22
GA01208_002_C0 - 11/2016 - © Leybold
Installation
Safely lead the exhaust gases away
Exhaust gases may, depending on the type of application, present a
health hazard and/or may be detrimental to the environment.
The exhaust gases from the vacuum pump must be safely led away and
subjected to post-treatment as required. In order to reduce the emission
of oil vapours we recommend the installation of an additional exhaust filter
(Leybold accessory, see Section 1.5). Depending on the type of appli-
cation or the kind of pumped media, the corresponding regulations and
information sheets must be observed.
When oil mist is to be removed from the exhaust flow we recommend the
use of the exhaust filter with lubricant return (ARS) which is part of the
TRIVAC system.
The maximum intake pressure must not exceed atmospheric pressure (1013
mbar).
The pumps may be operated with an inert gas ballast via a connection which
is provided for this purpose. The cover plate (7/8) can be removed to gain
access to this M 16 x 1.5 threaded port (7/6). Matching connectors are
available (see Section 1.5).
In inlet pressure for the gas ballast should be about 1013 mbar (absolute)
and sufficient quantities of gas must be available (about
1
/
10
of the pumping
speed).
3.4 Electrical Connections
TRIVAC B pumps are supplied with three-phase motor but without
accessories for electrical connection. They must be connected via the
appropriate cable, and a suitable motor protection switch.
When operating the unit at its operational limits (at an ambient temperature of
12 °C and at undervoltage, for example) it may be necessary to protect the
electric motor against high start-up currents by installing an overload protec-
tor (Class 20 in accordance with IEC 60947, for example). Set up according
to the information provided on the motor nameplate to meet local require-
ments for the motor protection switch. The local requirements may specify
measures for reducing the start-up current (soft start, frequency controlled
start-up, for example). Set the switch in accordance with the rating on the
motor nameplate.
Please observe the diagram at the motor.
After connecting the motor and after every time you alter the wiring, check
the direction of rotation. To do so, briefly switch on the motor and check
whether a suitable cover (e. g. a blank flange) is sucked on at the intake port.
If not, interchange two phases of the connection.
Observe the direction arrow on the intermediate flange.
In the case of custom pumps please note the information provided on a
separate sheet.
CAUTION
NOTICE
