Lowara ESHE Series Installation, Operation And Maintanance Manual page 19

1. Position the pump set on the foundation and
level it with the help of a spirit level that is
placed on the discharge port.
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 for height compensation, if necessa-
ry.
6. Tighten the foundation bolts evenly and firmly.
Note:
• If the transmission of vibrations can be disturb-
ing, provide vibration-damping supports between
the pump and the foundation.
4.3.2 Piping checklist
Check that the following are adhered to:
• The suction lift line has been laid with a rising
slope, at positive suction head line with a down-
ward slope towards the pump.
• The nominal diameters of the pipelines are at
least equal to the nominal diameters of the pump
ports.
• The pipelines have been anchored in close prox-
imity to the pump and connected without trans-
mitting any stresses or strains.
CAUTION:
Welding beads, scale and other impuri-
ties in the piping damage the pump.
• Free the piping from any impurities.
• If necessary, install a filter.
4.3.3 Electrical installation
1. Remove the screws of the terminal box cover.
2. Connect and fasten the power cables according
to the applicable wiring diagram.
For wiring diagrams, see
The diagrams are also available on the back of
the terminal box cover.
a) Connect the ground (earth) lead.
Make sure that the ground (earth) lead is longer
than the phase leads.
b) Connect the phase leads.
3. Mount the terminal box cover.
NOTICE:
Tighten the cable glands carefully to ensure pro-
tection against cable slipping and humidity en-
tering the terminal box.
4. If the motor is not equipped with automatic reset
thermal protection, then adjust the overload pro-
tection according to the list below.
Figure 13 (page 330).
– If the motor is used with full load, then set
the value to the nominal current value of
electric pump (data plate)
– If the motor is used with partial load, then set
the value to the operating current (for exam-
ple measured with a current pincer).
– If the pump has a star-delta starting system,
then adjust the thermal relay to 58% of the
nominal current or operating current (only for
three-phase motors).
5 Commissioning, Startup,
Operation, and Shutdown
Precautions
WARNING:
• Make sure that the drained liquid
does not cause damage or injuries.
• The motor protectors can cause the
motor to restart unexpectedly. This
could result in serious injury.
• Never operate the pump without the
coupling guard correctly installed.
CAUTION:
• The outer surfaces of the pump and
motor can exceed 40ºC (104ºF) dur-
ing operation. Do not touch with any
part of the body without protective
gear.
• Do not put any combustible material
near the pump.
NOTICE:
• Never operate the pump below the minimum rat-
ed flow, when dry, or without prime.
• Never operate the pump with the delivery ON-
OFF valve closed for longer than a few seconds.
• Never operate the pump with the suction ON-
OFF valve closed.
• Do not expose an idle pump to freezing condi-
tions. Drain all liquid that is inside the pump. Fail-
ure to do so can cause liquid to freeze and dam-
age the pump.
• The sum of the pressure on the suction side
(mains, gravity tank) and the maximum pressure
that is delivered by the pump must not exceed
the maximum working pressure that is allowed
(nominal pressure PN) for the pump.
• Do not use the pump if cavitation occurs. Cavita-
tion can damage the internal components.
5.1 Fill the pump
For information about additional pump connections,
see Figure 14 (page 331).
Installations with liquid level above the pump
(suction head)
For an illustration that shows where pump plugs are,
see Figure 15 (page 332).
1. Close the on-off valve located downstream from
the pump.
2. Remove the fill plug (2) and open the on/off
valve upstream until the water flows out of the
hole.
en - Original instructions
19