Lowara NSC Serie Manual De Instalación, Funcionamiento Y Mantenimiento página 18

en - Original instructions
The nameplate provides information regarding the
impeller and casing material, the mechanical seal
and their materials. For more information, see
3 on page 375.
IMQ or TUV or IRAM or other marks (for electric
pump only)
Unless otherwise specified, for products with a mark
of electrical-related safety approval, the approval re-
fers exclusively to the electrical pump.
3.4 Pump description
• Connection dimensions according EN 733 (mod-
els 32-125...-200; 40-125...-250; 50-125...-250;
65-125...-315;80-160...-315; 100-200...-400;
125-250...-400; 150-315...-400).
• Volute casing pump with back pull out bearing
bracket.
3.5 Material
The metallic parts of the pump that come in contact
with liquid are made of the following:
Material code Material cas-
ing / impeller
CC Cast iron/Cast
CB Cast iron/
Bronze
CS Cast iron/
Stainless steel
CN Cast iron/
Stainless steel
DC Ductil iron /
Cast iron
DB Ductil iron /
Bronze
DN Ductil iron /
Stainless steel
NN Stainless steel /
Stainless steel
RR Duplex/Duplex
3.6 Mechanical seal
Unbalanced single mechanical seal acc. EN 12756,
version K.
3.7 Application limits
Maximum working pressure
Figure 4 on page 379 shows the maximum working
pressure depending on the pump model and the
temperature of the pumped liquid.
P + P ≤ PN
1max max
P Maximum inlet pressure
1max
P Maximum pressure generated by the pump
max
PN Maximum operating pressure
Liquid temperature intervals
18
Figure
Standard/
Optional
Standard
iron
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Optional
Figure 4 on page 379 shows the working tempera-
ture ranges.
For special requirements, contact the sales and
service representative.
Maximum number of starts per hour
kW 0.25 4.00 11
- - -
3.00 7.50 15
Starts 60 40 30
per
hour
Noise level
For the sound pressure levels of pump equipped
with standard supplied motor, see
380.
For sound pressure levels of pump without motor,
see Table 10 on page 384.
4 Installation
Precautions
WARNING:
• Observe accident prevention regula-
tions in force.
• Use suitable equipment and protec-
tion.
• Always refer to the local and/or na-
tional regulations, legislation, and co-
des in force regarding the selection of
the installation site, plumbing, and
power connections.
Electrical Hazard:
• Make sure that all connections are
performed by qualified installation
technicians and in compliance with
the regulations in force.
• Before starting work on the unit,
make sure that the unit and the con-
trol panel are isolated from the power
supply and cannot be energized. This
applies to the control circuit as well.
Grounding (earthing)
Electrical Hazard:
• Always connect the external protec-
tion conductor to ground (earth) ter-
minal before making other electrical
connections.
• You must ground (earth) all electrical
equipment. This applies to the pump
equipment, the driver, and any moni-
toring equipment. Test the ground
(earth) lead to verify that it is connect-
ed correctly.
• If the motor cable is jerked loose by
mistake, the ground (earth) conductor
should be the last conductor to come
loose from its terminal. Make sure
that the ground (earth) conductor is
longer than the phase conductors.
18.5 30 45 90
- - -
22 37 75 160
24 16 8 4
Table 9 on page