vacuubrand ME 2 NT User manual

page 1 of 67
Diaphragm pumps
Instructions for use
Technology for Vacuum Systems
ME 2 NT - ME 4 NT - ME 4S NT
MZ 2 NT - MZ 2D NT - MZ 2S NT
ME 8 NT - ME 8S NT - MD 4 NT - MD 4S NT - MV 2 NT
ME 4R NT
MD 4CRL NT

page 2 of 67
After sales service:
Contact your local dealer or call [phone].
Dear customer,
Your VACUUBRAND diaphragm pumps are designed to provide you with
many years of trouble-free service with optimal performance. Our many
years of practical experience allow us to provide a wealth of application
and safety information. Please read these instructions for use before the
initial operation of your pump.
VACUUBRAND diaphragm pumps combine our many years of experi-
ence in design, construction and practical operation, with the latest de-
velopments in material and manufacturing technology.
Our quality maxim is the ”zero defect” principle:
Every diaphragm pump, before leaving our factory, is tested intensively,
including an endurance run of 18 hours. Any faults, even those which oc-
cur rarely, are identied and can be eliminated immediately.
After completion of the endurance run, every pump is tested, and must
achieve specications before shipment.
We are committed to providing our customers only pumps that meet this
high quality standard.
While our pumps cannot eliminate all of your work, we design, manufac-
ture and test them to ensure that they will be an effective and trouble-free
tool to assist you in that work.
Yours,
VACUUBRAND GMBH + CO KG
Trademark index:
VACUU•LAN® (US-Reg.No 3,704,401), VACUU•BUS®, VACUU•CONTROLTM,
chemistry-HYBRIDTM, Peltronic®, TURBO•MODETM, VARIO® (US-Reg.No
3,833,788), VARIO-SPTM, VACUUBRAND®(US-Reg.No 3,733,388) and also
the shown company logos are trademarks of VACUUBRAND GMBH +
CO KG in Germany and/or other countries.

page 3 of 67
DE
Achtung: Die vorliegende Betriebsanleitung ist nicht in allen EU-Sprachen verfügbar.
Der Anwender darf die beschriebenen Geräte nur dann in Betrieb nehmen, wenn er
die vorliegende Anleitung versteht oder eine fachlich korrekte Übersetzung der voll-
ständigen Anleitung vorliegen hat. Die Betriebsanleitung muss vor Inbetriebnahme
der Geräte vollständig gelesen und verstanden werden, und alle geforderten Maß-
nahmen müssen eingehalten werden. ”Sicherheitshinweise für Vakuumgeräte”
EN
Attention: This manual is not available in all languages of the EU. The user must not
operate the device if he does not understand this manual. In this case a technically
correct translation of the complete manual has to be available. The manual must
be completely read and understood before operation of the device and all required
measures must be applied. ”Safety instructions for vacuum equipment”
FR
Attention: Le mode d’emploi présent n’est pas disponible dans toutes les langues
d’Union Européenne. L’utilisateur ne doit mettre le dispositif en marche que s’il
comprend le mode d’emploi présent ou si une traduction complète et correcte du
mode d’emploi est sous ses yeux. Le dispositif ne doit pas être mis en marche
avant que le mode d’emploi ait été lu et compris complètement et seulement si le
mode d’emploi est observé et tous les mesures demandées sont prises.
«Avis de sécurité pour des dispositifs à vide»
BG
Внимание: Тези инструкции не са преведени на всички езици от ЕО. Потреби-
телят не бива да работи с уреда, ако не разбира инструкциите за ползване. В
този случай е необходимо да бъде предоставен пълен технически превод на
инструкциите за ползване. Преди работа с уреда е задължително потребите-
лят да прочете изцяло инструкциите за работа.
”Указания за безопасност за вакуумни уреди”
CN
注意：该操作手册不提供所有的语言版本。操作者在没有理解手册之前，不能操作
该设备。在这种情况下，需要有一个整个操作手册技术上正确的翻译。在操作该设
备前，必须完全阅读并理解该操作手册，必须实施所有需要的测量。
真空设备的安全信息
CZ
Upozornění :Tento návod k použití není k dispozici ve všech jazycích Evropské
unie. Uživatel není oprávněn požít přístroj pokud nerozumí tomuto návodu. V tako-
vém případě je nutno zajistit technicky korektní překlad manuálu do češtiny. Návod
musí být uživatelem prostudován a uživatel mu musí plně porozumět před tím než
začne přístroj používat. Uživatel musí dodržet všechna příslušná a požadovaná
opatření. ”Bezpečnostní upozornění pro vakuové přístroje”.

page 4 of 67
DA
Bemærk: Denne manual foreligger ikke på alle EU sprog. Brugeren må ikke be-
tjene apparatet hvis manualen ikke er forstået. I det tilfælde skal en teknisk korrekt
oversættelse af hele manual stilles til rådighed. Manual skal være gennemlæst og
forstået før apparatet betjenes og alle nødvendige forholdsregler skal tages.
»Sikkerhedsregler for vakuumudstyr«
EE
Tähelepanu! Käesolev kasutusjuhend ei ole kõigis EL keeltes saadaval. Kasutaja
ei tohi seadet käsitseda, kui ta ei saa kasutusjuhendist aru. Sel juhul peab saadaval
olema kogu kasutusjuhendi tehniliselt korrektne tõlge. Enne seadme kasutamist tu-
leb kogu juhend läbi lugeda, see peab olema arusaadav ning kõik nõutud meetmed
peavad olema rakendatud. ”Ohutusnõuded vaakumseadmetele”
ES
Atención: Este manual no está disponible en todos los idiomas de UE. El usuario
no debe manejar el instrumento si no entiende este manual. En este caso se debe
disponer de una traducción técnicamente correcta del manual completo. El manual
debe ser leído y entendido completamente y deben aplicarse todas las medidas
de seguridad antes de manejar el instrumento. ”Notas sobre la seguridad para
equipos de vacío”
FI
Huomio: Tämä käyttöohje ei ole saatavilla kaikilla EU: n kielillä. Käyttäjä ei saa käyt-
tää laitetta, jos hän ei ymmärrä tätä ohjekirjaa. Tässä tapauksessa on saatavilla ol-
tava teknisesti oikein tehty ja täydellinen ohjekirjan käännös. Ennen laitteen käyttöä
on ohjekirja luettava ja ymmärrettävä kokonaan sekä suoritettava kaikki tarvittavat
valmistelut ja muut toimenpiteet. ”Vakuumilaitteen turvallisuustiedot”
GR
Προσοχή! : Οι οδηγίες αυτές δεν είναι διαθέσιµες σε όλες τις γλώσσες της Ευρω-
παϊκής Ένωσης. Ο χρήστης δεν πρέπει να θέσει σε λειτουργία την συσκευή αν δεν
κατανοήσει πλήρως τις οδηγίες αυτές. Σε τέτοια περίπτωση ο χρήστης πρέπει να
προµηθευτεί ακριßή µετάφραση του ßιßλίου οδηγιών. Ο χρήστης πρέπει να διαßά-
σει και να κατανοήσει πλήρως τις οδηγίες χρήσης και να λάßει όλα τα απαραίτητα
µέτρα πριν θέσει σε λειτουργία την συσκευή. ”Υποδείξεις ασφάλειας για αντλίες
κενού”
HR
Pažnja:ove upute ne postoje na svim jezicima Europske Unije. Korisnik nemora ra-
diti sa aparatom ako ne razumije ove upute.U tom slucaju tehnicki ispravni prijevod
cijelih uputstava mora biti na raspolaganju. Uputstva moraju biti cijela procitana i
razumljiva prije rada sa aparatom i sve zahtijevane mjere moraju biti primjenjene.
”Sigurnosne napomene za vakuumske uređaje”

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HU
Figyelem! Ez a kezelési utasítás nem áll rendelkezésre az EU összes nyelvén.
Ha a felhasználó nem érti jelen használati utasítás szövegét, nem üzemeltetheti a
készüléket. Ez esetben a teljes gépkönyv fordításáról gondoskodni kell. Üzembe
helyezés előtt a kezelőnek végig kell olvasnia, meg kell értenie azt, továbbá az
üzemeltetéshez szükséges összes mérést el kell végeznie. ”A vákuum-készü-
lékekkel kapcsolatos biztonsági tudnivalók”
IT
Attenzione: Questo manuale non è disponibile in tutte le lingue della Comunità Eu-
ropea (CE). L‘utilizzatore non deve operare con lo strumento se non comprende
questo manuale. In questo caso deve essere resa disponibile una traduzione tec-
nicamente corretta del manuale completo. Il manuale deve essere completamente
letto e compreso prima di operare con lo strumento e devono essere applicati tutti
gli accorgimenti richiesti. ”Istruzioni di sicurezza per apparecchi a vuoto”
JP
注意：この取扱説明書はすべての言語で利用可能ではありません。 もしこの取扱
説明書を理解できないならば、ユーザーは装置を操作してはなりません。 この場
合、技術的に正しい翻訳がなされた完全なマニュアルを用意しなければなりませ
ん。 装置を作動する前にマニュアルを完全に読み、そして理解されなくてはなり
ません。そして、すべての要求される対策を講じなければなりません。
真空装置を安全に取り扱うために
KR
주의 : 이 매뉴얼은 모든 언어로 번역되지는 않습니다. 만약 이 매뉴얼의 내용을 충분
히 인지하지 못했다면 기기를 작동하지 마십시오. 매뉴얼의 내용을 기술적으로 정확
하게 번역한 경우에 이용하십시오. 기기를 사용하기 전에 이 매뉴얼을 충분히 읽고
이해하고 모든 요구되는 사항들을 적용해야 합니다.
진공 장비에 대한 안전 정보
LT
Dėmesio: šis vadovas nėra pateikiamas visomis ES kalbomis. Naudotojui drau-
džiama eksploatuoti įtaisą, jeigu jis nesupranta šio vadovo. Tokiu atveju reikia turėti
viso vadovo techniškai taisyklingą vertimą. Vadovą būtina visą perskaityti ir suprasti
pateikiamas instrukcijas prieš pradedant eksploatuoti įtaisą, bei imtis visų reikiamų
priemonių. ”Vakuuminės įrangos saugos informacija”
LV
Uzmanību: Lietotāja instrukcija nav pieejama visās ES valodās. Lietotājs nedrīkst
lietot iekārtu, ja viņš nesaprot lietotāja instrukcijā rakstīto. Šādā gadījumā, ir ne-
pieciešams nodrošināt tehniski pareizu visas lietotāja instrukcijas tulkojumu. Pirms
sākt lietot iekārtu, un, lai izpildītu visas nepieciešamās prasības, iekārtas lietotāja
instrukcija ir pilnībā jāizlasa un jāsaprot. ”Vakuuma iekārtu drošības noteikumi”

page 6 of 67
NL
Attentie: Deze gebruiksaanwijzing is niet in alle talen van de EU verkrijgbaar. De
gebruiker moet niet met dit apparaat gaan werken als voor hem/haar de gebruiks-
aanwijzing niet voldoende duidelijk is. Bij gebruik van deze apparatuur is het nood-
zakelijk een technisch correcte vertaling van de complete gebruiksaanwijzing te
hebben. Voor het in gebruik nemen van het apparaat moet de gebruiksaanwijzing
volledig gelezen en duidelijk zijn en dienen alle benodigde maatregelen te zijn ge-
nomen. ”Veiligheidsvoorschriften voor vacuümapparaten”
PL
Uwaga!! Ta instrukcja nie jest dostępna we wszystkich językach Unii Europejskiej.
Użytkownik nie może rozpocząć pracy z urządzeniem dopóki nie przeczytał instruk-
cji i nie jest pewien wszystkich informacji w niej zawartych. Instrukcja musi byc w
całości przeczytana i zrozumiana przed podjęciem pracy z urządzeniem oraz nale-
ży podjąć wszystkie niezbędne kroki związane z prawidłowym uzytkowaniem.
”Wskazówki bezpieczeństwa do urządzeń próżniowych”
PT
Atenção: Este manual não está disponível em todas as línguas da UE. O usuário
não deve utilizar o dispositivo, se não entender este manual. Neste caso, uma tra-
dução tecnicamente correta do manual completo tem de estar disponível. O manu-
al deve ser lido e entendido completamente antes da utilização do equipamento e
todas as medidas necessárias devem ser aplicadas. ”Informação de Segurança
para Equipamento que funciona a Vácuo”
RO
Atentie: Acest manual nu este disponibil in toate limbile EU. Utilizatorul nu trebuie
sa lucreze cu aparatul daca daca nu intelege manualul. Astfel, va 󰘰 disponibile o
traducere corecta si completa a manualului. Manualul trebuie citit si inteles in intre-
gime inainte de a lucra cu aparatul si a luat toate masurile care se impun.
”Instrucţiuni de siguranţă pentru aparatele de vidare”
RU
Внимание: Эта инструкция по эксплуатации не имеется на всех языках. Потре-
бителю не дозволенно эксплуатировать данный прибор, если он не понимает
эту инструкцию. В этом случае нужен технически правильный перевод полной
инструкции. Прежде чем использовать этот прибор,
необходимо полностью прочитать и понять эту инструкцию и принять все не-
обходимые меры. ”Указания по технике безопасности при работе с ваку-
умными устройствами”

page 7 of 67
SE
Varning: Denna instruktion är inte tillgänglig på alla språk inom EU. Användaren får
inte starta utrustningen om hon/han inte förstår denna instruktion. Om så är fallet
måste en tekniskt korrekt instruktion göras tillgänglig. Instruktionen måste läsas och
förstås helt före utrustningen tas i drift och nödvändiga åtgärder göres.
”Säkerhetsinformation för vakuumutrustning”
SI
Pozor: Ta navodila niso na voljo v vseh jezikih EU. Uporabnik ne sme upravljati
z napravo, če ne razume teh navodil. V primeru nerazumljivosti mora biti na voljo
tehnično pravilen prevod. Navodila se morajo prebrati in razumeti pred uporaba
naprave, opravljene pa moraja biti tudi vse potrebne meritve.
”Varnostni nasveti za vakuumske naprave”
SK
Upozornenie: Tento manuál nie je k dispozícii vo všetkých jazykoch EÚ. Užívateľ
nesmie obsluhovať zariadenie, pokiaľ nerozumie tomuto manuálu. V takomto prípa-
de musí byť k dispozícii technicky správny preklad celého manuálu. Pred obsluhou
zariadenia je potrebné si prečítať celý manuál a porozumieť mu, a musia byť prijaté
všetky opatrenia. ”Bezpečnostné pokyny pre vákuové zariadenia”
TR
Dikkat : Bu kullanım kitabı, tüm dillerde mevcut değildir. Kullanıcı, bu kullanım kita-
bını anlayamadıysa cihazı çalıştırmamalıdır. Bu durumda, komple kullanım kitabı-
nın, teknik olarak düzgün çevirisinin bulunması gerekir. Cihazın çalıştırılmasından
önce kullanım kitabının komple okunması ve anlaşılması ve tüm gerekli ölçümlerin
uygulanması gerekir. ”Vakumlu cihazlar için güvenlik uyarıları”

page 8 of 67
Contents
Safety information!............................................................. 9
Important information! ......................................................................... 9
General information............................................................................11
Intended use.......................................................................................11
Setting up and installing the equipment ............................................ 12
Ambient conditions............................................................................ 14
Operating conditions ......................................................................... 15
Safety during operation ..................................................................... 16
Maintenance and repair..................................................................... 19
Additional safety information for ME 4R NT ..................................... 20
Important information: Equipment marking (ATEX) ..................... 22
Technical data................................................................... 24
General technical data valid for all pumps ........................................ 24
Gas inlet temperatures..................................................................... 24
Wetted parts..................................................................................... 30
Abbreviations.................................................................................... 31
Pump parts....................................................................................... 32
Use and operation ............................................................ 38
Installing a pump in a vacuum system .............................................. 38
During operation................................................................................ 42
Shutdown & storage.......................................................................... 44
Accessories ...................................................................... 45
Troubleshooting ............................................................... 46
Replacing diaphragms and valves.................................. 48
Cleaning and inspecting the pump heads ........................................ 50
Replacing the diaphragm ................................................................. 52
Assembling the pump heads ............................................................ 55
Assembling ttings (ME 4(R, S) NT, MZ 2(D, S) NT, MD 4CRL NT) .......... 56
Replacing the fuse............................................................................ 58
Notes on return to the factory......................................... 59
Warranty ............................................................................ 62
EC Declaration of Conformity of the Machinery ............... 64

page 9 of 67
Safety information!
Important information!
+ Keep this manual complete and accessible to per-
sonnel at all times!
+ Read this manual carefully before installing or op-
erating the equipment. Observe the instructions
contained in this manual.
+ Do not modify the equipment without authoriza-
tion.
This manual is an integral part of the equipment de-
scribed therein. It describes the safe and proper use
of the vacuum pump.
Make operating personnel aware of dangers arising
from the pump and the pumped substances.
VACUUBRAND disclaims any liability for inappropri-
ate use of these pumps and for damage from failure
to follow instructions contained in this manual.
This manual is only to be used and distributed in its com-
plete and original form. It is strictly the users’ responsibility
to check carefully the validity of this manual with respect
to his product.
Manual-no.: 999155 / 05/25/2012
The following signal word panels and safety
symbols are used throughout this manual:
This is the safety alert symbol. It is used to alert you to po-
tential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury and death.
NOTICE

page 10 of 67
➨DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
+WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
• CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to per-
sonal injury.
Caution! Hot surface!
Disconnect equipment from AC power.
NOTICE
Formatting used in this manual:
Note: The signal word panels in all sections of this manual always refer
to all paragraphs of the same format (➨/ + / • / plain text) following each
signal word panel.
The document ”Safety information for vacuum equipment” is
part of this manual! Read the ”Safety information for vacuum
equipment” and observe the instructions contained therein!

page 11 of 67
General information
Remove all packing material from the packing box. Re-
move the product from its packing-box and retain all pack-
aging until the equipment is inspected and tested. Re-
move the protective caps from the inlet and outlet ports
and retain for future use. Inspect the equipment promptly
and carefully.
If the equipment is damaged, notify the supplier and the
carrier in writing within three days. Retain all packing ma-
terial for inspection. State the item number of the product
together with the order number and the supplier’s invoice
number. Failure to check and give notice of damage will
void any and all warranty claims for those deciencies.
Replace the protective caps, if the equipment is not used
immediately. Store the equipment in dry and non-corrosive
conditions (see also “Technical data”, pg. 24).
+Do not use any damaged equipment.
• Use the mounted handle when moving the pump.
Intended use
+Do not use the pump or any system parts on humans
or animals.
+Prevent any part of the human body from coming into
contact with vacuum.
+Ensure that the individual components are only con-
nected, combined and operated according to their de-
sign and as indicated in the instructions for use.
+Comply with all notes on correct vacuum and electri-
cal connections; see section “Use and operation”, pg.
38.
+Do not use the pump to generate pressure.
+ The pumps are designed for ambient temperatures
during operation between +50°F and +104°F (+10°C
NOTICE

page 12 of 67
and +40°C). Periodically check maximum temperatures
if installing the pump in a cabinet or a housing. Make
sure ventilation is adequate to maintain recommended
operating temperature. Install an external automatic
ventilation system if necessary. If pumping hot process
gases, make sure that the maximum permitted gas in-
let temperature is not exceeded. The maximum permit-
ted gas inlet temperature depends on several param-
eters like inlet pressure and ambient temperature (see
“Technical data”, pg. 24).
+ Do not aspirate particles and dust.
+ Do not pump liquids.
• Ensure that the pump is chemically resistant to the
pumped substances prior to operation.
Use the equipment only as intended, that is, for genera-
tion of vacuum in vessels designed for that purpose. Any
other use will automatically invalidate all warranty and li-
ability claims. Remain aware of safety and risks.
Setting up and installing the equipment
➨Equipment must be connected only to a suitable elec-
trical supply and a suitable ground point. As such,
the plug must be plugged into an outlet that is properly
grounded. Failure to connect the motor to ground may
result in deadly electrical shock.
The supply cable may be tted with a molded Euro-
pean IEC plug or a plug suitable for your local electrical
supply. The cable contains wires color coded as fol-
lows: green or green and yellow: ground; blue or white:
neutral; brown or black: hot.
+Due to the high compression ratio, the pump may gen-
erate overpressure at the outlet. Check pressure com-
patibility with system components (e.g., exhaust pipe-
line or exhaust valve) at the outlet.
NOTICE

page 13 of 67
+Do not permit any uncontrolled pressurizing. Make
sure that the exhaust pipeline cannot become blocked.
If there is an exhaust isolation valve, make sure that you
cannot operate the equipment with the valve closed to
avoid a risk of bursting!
+Always provide a free and pressureless exhaust outlet
to avoid damage to pump valves and risk of bursting.
+Keep the electrical power cord away from heated sur-
faces.
• Provide a rm, level platform for the equipment. Check
that the system which you are going to evacuate is
mechanically stable. Check that all ttings are secure.
Ensure a stable position of the pump without any me-
chanical contact other than the pump feet.
• Comply with maximum permissible pressures at in-
let and outlet and with maximum permissible pres-
sure differences between inlet and outlet. See section
“Technical data”, pg. 24. Do not operate the pump
with overpressure at the inlet.
• Avoid overpressure of more than 17.5 psi absolute (1.2
bar absolute) in the event that inert gas is connected to
the pump, or to a venting valve.
• Note: Flexible elements will shrink when evacuated.
• Connect hoses gas tight at inlet and outlet of the pump.
• Ensure that no foreign objects can be drawn into the
pump.
• Check the power source and the pump’s rating plate
to be sure that the power source and the equipment
match in voltage, phase, and frequency.
• On pumps with a dual-voltage motor, check that the
voltage selection switch is set correctly. Do not change
the setting of the voltage selection switch while the
pump is connected to AC power. Unplug the pump be-
fore setting the voltage selection switch. Note: If the
pump is switched on with wrong voltage selection, the
motor may be damaged!

page 14 of 67
Keep a minimum distance of 8 in (20 cm) between the
cooling fan and surrounding items (e.g., housing, walls,
etc.). Check fan regularly for dust/dirt. Clean fan guard
grill if necessary to avoid a reduction of ventilation.
Use only hoses at the inlet and outlet of the pump with
an inner diameter at least as large as the diameter of the
pump’s tubing (to avoid overpressure at the outlet, and
reduction of pumping speed at the inlet).
Allow the equipment to equilibrate to ambient temperature
if you bring it from cold environment into a room prior to
operation. Notice if there is water condensation on cold
surfaces.
Comply with all applicable and relevant safety require-
ments (regulations and guidelines). Implement the re-
quired actions and adopt suitable safety measures.
Ambient conditions
➨Do not reach for this product if it has fallen into liquid.
There is a risk of deadly electrical shock. Unplug the
system immediately.
+Do not use this product in an area where it can fall or
be pulled into water or other liquids.
+ Pay attention to the maximum permissible ambient
and gas inlet temperatures (see “Technical data”, pg.
24).
• Adopt suitable measures in case of differences from
recommended conditions, e.g., using the equipment
outdoors, installation in altitudes of more than 6500 ft
(2000 m) above mean sea level, conductive pollution or
external condensation on the pump.
• Do not operate this product near ames.
NOTICE

page 15 of 67
To the best of our knowledge the equipment is in com-
pliance with the requirements of the applicable EC-direc-
tives and harmonized standards (see ”Declaration of Con-
formity”) with regard to design, type and model. Directive
EN 61010-1 gives in detail the conditions under which the
equipment can be operated safely (see also IP degree of
protection, “Technical data”, pg. 24).
Operating conditions
➨These pumps are not approved for operation in po-
tentially explosive atmospheres. Do not operate the
pumps in potentially explosive atmospheres.
➨Pumps without the ”`” mark on the rating plate are
not approved for the pumping of potentially explo-
sive atmospheres. Do not pump potentially explo-
sive atmospheres with those pumps.
➨Pumps bearing the ”`” mark on their rating plates
are approved for the pumping of potentially ex-
plosive atmospheres according to their classica-
tion II 3G IIC T3 X according to ATEX, but they are
not approved for operation in potentially explosive
atmospheres (see section “`Important information:
Equipment marking (ATEX)”, pg. 22).
➨The pumps are not suitable to pump any of the sub-
stances listed below.
Do not pump:
- unstable substances
- substances which react explosively under impact
(mechanical stress) without air
- substances which react explosively when being ex-
posed to elevated temperatures without air,
- substances subject to auto-ignition,
- substances which are inammable without air
- explosive substances.
➨ The pumps are not approved for operation below
ground. Do not operate the pump below ground.
NOTICE

page 16 of 67
+ The pumps are not suitable for pumping dust.
Do not pump dust.
• Do not pump substances which may form deposits in-
side the pump. The pumps are not suitable for pumping
substances which may form deposits inside the pump.
Deposits and condensate in the pump may lead to in-
creased temperatures even to the point of exceeding
the maximum permitted temperatures.
• Check the inlet and outlet of the pump, if there is a dan-
ger of forming deposits inside the pump, e.g., in the
pump chambers (the pump chamber is the part between
diaphragm and head cover. See section “Replacing
diaphragms and valves”, pg. 48). Inspect the pump
chambers regularly and clean if necessary.
• Consider interactions and chemical reactions of
the pumped media. Ensure that the materials of the
pump’s wetted parts are compatible with the pumped
substances, see section “Technical data”, pg. 24.
When changing the substances pumped, we recom-
mend purging the pump with air or inert gas prior to
changing the pumped media. Purging the pump will
pump out residues and it will reduce the possibility of
reactions of the pumped substances with each other
and with the pump’s materials.
Safety during operation
➨Adopt suitable measures to prevent the release of dan-
gerous, toxic, explosive, corrosive, noxious or polluting
uids, vapors and gases. To prevent any emission of
such substances from the pump outlet, install an ap-
propriate collecting and disposal system and take pro-
tective action for pump and environment.
➨You must take suitable precautions to prevent any for-
mation of explosive mixtures in the pump chamber or
at the outlet of the pump. In case, e.g., of a diaphragm

page 17 of 67
failure, mechanically generated sparks, hot surfaces or
static electricity may ignite these mixtures. Use inert
gas for venting, if necessary.
➨Drain appropriately or otherwise remove any potentially
explosive mixtures at the outlet of the pump, or dilute
them with inert gas to non-explosive concentrations.
➨ Never operate this pump if it has a damaged cord or
plug.
+If the pump is not working properly, has been dropped
or has fallen into water, contact your pump service pro-
vider.
+Prevent any part of the human body from coming into
contact with vacuum.
+ Never aspirate liquids or dust into the pump.
+ Make sure that the exhaust pipeline cannot become
blocked.
+Comply with applicable regulations when disposing of
chemicals. Take into consideration that chemicals may
be contaminated. Take adequate precautions to pro-
tect people from the effects of dangerous substances
(chemicals, thermal decomposition products of uo-
roelastomers). Use appropriate protective clothing and
safety goggles.
+Use only original manufacturer’s spare parts and
accessories. Otherwise the safety and performance of
the equipment, as well as the electromagnetic compat-
ibility of the equipment might be reduced.
The CE mark or the cTÜVus mark may be voided if not
using original manufacturer’s spare parts.
+Interruption of the pump (e.g., due to power failure),
failure of connected components or of parts of the sup-
ply, or change in parameters must not be allowed to

page 18 of 67
lead to dangerous conditions. In case of a diaphragm
failure or in case of a leak in the manifold, pumped sub-
stances might be released into the environment or into
the pump housing or motor.
Comply with all notes regarding proper use of the pumps,
as well as operation and maintenance guidance.
+The residual leak rate of the equipment might render
possible an exchange of gas, albeit extremely slight,
between the environment and the vacuum system.
Adopt suitable measures to prevent contamination of
the pumped substances or the environment.
• Ensure that no parts of your clothing, hair or ngers can
be caught or drawn in at the inlet of the pump. Never
insert ngers or drop any other object into the inlet or
outlet.
• Pay attention to the safety symbol ”hot surfaces” on
the equipment. Hot parts may cause burns if touched.
Adopt suitable measures to prevent any danger arising
from hot surfaces or electric sparks. Ensure that hot
surfaces of the pump do not cause burns. Provide a
suitable contact guard if necessary.
Do not start the pump if the pressure difference between
inlet and outlet exceeds 16 psi (1.1 bar) at maximum.
Prevent the backpressure of gases and the backow of
condensates at the outlet.
Provide appropriate protective measures to allow for the
possibility of failure and malfunction. The protective mea-
sures must also allow for the requirements of the respec-
tive application.
In case of overload, the motor is shut down by a self-hold
thermal cutout in the winding.
Note: Only manual reset is possible. Switch off the pump
and disconnect from the power source. Identify and elimi-
nate the cause of failure. Wait approx. ve minutes before
NOTICE

page 19 of 67
restarting the pump.
• Note: In case of supply voltage below 100V, the lock
of the cutout might be impaired and the pump may
restart on its own after sufcient cooling down. Take
appropriate precautions, if an automatic restart of the
pump may lead to a dangerous situation (e.g., switch
off the pump and disconnect from the power source).
Maintenance and repair
In order to comply with laws (occupational, health and
safety regulations, safety at work law and regulations for
environmental protection) vacuum pumps, components
and measuring instruments can only be returned when
certain procedures (see section “Notes on return to the
factory”, pg. 59) are followed.
Take advantage of our service seminars, which put special
focus on the maintenance and repair of vacuum pumps.
For details and for the online ”Instructions for repair” man-
ual see www.vacuubrand.com.
In case of normal wear, the lifetime of the diaphragms
and valves is > 10000 operating hours. Bearings have a
typical durability of 40000 h. Motor capacitors have a typi-
cal durability in the range of 10000 to 40000 h depending
strongly on operation conditions including ambient tem-
perature, humidity or load.
➨Ensure that the pump cannot be operated acciden-
tally. Never operate the pump if covers or other
parts of the pump are disassembled.
➨Switch off the pump. Disconnect the electrical pow-
er cord and wait two minutes before starting mainte-
nance to allow the capacitors to discharge.
NOTICE

page 20 of 67
➨Note: The pump may be contaminated with process
chemicals, which have been pumped during operation.
Ensure that the pump is completely decontaminated
before maintenance commences.
+ Take adequate precautions to protect people from the
effects of dangerous substances if contamination has
occurred. Use appropriate protective clothing, safety
goggles and protective gloves.
+ Wear parts have to be replaced regularly.
+ Never operate a defective or damaged pump.
+Check every motor capacitor regularly by measuring
its capacity and estimating its time in operation. Re-
place old capacitors early enough to prevent a failure in
operation. If an old motor capacitor fails, the capacitor
may get hot. It may even melt or emit a ame, which
could be dangerous for persons and equipment in
the vicinity. The capacitors have to be replaced by an
electrician.
+Vent the pump before starting maintenance. Isolate the
pump and other components from the vacuum system.
Allow sufcient cooling of the pump. Drain condensate,
if applicable.
Ensure that maintenance is done only by suitably trained
and supervised technicians. Ensure that the maintenance
technician is familiar with the safety procedures which re-
late to the products processed by the pumping system.
Only dismantle the pump as far as necessary.
Additional safety information for ME 4R NT
Intended use
+Comply with all notes on how to connect the ME 4R NT
correctly to vacuum and pressure systems; see section
NOTICE