Installation Depth; Removal - Lorentz PSk2-7 Manuel D'installation Et De Fonctionnement

9.2.4 Installation Depth

Make sure that the pump unit is suspended properly and is
not in contact with sand and mud from the well bottom. It
is recommended to install the pump above the filter zone
(= water entry zone) of the well to keep the sand content
in the water low and ensure proper cooling of the motor, cf.
„Figure 23: Installation depth"below.
CAUTION – The pump must be submerged
completely. Never let the pump run dry.
Dry running will damage the pump and
void the warranty. LORENTZ prescribes a
dry run protection for every pump system.
CAUTION – If the pump does not hang
above the filter zone a flow sleeve is
necessary.
Figure 23: Installation depth
L4
Filter
Pump Installation

9.2.5 Removal

If you have to remove the pump system it is the same prin-
ciple as the installation in reverse order. When removing the
pump the pipes will be full of water and will be heavier.
CAUTION – When you lift the pump
system out of the well the pipes are full
of water. This causes additional weight.
In the table below you can see the additional weight of the
water per meter pipe length.
Table 9: Additional weight per meter pipe length
Pipe diameter
[in] [kg/m]
2
2.5
3
4
5 12.7
6 18.4
L1: Installation depth
L2: Max immersion depth = 70m
L3: Min immersion depth = 1m
L4: Distance to filter
L5: Depth to highest water level
L6: Depth to lowest water level
Additional weight
[lb/ft]
2.0 14.5
3.2 23.1
4.6 33.3
8.2 59.3
91.9
133.1
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