Operating Instructions
Progressive Cavity Pump
Assembly and Installation
Dokument
document
Blatt
sheet
Ausgabe
issue
OM.INS.01e
2 (2)
A / 10.01.95
5.2.3
Protective and Controlling Equipment
Information on equipment of this nature, where fitted,
is provided in the data sheet, Point 9. Consult the
attached manufacturer’s specifications, Point 10, for
instructions on assembly and installation.
5.2.4
Electric Connection of Electric Motor
and Frequency Converter
The electric connections must be
established in accordance with the
manufacturer’s specifications,
Point 10, as well as the safety speci-
fications applying at the installation site.
The mains voltage and frequency must
match the ratings indicated on the type
and rating plates.
•
Switch on electric motor „direct-on-line“
CAUTION
An increased starting torque is necessary due
to the clamping between the rotor and stator
conveying elements. This means the electric motors
that drive the progressive cavity pumps must always
be switched on directly. As a rule, star-delta startup
is not possible unless special arrangements have
been made with seepex.
Three-phase cage motor
Delta connection
Star connection
Terminal
board
low . . .
high . . .
. . .
voltage indicated on rating plate
•
Speed regulation via frequency inverter
When progressive cavity pumps with frequency-
controlled drives are started up problems may occur
due to unsuitable or wrongly set frequency inverters.
For this reason we recommend the purchase of the
complete drive, including frequency inverter, from
seepex, so that the frequency inverter can be tuned
on the seepex test field along with a trial run.
Ensure that customer-supplied frequency inverters
comply with the starting torque and running power
specified in the appended data sheet,
Point 9.
CAUTION
Consult the appended document TI.FRU.01, see
Point 9, for further information on the electric
connection and the setting of frequency inverter
and variable-speed motor.
5.2.5
Piping
5.2.5.1
Suction and Pressure Flanges
The position, nominal width and standard of the
suction and pressure flange of the progressive cavity
pump are specified in the dimension drawing, Point
9, and data sheet, Point 9. Always observe the
rotational direction and flow direction defined in Point
6.2.5.
5.2.5.2
Piping Dimensioning
CAUTION
The pipe diameters on the suction and pressure
sides must be dimensioned in accordance with the
customer’s pressure-loss calculation in such a way
that the pressures specified in the data sheet, Point
9, are not exceeded. The nominal width of the
suction pipe should at least match that of the pump
suction flange.
5.2.5.3
Residue-free Piping
CAUTION
Prior to starting up the pump, ensure that all pipelines
are free from foreign bodies. Installation residues
(such as weld spatter, screws, steel chips etc.) will
lead to damage of the seepex pump for which
guarantee claims will not be accepted.
5.2.5.4
Tension-free Mounting
CAUTION
Pipelines and other components requiring to be
connected with the pump must be mounted without
stresses.
5.2.5.5
Fluid Connections for Optional Extras
Consult the data sheets, Point 9, for information
regarding the optional extras, if any, that are fitted.
The technical description is given under Point 9.
