Maintenance and repair, Notice – VACUUBRAND MZ 2C NT VARIO without controller (o.C.) User Manual
Page 20
page 20 of 76
Check the liquid level in the catchpots or in the collecting
flask regularly and drain condensate in time to prevent
overfilling. Install a level sensor (see “Accessories”, pg.
46; a CVC 3000 or VNC 2 controller is required for op-
eration) for monitoring, if necessary.
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. five minutes before
restarting the pump.
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. 71) 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 typical
durability of 40000 h.
➨
Ensure that the pump cannot be operated acciden-
tally. Never operate the pump if covers or other
parts of the pump are disassembled.
NOTICE