Electrical Connection - Foras Sd Installations- Und Gebrauchsanweisungen

INSTRUCTIONS FOR INSTALLATION AND USE OF FORAS
SURFACE ELECTRIC PUMPS
Use an installation
The standard version of surface motor-driven pumps manufactured by Foras:
They are suited to pump clean water and liquids that are not chemically or mechanically aggressive for
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the materials of the pump and non-explosive liquids, at a temperature of:
• +5 °C to +50 °C for all the models fitted with Noryl hydraulics, except for PLUS models, for which it
is advisable not to exceed +35 °C;
• from -15 °C to +90 °C, for models with a metal rotor (brass, steel, cast iron);
• from -15 °C to +110 °C, for the PLUS S, SL and SLX models.
Bear in mind that a higher temperature of the liquid to pump, like the suitability of the installation side of the
motor-driven pump, reduce the suction possibility/capability of the pumps.
They should be installed in well ventilated, not dusty areas protected from the elements, with an am-
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bient temperature between 5 e 40 °C; when installing the machine we recommend carefully examining
the necessary space to conduct any repairs or to remove the pump itself. Remember that ambient
temperature and the suitability of all the installation site of the motor-driven electric pump influence the
cooling of the electric motor and, therefore, the possibility of operating it at full load.
The machines are provided with threaded or flanged openings (fitted with counterflanges), horizontal
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or vertical rotor axis and supporting feet/base; for safety reasons we recommend fastening the motor-
driven electric pump using the designated holes on the supporting feet/base; avoid installing the motor under the body of the pump.
They cannot be subjected to more than:
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• 10 start-ups per hour at regular intervals: models with rated power from 10 to 37 kW;
• 15 start-ups per hour at regular intervals: models with noryl hydraulics or with rated power from 3 to 7.5 kW;
• 30 start-ups per hour at regular intervals: models with stainless steel hydraulics or with rated power
up to 2.2 kW;
The greater the power of the machine and low where the maximum amount of tolerated start-ups. For pres-
surisation units, to regulate the no. start-ups per hour of the motor-driven pump, it is necessary to act on
the calibration pressures of the pressure switch by increasing the "ΔP" differential (see related paragraph)
or increase the capacity of the tank (by adding other tanks identical to the existing one or replacing it with
one with a greater volume). Pay special attention to the operation of the motor-driven pumps with "press-
control" and/or "press-flow switch" systems: minimal and imperceptible leaks in the system may lead to a
large number of start-ups/stops of the motor-driven pump, thereby affecting in its durability. We recommend
installing these devices in combination with an autoclave tank, even one with a limited capacity (0.5-1 litres).
They can withstand maximum operating pressure (equal to the suction pressure + head with a closed outlet valve) of:
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JA60÷100/JG/JXF/PA80-100/PE-PL50/CP/KB100/KM50-80-100/SD/RA/SE/SC
JAM/JA/PA150÷300/PE-PL100/KBJ/KM160÷550/JXM/MON
PLUS 50Hz with rotors ≤7/ ≤7/ PLUS 60Hz with rotors ≤5
PLUS 50Hz with rotors ≥8/ PLUS 60Hz with rotors ≥6
Piping
The pipes must be fixed and anchored to their support and connected so that they do not transmit stress,
strain and vibrations to the pump. -Fig. 4- For Garden motor-driven pumps (portable) we recommend using
spiral pipes (non-deformable) which can be supplied as a kit together with the pumps. The internal diameter
of the pipes depends on their length and the flow they need to deliver: this should be chosen so that the
speed of the liquid does not exceed 1.4-1.5 m/s in suction mode and 2.4-2.5 m/s in delivery mode; in any
case the diameter of the pipes should not be smaller in diameter than the pump's openings. Before installing them
check that they are clean inside.
The suction piping should: -Fig. 5-
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• be as short as possible, there should be no twists or sudden changes of direction;
• be in perfect conditions and resist to the depression created when the pump is sucking in;
• slope upward to the pump inlet, to prevent air bubbles that may obstruct priming or cause unpriming.
If the pump is operating under suction conditions, insert a foot valve with a strainer; if installing a self-priming
pump, the foot valve can be replaced by a check valve mounted directly on the suction opening. For the
motor-driven pump to operate correctly, the end of the suction pipe should be submersed in water at a depth
of at least twice the diameter of the pipe itself. For underhead operation insert a lock gate. -Fig. 3-
The flow piping should be fitted with a check valve (positioned upstream to protect the pump from the
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water hammer and prevent reversed flow through the rotor) and a control valve (positioned down-
stream to control the flow, the head and the power absorbed). -Fig. 3-. For self-priming motor-driven
pumps, for considerable self-priming - suction heights (greater than 5 m, though in any case less than 9
m), the flow piping should have a straight and vertical section of at least 1.0 m.

Electrical connection

The autoclaves ( motor-driven pumps with membrane and precharge tank) and the Gardens supplied are
ready to be installed and used. Any replacement of the power supply cable, related plug, switch and pressure
switch should be conducted by expert personnel; in any case use components identical to existing ones For
all other pumps it is necessary to use adequate electric power supply cables based on their length and the
electric currents reported on the claim that of the motor-driven pump: prepare the ends of the power supply
and earth conductors so that when they are connected the conductors themselves are tightly secured when
the corresponding nuts of the terminal and the earth screw are tightened. The electrical connection should,
in any case, be conducted by expert personnel, in compliance with local regulations. Check the voltage/fre-
quency of the mains power supply and the data on the plate of the motor-driven pump: then connect the
terminals according to the indications in the diagram reported on page.4 and/or inside the lid of the terminal
PUMP TYPE
Normalised MN serie
KB160÷1500
bar
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