Lowara ESHS ATEX, Installation, Operation And Maintenance Manual

Page: 24 / 102

en - Original instructions
24
disassemble the electric pump but contact
Xylem or the Authorised Distributor.
2. Remove the screws of the terminal box cover.
3. Connect and install the power cables according
to the applicable wiring diagram. For wiring
diagrams, see the Installation, Operating, and
maintenance manual for the motor.
a) Connect the ground (earth) lead. Make sure
that the ground (earth) lead is longer than
the phase leads.
b) Connect the phase leads.
4. Install the terminal box cover.
NOTICE:
Tighten the cable glands carefully to ensure
protection against cable slipping and humidity
entering the terminal box.
5. If the motor is not equipped with automatic reset
thermal protection, then adjust the overload
protection according to the list.
- 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
example 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
40°C (104°F)
during 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 rated 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 conditions. Drain all liquid
that is inside the pump. Failure to do
so can cause liquid to freeze and
damage 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. Cavitation can damage the
internal components.
5.1 Fill the pump
For information about additional pump connections,
see Figure
13 on page 97.
Installations with liquid level above the pump
(suction head)
For an illustration that shows where pump plugs are,
see Figure
14 on page 98.
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.
a) Close the fill plug (2).
Installations with liquid level below the pump
(suction lift)
For an illustration that shows where pump plugs are,
see Figure
15 on page 100.
1. All pipe system empty:
a) Open the on-off valve located upstream from the
pump.
b) Remove the fill plug (2) and use a funnel to fill
the pump through the fill hole until water flows
out of this hole.
c) Tighten the fill plug (2).
2. Filled discharge pipe system:
a) Open the on-off valve located upstream from the
pump and open the on-off valve downstream.
b) Remove the fill plug (2) until water flows out of
this hole.
c) Tighten the fill plug (2).
5.2 Check the rotation direction (three-
phase motor)
Follow this procedure before start-up.