Elmo Rietschle G-BH7 Operating instructions - Manual (Page 18)

Installation
610.44436.40.000 18 / 28 © Gardner Denver Deutschland GmbH
5.3 Connecting pipes/hoses (vacuum
pump/compressor)
Mufflers:
The pump-motor units are delivered with mufflers
(indicated with arrows in the following
illustrations) for the inlet and discharge
connections as standard equipment.
With single-impeller pump-motor units, the
mufflers are already mounted on delivery.
Fig. 2: 2BH721 ... 2BH761 (single-impeller pump-
motor units)
With two-impeller and three-impeller pump-
motor units, the inlet-side muffler is included
loose for packaging-related reasons and must be
mounted by the operator.
Fig. 3: 2BH722 ... 2BH762 (two-impeller pump-
motor units with two-stage design)
Fig. 4: 2BH723 ... 2BH763 (three-impeller pump-
motor units with three-stage design)
 WARNING
Danger from rotating impeller:
Cutting/cutting off of 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 rotating direction of the shaft is marked
with an arrow on the face of the vacuum
pump/compressor cover and on the fan guard
(Fig. 1, Pg. 2, Item 7).
The flow 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 flow direction
arrow on the inlet and discharge connections.