Torx screwdriver
Tab. 13
Information on procedure
Prior requirements
Tools

Micro-diaphragm liquid pump NF 5 Servicing
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 19
Dismantling the pump head
Use a Phillips screwdriver to undo the centre head screw (1).
1.
Use a T6 Torx screwdriver to undo the 4 outer head screws 2.
(2).
Removing the valves and seals
Remove the two anchor valves (4) from the intermediate plate 3.
(6) and the connecting plate (3).
Remove the two anchor valve seals (5) from the intermediate 4.
plate (6)
Cleaning the parts
Clean the anchor valves (4), the anchor valve seals (5) and the 5.
diaphragm (7) with a cloth and then blow off with compressed
air.
Blow off the intermediate plate (6) and the connecting plate (3) 6.
with compressed air.
Mounting the valves and seals
Insert the seals (5) in the intermediate plate (6). 7.
Insert the anchor valves (4) in the intermediate plate (6) and 8.
the connecting plate (3).
Mounting the pump head
Insert the intermediate plate (6). 9.
CAUTION: Make sure that the orientation is correct so that the
connections point in the right direction!
A pin and hole system prevents incorrect assembly.
Mount the connecting plate (3) and intermediate plate (6) on 10.
the pump housing (8) and secure by tightening the 4 outer
head screws (2)
Use a Phillips screwdriver to tighten the centre head screw. 11.
8.3. Replacing parts
Same procedure as in Chapter 8.2, "Cleaning", except that instead
of cleaning the anchor valves (4) and seals (5), these components
must be replaced.
Fig. 12
1Centre head screw
2Outer head screws
3Connecting plate
4Anchor valves
5Seals
6Intermediate plate

Micro-diaphragm liquid pump NF 5 Troubleshooting
KNF Flodos BA_NF5_EN_01_152858.docx
Translated from the Original Operating and Installation Instructions 20
9. Troubleshooting
Before working on the pump disconnect the pump from the
power supply.
Ensure that the pump is de-energised.
Pump does not
work
Cause Fault remedy
Pump not connected to mains
power supply
Connect pump to mains supply
Power supply is not switched on
Switch on power supply
Connections or pipes are
blocked
Check pipes and connections
Remove blockage
External valve is closed or filter
is blocked
Check external valves and filters
Anchor valves or seals are worn
out
Replace anchor valves and/or seals
(see Chapter 8.3)
Tab. 14
Pump is not priming
Cause Fault remedy
Suction side of pump not con-
nected
Connect the suction side of the pump
Liquid in the container is too low
Fill container
Hose connections are not leak-
tight
Secure transition joints between hose and connections with
clamps or clamping elements
System valve is closed or filter
is blocked
Open the system valve
Clean filter
Pump head is filled with gas.
The system is unable to handle
the pressure on the pressure
side.
Reduce pressure on pressure side
Particles in the pump Clean the pump head (see Chapter 8.2)
The pump parts are not media-
resistant
Replace the pump head with a compatible version
Incorrect interchange of outlet
and inlet line connections
Remove outlet and inlet lines and re-connect correctly
Tab. 15