page 20 of 88
and disconnect from the power source. Identify and elimi-
nate the cause of failure. Wait approx. five minutes before
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 sufficient 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 “Repair - Maintenance -
Return - Calibration”, pg. 80) 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-
In normal use, the lifetime of the diaphragms and valves
is typically 15,000 operating hours. Bearings have a typi-
cal 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
power cord and wait five seconds
before starting
maintenance to allow the capacitors to discharge.
➨
Note
: The pump may be contaminated with process
NOTICE
Summary of Contents for ME 2 NT
Page 34: ...page 34 of 88 ME 4 NT 1 5 3 2 6 4 ME 4 NT ME 4S NT 1 5 3 2 6 4 fig ME 4 NT ...
Page 35: ...page 35 of 88 ME 4R NT 9 5 3 6 12 8 10 11 10 4 13 MZ 2 NT MZ 2S NT fig MZ 2 NT 5 3 2 6 4 1 ...
Page 36: ...page 36 of 88 MZ 2D NT 5 3 2 6 4 ME 8 NT ME 8S NT 2 5 3 2 6 4 1 1 ...
Page 37: ...page 37 of 88 6 MD 4 NT MV 2 NT fig MD 4 NT 1 5 3 4 2 7 MV 2 NT 1 5 3 4 2 7 6 14 MD 4S NT ...
Page 38: ...page 38 of 88 MD 4CRL NT 5 3 2 7 6 14 4 1 ...
Page 61: ...page 61 of 88 4 5 6 Clean 20696877 20696860 20696861 20696862 20696868 20696859 20696870 ...
Page 62: ...page 62 of 88 7 8 9 1 2 ...
Page 64: ...page 64 of 88 12 13 14 Pay attention to washers Assemble same number and thick ness ...
Page 66: ...page 66 of 88 18 19 20 23120788 ME 8 NT MD 4 NT MV 2 NT ...
Page 67: ...page 67 of 88 21 22 23 ...
Page 70: ...page 70 of 88 1 20 17 2 3 Checking diaphragms and valves MZ 2D NT 5 4x 17 mm 20 mm ...
Page 74: ...page 74 of 88 10 size 2 1x Replacing the valves and assembling the pump heads MZ 2D NT 11 12 ...
Page 75: ...page 75 of 88 13 14 15 ...