Electrical Requirements; Install The Pump; Mechanical Installation - Lowara e-NSC Series Montage-, Betriebs- Und Wartungshandbuch

en - Translation of the original instructions
WARNING:
Do not use the on-off valve on the discharge side in the
closed position in order to throttle the pump for more than a
few seconds. If the pump must operate with the discharge
side closed for more than a few seconds, a bypass circuit
must be installed to prevent overheating of the liquid inside
the pump.
For illustrations that show the piping requirements, see
Figure 19 .

4.2 Electrical requirements

• The local regulations in force overrule these specified require-
ments.
• In the case of fire fighting systems (hydrants and/or sprinklers),
check the local regulations in force.
Electrical connection checklist
Check that the following requirements are met:
• The electrical leads are protected from high temperature, vibra-
tions, and collisions.
• The power supply line is provided with:
• A short-circuit protection device
• A mains isolator switch with a contact gap of at least 3 mm
The electrical control panel checklist
NOTICE:
The control panel must match the ratings of the electric pump. Improp-
er combinations could fail to guarantee the protection of the motor.
Check that the following requirements are met:
• The control panel must protect the motor against overload and
short-circuit.
• Install the correct overload protection (thermal relay or motor pro-
tector).
Pump Type
Single phase standard electric
pump ≤ 1,5 kW
Three phase electric pump and
other single phase pumps
• The control panel must be equipped with a dry-running protection
system to which a pressure switch, float switch, probes, or other
suitable device is connected.
• The following devices are recommended for use on the suction
side of the pump:
• When the liquid is pumped from a water system, use a pres-
sure switch.
• When the liquid is pumped from a storage tank or reservoir,
use a float switch or probes.
• When thermal relays are used, relays that are sensitive to phase
failure are recommended.
The motor checklist
WARNING:
• Read the operating instructions in order to ensure
whether a protection device is provided if another motor
other than the standard is used.
• If the motor is equipped with automatic thermal protec-
tors, be aware of the risk of unexpected starts in con-
nection to overload. Do not use such motors for fire-
fighting applications and sprinkler systems.
3
fuses aM (motor starting), or magneto-thermal switch with curve C and Icn ≥ 4,5 kA or other equivalent device.
4
Overload thermal relay with operation class 10A + fuses aM (motor starting) or motor protection magneto-thermal switch with operation class 10A.
16
Figure 18
Protection
• Built-in automatic reset
thermal-amperometric pro-
tection (motor protector)
• Short circuit protection
(must be supplied by the
3
installer)
• Thermal protection (must
4
be supplied by the instal-
ler)
• Short circuit protection
(must be supplied by the
installer)
NOTICE:
• Only use dynamically balanced motors with a half-sized key in the
shaft extension (IEC 60034-14) and with normal vibration rate (N).
• The mains voltage and frequency must agree with the specifica-
tions on the data plate.
• Only use single-phase or three-phase motors whose size and
power comply with the European standards.
and
In general, motors can operate under the following mains voltage toler-
ances:
Frequency Hz
50
60
Use cable according to rules with 3 leads (2+earth/ground) for single
phase versions and with 4 leads (3+earth/ground) for three phase ver-
sion.

4.3 Install the pump

4.3.1 Mechanical installation

Check the following before installation:
• Use a concrete of compressive strength class C12/15 which
meets the requirements of exposure class XC1 to EN 206-1.
• The mounting surface must have set and must be completely hor-
izontal and even.
• Observe the weights indicated.
Mount the unit to a foundation
For information about the pump base and anchor holes, see
20 .
Check that the foundation has been prepared in accordance with the
dimensions given in the outline drawing/general arrangement drawing.
1. Position the pump set on the foundation and level it with the help
of a spirit level that is placed on the shaft and discharge nozzle.
The permissible deviation is 0.2 mm/m.
2. Remove the plugs covering the ports.
3. Align the pump and piping flanges on both sides of the pump.
Check the alignment of the bolts.
4. Fasten the piping with bolts to the pump. Do not force the piping
into place.
5. Use shims (2) for height compensation, if necessary.
Always fit shims, if any, immediately to the left and right of the
foundation bolts (3) between the baseplate/foundation frame and
the foundation. For a bolt-to-bolt distance (L) > 800 mm, fit extra
shims (2) halfway between the bolt holes.
6. Make sure that all shims lie perfectly flush.
7. Insert the foundation bolts (3) into the holes provided.
8. Use concrete to set the foundation bolts (3) into the foundation.
9. Wait until the concrete has set firmly, and then level the base-
plate.
10. Tighten the foundation bolts (3) evenly and firmly.
Note:
• For baseplates, it is recommended to grout the baseplate with
low-shrinkage concrete.
• If the transmission of vibrations can be disturbing, provide vibra-
tion-damping supports between the pump and the foundation.
Mount the pump to a base frame
Be sure to check that the following are adhered to:
• Solid base frame which does not twist or vibrate during operation
(resonance).
• Mounting surfaces of the pump feet and the motor on the base
frame must be flat (machining is recommended).
• Safe fastening of pump and motor must be guaranteed.
e-NSC Installation, Operation, and Maintenance Manual
Phase ~ UN [V] ± %
1 220 – 240 ± 6
3 230/400 ± 10
400/690 ± 10
1 220 – 230 ± 6
3 220/380 ± 5
380/660 ± 10
Figure