Pratissoli MW Serie Manuel D'utilisation Et D'entretien page 50

8 PORTS AND CONNECTIONS
The MW series pumps are equipped with (see Fig. 4 and
Fig. 4/a):
2 "IN" inlet ports:
G2" (on MW32, MW36, MW40 versions)
Ø66 mm (on MW45, MW50, MW55 versions).
Line connection to any of the two ports is indifferent for
proper pump functioning. The unused ports must be
hermetically closed.
2 "OUT" outlet ports
G1" (on MW32, MW36, MW40 versions)
G1 ¼" (on MW45, MW50, MW55 versions).
1 "DRAIN" port: with G1/2" orifice obtained in the lower cover
to monitor any leakage of water due to wear on the pressure
seals. If there are any leaks then refer to the repair manual.
This orifice must always be kept open.
9 PUMP INSTALLATION
9.1 Installation
The pump must be fixed horizontally using the M16 threaded
support feet. Tighten the screws with a torque of 200 Nm.
The base must be perfectly flat and rigid enough as not to
allow bending or misalignment on the pump coupling axis/
transmission due to torque transmitted during operation.
Two lifting brackets are mounted on the pump for easy
installation, as per the figure below.
The brackets are sized for lifting the pump only.
Therefore they must never be used for any
additional loads.
Replace the oil filling hole closing service plug
(red) positioned on the rear casing cover. Check
the correct quantity with the oil dipstick.
The oil dipstick must always be reachable, even
when the unit is assembled.
Grounding: It is necessary to fix a grounding
cable to the pump by means of the M8 stainless
steel screw and the stainless steel toothed washer
properly marked by the YELLOW label. See the "ATEX
EXPLOSION PROTECTION" manual.
Fig. 4
The pump shaft (PTO) should not be rigidly
connected to the propulsion unit.
The following types of transmission are
recommended:
- Flexible joint.
- Cardan-shaft (comply with manufacturer's Max.
recommended working angles).
- Belts, for proper application consult with our
Technical or Customer Service Departments.
In all cases, the transmission must be properly
assembled to avoid incorrect or harsh operation
of the connection parts and prevent excessive
wear, an increase in temperature and/or hazardous
Fig. 4/a breakages that may create potential sources of
ignition and explosion. See the "ATEX EXPLOSION
PROTECTION" manual.
9.2 Rotation direction
The direction of rotation of the PTO is indicated by an arrow
on the reduction unit cover.
From a position facing the pump head, the rotation direction
will be as in Fig. 5.
LH SIDE
anticlockwise
50
RH SIDE
clockwise
Fig. 5