Richter MNK Series - Manual (Page 13)

Series MNK
Page 13
9230-050-en Revision 11
TM 7903 Edition 07/2010
5.9 Final check
Check the alignment of the coupling again in
accordance 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 8 (IEC, VDE,
etc.).
Allow only a trained electrician to perform the
electrical connection.
Compare the existing mains voltage with the
indications on the motor’s manufacturer’s nameplate
and choose a suitable circuit.
A motor protection device (motor-circuit switch) is
urgently recommended.
Danger of explosion if the electrical
installation is incorrect.
In areas at risk of explosion, 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
leg.
The assembly must be grounded in accordance with
currently effective regulations, for example, on the
base plate.
6 Commissioning/Shutdown
6.1 Initial commissioning
Normally, the pumps have already been test-run with
water. Unless special agreements have been made,
there could still be residual amounts of water in the
pump. This must be noted in view of a possible
reaction with the medium.
Long life grease lubrication
The rolling bearings are greased for life.
Regreasing is not possible and not necessary.
For service lives, see Section 7.2 .
Oil bath lubrication
Pour in oil into the bearing pedestal!
For procedure and the oil grade, see Sections 7.2
and 7.8.5
6.1.1 Filling the pump housing
Check to see whether the screws on the suction
flange, discharge flange, housing flange and drain
flange are tightened. When retightening the
housing screws, make sure that the support
bracket is undone. Otherwise, the pump could be
deformed.
For screw tightening torques see
Section 1.1 .
Open the suction line fully so that the medium can
flow into the pump.
Open the discharge valve so that the air in the
pump can escape.
If air cannot be vented into the discharge line, e.g.
a drop in pressure in this line is not permitted,
venting must be performed upstream of the
discharge valve.
Monitor the venting operation until no air but only
liquid emerges.
Turn the pump shaft at the coupling several times.
Monitor the venting operation again until no more
air emerges.
Close the discharge valve again until only
the minimum flow rate is obtained after
the motor has been started.
6.1.2 Start-up
Check to see whether the pump shaft can be
readily turned by hand.
Check the direction of rotation of the
motor with the coupling disengaged or
with a rotary field instrument.
As viewed from the motor, the direction of rotation
of the pump is clockwise. See also the
direction
of rotation arrow of the pump.
The pump must not run dry during the check
of the direction of rotation.
Check alignment of the coupling.
Mount coupling guard.