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NM-NMD Rev23 - Operating Instructions
Page 9 / 64
1.3. Authorized operators
The product is intended for use by expert operators
divided into end users and specialized technicians.
(see the symbols above).
i
It’s forbidden, for the end user, carry out
operations which must be done only by
specialized technicians. The manufacturer
declines any liability for damage related to the
non-compliance of this warning.
1.4. Warranty
For the product warranty refer to the general terms and
conditions of sale.
i
The warranty covers only the replacement and
the repair of the defective parts of the goods
(recognized by the manufacturer).
The Warranty will not be considered in the following
cases:
- Whenever the use of the device does not conform
to the instructions and information described in this
manual.
- In case of changes or variations made without
authorization of the manufacturer.
- In case of technical interventions executed by a non-
authorized personnel.
- In case of failing to carry out adequate maintenance.
1.5. Technical assistance
Any further information about the documentation,
technical assistance and spare parts, shall be
requested from: Calpeda S.p.A. (paragraph 1.2).
2. TECHNICAL DESCRIPTION
Close-coupled, centrifugal pumps; electric motor with
extended shaft directly connected to the pump.
NM, NM4 25: single-impeller
NMD: with two back-to-back impellers (with axial thrust
balancing).
C: with open impeller
C 16/1E: Free-flow impeller (vortex or recessed impeller).
Connections: threaded ports ISO 228/1 (BS 2779).
NM, NMD, C: version with pump casing and lantern
bracket in cast iron.
B-NM, B-NMD, B-C: version with pump casing and
lantern bracket in bronze.
(the pumps are supplied fully painted).
2.1. Intended use
NM, NMD, NM4 25: for clean liquids without abrasives,
non-explosive, non-aggressive for the pump materials.
Liquid temperature from -10 °C to +90 °C.
C: for moderately dirty liquids (maximum size of solids:
4 mm), non-explosive, non-aggressive for the pump
materials. Liquid temperature from -10 °C to +90 °C.
2.2. Improper use
The device is designed and built only for the purpose
described in paragraph 2.1.
Improper use of the device is forbidden, as is
use under conditions other than those indicated
in these instructions.
Improper use of the product reduces the safety and
the efficiency of the device, Calpeda shall not be
responsible for failure or accident due to improper use.
2.3. Marking
The following picture is a copy of the name-plate (see
Pic.1) that is on the external case of the pump.
1 Pump type
2 Delivery
3 Head
4 Rated power
5 Tension nominale
6 Nom. motor current
7 Notes
8 Fréquence
9 Operation Duty
10 Insulation class
11 Weight
12 Power factor
13 Rotation speed rpm
14 Protection
15 Serial number
16 Certifications
Example plate pump
Made in Italy
MONTORSO
XXXXXXX
Q min/max X/X m
3
/h
XXXXXXX
H max/min X/X m
IP XX
n XXXX/min
220∆/380Y V3~50Hz
cosø X
X/X A
XXXXXXXX
S1 l.cl. X X kg
X kW (XHp) S.F.
VICENZA
1
2
3
4
5
6
7
8
9 10
16
15
14
13
12
11
3. TECHNICAL FEATURES
3.1. Technical data
Dimensions and weight (see technical catalogue).
Nominal speed 2900/3450 rpm (1450/1750 rpm for
NM4 25)
Protection IP 54
Supply voltage / Frequency:
- up to 240V 1~ 50/60 Hz
- up to 480V 3~ 50/60 Hz
Check that the mains frequency and voltage
correspond to the electrical characteristics shown on
the indicator plate.
The electric data marked on the label are referred to
the nominal power of the motor.
Sound pressure:
up to 2.2 kW: ≤ 70 dB (A);
from 3 to 9.2 kW: ≤ 85 dB (A).
Max. starts per hour: 30 at regular intervals.
Maximum permissible working pressure:
NM, NMD 20, NM4 25
100 m (10 bar)
NMD 25, 32 ,40
160 m (16 bar)
C
60 m (6 bar)
3.2. Operating conditions
Installation in well ventilated location protected from
the weather, with a maximum ambient temperature of
40 °C.
4. SAFETY
4.1. General provisions
Before using the product it is necessary to
know all the safety indications.
Carefully read all operating instructions and the
indications defined for the different steps: from
transportation to disposal.
The specialized technicians must carefully comply
with all applicable standards and laws, including local
regulations of the country where the pump is sold.
The device has been built in conformity with the current
safety laws. The improper use could damage people,
animals and objects.
The manufacturer declines any liability in the event of
damage due to improper use or use under conditions
other than those indicated on the name-plate and in
these instructions.
NM-NMD Rev23.indd 9
19/04/17 10:13
