Series RMI-B
close-coupled design
Page
14
9430-055-en
Revision 00
TM 9886
Edition 03/2018
6 Commissioning / Shutdown
6.1 Initial commissioning
Normally, the pumps have already been test-run with
water.
Unless special agreements have been reached, there
may still be some residual amounts of water in the
pump. This must be noted in view of a possible
reaction with the medium.
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 tightening the housing
screws, make sure that the screw connection on
the support bracket of the adapter or the motor is
released. 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 dis-
charge 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.
♦
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.
The pump must be completely filled with liquid.
The maximum admissible flow rate must not be ex-
ceeded.
Otherwise the plain bearings can run dry in
both cases.
♦
Switch the motor on.
♦
Set the desired flow by opening the discharge
valve.
When the motor is running but the pump is
not conveying, this means that the magnetic
drive has stopped.
♦
Switch motor off immediately in order to prevent
overheating of the magnet assemblies.
Then proceeded as follows:
♦
Close discharge valve down to the position "min-
imum flow rate"
♦
Start motor again.
If the magnetic drive stops again, look for the cause.
6.2 Operating limits
The operating limits of the pump/unit in
terms of pressure, temperature, power and
speed are entered in the data sheet and it
is imperative to observe them!
6.2.1 Abrasive media
If liquids with abrasive constituents are
conveyed, increased wear at the pump is to
be expected. The inspection intervals are to
be reduced compared with the usual times.
6.2.2 Min./max. flow rate
The operating range generally recommended lies at
0.3 Q
opt
to 1.1 Q
opt
. Consult the manufacturer for
operation outside this range and observe
Section
2.6.2
.
