3
the lifting handle, do not use the cables or
discharge hose. All fixing screws and bolts must
be securely fasted before lifting. Human injury
may appear if above is not secured.
After a long period of storage the pump must be
inspected carefully. Rotate the impeller by hand
before start-up and check carefully seals and
cable entry
Installation
When installing the pump, reduce the risk of
accidents, be aware that the machine is
extremely heavy and contain electrical open
wires.
Before starting the installation, secure that all
screws for the lift handle, stator and volute fixing
bolts are safety tighten.
Lifting chains, cranes etc. must always be
designed to encounter without cracked the
weight of the pump. For safety reasons never
walk under suspended load.
Discharge connection bracket -
DCB
Place the base elbow (DCB) at the bottom of
the sump. If one
pump is installed,
place the pump in
the center of the
tank. Fit the guide
tubes to the upper
guide bracket so
they are in an
accurate vertical
and parallel position
to each other.
Connect the discharge pipe to the DCB and
mount eventual the pipe with a non return valve
and gate valve which suits the flow velocity from
the pump.
The lifting tackle must be installed directly at the
point above the center of gravity of the pump
while the pump automatically will release from
the DCB (which is appropriate shaped for this
purpose) when lifted vs. fasten on the DCB
when lowered.
Dry pit installation
PX series with cooling jacket can be installed
dry can be supplied with adjustable support.
The support consists of three legs of telescopic
type. The suction pipe
can be connected in
either direction by
changing over the
location of the legs. The
legs after adjusting are
fixed with two screws to
lock the position.
Secure the legs by
bolting in concrete.
The suction connection
pipe can be connected vertical under the pump.
The motor unit is easier to remove and fit
in place again if the suction pipe is
equipped with a drain valve. This can be
opened when the motor is going to be
fitted or removed.
The discharge pipe should be mounted
with a drain as well, in order to let out air
under the first start-up. Afterwards it can
be fitted with a manometer to measure the
pressure.
Before start, check carefully the cables for
defects and check the level of coolant in
the cooling jacket.
Portable version / installation
This version needs
extra attention
while operating.
The pump can be
supplied with a
support ring.
Place the pump on
a firm surface and
keep the cables
straight, secure
that cable are not nipped.
If risk of overturning, place and fit the
pump on a steel plate.
When hoses are used as discharge
connection, remember that friction losses
are higher than in a pipe and flow might be
less than expected.
Venting of the volute
After lowering the pump into a sump full of
water, an air lock may occur in the volute
and cause pumping problems. In this case,
raise the pump in the medium and then
lower it again. If necessary repeat this
venting procedure.
If the problem insists then we can drill a
hole 2-3mm on the vent’s plug.
Especially for the pumps of dry installation
it is necessary to venting them again
(when have been installed at the final
position) by the appropriate hole at the
volute of the pump.
Electrical connections
The electrical installation must be
inspected by authorized electrician before
switching-on.
Make sure that the electrical terminals or
starting equipment is installed in such way
that it cannot be flooded. The electrical
installation must apply to national
regulations.
All pumps are supplied with built-in thermal
switches in the stator windings. These are
marked F1, F2 and must always be
connected in series to the control circuit of
control panel.
D is connected to a moisture sensor which
is located between the oil chamber and
stator housing. This sensor should be
connected to a conductive liquid level relay
in the control panel. An alarm should be
given in event of moist. Your local
PXFLOW representative can supply you
with the conductive liquid level relay
(optional).
Make sure that the power supply, voltage,
frequency and starting method
corresponds to the nameplate data fitted
on the pump.
The motor can operate by voltage
tolerances at +/- 5%. The motor might be
overloaded and burned out if this is
exceeded.
About power supply cable, and control
cable connections see to motor winding
connection schemes in this manual.
•
Direct online starting DOL
•
Star-Delta starting Y-Δ
Starting equipment on the control panel,
must be provided with over current
protection sensitive to phase failure. A
3phase asymmetry control relay is
recommended, adjusted to 15% phase
asymmetry
The power supply should be fused with
low-blow fuses.
15 Starts per hour (regularly spaced) are
permitted
Replacing the power cable
If the cable has been compressed or
damaged it must be replaced to avoid
water entry.
When changing the cable always change
the rubber joint-ring too, in the entry of it.
Never change dimensions from the original
one, as water may enter the motor.
If the same cable is re-used due to any
repair work, always cut away a piece at the
cable entry in order to seal on a non
compressed cable sheath.
For safety reasons the grounded conductor
should be longer than the others, these of
the phases. If the motor cable is
accidentally wrenched off, the earth
conductor should be the last to break away
from its terminal. This applies to both ends
of the cable.
Electromagnetic Compatibility,
EMC
The pump does not generate any electric
noise EMC, which can infect on other
equipment. However, if the pump is power
supplied via frequency inverter, power
cables might need screening.
The pump apply to directive
EN89/336/EEC regarding EMC.
WARNING! The pump unit doesn’t go with
the base.
The base as also others hydraulics
accessories for the installation and the
connection of the pump with the system
can be supplied from our company.
WARNING! Never remove the support
ring, human contact might occur and
make injury.
WARNING! For the safety operation it
is necessary to have succeeded the
appropriate support of the pump unit as
do not have any accident mainly at the
start of the pump.
CAUTION! All electrical equipment
must always be earthed (grounded).
This applies both to the pump and to
any monitoring equipment.
3
the lifting handle, do not use the cables or
discharge hose. All fixing screws and bolts must
be securely fasted before lifting. Human injury
may appear if above is not secured.
After a long period of storage the pump must be
inspected carefully. Rotate the impeller by hand
before start-up and check carefully seals and
cable entry
Installation
When installing the pump, reduce the risk of
accidents, be aware that the machine is
extremely heavy and contain electrical open
wires.
Before starting the installation, secure that all
screws for the lift handle, stator and volute fixing
bolts are safety tighten.
Lifting chains, cranes etc. must always be
designed to encounter without cracked the
weight of the pump. For safety reasons never
walk under suspended load.
Discharge connection bracket -
DCB
Place the base elbow (DCB) at the bottom of
the sump. If one
pump is installed,
place the pump in
the center of the
tank. Fit the guide
tubes to the upper
guide bracket so
they are in an
accurate vertical
and parallel position
to each other.
Connect the discharge pipe to the DCB and
mount eventual the pipe with a non return valve
and gate valve which suits the flow velocity from
the pump.
The lifting tackle must be installed directly at the
point above the center of gravity of the pump
while the pump automatically will release from
the DCB (which is appropriate shaped for this
purpose) when lifted vs. fasten on the DCB
when lowered.
Dry pit installation
PX series with cooling jacket can be installed
dry can be supplied with adjustable support.
The support consists of three legs of telescopic
type. The suction pipe
can be connected in
either direction by
changing over the
location of the legs. The
legs after adjusting are
fixed with two screws to
lock the position.
Secure the legs by
bolting in concrete.
The suction connection
pipe can be connected vertical under the pump.
The motor unit is easier to remove and fit
in place again if the suction pipe is
equipped with a drain valve. This can be
opened when the motor is going to be
fitted or removed.
The discharge pipe should be mounted
with a drain as well, in order to let out air
under the first start-up. Afterwards it can
be fitted with a manometer to measure the
pressure.
Before start, check carefully the cables for
defects and check the level of coolant in
the cooling jacket.
Portable version / installation
This version needs
extra attention
while operating.
The pump can be
supplied with a
support ring.
Place the pump on
a firm surface and
keep the cables
straight, secure
that cable are not nipped.
If risk of overturning, place and fit the
pump on a steel plate.
When hoses are used as discharge
connection, remember that friction losses
are higher than in a pipe and flow might be
less than expected.
Venting of the volute
After lowering the pump into a sump full of
water, an air lock may occur in the volute
and cause pumping problems. In this case,
raise the pump in the medium and then
lower it again. If necessary repeat this
venting procedure.
If the problem insists then we can drill a
hole 2-3mm on the vent’s plug.
Especially for the pumps of dry installation
it is necessary to venting them again
(when have been installed at the final
position) by the appropriate hole at the
volute of the pump.
Electrical connections
The electrical installation must be
inspected by authorized electrician before
switching-on.
Make sure that the electrical terminals or
starting equipment is installed in such way
that it cannot be flooded. The electrical
installation must apply to national
regulations.
All pumps are supplied with built-in thermal
switches in the stator windings. These are
marked F1, F2 and must always be
connected in series to the control circuit of
control panel.
D is connected to a moisture sensor which
is located between the oil chamber and
stator housing. This sensor should be
connected to a conductive liquid level relay
in the control panel. An alarm should be
given in event of moist. Your local
PXFLOW representative can supply you
with the conductive liquid level relay
(optional).
Make sure that the power supply, voltage,
frequency and starting method
corresponds to the nameplate data fitted
on the pump.
The motor can operate by voltage
tolerances at +/- 5%. The motor might be
overloaded and burned out if this is
exceeded.
About power supply cable, and control
cable connections see to motor winding
connection schemes in this manual.
•
Direct online starting DOL
•
Star-Delta starting Y-Δ
Starting equipment on the control panel,
must be provided with over current
protection sensitive to phase failure. A
3phase asymmetry control relay is
recommended, adjusted to 15% phase
asymmetry
The power supply should be fused with
low-blow fuses.
15 Starts per hour (regularly spaced) are
permitted
Replacing the power cable
If the cable has been compressed or
damaged it must be replaced to avoid
water entry.
When changing the cable always change
the rubber joint-ring too, in the entry of it.
Never change dimensions from the original
one, as water may enter the motor.
If the same cable is re-used due to any
repair work, always cut away a piece at the
cable entry in order to seal on a non
compressed cable sheath.
For safety reasons the grounded conductor
should be longer than the others, these of
the phases. If the motor cable is
accidentally wrenched off, the earth
conductor should be the last to break away
from its terminal. This applies to both ends
of the cable.
Electromagnetic Compatibility,
EMC
The pump does not generate any electric
noise EMC, which can infect on other
equipment. However, if the pump is power
supplied via frequency inverter, power
cables might need screening.
The pump apply to directive
EN89/336/EEC regarding EMC.
WARNING! The pump unit doesn’t go with
the base.
The base as also others hydraulics
accessories for the installation and the
connection of the pump with the system
can be supplied from our company.
WARNING! Never remove the support
ring, human contact might occur and
make injury.
WARNING! For the safety operation it
is necessary to have succeeded the
appropriate support of the pump unit as
do not have any accident mainly at the
start of the pump.
CAUTION! All electrical equipment
must always be earthed (grounded).
This applies both to the pump and to
any monitoring equipment.
3