Calpeda MXV-B Instructions Pour L'utilisation page 17

source (with consideration given to the NPSH value).
Provide space around the pump for motor
ventilation, to allow for checking of shaft rotation,
for filling and draining the pump and to allow for
collection of the liquid to be removed (especially
for draining liquids which are harmful or have to be
removed at temperatures higher than 60 ˚C).
Make sure prolonged accidental leakage of
liquid does not cause damage to persons
or property.
Leakage may develop as a result of surge pressure or
water hammer, erroneous operations (such as failing
to close a plug or valve) or other functional disorders.
Allow for the possibility of channeling away any leaked
liquid or for an automatic drainage system against
flooding.
Mount the pump on a flat horizontal surface (using a
level gauge) such as a solid cement base or a rigid
supporting structure in metal.
To ensure stability, insert, if necessary, small pieces of
calibrated metal plate next to the 4 anchoring screws.
6.5. Connecting the
MXV(L)4)
The MXV(L), MXV(L)4 pumps are designed for use
with standard electric motors with (IEC 34-7) IM V1
construction form and dimensions and output ratings
in accordance with IEC 72.
If a pump is supplied without the motor, check the
rated power and rpm indicated on the name plate and
technical data given in the data sheet.
ATTENTION: the motors must have two lifting points
in diametricalIy opposite positions for vertical lifting
with the shaft end downwards (fig.1 b)
Before installation clean the motor shaft extension, the
key and contact surfaces of the flanges to remove any
protective paint, dirt or oxydation.
Lubricate the motor shaft extension with a graphite-
base, dripfree, anti-friction product.
Do not use oil as it can harm the mechanical seal
below (see section 8.4.).
With the pump in the vertical position, insert the motor
shaft in the coupling, aligning the key with the key slot
and resting the motor flange on the lantern flange.
Turn the motor, adjusting the position of the terminal
box as required and aligning the holes on the flanges.
ATTENTION: the 4 flange screws (70.18) with
nut must be uniformly tightened with alternated
crossover tightening procedure in diametrically
opposite positions (see section 9.1.).
Before and after tightening the screws (70.18), make
sure the coupling with pump shaft and motor shaft can
be freely turned by hand (remove and then replace the
guard 32.30).
ATTENTION: for removing or replacing the motor
see section 8.3.
6.6. Horizontal installation MXV(L) 50-65-80,
MXV(L)4 50-65-80
6.6.1. Connection of support feet
MXV, MXV-B Rev4 - Operating Instructions
motor (only MXV(L),
For the mounting of the support feet all tour nuts
(61.04) on the tie-bolts (61.02) must be removed (see
cross-section drawing in section 14.).
ATTENTiON: do not loosen only the two nuts on the
side of the upper cover to which the support foot is
to be attached.
To remove the 4 nuts (61.04) the lantern bracket
(32.00) must be removed. With the pump in the vertical
position, carry out dismantling sequences 1 - 6 in
section 9.
Remove the washers (61.03) and attach the support
foot (61.30) on the side of the upper cover (34.02) in
the appropriate position depending on the directional
arrangement of the pump casing (14.00) suitable for
the system: suction on the left and delivery on the right,
or vice-versa (fig.2).
4.93.213/3
Variation 1: suction on the left,
delivery on the right
Fig.2 Orientation of the ports in a horizontally-fitted pump
Do not insert the two washers (61.03) on the support
foot when the tie-bolts (61.02) do not protrude from the
nuts (61.04).
The 4 nuts must be uniformly tightened with
alternated crossover tightening procedure in
diametrically opposite positions. Tightening torque
as per section 9.1.
Mount the lantern bracket (32.00) with the coupling
(64.22) and position the pump shaft as indicated in
section 9.2.
Mount the motor as indicated in section 6.5, and
orientate the terminal board with respect to the support
foot (61.30) in the position most suitable for the system.
After setting the pump in the horizontal position, fix
the second support (61.30) to the base (61.00), with
the screws (61.30), washers (61.34) and nuts (61.36),
and check for accurate levelling of the installation with
respect to the first foot.
6.7. Pipes
Provide a diameter assuring a liquid flow velocity not
higher than 1.5 m/s for suction, and 3 m/s for delivery.
The pipe diameters must never be smaller than the
pump connection ports.
The arrows on the pump casing (14.00) indicate the
inlet (suction) and outlet (delivery) ports.
Ensure the internal pipe surface is clean before
connection.
Secure all pipes to their rests close to the pump and
connect them so that they are not subjected to stress
and do not transmit vibration or flexion strain to the
pump (see fig.3).
Provide for the possibility of draining the pump
without having to drain the entire system.
Install correctly any compensators for absorption of
expansion or impeding noise transmission.
Make sure gaskets do not protrude inside the pipes
for the pump types MXV-B, MXV(L) 25,32,40 and
4.93.213/4
Variation 2: suction on the right,
delivery on the left
Page 17 / 136
GB