Elmo Rietschle L-BL2 - Manual (Page 21)

Operation
© Gardner Denver Deutschland GmbH 21 / 36 610.44444.40.000
7 Operation
Start-up and shut-down in normal operation is
identical to the procedure for commissioning.
 WARNING
Improper use of the system can result in
serious or even fatal injuries!!
Have you read the safety precautions in
Chapter 1, "Safety", Pg. 4 f.?
Otherwise you may not carry out any work with
or on the system!
Also be sure to read the safety precautions in
Chapter 6, "Commissioning", Pg. 20!
NOTE
For the system design, see Fig. 1, Pg. 3. The
item numbers (Item) specified in the text refer
to this illustration.
7.1
Start-up and shut-down
See:
 Chapter 6.1, "Preparation and start-up",
Pg. 20.
 Chapter 6.2, "Shut-down", Pg. 20.
7.2
Operation within the process
Continuous operation at maximum
vacuum/minimum inlet pressure (with the inlet
valve closed) is possible. The power
consumption of the system is at its lowest in this
case.
In case of no-load operation we recommend
operation at minimum inlet pressure (lowest
power consumption).
The following applies to models 2BL2 041 - 2BL2
141:
during operation at low inlet pressures
(
 20 kPa abs. [2.90 psia]), the pumping capacity
of the system can be increased by switching over
the 3-way valve (Fig. 1, Pg. 3, Item G) to the
HIGH VACUUM position.
(Also see Fig. 12, Pg. 21).
During operation at inlet pressures  20 kPa abs.
[2.90 psia], this valve position can lead to the
formation of splash water on the exhaust-air
connection.
Switchover is not required for the models 2BL2
251 - 2BL2 341.
Position
STANDARD
Position
HIGH VACUUM
Fig. 12: 3-way valve (only 2BL2 041 - 141)
7.2.1
Loss of operating liquid
At a low humidity and a high inlet pressure
(> 35 kPa abs. [5.08 psia]), the water vapour
content in the escaping gases is slightly above
that of the gases sucked in. This results in a
slight loss of operating liquid.
NOTICE
Check the operating-liquid level in the
separator regularly by means of the level
indicator!
NOTICE
Do not operate the system with the operating
liquid level with the pointer in the 0 position!
Liquid level with pointer in 0 position:
At a liquid level with the pointer in the 0
position
, the pumping capacity of the system will
be reduced. During longer operation under these
conditions, this leads to a dip in the vacuum and
may ultimately result in the system running dry!
When the pointer is in the 0 position (minimum),
take the following measures:
 Interrupt system operation.
See Chapter 6.2, "Shut-down", Pg. 20.
 Pour operating liquid into the separator via the
filling opening (up to pointer position 1 (lower
edge of the filling opening)).