Varisco S.p.A.
Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALY
Tel.+39.049.8294111 Email: [email protected]
Fax+39.049.8076762 Web: www.variscospa.com
10
•
Make sure that the motor is not running and that it cannot be accidentally started.
•
Move the unit slowly and carefully, especially if over irregular ground.
Overturning hazard
!
•
Make sure that the position in the new resting location is steady; lock all stopping devices
on wheels/rolls, in order to avoid unwanted motion.
•
Consider the reaction forces and the movements of flexible piping occuring during pump
working.
•
Possibly fix the unit with additional wedges.
5.2 STORAGE
The pumps, unless otherwise agreed, are protected during transport.
In case of prolonged storage prior to the assembly:
•
Stator: In case of prolonged stop, the rotor may permamently buckle the stator on the contact
surface (compression-set). This requires a greater pickup torque. Therefore, remove the
stator, pack it in order to shelter it from light and air, and store it in a cool, dry place.
•
Rotor: Rest it on wooden blocks and cover it for protection against mechanical damage.
•
Shaft packing: Remove the gland, and grease the shaft.
•
Stainless steel parts: No protection needed.
•
Other non-painted pump parts: Grease.
•
Motors: see manufacturer’s instructions.
6 ELECTRIC CONNECTION – PIPELINE CONNECTION
6.1 INSTALLATION OF MOTOR
6.1.1 ELECTRIC CONNECTION
The work relating to electric connections shall be carried out by authorized and specialized
personnel, in compliance with local rules and directives issued by the authorities.
Control apparatus must comply with the latest edition of the Machine Directive EEC, Appendix 1,
Chap. 1.2 (Control apparatuses).
The power supply must be equipped with a thermal magnetic overload cutout, or a fuse, and a
compulsory earthing system, as mentioned above.
The electric wire shall be double-insulated and fire-retardant and with an adequate cross-section for
every phase. It is necessary to properly ground the circuit, and, in compliance with the law and the
rules of good technique, it is forbidden to connect the Neutral with the Ground.
Before starting the pump, check:
•
tension, frequency and number of phases conform with the electric motor
•
motor connections (star/triangle) conform with the alimentation available.
•
wire section conform with the amperage concerned.
6.1.2 PUMP-MOTOR COUPLING
6.1.2.1 CLOSE COUPLED VERSION
The coupling of a progressing cavity pump with its motor is not difficult, though problems may
arise since the mechanical seal (or packing) is installed on the hollow shaft which, if not coupled to
the motor/converter, can easily break the seal.
