Preparing The Installation - Lorentz PSk2-7 Manual De Instalación Y Operación

9.2.3 Preparing the installation

To lower the pumps into the borehole, a crane or hoist
is required. You need also two damps and ropes to lift
components.
All parts have to be strong enough to withstand the weight
of the pump, the motor, the motor cable and the pipe
system.
It is also helpful to lower a pump dummy into the borehole
before you lower the pump to make sure that the hole
is completely free and the pump can slide into the hole
without obstructions.
WARNING – Before starting any work on
the pump/motor, make sure that the
electricity supply has been switched off
and that it cannot be accidentally
switched on!
WARNING – Never stand under suspended
loads.
CAUTION – Before starting the assembly,
make sure that all parts are delivered and
have not been damaged during transport.
CAUTION – Pay attention to the label on
the motor if the liquid in the motor need
to be checked, filled up or if the motor
needs to get completely refilled.
CAUTION – Be careful not to bend the
pump, take particular care with pumps
with higher numbers of stages. Make sure
that the pump never stands on the motor
cable, that the cable does not get jammed
or damaged by sharp ledges or that the
cable is not pulled or jerked where it
enters the motor.
Pump Installation
During the process of lowering the pump into the well the
motor cable has to be fixed properly to the pipe, see "Figure
22: Fixing of the motor cable at a joint and a strait pipe" on
page 44.
Where a plastic pipe is used, the longitudinal stretch of the
pipe under load has to be considered by leaving a sufficient
gap between the pipe and the cable!
The cable should be fixed with water-resistant tape. It is a
good installation practice to form a loop with the motor
cable near the pump and repeat it about every 40 m / 130 ft
along the riser pipe. This will keep any tensile forces away
from the motor cable.
To extend the motor cable pay attention to chapter "9.1.2
Cable Splicing" on page 38.
Round off the edges of a flange to prevent damage to the
cable. Do not fix the cable tightly. Leave space for the pipes
to expand. The cable needs to get fixed every 3 m.
NOTE – Measuring and noting down the
distances between the fixing will help to
lower the pump to the right depth.d have
not been damaged during transport.
43