Salvatore Robuschi RN Instrucciones De Uso página 4

PUMPS RN
GB
OPERATING INSTRUCTIONS
1. GENERAL
Guarantee
In accordance with our supplying conditions, we inform you that if you
do not follow these instructions, the pump could start to malfunction
or worse damages could occur, whose responsibility we do not
assume. The hydraulic and mechanical characteristics of the pump
can be guaranteed only for operation under the conditions specified
in the order acknowledgement.
Tests
All the pumps of our production undergo accurate testing, on an
appropriate testing desk, to certify:
- the perfect hydraulic seal of all the parts forming the pump; the
pressure test is equal to that of maximum operation
- the complete conformity of the hydraulic and mechanical
characteristics with the requested functional conditions.
Operating conditions
Suitable for dirty liquids even if slightly abrasive, that are not
corrosive for the pump.
2. INSTALLATION
Transport
Lift and transport the pump-motor units, as indicated in fig. 1.
Fig.1 Transport
Base plate
The pump, which is supplied with motor coupling and base plate, is
assembled in our company with the outmost care. Before the final
installation, it is necessary to check that no damage occurred in
transit. The pump has to be entrusted for connection by skilled staff:
a defective connection can cause operation accidents and a
premature pump's wear.
Foundation
The foundation has to be strong and rigid enough to damp vibrations
and hold the unit's alignment, which is usually obtained by means of
a concrete foundation, equipped with small wells (fig.4), where
foundation bolts are to be inserted and covered with final concrete
cast . Place the unit on the foundation and fit some shims close to the
foundation bolts, so that the group lies in an horizontal position,
checking with a water level on the shaft and delivery flange. Cast the
cement and when it has hardened (at least after 48 hours), tighten
the foundation bolts.
Aligning the pump-motor
Remove the coupling protection and unscrew the screws of the
support foot to avoid any stress or shifts of the axis' height. Use a
thickness gauge or comparator to check the angular alignment, then
make sure that the distance between the semi-couplings is the same
along the whole periphery. Then check the parallel alignment with a
ruler or comparator. The unit is aligned only when the distance
between each shaft and the ruler, placed on the coupling, is the same
looking from each of 4 diametrically opposed points. The maximum
axial and radial deviation between the two semi-couplings cannot
exceed 0,1 mm. (fig. 2) For any correction, loosen or take off the
screws, where required, in order to move the feet on the base and, if
it is necessary, fit additional calibrated steels or wash.
a
b
a
b
Fig. 2 Coupling alignment
The coupling cannot offset eventual assembly irregularities
of the group, but it has the unique function of transmitting
torque to the pump.
Suction and delivery pipes.
The suction pipe, whose internal diameter should never be smaller
than the suction port, should be arranged in accordance with the
suction conditions and
characteristics. Make sure that connections in the suction pipe are
perfectly airtight. Moreover, the suction pipe, in the horizontal
sections must have a positive slope towards the pump to avoid that
air pockets occur inside the pipeline.
Should the pump run with a positive slope, pipe is descendant
towards the pump.
Should the pump run with a negative slope in the suction pump,
install a foot valve at the end of the pipe, to allow and keep priming of
the pump.
Fit a check-valve in the delivery pipe to protect the pump from too
high counterpressures or reverse rotation (after each stop).
Pipe clamping.
Suction and delivery pipes have to be supported aside from the
pump, but as close to it as possible. Be sure that pipes are installed
to allow the perfect mating of flanges and counterflanges, avoiding
stress transmission to the pump. A compensation bellows is also
necessary to absorb expansions caused by hot liquids. (see fig.4)
Fig.4 Pipe clamping
Checking.
For a constant and efficient check, install a gauge on the discharge
pipe and a vacuum gauge on the suction pipe.
Electrical connection.
Electrical connection must be carried out by a qualified electrician in
accordance with local regulation. Make sure that the supply voltage
corresponds to the voltage on the motor plate. It will be the local
responsible' s task to make sure earthing is carried out first and all
the installation operations are performed in compliance with the
applicable regulation.
Provide a device to disconnect each phase from the supply with a
break of 3mm between the contacts in the open position.
Regarding motor protection, install a switch or a thermal relay for the
current indicated on the motor plate, plus 5%.
Coupling guard.
According to the security rules, pumps can work only if the coupling is
correctly protected. If not included in the supply, it must be installed
by the final user.
3. OPERATION
a) Check that the pump rotates freely by hand.
b) Check the direction of rotation shown on the pump.
c) Grease lubricated bearings:
- when bearings are ready for the delivery are preliminarily greased
with high quality grease.
d) Oil lubricated bearings:
- pumps are delivered without any oil, therefore, before starting, it is
necessary to fill the bearing housing. Oil is checked by the level rod
which bears the highest-lowest notches.
4
Pipette
Fig.3: Oiler
consider product and temperature's
Glass bulb