Elmo Rietschle G-BH7 Operating instructions - Manual (Page 7)

Intended Use
© Gardner Denver Deutschland GmbH 7 / 28 610.44436.40.000
2 Intended Use
These operating instructions
 apply to gas-ring vacuum pumps/compressors
of the G-BH7 series, models 2BH72, 2BH73,
2BH74, 2BH75 and 2BH76,
 contains instructions concerning transport and
handling, installation, commissioning,
operation, shut-down, storage, servicing and
disposal of the G-BH7,
 must be completely read and understood by
all operating and servicing personnel before
beginning to work with or on the G-BH7,
 must be strictly observed,
 must be available at the site of operation of
the G-BH7.
About the operating and servicing personnel of
the G-BH7
 These persons must be trained and
authorized for the work to be carried out.
 Work on electrical installations may be carried
out by trained and authorized electricians
only.
The G-BH7s
 are pump-motor units for generating vacuum
or gauge pressure;
 are used to extract, pump and compress
the following gases:
– Air,
– Non-flammable, non-aggressive, non-toxic
and non-explosive gases or gas-air
mixtures.
– For differing gases/gas-air mixtures,
inquire with the Service Department.
 are equipped with one of the following kind of
drive motors:
– 3-phase AC drive motor with a standard or
explosion-protected design
– Single-phase AC drive motor
These operating instructions apply only to
pump-motor units with a standard design.
For the explosion-protected design
, see
the separate operating instructions.
 exist in the following designs:
– single-impeller (single-stage)
– two-impeller (two-stage)
– three-impeller (three-stage)
Increased pressure differences can be
achieved with the two-impeller and three-
impeller pump-motor units.
 are intended for industrial applications,
 are primarily intended for higher pressure
conditions;
 are designed for continuous operation.
With increased switch-on frequency (at equal
intervals of approx. 5x per hour) or increased
gas entry and ambient temperature, the over
temperature of the winding and the bearings
can be exceeded.
Consultation with the Service Department is
required for operating conditions of this kind.
When operating the G-BH7, the limits listed in
Chapter 3, "Technical Data", Pg. 8 ff. must
always be complied with.
Foreseeable Misuse
It is prohibited
 to use the G-BH7 in applications other than
industrial applications unless the necessary
protection is provided on the system, e.g.
guards suitable for children's fingers;
 to use the device in rooms in which explosive
gases can occur if the G-BH7 is not expressly
intended for this purpose;
 to extract, to deliver and to compress
explosive, flammable, corrosive or toxic fluids,
unless the G-BH7 is specifically designed for
this purpose;
 to operate the G-BH7 with values other than
those specified in Chapter 3, "Technical
Data", Pg. 8 ff.
Any unauthorized modifications of the G-BH7 are
prohibited for safety reasons.
The operator is only permitted to perform the
maintenance and service work described in these
operating instructions.
Any maintenance and service work which goes
beyond this many only be performed by
companies authorized by the manufacturer
(inquire with the Service Department).