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denominazione del ricambio.
OPERATING INSTRUCTIONS
1° OPERATING CONDITIONS
- For clean liquids without abrasives, without suspended
solids non explosive, non aggressive for the pump
materials,
with
a
60°C(CM22-CM32)
90°C (CFM-CBM-2CM-CM)
- Maximum final pressure level admitted into the pump
casing: 10 bar.
- Installation in correctly ventilated locations protected
from the atmospheric agents, with a maximum room
temperature of 40°C.
- Maximum voltage variation to the nominal value shown
on the name plate: ±6%.
Centrifugal motor pumps must be installed with the rotor
axis horizontal and feet downwards.
Moreover, they can also be installed in other positions
provided they are supported by rigid and stable pipes
and provided that it is possible to fill and to drain the
pump casing and the drain of the condensation water
that accumulates in the motor. For safety reasons avoid
any location where the motor is under the pump.
Place the pump as close as possible to the suction
source.
3° Pipes
Secure all pipes to support so that they do not carry on
stress, strain or vibration to the pump.
The inner pipe diameter depends on the capacity
required. If possible, diameter has to enable a liquid
speed not higher than 1.5 m/s during suction and 3 m/s
during delivery. The pipe diameters never have to be
smaller than the pump connections.
The suction pipe must be perfectly airtight and be led
upwards in order to avoid air pockets.
For suction operation fit a strainer-equipped valve,
which must always be immersed.
For suction from a storage tank fit a check valve.
For positive suction head operation fit a gate valve.
Follow local specifications if increasing network
pressure. Fit a gate valve into the delivery pipe to
adjust delivery, head, and absorbed power.
Install a pressure gauge.
maximum
temperature
2° Installation
With a geodetic head at outlet over 15m fit a check
valve between the pump and the gate valve in order to
protect the pump from water hammering.
Ensure the inner sides of the pipes are clean before
connection.
4° Electrical connection
Electrical connection must be carried out by a qualified
electrician in compliance with local regulation. The unit
must be properly earthed (grounded). Position the
terminals following the instructions written on in the
plate, which is placed inside the capacitor box . Install
a device for disconnection from the supply, having a
contact separation of at least 3 mm in all poles. With
three-phased motor provide an overload protective
device in line with the name plate current.
Single phase pumps are supplied with a capacitor
connected to the terminals and with inset thermal
protector for 230-240 V - 50 Hz.
5° Start-up
Check that the shaft turns by hand.
For this purpose the smaller pumps have a screwdriver
notch on the ventilation side of the shaft end.
Never run the pump dry.
of
Start the pump after filling it up with liquid through the
relevant priming hole.
When operating under positive suction head, fill the pump
by opening the suction gate valve slowly and completely,
keeping the delivery gate valve open to release the air.
With three phase motor check that the direction of
rotation is as shown by the arrow on the pump
casing; otherwise reverse the connections of the
phases.
Check that the pump works within its field of performance,
and that the absorbed current shown on the name plate
is not exceeded.
Otherwise adjust the delivery gate valve, or the sitting of
any pressure switches.
6° Maintenance
When the pump is not used, empty it completely if
freezing may be expected.
Before restarting the pump, check that the shaft is not
jammed from incrustations or other causes and fill the
pump casing completely with liquid.
CAUTION: disconnect the mains before any servicing
operation.
7° Dismantling
Close the suction and delivery gate valves and drain the
pump casing before dismantling the pump.
For dismantling and re-assembly see construction in the
cross section drawing., shown in the following pages of
this instructions handbook.
To dismantle the pump side, undo the support screws,
while to dismantle the motor side you should take out,
with the help ofa screwdriver, the fan cover (which is
pressure fixed), the fan and then you should unscrew the
four tie-rods.
When ordering spare parts, please refer to data
stamped on name plate and position number of each
spare part required in compliance with the cross
section drawing.
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