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KNF 317428-338560 06/22 N820.18 CN / N840.18 CN TRANSLATION OF ORIGINAL OPERATING INSTRUCTION ENGLISH DIAPHRAGM PUMP Notice! Before operating the pump and accessories, read and observe the operat- ing and installation instructions as well as the safety information!
Index 1 Scope of delivery................... 3 2 About this document ................ 4 2.1 Using the operating instructions............ 4 2.2 Exclusion of liability............... 4 2.3 Symbols and markings.............. 5 3 Use...................... 7 3.1 Proper use .................. 7 3.2 Improper use................. 8 4 Safety ....................
2. If the packaging is damaged, inform the responsible for- warding agent so that a damage report can be prepared. For further information, read Chapter 7 Transport [} 18]. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
à In the event of uncertainties with regard to the content of the operating instructions, please contact the manufac- turer (contact data: see www.knf.com). Please have the type and serial number of the pump ready. à Read the operating instructions before you commission the pump.
An activity to be carried out is specified here (a step). 1. The first step of an activity to be carried out is specified here. Other sequentially numbered steps follow. This symbol indicates important information. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Warning of hand injuries through crushing ESD protected area Observe the operating instructions General mandatory sign Unplug mains plug Use foot protection Use hand protection Environmentally conscious disposal Tab.2: Explanation of pictograms Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Accessories Laboratory accessories or additional components that are connected to a pump must be designed for the pneumatic data of the pump (see 5 Technical data [} 12]). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Pumps that can produce both vacuum as well as overpres- sure may not be used to simultaneously produce vacuum and overpressure. No overpressure may be applied to the suction side of the pump. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Working with When pumping hazardous media, follow the safety regula- hazardous me- tions that apply for working with these media. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Where applicable, also take into account external energy sources (such as radiated heat sources) that might heat the medium further. In case of doubt, contact KNF Customer Service. Environmental Store and dispose of the pump, as well as all replacement...
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Only have repairs to the pumps performed by the responsible KNF Customer Service department. Housings with electrically live components may only be opened by specialist personnel. Use only genuine spare parts from KNF when performing servicing work. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Flow rate at atm. pressure [l/ min]** At min. speed: 10 ± 10% At max. speed: 20 ± 10% Tab.4: Pneumatic data N820G *Bar rel related to 1013 hPa **Liters in standard state (1013 hPa, 20°C) Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Voltage [V] 100 – 240 Frequency [Hz] 50/60 Power consumption [W] Max. current consumption [A] 0.66 – 0.35 1.0 – 0.6 Max. permissible mains volt- ± 10% age fluctuations Tab.7: Electrical data Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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259 x 220 x 163 Dimensions L x H x W [mm] N840G 289 x 240 x 177 § Equipment protection Overcurrent protection § Overtemperature protec- tion (drive) § Blocking protection (drive) Tab.9: Other parameters Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Fig.1: Diaphragm pump (pump N820G shown) *Interface: Injury to property resulting from use of non-authorized accessories à Only ever use accessories that are authorized by KNF (see the NOTICE chapter entitled 12.2 Accessories [} 42]). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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(2). In the upwards stroke, the diaphragm presses the medium out of the pump head via the outlet valve (1). The transfer chamber (3) is separated from the pump drive by the di- aphragm. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
The final vacuum that can be achieved is worse when the gas ballast valve is open (see the chapter entitled 5 Technical data [} 12]). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Transport the pump in the original packaging to the instal- lation location. à Store the original packaging of the pump (e.g. for later storage). à Inspect the pump for transport damage after receiving it. à Document any transport damage in writing. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Permissible humidity (non- 30 to 85 condensing) [%] Tab.10: Transport parameter and storage parameter Prior to commissioning, make sure that the pump has reached the ambient temperature (5 Technical data [} 12]). NOTICE Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Select a secure location (flat surface) for the pump. à Protect the pump from dust. à Protect the pump from vibration, impact and external dam- age. à Make sure that it is easy to operate the power switch. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
- Pump outlet not closed or restricted. - When operating with gas ballast: When vent- ing the pump through the air inlet, no explosive or poisonous mixtures can occur. Tab.11: Operating requirements for commissioning Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Ensure the proper use of the pump (See Chapter 3.1 Proper use [} 7]). à Eliminate the possibility of improper use of the pump (see Chapter Improper use). à Observe the safety instructions (see Chapter 4 Safety [} 9]). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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à Ensure that the pump outlet is not closed or restricted. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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1. Remove the hose connector on the pneumatic outlet with the supplied tool (see 1 Scope of delivery [} 3]). 2. Finger-tighten the silencer or its vacuum system compo- nent on the pneumatic outlet. 3. Connect the line to the pneumatic inlet. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Pump discharge 3. When using as a vacuum pump: Safely drain the pump discharge at the pneumatic outlet of the pump. 4. Plug the plug of the power cable into a properly installed, grounded socket. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
(drive) and switching off the pump. Fig.5: Switching the pump on and off with rotary/push knob à Ensure that no pressure is present in the lines when switching on. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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à Illuminates blue if the pump was also switched on via the rotary/push knob. Pump is running: The higher the speed is set, the brighter the status display lights up. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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100% ON (continuous light) Drive blocked 50% ON; 50% OFF Temperature too high (drive) 90% ON, 10% OFF Other fault Tab.12: Fault signal via status display For further information, see Chapter 11 Troubleshooting [} 38]. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
à Servicing may only be performed according to the legal regulations (e.g. work safety, environmental protection) and provisions. à Servicing may only be performed by specialized personnel or trained and instructed personnel. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
à Periodically check for no- ticeable changes to noises and vibrations. à Diaphragm and valve plates/ At the latest, replace seals when the pump flow rate decreases. Tab.13: Servicing schedule Translation of Original Operating Instruction, KNF 317428-338560 06/22...
(if necessary for safety reasons: with an inert gas). 10.2.2 Cleaning the pump à Only clean the pump with a damp cloth and non- flammable cleaning agents. à If compressed air is present, blow out the parts. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Always replace diaphragms, valve plates/seals, and O- the procedure rings together to maintain the performance of the pump. à Replace the diaphragms and valve plates/seals of the in- dividual pump heads one after the other. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Initial steps Fig.7: Dismount cover 1. Set the handle (1/Fig. 7) to a vertical position. 2. Loosen the screws (2/Fig. 7) on the cover (3/Fig. 7). 3. Remove the cover (3/Fig. 7). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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(6) with a continuous pencil stroke. This prevents the parts from being incorrectly mounted later on. 2. Loosen the external screws (4/Fig. 7) of the pump heads. 3. Carefully remove the pump heads. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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9 Gas ballast valve 10 Connection tube 11 Hose connections Fig.9: Changing O-rings 1. Pull the two pump heads apart. 2. Pull the connection tube (10/Fig. 9) out of the head cover (3). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Mounting the pump head 1. Move the diaphragms (7) to the center position. 2. Press on the entire perimeter of the diaphragm (7). Only press on the diaphragm (7) on one pump head. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Disconnect the pump electrically and pneumatically again. 2. Pump integrated in application à Connect the suction and pressure sides to the pump. à Electrically connect the pump. à Test the functionality of the pump. Translation of Original Operating Instruction, KNF 317428-338560 06/22...
(if necessary for safety reasons: with an inert gas). à Diaphragms or valve Replace the diaphragms and the valve plates/seals plates/seals are worn. (see Chapter Replacing diaphragm and valve plates). Tab.16: Troubleshooting: Pump not delivering Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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à Head parts are soiled. Clean the head components. à Diaphragms or valve Replace the diaphragms and the valve plates/seals plates/seals are worn. (see Chapter Replacing diaphragm and valve plates). Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Allow the pump to cool. tection has tripped. à Determine the cause of the overheating and rectify. Tab.19: Troubleshooting: Pump is switched on but not running; sta- tus display is flashing red Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Pull power cable of the pump out of the socket. à Allow the pump to cool. à Contact KNF Customer Service. Tab.21: Troubleshooting: Pump is switched on but not running; sta- tus display is flashing red Translation of Original Operating Instruction, KNF 317428-338560 06/22...
Spare parts and accessories Diaphragm pump N820.18 CN / N840.18 CN 12 Spare parts and accessories To order spare parts and accessories, please contact your KNF sales partner or KNF Customer Service (con- tact data: see www.knf.com). 12.1 Spare parts Spare part set...
If necessary, request original packaging for a fee. Returns KNF shall undertake to repair the pump only under the condi- tion that the customer presents a certificate regarding the medium that is pumped and the cleaning of the pump. Please follow the instructions at knf.com/repairs here.
Scope of delivery ...... 3 Servicing ........ 11 Silencer........ 3, 24 Spare part ........ 42 Media Spare part set ...... 42 Combustible media.... 10 Status display ...... 15, 27 Hazardous media ...... 9 Medium........... 7 Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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Media temperature .... 14 Storage temperature .... 19 Tools.......... 32 Transfer chamber ...... 16 Transport ........ 18 Troubleshooting...... 38 Ultimate vacuum...... 12 Vacuum operation ...... 24 Warning notice ....... 5 Weight .......... 14 Translation of Original Operating Instruction, KNF 317428-338560 06/22...
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KNF Neuberger GmbH Alter Weg 3 79112 Freiburg Germany Tel. +49 (0)7664/5909-0 E-mail: info.de@knf.com www.knf.com KNF worldwide You can find our local KNF partners at: www.knf.com...
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