Flowserve PLEUGER - Manual (Page 5)

PLEUGER STANDARD USER INSTRUCTIONS ENGLISH 71569293 01-13
Page 5 of 40
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If complete protection is not possible, access to such
devices must be limited to the maintenance staff who
must be informed specifically about the special
dangers by warnings and corresponding signs.
The measures listed above must be applied if the
temperatures in a limited access zone exceed
80 ºC (175 ºF) or fall below -5 ºC (23 ºF), or if the
regional limit values are exceeded.
ADDITIONAL SAFETY NOTES
In addition to the safety notes listed in the main Safety
section, special safety notes in all other sections must
also be observed, eg those for private use.
COMMISSIONING
Prior to each commissioning after installation,
maintenance or repair, follow the instructions and
notes in section 8, Commissioning, switching on,
operation and switching off.
Notes directly attached to the unit must be observed
without fail. These include:

Marking of connections

Rating plate

Rotational direction
HAZARDOUS LIQUIDS
Units handling hazardous liquids must be
decontaminated.
INFLAMMABLE FLUIDS
When the pump is handling hazardous liquids care must
be taken to avoid exposure to the liquid by appropriate
siting of the pump, limiting personnel access and by
operator training. If the liquid is flammable and or
explosive, strict safety procedures must be applied.
When pumping dangerous fluids, no packing
seals must be used.
PREVENT EXCESSIVE EXTERNAL
PIPE LOAD
In horizontally arranged pump units, the pump must not
be used as support for suction or pressure pipework.
Arrange compensators in such a way that the forces
caused by internal pressure do not act upon the pump
flange unless approved in writing by Flowserve.
ROTATIONAL DIRECTION OF THE
MOTOR
The rotational direction of each motor can be found in
the data sheet and or the connection data sheet.
As testing the rotational direction by short startup in
dry conditions is not permitted and as by design the
rotational direction of the motor cannot be determined
when the pump unit is completely mounted, the
rotating field of the power supply must be known. If
necessary, it must be determined using a rotating
field measurement device.
If the pump unit is operated with incorrect rotational
direction, the delivery output is reduced and pump
damage is possible.
OPERATION OF THE PUMP UNIT
The pump unit may only be operated if the unit is
completely mounted, the motor is completely filled
with the prescribed amount of filling fluid and it is
submerged sufficiently into the delivery medium.
Never let the submersible motor pump run dry.
Switching on, including for test purposes, is never
allowed if the pump is not submerged.
For the minimum submersion depth in the delivery
medium, refer to the provided data sheet or ask
Flowserve.
Non-observance can cause the following dangers:

Failure of important system functions

Failure of prescribed methods for maintenance
and upkeep

Danger to persons due to electrical, mechanical
or chemical impact

Danger to the environment by leakage when
delivering hazardous media
OPERATION OF THE PUMP UNIT
Operation with a flow volume that is above average
or does not cause counter-pressure to the pump can
cause a motor overload and cavitation in the pump.
Low flow rates can cause shortened service life of the
pump, overheating of the pump, instability, cavitation
and vibration.
The duty point for which the pump unit has been
designed can be found in the data sheet of the pump.
SWITCHING ON THE PUMP UNIT
After having completely installed the pump unit, close
the outlet valve apart for a small gap to bleed the
riser pipeline. (If the system is equipped with an air-
release valve at the highest point of the riser pipeline,
the outlet valve remains closed.) After switching on,
the pressure at the pressure gauge must be higher
than the pumping head specified in the data sheet,
minus the water depth.