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10 5 Water detection sensor installation
This section is for the installation of the LORENTZ water de-
tection sensor only. This guide is not universally applicable
for sensors of other suppliers/manufacturers.
LORENTZ recommends using a water detection sensor to
protect the pump against water shortage.
WARNING – Running the pump
completely dry will damage the
pump within seconds and void the
warranty The purpose of the water
detection sensor is to sense the loss
of water and turn the pump off
before it can run dry
The sensor has to be installed close to the pump inlet.
If the controller detects dry running it will stop the pump.
Following a run dry situation the pipeline must be refilled
manually. Check the pipeline for leakage.
The controller will delay the restart after the pipeline has
been refilled for 15 minutes.
Figure 19: Technical drawing of adaptor (in mm)
Ø 50 ± 0.5
G1"
17 ± 0.1
35 ± 0.1
Ø 20 ± 0.2
10 +0.1
Ø 30 -0.2
Ø 34 ± 0.1
Figure 20: Adaptor welded on inlet pipeline
adaptor
inlet pipe
BERNT LORENTZ GmbH & Co. KG Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29, www.lorentz.de
All specifi cations and information are given with good intent, errors are possible and products may be subject to change without notice. Pictures may
differ from actual products depending on local market requirements and regulations.
10 5 1 Steel/stainless steel pipe
Step 1: Weld the adapter to the inlet pipeline – The
material of the adaptor must match the material of the
pipe. Both stainless steel and steel adaptors are available
from LORENTZ.
Step 2: Assemble the water sensor housing to the
adapter water sensor housing to adaptor – Fasten
the sensor housing tightly and make sure that there is no
leakage at the PTFE washer. Assemble the vent valve to
the water sensor housing. The thread must be sealed; for
example, PTFE tape can be used as sealant.
Step 3: Fit the water sensor into the water sensor
housing Make sure there is no leakage.
Step 4: Connect the water sensor to the water
sensor input NC and COM of the PSk2 Controller, cf.
chapter "9.4.3 Terminal description" on page 13. The
polarity does not matter.
Step 5: Fill the inlet pipeline, until only water flows out
of the vent valve. There must be no air bubbles left in the
water. Close the vent valve after venting.
1.5x45°
surfaces
Rz 12.5
2 ± 0.1
edges without tolerances
2x45°
-0.3
-0.1
+0.3
Figure 21: Mounted probe housing
vent valve
Figure 22: Mounted water sensor
PTFE tape
sensor housing
PTFE washer
21
NOTE: The electrode sensor must be
cleaned regularly to prevent failure
caused by scale formation on the
two electrodes Interval time
depends on your water quality
Sun. Water.
Life.
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