meter FME to the PLC. Status of the system depends on the alarm
function set by user (factory setting: None, system continues
running with an alarm). Dilution improves the screws functionning,
especially when sucking corrosive gases.
–
the nitrogen is used as sealing gas. The nitrogen is injected into the
intermediate chamber (5) in the cover of the cylinder NS pump to
achieve good closeness.
–
the nitrogen can also be used as flushing gas. Depending on the
application, flushing is recommended after every use to ensure
troublefree operation of the vacuum system. The nitrogen is
injected directly into the intake port. In the absence of nitrogen
flushing can also be performed with the help of air.
Optional functions/ Use of available
accessories
The LCD controller processes the data of the sensors (see chapter
“Communication with the equipment”) as follows:
–
temperature in the cylinder (option)
–
Current DP and MB
–
nitrogen flow rate
–
cooling water flow rate
–
oil temperature
–
control of the cooling liquid flow
–
cooling liquid temperature and flow
–
exhaust pressure (option)
An horizontal silencer under the pump or a vertical silencer (option) at
the exhaust reduces the noise of the vacuum system and collects any
condensate.
The data process with the C.M.S. (Central Monitoring System)
(accessory) has the same function as the LCD controller (see Operating
Instructions of Central Monitoring System).
A temperature sensor PT100 (10) (option) mounted on the cylinder,
measures the temperature inside the cylinder.
The safety valve (SV) prevents excessively high pressure in the expan-
sion tank (EV), relief pressure: 6 bar (option).
A pressure switch (optional) with normally closed contact mounted in
the expansion tank monitors the pressure of the cooling liquid. It must
be connected in such a way that actuation causes the vacuum system
to be switched off.
A leak-protection non-return valve (option) at the exhaust traps the
condensate in the vacuum system when the vacuum system is switched
off.
On/ Off switch
The on/ off switch function is realised by the LCD. The vacuum pump
is delivered with a circuit breaker.
Safety
Intended use
DEFINITION
: To rule out any misunderstanding, the term “handling”
of the vacuum system covers transport, storage, installation and opera-
tion of the vacuum system as well as effects on operating states and
troubleshooting on the vacuum system.
The vacuum system is intended for industrial use. It may only be oper-
ated by qualified personnel.
The different application possibilities and limit values for operation de-
scribed in “Product description” and “Installation requirements” must
be observed by the manufacturer of the vacuum system into which the
vacuum system is to be integrated and by users.
The need for personal safety regulations depends in principle on the
type of use. The operator must provide the users with the necessary
means and must inform his personnel about the dangers emanating
from the processed product.
The operator of the vacuum system must observe the safety regula-
tions and must train and instruct his personnel accordingly.
Local regulations regarding the motors and electric control elements
must be observed when installing the vacuum system in potentially
explosive environments.
The maintenance instructions must be followed and observed.
These installation and maintenance instructions must be read and
understood before the vacuum system is used. If you have any doubts,
contact your Busch representative.
Safety information
The vacuum system is designed and manufactured in compliance with
the latest technical standards and safety regulations. Nevertheless an
element of residual risk remains.
Various safety instructions are to be found in this handbook and on the
vacuum system. These instructions must be followed. You can reco-
gnise these instructions by the signal words DANGER, WARNING and
CAUTION, which are defined as follows:
DANGER
Disregard of this safety instruction will always result in death,
serious injuries or severe damage.
WARNING
Disregard of this safety instruction may result in death, serious in-
juries or severe damage.
CAUTION
Disregard of this safety instruction may result in minor or moderate
injuries or damage.
COBRA DS 8163 A
Safety
0870772605
Page 11
Summary of Contents for COBRA DS 8163 A
Page 34: ......
