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MXH Rev20 - Operating Instructions
8.1. Routine maintenance
OFF
Before every maintenance operations
disconnect the power supply and make sure
that the device could not accidentally operate.
In the case of water containing chloride
(chlorine, sea water), the risk of corrosion
increases in stagnant water condictions (also
with an increase in temperature and decrease
of pH value). In these cases, if the pump
remains inactive for long periods, it must be
emptied completely and, preferably, dried.
For good measure, as in the case of temporary
operation with dirty liquids, run the pump
briefly with clean water to remove deposits.
When the pump remains inactive it must be
emptied completely if there is a risk of freezing
(par. 12.3 fig. 5).
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
8.2. Dismantling the system
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump.
8.3. Dismantling the pump
OFF
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump (par. fig.
5).
For dismantling and re-assembly see construction
in the cross section drawing.
By removing the screws (14.24) and the square nuts
(14.28 for MXH 2,4,8) the motor can be taken out
complete, with all internal parts of the pump, without
removing the pump casing (14.00) and the pipes.
9. DISPOSAL
OFF
The final disposal of the device must be done by
specialized company.
Make sure the specialized company follows the
classification of the material parts for the separation.
Observe the local regulations and dispose the device
accordingly with the international rules for environment
protection.
10. SPARE PARTS
10.1.
Spare-parts request
When ordering spare parts, please quote their
designation, position number in the cross section
drawing and rated data from the pump name plate
(type, date and serial number).
The spare parts request shall be sent to CALPEDA
S.p.A. by phone, fax, e-mail.
11. ESIGNATION OF PARTS
Nr. Designation
14.00
Pump casing
14.04
Plug (filling)
14.06 O-ring
14.12
Plug (draining)
14.16 O-ring
14.20 O-ring
14.24 Screw
14.28
Square nut
14.54
Wear ring (1)
25.01
First stage casing
25.02
Stage casing
25.03
Stage casing with bearing (2)
25.05
Last stage casing
25.10
Washer for missing impeller
25.11
First stage spacer
28.00 Impeller
28.04
Impeller nut
28.08 Washer
32.00
Lantern bracket
34.00
Casing cover
34.12 Screw
36.00
Mechanical seal
36.51
Retaining ring, split
36.52
Shoulder ring
46.00
Deflector
64.10
Bearing sleeve (2)
64.13
Spacer sleeve
64.14
Spacer sleeve
64.15
Spacer sleeve
64.19
Spacer sleeve, bearing stage (2)
70.00
Lantern bracket
70.18 Screw
70.20 Screw
73.00
Pump-side bearing
76.00
Motor casing with winding
76.04
Cable gland
76.16 Support
76.54
Terminal box, set
78.00
Shaft with rotor packet
81.00
Fan-side bearing
82.00
Motor end shield, fan side
82.04
Compensating spring
82.08 Screw
88.00
Motor fan
88.04
Compensating spring
90.00
Fan cover
90.04 Screw
92.00 Tie-bolt
94.00 Capacitor
94.02
Capacitor gland
98.00
Terminal box cover
98.04 Screw
98.08
Gasket
(1) Inserted in the stage casing
(2) Only for MXH 805
Changes reserved.
