Precautions - Lowara e-NSC Série Manuel D'installation, D'utilisation Et D'entretien

en - Original instructions
Standard/ Material code
Optional
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Optional
3.6 Mechanical seal
Unbalanced single mechanical seal acc. EN 12756,
version K Dimensions.
3.7 Application limits
Maximum working pressure
This flow chart shows the maximum working pres-
sure depending on the pump model and the temper-
ature of the pumped liquid.
p [bar]
20
15
10
CC, CB, CN, CR
5
0
-40 -20 0 20 40
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
Version Gasket
Standard EPDM
Optional FPM (FKM) -20°C
For special requirements, contact the Sales and
Service Department.
Maximum number of starts per hour
18
Material cas-
ing/impeller
CB Cast iron /
Bronze
CS Cast iron / Fab-
ricated Stain-
less 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
BQ EGG-WA
U AEGG
1
3
Q Q EGG
1 1
BQ VGG
1
Q Q VGG
1 1
U AVGG
3
60 80 100 120 140 160
t [°C]
Minimum Maximum
-25°C 140°C
(-13°F) (284°F)
90°C
(-4°F) (194°F)
This table shows the number of starts allowed per
hour for motors supplied by Lowara:
kW 0.25 4.00 11 -
- - 15
3.00 7.50
Starts 60 40 30
per
hour
NOTICE:
If you use a different motor from the standard one
supplied with the electric-pump, check the relevant
instructions to find out the permitted number of starts
per hour.
Noise level
For the measured surface sound pressure levels of
pump alone and pump equipped with standard sup-
plied motor, see Table 9 .
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