VACUUBRAND MZ 2C EX +IK+EK - Manual (Page 10)

page 10 of 75
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. manual-no.: 999128 / 29/04/2014
The motor is protected by a thermal cutout with manual reset combined with an
overcurrent protection.
☞
Avoid reliable high heat supply (e. g. due to hot process gases). Maximum per-
mitted gas and ambient temperature se ”Technical data”.
☞ Make sure ventilation is adequate especially if pump is installed in a housing or if
ambient temperature is elevated, install an external automatic ventilation system
if necessary.
☞ Ensure that in case of pumps with two motors both motors are switched on at
the same time, if not possible switch on the motor of the pump at the outlet first.
Ambient conditions
To the best of our knowledge the equipment is in compliance with the requirements
of the applicable EC-directives and harmonized standards (see ”Declaration of con-
formity”) with regard to design, type and model, especially directive EN 61010-1.
This directive gives in detail conditions, under which the equipment can be operated
safely (see also IP degree of protection).
Adopt suitable measures in case of differences, e. g. using the equipment outdoors,
installation in altitudes of more than 1000 m above mean sea level, conductive pol-
lution or dewiness.
Pay attention to the permissible maximum ambient and gas inlet temperatures
(see ”Technical data”).
Operating conditions
The pumps have a conformity according to their specification to be installed in areas
and to pump out of areas which contain under normal operation conditions occasion-
ally a potential explosive atmosphere as a mixture of air with inflammable gases or
vapours (category 2). Class of ignition and temperature see ”Technical data”.
The specification for category 2 for the outer part of the pump is only val-
id when purging the crankcase with inert gas. Without inert gas purging the
pump has the specification II 3G IIB T4 X for the outer part.
Ensure that the materials of the wetted parts are compatible with the pumped sub-
stances, see section ”Technical data”.
Attention: Never use the antistatic connection at the housing of the device to
connect the device to ground, use only the green or green and yellow connection
wire of the motor. Use the antistatic connection at the housing only to perform an
antistatic connection of other non-electronic devices and components, e. g. inlet
and outlet vacuum hoses or something similar. Never lead away short-circuit cur-
rents using this connection. External electric devices have to be connected at the
potential equalization point of the environment separately and independent of this
device.
☞ Equipment must be connected only to a suitable fused and protected electrical
supply and a suitable earth point by suitable trained personnel. Failure to connect
the motor to ground may result in deadly electrical shock.
☞ Check that mains voltage and current conform with the equipment (see rating
plate).
☞ Obey notes regarding the motor in section ”Instructions manual: Explosion
proof motors”, see below.