BUSCH Seco SG 0008 A, Installation And Operating Instructions Manual

Page: 7 / 20

Seco SG 0008 A
0870162612 /
190709
page 7
Adjusting the Bypass Valve
The difference pressure of the vacuum pump can be adjusted between
100 mbar and 250 mbar. Adjust the difference pressure as described
below.
•
Remove the cap (f1)
•
Turn the bolt (f2) left to increase the difference pressure and turn
the bolt (f2) right to reduce the difference pressure
Note : Do not use force to turn the bolt (f2). The rotation of the
bolt (f2) is limited by a stopping mechanism.
•
Close the bypass valve with the cap (f1)
Connecting Lines/Pipes
•
Connect the suction line
•
Connect the discharge line
•
Check the pipe connections for possible leak
Recording of Operational Parameters
As soon as the vacuum pump is operated under normal operating con-
ditions:
•
Measure the drive motor current and record it as reference for
future maintenance and troubleshooting work
Operating Notes
Use
The vacuum pump is intended for
−
the suction
of
−
potentially explosive fuel-air mixtures according to the EC-Type-
Examination Certificate.
Conveying media with a lower or higher density than air leads to an
increased thermal and/or mechanical load on the vacuum pump and is
permissible only after prior consultation with Busch.
Max. allowed temperature range of the inlet gas: -30 … 50 °C
If the machine is installed at an altitude greater than 1000 meters above
sea level:
♦
Contact your Busch representative, the motor should be de-
rated or the ambient temperature limited.
The vacuum pump is thermally suitable for continuous operation (100
percent duty).
In case of intermittent operation (S3) observe the max. permissible
number of startings per hour: 60
According to the directive 2014/34/EU the vacuum pump is made for
the intended use in potentially explosive areas.
According to this directive the vacuum pump is inside a category 1 de-
vice (suitable for connection to tubings the inside of which is classified
as zone 0). Outside the vacuum pump is approved as category 2 device
(for use in zone 1).
According to the EC-Type-Examination Certificate issued by the
German "Physikalisch-Technische Bundesanstalt" (PTB) the vacuum
pump may be used for the conveyance of explosive atmospheres con-
sisting of a mixture with air and flammable gases, provided that the
gases belongs to the temperature classes T1 to T3 and to the explo-
sion groups IIA according to EN ISO 80079-36.
The vacuum pump is suitable for placement in an environment where
potentially explosive atmosphere as mixture out of air and flammable
gases, vapors or mists likely to occur in normal operation occasionally
(zone 1) provided that the gases belongs to the temperature classes T1
to T3 and to the explosion groups IIA according to EN ISO 80079-36.
The approval for use in potentially explosive atmospheres is valid for
the vacuum pump together with the described measurement and
safety equipment. The approval is void if the system is altered or if the
scheduled maintenance is not complied with. Maintenance must be
performed by specifically instructed personnel only.
•
Make sure that protective devices will not be disabled
•
Make sure that the installation prerequisites (
➔
page 5: Installa-
tion Prerequisites) are complied with and will remain complied
with, particularly that a sufficient cooling will be ensured
WARNING
The vacuum pump is designed for operation under the conditions
described below.
In case of disregard risk of explosion!
The vacuum pump must only be operated under the conditions
described below.
WARNING
Operating a faulty vacuum pump puts the explosion safety at
risk.
Risk of explosion!
The vacuum pump must only be operated in faultless condition.
A faulty vacuum pump must immediately be removed from ser-
vice.
CAUTION
During operation the surface of the vacuum pump may reach
temperatures of more than 70 °C.
Risk of burns!
The vacuum pump shall be protected against contact during oper-
ation, it shall cool down prior to a required contact or heat protec-
tion gloves shall be worn.