Elmo Rietschle G-BH9 - Manual (Page 19)

Installation
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 WARNING
Danger from rotating impeller:
Cutting/cutting of off extremities!
The rotating impeller is accessible with the inlet
and discharge connections open!
With free entry and exit of gases, i.e. with direct
intake out of or direct feeding into the
atmosphere without piping, the following
therefore applies:
Provide the inlet and discharge connections of
the pump-motor unit either with additional
mufflers or with additional piping of a sufficient
length to prevent access to the impeller!
Connections:
To prevent foreign bodies from entering the unit,
all connections are sealed off when delivered. Do
not remove the sealing plugs until immediately
before connecting the pipes/hoses.
The following applies for the arrangement of the
pipe/hose connections:
The pumped gases are sucked in via the inlet
connection (see Chapter 5.3.1, Pg. 19) and
discharged via the discharge connection (see
Chapter 5.3.2, Pg. 19).
The shaft rotating direction is marked with an
arrow on the back of the vacuum
pump/compressor housing (Fig. 1, Pg. 2, Item 7).
The delivery direction of the gases is marked
with arrows on both connections (Fig. 1, Pg. 2,
Item 6).
 WARNING
Danger from interchanging inlet and
pressure line!
Interchanged inlet and pressure lines can lead
to damage to the pump-motor unit and the
system, and as a result of this to serious
injuries!
Make sure that the inlet and pressure line
cannot be confused when connecting.
Look for the clear marking with the arrow
indicating the delivery direction on the inlet and
discharge connections.
 WARNING
Danger due to vacuum and gauge pressure!
Danger due to escaping fluid!
During operation, connected pipes and vessels
are vacuumized or pressurized!
Use only mounting elements, connections, lines,
fittings and containers with sufficient freedom
from leaks and strength for the pressures which
occur.
Make sure that the mounting elements and
connections are mounted sufficiently firmly and
leak-free!
CAUTION
If the pumped gases are passed on on the
discharge side in a closed pipe system, then it
must be ensured that the pipe system is
adapted to the maximum discharge pressure.
See Chapter 3.3: "Operating conditions",
Section "Pressures", Pg. 11. Connect a
pressure relief valve upstream if necessary.
NOTICE
Attach pipes/hoses free of mechanical tensions.
Support the weight of the pipes/hoses.
5.3.1 Inlet
connection
The inlet connection with the related muffler
(Fig. 1, Pg. 2, Item 3) is marked with an arrow
pointing into the vacuum pump/compressor.
Connect the inlet pipe here. The pumped gases
are sucked in via this.
Procedure: see Chapter 5.3.3.
 WARNING
Danger from solid bodies and impurities in
the pump-motor unit!
If solid bodies penetrate into the pump-motor
unit, blades of the impellers can break and
broken pieces can be thrown out.
Install a filter in the inlet pipe.
Replace filter regularly!
5.3.2 Discharge
connection
The discharge connection with the related muffler
(Fig. 1, Pg. 2, Item 4) is marked with an arrow
pointing out of the vacuum pump/compressor.
Connect the discharge pipe here. The pumped
gases are discharged via this. Procedure: see
Chapter 5.3.3.