When the pump remains inactive it must be emptied
completely if there is a risk of freezing
Fig. 4
.
Before restarting the unit, check that the shaft is not
jammed and fill the pump casing completely with liquid.
8.2
Maintenance
Pumps with packing seal
First loosen the gland slightly so that the seal is decom-
pressed. Then adjust the gland, leaving a regular leaka-
ge-drip, which indicates proper lubrification.
The packed gland must be replaced when its sealing
properties have considerably decreased. A compres-
sed, hardened and dry packing causes the shaft to
wear.
8.3 Bearings lubrication
Up to frame size 160 the motors have prelubricated
bearings and they do not require any relubrication.
From frame size 180 the motors have grease nipples. A
relubrication at regular intervals (about 5000 h) is
recommended only in heavy working conditions, with
high ambient temperatures. An excess of grease is
harmful. Use lithium base grease for high temperatures.
8.4 Dismantling the system
Close the suction and delivery gate valves and drain
the pump casing before dismantling the pump.
8.5. Dismantling the pump
Close the suction and delivery gate valves and drain the
pump casing before dismantling the pump.
For dismantling and reassembly see construction in the
cross section drawing.
The motor and all internal parts can be dismantled
without removing the pump casing and pipes.
By removing the nuts (14.28) the motor can be taken
out complete with the impeller.
9. DISPOSAL
European Directive
2012/19/EU (WEEE)
The final disposal of the device must be done by spe-
cialized company.
Make sure the specialized company follows the
classification of the material parts for the separa-
tion.
Observe the local regulations and dispose the device
accordingly with the international rules for environ-
ment protection.
10 SPARE PARTS
10.1 Spare-parts request
When ordering spare parts, please quote their desi-
gnation, position number in the cross section drawing
and rated data from the pump name plate.
The spare parts request shall be sent to CALPEDA
S.p.A. by phone, fax, e-mail.
11 DESIGNATION OF PARTS
Nr. Designation
14.00Pump casing
14.04Plug (filling)
14.12Plug (draining)
14.20O-ring
14.24Screw
14.28Nut
28.00Impeller
28.04Impeller nut
28.12Circlip
28.20Impeller key
32.00Lantern bracket
32.30Guard
32.32Screw
32.33Caged Nut
34.00Casing cover
36.00Mechanical seal
36.50Shoulder ring
46.00Deflector
64.00Pump shaft
66.00Ball bearing, coupling side
66.18Circlip
70.18 Screw
70.19 Nut
73.00Pump-side bearing
76.00Motor casing with winding
76.04Cable gland
76.16Support
76.20Pin
76.54Terminal box, set
78.00Shaft with rotor packet
81.00Fan-side bearing
82.00Motor end shield, fan side
82.04Compensating spring
88.00Motor fan
90.00Fan cover
90.04Screw
92.00Tie-bolt
94.00Capacitor
94.02Capacitor gland
98.00Terminal box cover
98.04Screw
98.08Gasket
99.00Motor, complete
Changes reserved.
NM 40/20 - Operating Instructions
Page 7
Fig. 4 Draining.
IST NM 07_2018ed26_MXS 11_03con gall 19/06/18 09:03 Pagina 14
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