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en - Original instructions
standstill as well as at operating temperature
and under inlet pressure.
5. Re-tighten screws of the support and pump foot
without transmitting any stresses and strains.
Dial gauges can be used in the place of ruler and
thickness gauge.
Contact the local sales and service representative
for any requests or information.
NOTE: Check alignment of coupling again in opera-
tion warm condition and on system pressure if avail-
able and correct, if necessary. Be sure that the unit
can be easily turned by hand.
NOTICE:
Improper alignment of the unit can lead to damages
at coupling and unit.
Install the coupling guard
CAUTION:
Never operate the pump without the cou-
pling guard correctly installed.
'Wire mesh' type
For information see
Figure 17
1. Open and place the guard (1) in a way that it
envelops the bearing cover and the supporting/
adjusting ring (6).
2. Press the supporting/adjusting ring (6) axially to
the motor.
3. Screw the fixing devices (2).
'Shell' type
For information see
Figure 18
1. Place the coupling guard — lower half (2) using
the fixing devices — low (4).
2. Open and insert the supporting/adjusting ring
(6) with slot downward and press it axially to the
motor.
3. Place the coupling guard — upper half (1) using
the fixing devices — up (3).
4. Screw the fixing devices — side (5).
4.3.4 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
404. 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.
22
on page 398.
on page 400.
Figure 20
on page
– 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 21
on page 405.
Installations with liquid level above the pump
(suction head)
For an illustration that shows where pump plugs are,
see
Figure 22
on page 407.
1. Close the on-off valve located downstream from
the pump.
2. Remove the fill (3) or gauge plug (1) and open
the on/off valve upstream until the water flows
out of the hole.
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