KNF N 828 Manual
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KNF N 828 Manual

Mini diaphragm vacuum pumps
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KNF 121249-121517 09/19
OEM
MINI DIAPHRAGM
VACUUM PUMPS
Note!
Before operating the pump and the accessories, please read the operating instructions and pay attention to
the safety precautions!
N 828 / N 838
TRANSLATION OF ORIGINAL OPERATING AND
INSTALLATION INSTRUCTIONS
ENGLISH

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Summary of Contents for KNF N 828

  • Page 1 KNF 121249-121517 09/19 N 828 / N 838 TRANSLATION OF ORIGINAL OPERATING AND INSTALLATION INSTRUCTIONS ENGLISH MINI DIAPHRAGM VACUUM PUMPS Note! Before operating the pump and the accessories, please read the operating instructions and pay attention to the safety precautions!

  • Page 2: Table Of Contents

    KNF Neuberger GmbH Alter Weg 3 79112 Freiburg Contents Page Germany 1. About this document ..............3 Phone +49-(0)7664-5909-0 2. Use .................... 4 Fax +49-(0)7664-5909-99 3. Safety ..................6 4. Technical Data ................9 E-mail: info@knf.de 5. Design and function ..............13 www.knf.de...

  • Page 3: About This Document

    Diaphragm Vacuum Pump N 828 / N 838 About this document About this document 1.1. Using the Operating and Installation Instructions The Operating and Installation Instructions are part of the pump. ➔ Pass on the Operating and Installation Instructions to the next owner.

  • Page 4: Use

    Before using a medium, check the compatibility of the materials of the pump head, diaphragm and valves with the medium. Only transfer gases which remain stable under the pressures and temperatures occurring in the pump. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 5 The pumps are not suitable for transferring foodstuffs. The pumps are not suitable for use with aggressive media. Other pumps in the KNF product line are designed for use with aggres- sive media. Please contact us for more information. The pumps must not be used to create vacuum and overpressure simultaneously.

  • Page 6: Safety

    This also applies for unusual operational situations. Note that the temperature of the medium increases when the pump compresses the medium. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 7 In addition a protection against mechanical parts in motion and hot parts, if existing, has to be provided when mounting. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 8 The pump is maintenance-free. But KNF recommends, checking repairs the pump regularly with regard to conspicuous changes in noise and vibrations. Only have repairs to the pumps carried out by the KNF Customer Service responsible. Housing with voltage-caring parts may be opened by technical personnel only.

  • Page 9: Technical Data

    Flow rate at atm. Pressure and nomi- nal speed [l/min]* Flow rate at atm. Pressure and 0.1V control voltage (only .29-version) [l/min]* Tab. 6 *Liters in standard state (1013 mbar) Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 10 Voltage / Frequencies Max. operating current See Type plate Pump power consumption Motor protection class: N 828 AN_ / N 828 KN_ / N 838 IP 00 AN_ / N 838 KN_ Motor protection class: IP 20 N 838.1.2 KNE Maximum permissible mains ±...
  • Page 11 ➔ Take all necessary care to prevent this leading to a dangerous situation. For N 828 KNDC-B, N 828 KN.29DC-B, N 838 KNDC-B, N 838 KN.29DC-B, N 838.1.2 KNDC-B, N 838.1.2 KN.29 DC-B: The pump is protected against overheating by a temperature sensor on the motor board and equipped with overcurrent pro- tection.
  • Page 12 N 838.1.2 KN.29DC-B Maximum permissible ambient 80% for temperatures up to relative humidity 31°C, decreasing linearly to 50% at 40°C. Maximum altitude of installation 2000 [m above sea level] Tab. 11 Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 13: Design And Function

    Inlet (suction side) Electrical connection Motor Fig. 1: Design N 828 _NE Design N 838 _NE Outlet (pressure side) Inlet (suction side) Electrical connection Motor Fig. 2: Design N 838 _NE Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 14 Outlet (pressure side) Inlet (suction side) Fig. 3: Design N 838.1.2 KNE Design N 828 _NDC Outlet (pressure side) Inlet (suction side) Motor Fig. 4: Design N 828 _NDC Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 15 Fig. 5: Design N 838 _NDC Design N 828 KNDC-B and N 828 KN.29DC-B Outlet (pressure side) Inlet (suction side) Motor controller Motor Fig. 6: Design N 828 KNDC-B and N 828 KN.29DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 16 Design N 838.1.2 KNDC-B and N 838.1.2 KN.29DC-B Outlet (pressure side) Inlet (suction side) Motor Motor controller Pneumatic connection Fig. 8: Design N 838.1.2 KNDC-B and N 838.1.2 KN.20DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 17 (1). The transfer chamber (3) is hermetically separated from the pump drive (7) by the diaphragm. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 18: Installation And Connection

    N 838 _NDC N 828 KNDC-B and Fig. 15 N 828 KN.29DC-B N 838 KNDC-B and Fig. 16 N 838 KN.29DC-B N 838.1.2 KNDC-B and Fig. 17 N 838.1.2 KN.29DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 19 Diaphragm Vacuum Pump N 828 / N 838 Installation and connection Fig. 10: Mounting dimensions N 828 _NE (All dimensional tolerances conform to DIN ISO 2768-1, Tolerance Class V) *only N 828 KNE Fig. 11: Mounting dimensions N 838 _NE (All dimensional tolerances...
  • Page 20 Fig. 12: Mounting dimensions N 838.1.2 KNE (All dimensional tolerances conform to DIN ISO 2768-1, Tolerance Class V) Fig. 13: Mounting dimensions N 828 _NDC (All dimensional tolerances conform to DIN ISO 2768-1, Tolerance Class V) Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 21 Fig. 14: Mounting dimensions N 838 _NDC (All dimensional tolerances conform to DIN ISO 2768-1, Tolerance Class V) Fig. 15: Mounting dimensions N 828 KNDC-B and N 828 KN.20DC-B (All dimensional tolerances conform to DIN ISO 2768-1, Tolerance Class V) *Connection (X) only for N 828 KN.29DC-B...
  • Page 22 Fig. 17: Mounting dimensions N 838.1.2 KNDC-B and N 838.1.2 KN.29DC-B (All dimensional tolerances conform to DIN ISO 2768-1, Tolerance Class V) *Connection (X) only for N 838.1.2 KN.29DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 23 ➔ Make sure that vibrations of the pump do not result in hazards associated with adjacent com- ponents. ➔ Protect the pump against contact and intrusion of foreign mat- Foreign matter protection ter. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 24 (strain relief). Pumps with AC motor are fitted as standard with a thermal switch to protect against overloading. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 25 (usual) A.C. / D.C. converter.” The test is applicable for D.C. power inputs which are foreseen for a permanent connection to cables which are longer than 10 m. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 26 Control voltage may only be applied if the motor controller is supplied with operating voltage. Otherwise damages can occur on the motor controller. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 27 / red AWG 18 + Supply voltage - Speisespannung (0V) schwarz / black / GND AWG 18 - Ground (0V) Tab. 12 : Connection plan motor electronics N 8__ K_DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 28 / 5V Power supply U Ausgangsspannung DC 5 ± 0.2 Control voltage range DC Max. Ausgangsstrom [mA] Max. current output Tab. 13 (part 1): Connection plan motor electronics N 8__ K_.29DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 29 Input level „low” → motor OFF [0 … 0.9] Eingangsimpedanz @ 1 kHz ≥ 1.8 [kΩ] Input impedance @ 1 kHz Tab. 13 (part 2): Connection plan motor electronics N 8__ K_.29DC-B Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 30 At the same time the default voltage for the white wire de- creases. Because of this the nominal final speed can no longer be reached. Fig. 20: Exposition Control without Potentiometer Fig. 21: Exposition Control with Potentiometer Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 31 3. Connect the suction line and pressure line (see Chapter 4, Tab. 7 for mounting dimensions). 4. Lay the suction and pressure line at a downward angle to pre- vent condensate from running into the pump. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 32: Operation

    ➔ If the air or gas quantity in the pressure line is throttled or regulated, make sure that the maxi- mum permissible operating pressure is not ex- ceeded. ➔ Ensure that the pump outlet is not closed or constricted. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 33 ➔ Restore the system to normal atmospheric pressure (release Switching off the pump / removing from operation pneumatic pressure in pump). Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 34 ▪ Modify control voltage values U and U Ctrl min Ctrl max ▪ If the control voltage is less than U , the motor will be Ctrl min Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 35 Remote ON/OFF is through an 8-pin controller connection (green wire, see Tab. 13). To start the motor, the green wire must be bridged to the ground of the controller connection (grey wire, blue wire or orange wire). Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 36 Reed-out of the following process parameters: Actual/Nominal motor speed Control limit of motor speed Operating current of the motor Temperature of the motor controller Fault status Software version number Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 37 Nominal motor speed ns ; E Minimum possible nl ; E motor speed Maximum possible nh ; E motor speed Software version V ; E number Tab. 15: Reed commands Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 38 See p. 28 for pin assignment of the motor controller’s commu- nication plug. Parameter Value Low: 0V…0.9V Rx KNF MBLC High: 4.2V…5.2V Low: 0V…0.6V Tx KNF MBLC High: 4.5V…5.2V Tab. 17 Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 39: Servicing

    ➔ Solvent should be used for cleaning only if the head materials are not corroded (ensure compatibility of the material). ➔ If compressed air is available, blow out the parts. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 40 Change the diaphragms and valve plates/sealings in the following sequence: a.) Preparatory steps b.) Remove pump head c.) Change diaphragm d.) Change valve plates/sealings e.) Refit pump head f.) Final steps. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 41 This helps avoid incorrect assembly later. 2. Undo the 4 screws (4) in the head plate and lift the head plate with the intermediate plate off the pump housing. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 42 5. Turn the fan to check that the pump rotates freely. 6. Turn the fan again to bring the structured diaphragm (7) to top dead centre. 7. Now tighten screws (4) firmly diagonally (tightening-torque: 3.5 Nm). Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 43 2. Connect the pump to the electrical supply. If you have any questions about servicing call our technical adviser (contact data: see www.knf.com). 8.3.2. N 828 KN_-versions (with pump head made of plastic) ▪ Requirements Pump disconnected from mains and de-energized.
  • Page 44 Structured diaphragm Diaphragm spacer Screw 10 Screw cap 11 Disk spring Fig. 30: Pump head N 828 KN_-versions (pump head made of plastic) 12 Washer a.) Preparatory steps M Marking 1. Remove the pumps from the source of electrical power. Make sure the pump is voltage-free and secure it.
  • Page 45 7. Place the head plate (3) on the intermediate plate (2), in the position indicated by the marking (M). 8. Check that the head plate (3) is centered by moving it gently sideways. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 46 1. Only in the case of DC versions (no cooling fan): refix the cov- er (5). 2. Connect the pump to the electrical supply. If you have any questions about servicing call our technical adviser (contact data: see www.knf.com). Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 47 Change the diaphragms and valve plates/sealings in the following sequence: a.) Preparatory steps b.) Remove pump head c.) Change diaphragm d.) Change valve plates/sealings e.) Refit pump head f.) Final steps. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 48 Undo the head-plate screws (4) in the head plate (3) and lift the two head-plates with the intermediate plates (2) and the pneumatic connections (13) off the pump housing. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 49 (9) with disk spring (11) and washer (12). Fig. 33: Orientation of the Torque for tightening the screw(s): 35 Ncm. disk spring (11) 10. Carry out steps 1. – 9. For the second pump head. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 50 1. Only in the case of DC versions (no cooling fan) and N 838.1.2 KNE: refix the cover (1). 2. Connect the pump to the electrical supply. If you have any questions about servicing call our technical adviser (contact data: see www.knf.com). Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 51: Troubleshooting

    ➔ Install the pump at the highest point in the system. ➔ Replace diaphragm and valve plates (see Chapter 8.3). Diaphragm or valve plates are worn. Tab. 22 Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 52 ➔ Make sure that the shim rings have been replaced onto the Diaphragm and valve plates have been replaced. diaphragm screw thread. ➔ Check head connection and hose connections for leaks. Tab. 23 Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...
  • Page 53 2. Clean the pump (see Chapter 8.2.2). 3. Send the pump, together with completed Health and Safety Clearance and Decontamination Form, to KNF stating the na- ture of the transferred medium. Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 54: Spare Parts And Accessories

    External potentiometer for setting of the On request speed RS232 Level-Translator with SUB-D9 On request plug RS232Level-Translator with Micro-USB On request plug Completely connectorized control cable On request (analog or digital controlling) Tab. 26 Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19...

  • Page 55: Returns

    Prerequisite for repairing a pump by KNF is a completed Decon- tamination Form. This is made available on the KNF website as a download. To find the form, select your country on the overview page (www.knf.com). You can find the Decontamination Form in the download area.
  • Page 56 KNF worldwide Find your local KNF partner on www.knf.com...

This manual is also suitable for:

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