88
When the speed range between this borders is
not sufcient for your application, please discuss
it with PACKO. In this case we can look for a
special pump selection.
Motors to be connected to a frequency converter
must be ordered with built-in PTC thermal
protection.
Not only the frequency, but also the installation
of the right voltage is very important. At 50 Hz
and 60 Hz, the voltage on the nameplate of
the motor must unconditionally be followed. At
lower frequencies, the voltage must be lowered
proportional.
5.4.
Pumps that have to start and stop often
Pumps that have to start and stop often are
subject to extra wear because certain parts are
subject to repetitive shock loading. To start and
stop a pump often must be avoided as much as
possible.
Every time a motor starts, it draws a large electric
current (starting current) that heats up the motor.
Pumps that have to start and stop more than
5 times an hour must be ordered with a motor
with built-in PTC thermal protection. When
the pump has to start and stop often, this must
be mentioned when ordering the pumps so that
the motor can be selected accordingly.
5.5.
Temporary decommissioning
After switching off the pump in the case of
shutting down the installation, the suction and
discharge valves should be closed. For pumps
with a heating jacket on the pump casing or the
back-plate, this heating also has to be turned off.
If the liquid remains in the installation, the valves
should be locked so that they cannot be opened
in error.
When there is a risk of frost, in the case of pro-
longed stoppages or when the liquid can coagu-
late inside the pump, the pump is to be emptied,
cleaned and protected against frost.
5.6.
Permanently decommissioning
Although Packo pumps are extremely durable,
after many years of service, a moment comes
when the pump will be permanently put out of
service. Apart from the seals and smaller parts
of the motor, the pump is completely built in
metal. This metal can be recycled via the scrap
trade. With smaller pumps, the motor fan and
fan cover are made of plastic, these can also
be recycled. The seals, and electronic compo-
nents of an optional frequency converter built
on the motor, must be scraped and disposed of
in accordance with the applicable local environ-
mental legislation.
5.7.
Directives in case of failure
Loud noises, severe vibrations or leakage indi-
cate a malfunction or failure of the pump. Try to
nd the reason for failure. If there is a malfunc-
tion you do not recognize or you cannot repair
yourself, PACKO must be notied immediately.
During the warranty period, you are not allowed
to make repairs yourself without previous per-
mission of PACKO.
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