Richter V&A RMI Series, Инструкция по установке и эксплуатации

Страница: 13 / 36

Series RMI
Page 13
9430-050-en Revision 00
TM 9886 Edition 03/2018
5.6 Monitoring facilities
Appropriate monitoring facilities are to be
recommended, depending on the require-
ments placed on operational safety and
availability of the unit.
Richter provides information on request and can sup-
ply:
♦ Flow meters
♦ Filling level indicators
♦ Motor load monitors
You can obtain the publications "Safe Operation of
Magnetic Drive Pumps" and "The Operation of
Centrifugal Pumps without NPSH Problems" on
request.
5.7 Drive
The power consumption of the pump at the operating
design point is specified in the data sheet and works
certificate. If the operating design point was not
known when the pump was dispatched, the power
consumption can be read off the appropriate perfor-
mance curves. The max. density, the max. viscosity
and a safety margin are to be allowed for.
Care must be taken when selecting the motor size to
ensure that the excess power is not too great but that
the requirements acc. to DIN EN ISO 5199 are satis-
fied. During start-up the magnetic drive could other-
wise stop.
The magnetic drive rating at the pump speed is given
in the pump data sheet.
If the motor rating exceeds this magnetic drive rating
– at pump speed -, it is necessary to check for any
stoppage of the magnetic drive.
This also applies if the required drive rating exceeds
80% of the magnetic drive rating – at pump speed.
Consult Richter if necessary.
Different operating data can be achieved without
changing the pump through the use of different
speeds, e.g. by means of a frequency converter.
The pump with base plate and motor is illustrated in
the installation drawing.
The operating manual of the motor manufacturer must
be observed.
A motor with a valid ATEX certificate is to be
used if employed in zone 1 and 2.
5.8 Coupling
If one coupling half engages with the other, the claw
section is normally to be mounted on the drive shaft
and the coupling half with the smooth end face on the
motor shaft.
Observe the operating manual of the coupling manu-
facturer.
A coupling with a valid ATEX certificate is to
be used if deployed in zone 1 and 2.
Regulations exist, e.g. for the following details:
♦ Arrangement of the coupling halves
♦ Max. bore diameter
♦ Max. transmitted power
♦ Spacing of the coupling halves
♦ Maximum values for offset and
♦ angular misalignment.
Should the pump housing and motor remain on the
base plate for repair work, a spacer type coupling is
required.
5.9 Final check
Check the alignment of the coupling again in ac-
cordance with
Section 5.3
.
It must be possible to easily turn the unit at the
coupling by hand.
5.10 Coupling guard
The pump may only be operated with a coupling
guard in accordance with the accident prevention
regulations.
It must be ensured that the coupling guard
used is either made of spark-free material
or the impact test required by the EN 13463
is satisfied without any reservations.
Richter offers both versions.
The operator must ensure that, after the
coupling protection has been mounted, the
requirements of the machine guideline are
fulfilled.
5.11 Electric connection
The operator is obligated to connect the assembly in
accordance with existing regulations (IEC, VDE,
etc.).
Only have the electric connection
performed by a qualified electrician.
Compare the available mains voltage with the infor-
mation on the type plate of the motor and select a
suitable circuit.
A motor protection device (motor-circuit switch) is
urgently recommended.
Danger of explosion if the electrical
installation is incorrect.
In potentially explosive areas IEC 60079-
14 must also be observed for the electrical
installation.
If the pump is mounted on a base plate, ensuring
electrical conduction through the use of a chopper
disk or contact disk on the housing foot and support
bracket.
The assembly must be grounded in accordance with
currently effective regulations, for example, on the
base plate.