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6.2.2. FASTENING DOWN
Bolt the pump on to a concrete base or suitable metal struc-
ture. If the concrete base is an integral part of the reinforced
concrete structure of buildings with occupants, we recom-
mend using anti-vibration supports so as not to disturb any-
body. When fastening, use a drill bit to mark the centres of
the 4 holes in the base of the pump on the surface it is due
to be installed on. Move the pump out of the way while you
drill 4 holes for ø12 screws for EVM 3, 5, 10, 18 pumps and
ø14 screws for EVM 32, 45, 64 pumps. Move the pump back
into position, line it up with the pipes and tighten the screws
GB
all the way.
The position of the fastening holes is also illustrated in chap.
12.2.
6.2.3. PIPEWORK
In addition to the instructions given below, also comply with
the general instructions found in sect. 7.1 in part 1 of the
manual and with the directions in the fi g. 1.
PIPEWORK MUST BE SIZED TO WITHSTAND THE
PUMP'S MAXIMUM WORKING PRESSURE.
On the delivery line, before the nonreturn valve and isolating
valve, as prescribed in sect. 7e) in part 1 of the manual, we
recommend you also install a pressure gauge.
Use suitable supports for the suction and delivery lines
so that they do not subject the pump's fl ange to too much
stress.
If the pump is installed with a suction lift arrangement (level
of liquid lower than the pump) and it feeds an open circuit,
you will need to install a foot valve at the end of the suction
line.
WARNING!
MAKE SURE THAT THE SUM OF THE DIFFERENCE IN
HEIGHT BETWEEN THE WATER AND SUCTION PORT AND
PRESSURE LOSSES ALONG THE SUCTION LINE IS LOWER
THAN THE PUMP'S THEORETICAL SUCTION LIFT. WATER
TEMPERATURE AND ALTITUDE ALSO HAVE A NEGATIVE
EFFECT ON THE PUMP'S THEORETICAL SUCTION LIFT. IF
THE SUM OF THE VARIOUS FACTORS AFFECTING SUCTION
LIFT EXCEEDS THE ACTUAL PUMP'S THEORETICAL SUC-
TION LIFT, WE ARE FACED WITH THE CAVITATION PROB-
LEM, WHICH COMPROMISES HYDRAULIC PERFORMANCE
AND RESULTS IN DAMAGE TO SOME OF THE PUMP'S VITAL
PARTS. CHAP. 12.7 GIVES SPECIFIC INFORMATION ON
HOW TO CHECK THAT THE PUMP'S OPERATION IS NOT BE-
ING AFFECTED BY CAVITATION.
6.3. WIRING (FIG. 3 PAG. 103)
Comply with the instructions given in sect.8 in PART 1 of the
manual and with the following additional rules.
Before starting to make electrical connections, make sure
that line voltage and frequency match the motor's values
given on the rating plate.
You must insert a control panel between the line and the
motor-driven pump featuring the following devices (unless
otherwise specifi ed by local standards);
-
Switch with at least a 3mm gap between contacts;
-
Short-circuit protection device (fuse or thermomagnetic
circuit breaker);
-
High-sensitivity (0.03 A) residual current circuit breaker;
-
We recommend installing a device to protect against dry
running, which must be connected to a fl oat, sensors or
other such equipment;
Wiring diagrams are featured on the inside of the terminal
10
board's cover as well as in the fi gures referred to in chap.
12 in part 1.
Connect the yellow/green wire to the PE terminal fi rst, leav-
ing it longer than the others so that it will be the last wire to
be pulled out if accidentally tugged.
If the terminal box is in an awkward position for connecting
the cable, you can change its position by turning the motor
90° or 180° or 270°. To do this, you will need to remove
the 4 screws fastening the motor to the sleeve, lift the motor
just enough to allow rotation, without removing the coupling
between the motor shaft and pump shaft. Then screw the 4
screws back in.
7. FILLING THE PUMP
WARNING!
DO NOT START THE PUMP UNTIL IT HAS BEEN
POSITIONED AND INSTALLED IN ITS FINAL PLACE OF
OPERATION TO BE PERFORMED WITH THE MOTOR'S
TERMINAL STRIP FULLY CLOSED
The pump and suction line must be fi lled with water. As spec-
ifi ed earlier in sect. 9 in part 1, running the pump without
water inevitably causes serious damage to a number of the
pump's internal parts.
Fill the pump with the terminal box closed and the power
supply disconnected.
7.1. FILLING PUMP IN SUCTION LIFT ARRANGEMENT
a) Unscrew the hexagonal cap located above the outer
jacket on a level with the upper mount (remove coupling
covers if necessary);
b) With the aid of a funnel, fi ll the suction line and pump
casing with water to overfl owing;
c) Screw the hexagonal cap back on until it is locked tight;
d) Areas that have become wet as a result of water leaks
must be dried thoroughly;
e) Refi t the coupling covers if they have been removed;
7.2. FILLING PUMP IN A FLOODED INSTALLATION
a) Unscrew the hexagonal cap;
b) Open the suction gate valve until the water comes out;
c) Screw the cap back on until it is locked tight. Starting and
operation;
8. STARTING AND RUNNING
8.1. CHECKING DIRECTION OF ROTATION
Once you have connected the pipework, performed the
wiring and fi lled the pump, the last step before putting the
pump into operation is to check the direction of rotation.
Start the motor-driven pump (switch on control panel set to
"on") with the isolating valve on the delivery line closed.
Check direction of rotation through the openings in the mo-
tor's fan cover. It is easy to determine direction of rotation
when starting or stopping. The correct direction of rotation
is clockwise, looking at the motor from the fan side (also
indicated by the arrow on the upper mount). If direction is
wrong, cut off power to the pump (set switch to "off") and
swap over the two power supply wires in the panel or on the
motor's terminal board.
8.2. RUNNING
Start the pump with the isolating valve on the delivery line
closed, then open it gradually. The pump must operate
smoothly and quietly. Close the isolating valve again and
make sure that the reading on the delivery line's pressure
gauge is close to the Hmax value as indicated on the rating
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