Lorentz PSk3-7 Specification sheet

The Solar Water Pumping Company
Manual for Installation and Operation
Manuel d'installation et d'utilisation
Manual de instalación y operación
Manual for Installation and Operation
EN
photo may dier from actual product
PSk3-7 to PSk3-15
Hybrid Solar Pumping System

32
v220520
EN ENTable of Content
1 Introduction .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .4
2 Installation overview .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .5
2.1 Registration of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.2 PV and Controller Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.3 Electrical installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.4 Pump Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.5 Feature conguration with LORENTZ Assistant. . . . . . . . . . . . . . . . . . . . . . . . . .8
3 PSk3 and LORENTZ Assistant .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...10
4 Product Information .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...11
4.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.2 Technical Data of the PSk3 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.3 Technical requirements for the pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.4 Naming convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..14
4.5 Storage of pump system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.6 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5 Safety Instructions .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...16
6 Pump System Sizing & Layout Diagrams. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...18
6.1 Pump System Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
6.2 System Layout: Submersible Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..20
6.3 System Layout: Surface Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..21
6.4 Solar-diesel system sizing considerations . . . . . . . . . . . . . . . . . . . . . . . . . . ..22
7 Controller Installation . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .25
7.1 Controller Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..25
7.2 Controller Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..25
7.3 Mounting, Space and Ventilation Requirements . . . . . . . . . . . . . . . . . . . . . . . ..27
7.4 Wiring the controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
7.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..46
8 Pump Installation.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .49
8.1 General instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
8.2 Submersible Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
8.3 Surface Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..63
9 Pump Accessories Installation .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ...71
9.1 Well probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..71
9.2 Water detection sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
9.3 Water meter installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
9.4 Level sensor installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
9.5 Water Level Management Solution (WLMS) installation . . . . . . . . . . . . . . . . . . . . . .77
9.6 Pressure sensor installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..78
9.7 Float Switch (Full Tank Shut-o) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
9.8 Sacrical Anode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
9.9 PV Disconnect 1000-40-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
9.10 PV Combiner 1000-125-4 for PSk3-7 to PSk3-15 . . . . . . . . . . . . . . . . . . . . . . . . .82
9.11 PV Protect 1000-125 for PSk3-7 to PSk3-15 . . . . . . . . . . . . . . . . . . . . . . . . . . ..82
9.12 SmartStart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..83
10 Operating the Pump .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .87
10.1 LED Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..88
10.2 Starting the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
10.3 Time delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
10.4 Parameter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..91
11 LORENTZ CONNECTED . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .92
11.1 PSk3 data access and data logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
11. 2 LORENTZ Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
11. 3 LORENTZ Global & PS Commander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..93
12 Troubleshooting. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .94
12.1 Pump does not run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..94
12.2 Pump attempts a restart every 4 minutes . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
13 Service and Maintenance .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .97

Installation overview 54 Introduction
EN EN1 Introduction
Thank you for purchasing a LORENTZ pump system. With PSk3, LORENTZ has set a new standard for
quality, eciency and durability in solar pumping.
Before you begin: All pump systems are equipped with nameplates, which contain all important data. Check
the model numbers of all the components of your system, verify that they are the items that you ordered
and ensure that the packaging is undamaged and complete. To allow best system performance and to avoid
damage, read and follow the installation instructions carefully.
How to use this guide: This manual is for system installation only, follow it closely for a safe installation. The
system layout must be planned beforehand. We advise using the LORENTZ COMPASS software for correct
pump system sizing.
Sites: It is mandatory to register the installation at "Sites" in LORENTZ partnerNET. Sites provides an easy
overview of all installed pump systems, including serial numbers and installation details. This will be essential
information should problems occur and will simplify trouble shooting and warranty topics. You are also
able to register a Site using LORENTZ Assistant. Please refer to the LORENTZ Assistant manual for more
information.
2 Installation overview
This installation overview is provided to familiarize you with the typical steps that are taken when installing a
solar water pumping system. Your particular installation may require the steps to be done in a dierent order.
You should read the whole manual before making your rst installation.
Below you nd a collection of mandatory and optional tools which are useful for installing the pump.
Table 1: Tool list
Mandatory tools Recommended additional tools
Screw driver, PH2 (cover &
shield clamps)
Isolation tester 1000 V (Megohmmeter)
Screw driver, at, 0.6 x 3
mm (Sensor terminals)
Clamp meter for DC current
Wire stripper Crimping tool for non-insulated sleeves
Wrench, 13 mm
(Grounding bolt)
Multimeter (min. 1000V
DC)
LORENTZ Assistant
Android™ App
a WARNING – This installation overview does not substitute the detailed instructions
given in this manual. Read and follow the manual carefully to ensure reliable operation
and long life of the product and to avoid danger to health and life.

Installation overview 76 Installation overview
EN EN
2.1 Registration of components
Before you start the installation please register all components (e.g. Pump end, Motor, Pump Controller) on
Sites in partnerNET (Support, Sites) or by using the LORENTZ Assistant App. This is mandatory and needs to
be done to run the pump.
2.2 PV and Controller Installation
Please follow the manufacturers instructions for PV
installation. Every PV installation must be equipped
with a PV disconnect switch rated for DC. Suitable
switches are available from LORENTZ.
Please refer to "8 Pump Installation" on page 49
for more information on the requirements the PV
disconnect must meet.
Install the controller close to the PV array in a
shaded location to minimize cable length on the
input side.
For detailed information refer to "7.3 Mounting,
Space and Ventilation Requirements" on page 27.
2.3 Electrical installation
1. Pump wiring: The motor must be connected
to the terminals U, V, W, and PE. Observe rotation
direction.
For detailed information refer to "8.2.2 Wiring the
pump" on page 52.
2. Accessories wiring for PSk3-7 and PSk3-15:
Connect a well probe to terminals 1 and 2 (required),
remote control switches to terminals 3 and 4,
water meter to terminals 5 and 6, analog sensors
to terminals 7 and 8 or 9 and 10, water detection
sensor for surface pump to terminals 14, 15 and 16,
Sun Sensor module to terminals 17 and 18.
For detailed information refer to „7.4.1.5 Pump
Accessory Wiring“ on page 40.
3. DC input wiring: Connect the positive terminal
of the PV array to +, the negative terminal to −. The
max. input voltage provided by the PV array must
not exceed the specied max. input voltage of the
product.
4. AC input wiring: Connect the AC input phases to
the L1/L2/L3 and PE terminals.
For detailed information refer to „8 Pump
Installation“ on page 49 and "Table 2: Technical
Data of the PSk3 Controller" on page 12.
l WARNING – Do not ground PV+ or
PV-. Grounding either PV+ or PV- while
using an AC power supply will result
in signicant damage and destroy the
controller.
5. Grounding: A protective earth connection must
be wired to PE .
For detailed information refer to "7.5 Grounding" on
page 46.
2.4 Pump Installation
Submersible pumps: Lower the pump into the water
source with caution, use a safety rope.
For detailed information refer to "8.2 Submersible
Pumps" on page 51.
Surface pumps: Install the surface pump on an
adequate foundation with sucient pipe sizing to
ensure ecient operation. Fill the pump with clean
water prior to starting it.
Depending on your pump system, refer to "8.3
Surface Pumps" on page 63 for detailed
information.

Installation overview 98 Installation overview
EN EN2.5 Feature conguration with LORENTZ Assistant
1. Installation settings: select your controller
and pump unit type and make basic settings (this
is mandatory for perfect operation and data
monitoring).
2. Dashboard: check your pump’s performance in
the last hour, day, month or year
3. Operational settings: if required choose a time
limit or a water limit (e.g. for a low-yielding borehole
or hybrid operation with a smaller diesel generator)
4. Device info: check hardware and rmware
versions

Product Information 1110 PSk3 and LORENTZ Assistant
EN EN3 PSk3 and LORENTZ Assistant
a INFORMATION – LORENTZ Assistant
holds the latest versions of pump system
rmware as well as new features. We
highly recommend that you update
LORENTZ Assistant regularly. LORENTZ
Assistant is free for all users.
LORENTZ Assistant for Android™ is an important tool
to correctly set up LORENTZ pump controllers via a
Bluetooth® connection. Setting up the pump and
mandatory accessories, e.g. Sun Sensor, is required
for full performance and to not void the warranty.
To install LORENTZ Assistant search for "LORENTZ
Assistant" in Google Play Store* or scan the following
QR code which leads you directly to the app in
Google Play Store.
There are applications where the need for water
cannot be met with solar power and water storage
alone. For these cases and if there are specic
seasonal demands, constant pressure or constant
ow requirements, an AC power source can be
directly connected to the PSk3 controller which
seamlessly blends both power sources and supports
the PV power source to meet the customers’
requirements. In cases where no PV power is
available, the system can be powered only via an AC
source.
4 Product Information
4.1 Product Description
LORENTZ PSk3 solar submersible and surface pump
systems are designed to eciently deliver the
highest volumes of water at high eciency.
PSk3-C-SJ submersible and PSk3-CS surface pump
systems are typically used in irrigation projects
and for a wide area of drinking water applications
where they reliably meet the most demanding
requirements, economically, environmentally
friendly and without a grid connection or diesel
generator. The system is composed of a pump, a
pump controller and a PV generator array which is an
aggregation of PV modules connected in series and
in parallel, absorbs solar irradiation and converts it
into electrical energy, providing power for the whole
system.
The pump controller controls and adjusts the
system operation and converts the DC produced
by the PV generator into AC to drive the pump, and
adjusts the output frequency in real-time according
to the variation of sunlight intensity to realize the
maximum power point tracking (MPPT). Based on
the design philosophy that it is more ecient to
store water rather than electricity, there is no energy
storing device such as storage battery in the system.
To nd more information on how to use LORENTZ
Assistant for LORENTZ products, search for "LORENTZ
Assistant" in partnerNET.
For more information on LORENTZ Assistant, other
LORENTZ tools and support visit LORENTZ partnerNET
which contains a rich collection of helpful articles and
videos.
* Google Play and the Google Play logo are trademarks
of Google LLC.

Product Information 1312 Product Information
EN EN4.2 Technical Data of the PSk3 Controller
Table 2: Technical Data of the PSk3 Controller
Model
PSk3-7 PSk3-15
Input (DC)
Max. PV voltage 850 V
Voltage range 400 ... 850 V
Minimum MPPT voltage 575 V
Max. current 14 A 27 A
Max. ISC PV array 30 A 40 A
Max. inverter backfeed current into
array 0 A
Input (AC)
Rated voltage 380 ... 480 V +/- 10%
Frequency range 45 - 60 Hz
Max. current 17.5 A 30 A
Max. current (inrush) 42 A
Max. fuse ratings 20 A 35 A
Grid type TN / TT *
Output (AC)
Rated voltage 380 V
Voltage range 380 V / 400 V / 415 V / 440 V /
460 V / 480 V
Rated frequency 50 Hz
Frequency range 0 ... 60 Hz
Rated current 13 A 24.5 A
Rated output power 8.3 kVA 16 kVA
Min. rated power factor 0,85
Rated power of motor 5.5 kW 11 kW
General
Protection I
Ingress protection IP 66
Overvoltage category II (PV), III (AC)
Ambient temperature range -25 ...60°C*
Cooling concept forced cooling
Max. altitude rating 2000 m
Mechanic Dimensions (HxWxT) 428x280x180 mm
Weight 15 kg / 33.07 lbs
*Depending on the actual load situation, a power
derating may apply at ambient temperatures above
50°C. This allows the pumping system to continue
operation at reduced power instead of switching o
completely.
4.3 Technical requirements for the pumps
LORENTZ PSk3 submersible and PSk3 CS-F/CS-G
surface pumps can be used for drinking water
supply, livestock watering and irrigation applications
not containing solid or long bred particles larger
than sand grains, with a max. grain size of 2 mm. The
max. permitted sand content for submersible pumps
is 50 ppm, for surface pumps 20 ppm. A higher sand
content will reduce the pump life considerably due to
wear. The max. salt content is 300-500 ppm at max.
30 °C / 86 °F. Defects due to pumping other liquids
are not covered by the warranty. The maximum
uid temperature for PSk3 submersible pumps is
+30 °C (86 °F), for PSk3 CS-F surface pumps its +70
°C (158 °F) and for PSk3 CS-G surface pumps +90 °C
(194 °F).
PSk3 surface pumps should be sited in a well-
ventilated and frost-free position. The distance
between the pump unit and other objects should be
at least 150 mm / 6” to ensure proper air circulation.
If installed outside, the pump must be protected
*Can only be used with star/wye network. For further information please
get in touch with your LORENTZ distributor.
from rain and direct sunlight. This will increase the
durability of the pump. It should not be stored or
operated within 1 km / 0.6 miles of coastal regions or
in saline air (more than 2 μg/m³).
Additional information about pumps and motors can
be found in the LORENTZ COMPASS sizing software.

Product Information 1514 Product Information
EN EN
4.5 Storage of pump system components
Prolonged intermediate storage in an environment
of high humidity and uctuating temperatures must
be avoided. Moisture condensation may damage
metal parts. Non-compliance can void the warranty.
It is recommended to store the parts in a closed and
dry room. The pump system must not be stored or
operated where the average day humidity is above
80%. The motor, the pump end and controller can be
stored (not used) in the range of –20°C to +65°C (–4°F
to +149°F). The components should not be exposed
to direct sunlight.
for CS-G pumps
CS -G100 -22 /2
motor poles
rated ow (m³/h)
DN of inlet and outlet
single stage pump with
cast housing
centrifugal surface
4.6 Scope of delivery
Scope of delivery
#Item Quantity
1PSk3 controller 1 unit
2Sun Sensor module
1.5 Wp 1 unit
3Cable gland reducer 2 units
4Manual 1 unit
Check upon receipt that the packaging is undamaged
and complete. If any abnormity is found, contact
your supplier.
LORENTZ pumps are supplied from the factory in
proper packing in which they should remain until
they are to be installed at the site. Handle the pump
with care and avoid unnecessary impacts and
shocks.
4.4 Naming convention
A PSk3 pump system name consists of two
components. The rst component refers to the
pump systems controller while the second part
refers to the pump model. A detailed overview about
the pump model naming can be found below.
Pump model denition
for C-SJ8-44 to C-SJ75-4 submersible pumps
C-SJ 12 -9
number of impellers
rated ow (m³/h)
submersible
centrifugal
for C-SJ150-2-2 pumps
C-SJ 150 -2-2
number of small
impellers
number of impellers
rated ow (m³/h)
submersible
centrifugal
Pump model denition
for CS-F12 to CS-F20 surface pumps
CS -F12 -9
stages
rated ow (m³/h)
vertical multistage
pump
centrifugal surface
for CS-F32 to CS-F85 pumps
CS -F32 -60 -2
number of small
impellers
stages ×10
rated ow (m³/h)
vertical multistage
pump
centrifugal surface

Safety Instructions 1716 Safety Instructions
EN EN
5 Safety Instructions
Safe operation of this product depends on its
correct transportation, installation, operation and
maintenance. Failure to follow these instructions
can be dangerous to life or health and/or void the
warranty.
READ AND FOLLOW
ALL INSTRUCTIONS!
Explanation of warning symbols
l WARNING – Disregard can lead to
injury, death or damage the system
a CAUTION – Recommended to avoid
damage, premature ageing of the pump
or similar negative consequences.
O Refer to the operating instructions.
0 WARNING – risk of electric
shock, energy storage timed
discharge. Refer to time written
on symbol.
When installing and using this electrical equipment,
basic safety precautions should always be followed,
including the following:
l WARNING – To reduce the risk of
injury, do not permit children to use
this product unless they are closely
supervised at all times.
l WARNING – The appliance is not to
be used by persons (including children)
with reduced physical, sensory or mental
capabilities, or lack of experience and
knowledge, unless they are instructed
and closely supervised.
WARNING – To reduce the risk of
electric shock, replace damaged cords
immediately.
WARNING – It must be assured that
all grounding connections are properly
made and that the resistances meet local
codes or requirements.
The manual contains basic instructions which must
be observed during installation, operation and
maintenance. Before installation and start-up, the
manual should be carefully read by the person in
charge of the installation. The manual should also be
read by all other technical personnel/operators and
should be available at the installation site at all times.
Personnel qualications and training – All
personnel for the operation, maintenance,
inspection and installation must be fully qualied
to perform that type of job. Responsibility,
competence and the supervision of such
personnel must be strictly regulated by the
operator. Should the available personnel be
lacking the necessary qualication, they must be
trained and instructed accordingly. If necessary,
the operator may request the manufacturer/
supplier to provide such training. Furthermore,
the operator/user must make sure that the
personnel fully understand the contents of the
manual.
Dangers of ignoring the safety symbols –
Ignoring the safety directions and symbols
may pose a danger to humans as well as to
the environment and the equipment itself.
Non-observance may void the warranty. Non-
observance of safety directions and symbols
may for example entail the following: Failure of
important functions of the equipment/plant;
failure of prescribed methods for maintenance
and repair; danger to persons through electrical,
mechanical and chemical eects; danger to the
environment because of leakage of hazardous
material; danger of damage to equipment and
buildings.
Safety-oriented operation – The safety
directions contained in the manual, existing
national regulations for the prevention of
accidents as well as internal guidelines and safety-
regulations for the operator and user must be
observed at all times.
General safety directions for the operator
or user – If hot or cold equipment parts pose
a danger then they must be protected by the
operator/user against contact with people.
Protective covers for moving parts (e.g. couplings)
must not be removed when the equipment is
running. Leaks (e.g. at the shaft seal) of hazardous
pumping media (e.g. explosive, toxic, hot liquids)
must be disposed of in such a way that any danger
to personnel and the environment is removed.
All government and local regulations must be
observed at all times. Any danger to persons from
electrical energy must be eliminated by using
good installation practices and working to local
regulations (e.g. VDE in Germany).
Safety directions for maintenance, inspection
and assembly work – It is the user’s responsibility
to make sure that all maintenance, inspection
and assembly work is performed exclusively by
authorized and qualied experts suciently
informed through careful study of the operating
instructions. The accident prevention regulations
must be observed. All work on the equipment
must be done when it is not operational and
ideally electrically isolated. Ensure all power
sources and accessories (e.g. oat switch) are
disconnected when working on the system.
Follow all appropriate electrical codes. There
are no user-serviceable parts inside the motor
or the controller. The sequence for shutting the
equipment down is described in the manual
and must be strictly observed. Pumps or pump
units handling hazardous liquids must be
decontaminated. Immediately upon completion
of the work, all safety and protective equipment
must be restored and activated. Before restarting
the equipment, all points contained in chapter
"8.3.5 Initial Start-up" on page 69 must be
observed.

Pump System Sizing & Layout Diagrams 1918 Pump System Sizing & Layout Diagrams
EN EN6 Pump System Sizing & Layout
Diagrams
6.1 Pump System Sizing
To professionally size and install a water pumping
system, various variables need to be taken into
consideration depending on the pump type and
application:
Static head - Vertical height from the dynamic water
level to the highest point of water delivery.
Suction head (only applicable to non-submersible
pumps) - Vertical height from the water level to the
pump inlet where the water level is below the pump
inlet.
Pressure losses - Loss of water pressure due to
pipe length and friction caused by pipe material and
additional pipeline elements like elbows, valves.
For solar water pumping additionally local
irradiation levels are necessary to calculate the
available power during each day and the eect on
water output.
Unauthorized changes and manufacturing
of spare parts – Any conversion of or changes
to the equipment may only be undertaken after
consulting the manufacturer. Original spare parts
and accessories authorized by the manufacturer
guarantee operational safety. Using non-
authorized parts may void any liability on part of
the manufacturer. There are no user-serviceable
parts inside the motor or the controller.
Unauthorized operation – The operational safety
of the equipment delivered is only guaranteed
if the equipment is used in accordance with the
directions contained in this manual. Limits stated
in the data sheets may not be exceeded under any
circumstances.
RETAIN THESE
INSTRUCTIONS
FOR FUTURE USE!
To easily manage and consider the dierent
variables, LORENTZ strongly advises to size pump
systems with LORENTZ COMPASS, the solar pump
planning software.
COMPASS is the LORENTZ tool for designing,
planning and specifying solar pump systems. It is
available for download to all LORENTZ partners on
partnerNET.
COMPASS is a PC-based tool to simply specify solar
pumping systems in real time. It is based on NASA
weather data and uses precise algorithms for even
the most complex calculations.
By selecting the location from a list of more than
250,000 cities, entering the total dynamic head
(TDH) and the necessary amount of water per day
the software will automatically show suitable pump
systems and the necessary size of the PV generator.
Figure 1: COMPASS sizing
For more complex situations COMPASS oers
features from suction head calculation to pipe type
specic pressure loss calculation.
a NOTE – Always ensure the values
used for sizing with COMPASS match the
conditions on site. Incorrect parameters
can lead to a wrong sizing report.

Pump System Sizing & Layout Diagrams 2120 Pump System Sizing & Layout Diagrams
EN EN
PV Generator
SunSensor
module
PV Protect
PV Disconnect
PSk3
Controller
Float
switch
water meter
valve
ller
pressure sensor
surface pump
water detection sensor
strainer
gate valve
surge
protector grounding
rod
oat switch
liquid level
sensor
strainer
n o n - r e t u r n v a l v e
Surge
protector
6.3 System Layout: Surface Pumps
a CAUTION – This graphic is an example
pump system layout diagram and for
ease of understanding only. For system
installation and wiring read and follow
the detailed instructions given in this
manual.
Figure 3: Surface pump layout
6.2 System Layout: Submersible Pumps
a CAUTION – This graphic is an
example pump system layout diagram
and for ease of understanding only. For
system installation and wiring read and
the detailed instructions given in this
manual.
Figure 2: Submersible pump layout
PV Generator SunSensor
module
PSk3
Controller
remote switch
(oat switch)
pressure sensor
water meter
PV Disconnect
PV Protect
grounding rod
splicing kit
well probe
liquid level sensor
safety rope
submersible pump
ow sleeve

Pump System Sizing & Layout Diagrams 2322 Pump System Sizing & Layout Diagrams
EN EN6.4 Solar-diesel system sizing
considerations
The PSk3 is able to switch between solar and diesel
as well as blend both power sources, e.g. to obtain
a desired ow rate or pressure irrespective of
sunshine.
It can operate on diesel generators with a constant
power rating higher, equal or smaller than the power
rating of the pump motor.
The constant power rating of the diesel generator
should be selected considering the desired ow or
pressure.
LORENTZ SmartSolution supports the following
diesel generator specications:
 380/ 400/ 415/ 440/ 460 /480 V
 50/ 60 Hz
 Remote start function (if use of SmartStart is
desired)
Grid power SmartSolution
grid
connectionPSk3 controller

Controller Installation 2524 Pump System Sizing & Layout Diagrams
EN EN
7 Controller Installation
l WARNING – All electrical connections
must be performed by qualied experts
only.
WARNING – Do not dismantle the
controller while still connected to the
power supply! Before any installation,
maintenance or inspection activities wait
at least ve minutes after the power
supply has been disconnected from the
controller!
a CAUTION – To avoid multiple starts of
the pump in twilight conditions, the Sun
Sensor module must be connected and
congured for all PSk3 pump systems.
Operating without a Sun Sensor module
can lead to increased wear or damage to
the pump. Such damage is excluded from
the warranty.
CAUTION – Never let the pump run
dry. Dry running will damage the pump
and void the warranty. LORENTZ requires
a dry run protection for every pump
system.
7.1 Controller Elements
Power on/o switch – The power switch is used to
start or stop the system and as a reset switch. It
does not work as power disconnect switch.
Indicator Lights – The six LED lights on the
front indicate dierent operational situations.
For a detailed explanation refer to chapter "10
Operating the Pump" on page 87
7.2 Controller Placement
The PSk3 controller is rated for outdoor use with an
ingress protection rating of IP66. This means that
inside electronics are protected against dust and
strong water splashes when properly installed. Keep
the controller cover sealed all times as the inside
electronics are sensitive to water, moisture, dust or
animals.
Electronic devices are most reliable when they are
protected from heat. Mount the controller where
it is shaded from the midday sun. An ideal location
is in permanent shade. If no shade is available, cut
a piece of sheet metal and bolt it behind the top of
the controller. Bend it over the controller to provide
shade. Make sure that the fan of the PSk3 is not
covered and forced cooling it possible.
This is especially important in extremely hot
locations. Extreme heat may trigger a thermal
function in the controller causing it to reduce the
power consumption or turn it o.
Place the controller close to the pump to keep the
motor cable short.
If the installation is exposed to lightning, we
recommend using a surge protector and put it inside
the controller.
Generator SmartSolutionGenerator SmartSolution
GeneratorSmartStart
PSk3 Controller

Controller Installation 2726 Controller Installation
180 250
270
280
390
428
n6.5
10
Ø15.4
A
A ( 1 : 1 )
180 250
270
280
390
428
n6.5
10
Ø15.4
A
A ( 1 : 1 )
50mm/2”
300mm/12”
300mm/12” 300mm/12”
EN EN7.3 Mounting, Space and Ventilation
Requirements
The PSk3 controller must be mounted on a solid wall
or a rigid structure.
The installation plane must be concrete, metal, stone
or any other material with similar properties that
can absorb a tensile force of 200 N per screw after
the controller has been installed. The screw size
should be M5 or M6 and enable even fastening of
the controller. If the material does not allow proper
screw fastening, dowels can be used to support the
structure and enable it to absorb a tensile force of
200 N per screw. After installation no additional load
should be put on the controller, e.g. storing material
on top of the controller, which could increase the
load on the xation plane.
First, mark all drill holes. Refer to „Table 3: PSk3
controller dimensions for installation“ on page
26. Fit all screws, leave about 10 mm / 0.4” space
between the screw’s head and the wall. Hang the
controller on the wall. Finally, tighten all screws.
For grounding of the front cover the cover screws
must be tightened to a minimum torque of 2 Nm.
PSk3 controllers can be mounted side by side. Make
sure to keep the minimum spacing shown in „Figure
5: Minimum spacing for wall mounting“ on page
27.
Figure 5: Minimum spacing for wall mountingFigure 4: PSk3 controller dimensions for installation
Table 3: PSk3 controller dimensions for installation
Dimension in mm [in]
Weight in kg [lbs]W1 W2 W3 H1 H2 H3 D1
280 250 280 390 270 428 180 15
[11.02] [9.84] [11.02] [15.35] [10.63] [16.85] [7.09] [33.07]

Controller Installation 2928 Controller Installation
EN EN
7.4.1 Controller wiring for solar only
7.4.1.1 Terminal description
Open the housing by loosening the four screws
on the front cover. After removing the cover the
terminal can be accessed easily.
For “Solar-IN” and “Motor-OUT” open the clamp,
insert the wires and lock the clamps in place. Use
caution and keep hold of the clamp handles as the
terminals contain strong springs. Refer to „Figure 8:
Spring connector for "Solar-IN" and "Motor-OUT"“
on page 31. The length of wire stripping for these
terminals is 12-13 mm (0.5 in).
Figure 6: View of open PSk3 controller
For terminals 1 to 18 open the terminal by pushing
back the clamp handle with a screwdriver, insert
the wire, then release the handle to lock the wire in
place. Refer to "Figure 9: Spring connector for "Sensor
terminals 1-18 and fan terminal"" on page 31. The
length of wire stripping for these terminals is 5 - 6 mm
(0.2 in).
7.4 Wiring the controller
l WARNING – All electrical
connections must be performed by
qualied experts only! Unqualied
handling might lead to shock, burns, or
death.
WARNING – Beware of high voltage.
Never work on a system connected
to power or within two minutes after
disconnection to avoid electric shock
hazard.
0 WARNING – Do not
dismantle the controller while
still connected to the power
supply! Before any installation,
maintenance or inspection
activities wait at least ve
minutes after the power supply
has been disconnected from the
controller!
Before starting to work on the electrical system
make sure that all components are disconnected
from the power source. Do not work on any
components when power is connected or within
ve minutes after disconnection. The controller
needs time to discharge.
Switch the system on only when all work is
completed.
a CAUTION – The controller should
only be connected to power after
correct wiring or the controller might
get damaged.
a CAUTION – Do not install disconnect
switches in the power wires between the
motor and pump controller. Connecting
the motor wires to a switched-on
controller may cause irreparable
damage. Such damage is excluded from
the warranty.
CAUTION – Solar-direct systems only
– Do not connect any electrical load to
the PV generator other than the LORENTZ
pump controller. Connection of a battery
charger, active solar tracker controller,
electric fence charger, or other load
simultaneously with LORENTZ PSk3
systems may interfere with the controller
and prevent proper operation.
CAUTION – Measure the voltage
before connecting power to the
controller. Voltage (open circuit) must
not exceed the max. DC input.
a NOTE – PSk3 can be supplied by
solar and / or an AC source. This can
lead to an interaction of both sources,
especially if the system is not properly
installed. Special care must be taken
when installing the PSk3 controller in
hybrid conguration. Carefully read the
following chapters.
Placeholder for
optional board
Motor U V W
Motor ground
Sensor Terminals 1-18
Sensor Shield
Connector
Solar Input

Controller Installation 3130 Controller Installation
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
sensor terminals 255-40*
v60°/h30°
v60°/h30°
power terminals 2716-20*
1
1
2
2
3
3
4
4
5
5
6
6
A A
B B
C C
D D
sensor terminals 255-40*
v60°/h30°
v60°/h30°
power terminals 2716-20*
Well
probe
Remote
switch
Water
meter
Analog 1
4-20mA
Analog 2
4-20mA Relay Water sensor
Sun
Sensor
GND GND GND +24V +24V NC COM NO +24V GND + –
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
EN EN
Close
Open
Insert wire
use a at
screwdriver to
push back
Terminal description PSk3
Figure 8: Spring connector for "Solar-IN" and "Motor-
OUT"
Table 4: Clamping range of connectors
Insert wire
Open
Close
Terminal AWG size Metric size
Motor 16 - 6 AWG 1.5 - 16 mm2
PV 16 - 6 AWG 1.5 - 16 mm2
Sensor 28 - 12 AWG 0.08 - 2.5
mm2
Figure 9: Spring connector for "Sensor terminals 1-18
and fan terminal"
Figure 7: Sensor terminal wiring example
Well
probe
Remote
switch Water
meter
Analog
sensors
Out NC
Water sensor
Sun Sensor
Surge
Protector
Out NO

Controller Installation 3332 Controller Installation
EN EN
Relay
11 connect to NC Potential-free signal output to control
third party devices; must be congured
with LORENTZ Assistant; either NC or NO
operation can be used
Maximum switching capability remote
switch: 250 V AC / 30 V DC, 2 A
12 connect to COM
13 connect to NO
Water
detection
sensor
14 optional: connect positive (+) Connect water detection sensor for
surface pumps – for submersible pumps
a jumper wire is needed between 15+16.
If necessary, use 24 V DC supply from
terminal 14. The connected sensor must
not draw a higher current than 20 mA, if
the optional power terminal is used.
15 connect to Signal
16 connect to GND
SunSensor
module
17 connect positive (+) Connect the SunSensor to terminal 17+18
and observe polarity. The SunSensor is
included with the PSk3 controller and
needed to protect the pump.
18 connect negative (–)
AC In
L1 connect to L1 phase of the AC
grid
Power supply from an AC source, e.g. a
generator or a grid connection
L2 connect to L2 phase of the AC
grid
L3 connect to L3 phase of the AC
grid
PE connect to protective ground
wire (PE)
Solar IN
+connect positive wire of PV
generator Power supply from the PV generator
–connect negative wire of PV
generator
Motor OUT
Uconnect to phase 1 of motor
Observe correct rotational direction of
pump
Vconnect to phase 2 of motor
Wconnect to phase 3 of motor
PE connect to protective motor
ground wire (PE)
Figure 10: PSk3 sensor terminals
Table 5: Sensor terminal explanation
Socket Terminal Connection Function
Well probe
1 connect to NC Connect a well probe or oat switch
to terminal 1+2 to protect the pump
system from running dry. Every pump
system must be equipped with a dry run
protection. Connect a jumper between 1+2
if not used.
2 connect to GND
Remote
switch
3connect to NC Connect a tank switch, pressure switch
or any other suitable remote switch to
terminal 3+4.Connect a jumper between
3+4 if not used.
4connect to GND
Water meter
5connect to Signal Connect a device that provides a
potential-free impulse signal, e.g. a reed
contact. Water amount per impulse must
be congured with LORENTZ Assistant.
Allowed pulse rate ≤ 200 Hz.
6connect to GND
Analog input
1 (4-20mA)
7connect positive (+) 4 –20 mA signal sensor supply voltage
+24 V load impedance 100 Ω; observe
correct polarity
8connect negative (–)
Analog input
2 (4-20mA)
9connect positive (+) 4 –20 mA signal sensor supply voltage
+24 V load impedance 100 Ω; observe
correct polarity
10 connect negative (–)
COM = common; GND = ground; NC = normally closed; NO = normally open; PE = protective
earthing

Controller Installation 3534 Controller Installation
EN EN7.4.1. 3 PV Array Wiring
l WARNING – When the photovoltaic
array is exposed to light, it supplies a DC
voltage to the PSk3 Controller.
WARNING – Do not ground solar!
Grounding solar when also using AC
power supply destroys the controller!
Failure to do so will result in signicant
damage to the controller.
It is the installers' duty to correctly size and
install the solar array, which includes all required
components like solar generator, cables, fuses,
combiner, disconnection devices and surge
protectors. Installation shall be made depending on
local installation requirements and conditions.
Only IEC 61730 compliant solar modules shall be
used with a system voltage rating of at least 1000 V
DC.
The pump system must be equipped with a proper
sized DC disconnect switch for safe installation and
maintenance of the controller. The switch must
be installed between the solar generator and the
controller. It must meet the following requirements:
minimum 850V DC
continuous current rating according to maximum
current of pump controller or higher
capable of carrying and switching the max. short
circuit current of the solar array
the switch must be rated for DC current, NOT AC
A PV disconnect switch that matches all these
requirements can be purchased from LORENTZ.
a NOTE – The use of a properly sized
disconnect switch is an important
safety measure and mandatory for a
professional installation of a solar pump
system.
The diagram „Figure 12: Example conguration of
dierent components“ on page 37 provides an
example conguration. The exact requirements will
depend on the module conguration as dened in
COMPASS for the system being installed.
Electrical conduit
Electrical conduit is recommended. We recommend
the use of an electrical conduit (pipe) to protect
outdoor wiring from the weather, from human
activities and from damage caused by animals. If
you do not use a conduit, use a strong, high-quality
outdoor cable. Where cables enter the junction box,
install sealed strain relief cable glands.
7.4.1.4 Motor Wiring
7.4.1.4.1. Connecting the motor cable
The surface pump motor has a wiring box that
contains the connection terminals for the three
motor phases.
The pump motor provides bolt terminals to connect
the motor cable. For a professional and reliable
connection it is required to use cable lugs for
connecting the motor cable to the bolt terminals.
The motor phases are labeled with "U", "V", "W".
7.4.1. 2 Cable entries
There are cable glands of dierent diameters in the
bottom of the controller.
Power cables and accessories which use the cable
glands must be tightened properly in the glands for
strain relief and sealing.
If a power cable cannot be tightened because its
diameter is too small for the cable gland, a suitable
cable gland reducer has to be used to t the hole
of the cable gland to the cable diameter. Two sizes
of cable gland reducers are included with the PSk3
controller.
Figure 11: PSk3 controller front view
Sensor cable
glands
Outside grounding
bolt
Motor Out cable gland
On / o switch
AC input cable gland
Solar input cable
gland

Controller Installation 3736 Controller Installation
1
6
4 9
2 7
3 8
5 10
EN ENFigure 12: Example conguration of dierent components
*It is the installer's duty to safely install the solar array according to local standards.
a CAUTION – The wiring order will have
impact on the motor rotation direction.
The correct rotation direction is marked
with an arrow sticker on the pump and
motor.
CAUTION – Observe the rotation
direction of the pump when the system
installation is nished and the pump was
been successfully primed with water.
In case the rotation direction is incorrect exchange
any two of the three motor phases to reverse the
rotation direction.
7.4.1.4.2. Resistance measurement
We recommend checking the winding and insulation
resist ance before connecting the pump to the
controller. For a surface pump these measurements
should be done BEFORE taking the pump into
operation.
l WARNING – Before starting any work
on the pump system, make sure that
the electricity supply has been switched
o and that it cannot be accidentally
switched on!
To measure the winding and insulation resistance
disconnect all motor leads from the controller. A
good quality multimeter is necessary to measure the
phase-to-phase resistance with an accuracy to the
rst decimal place. (“0.1 Ohms”). It is also advisable
to consider the resistance of the multimeter leads
when measuring very low values:
Hold the tips of the multimeter together and note
the value.
a NOTE – Always subtract this
value from your motor resistance
measurements!
Winding resistance
(1) Set the multimeter to “resistance measurement”
and select the lowest measuring range.
(2) All PSk3 motors are 3-phase motors. Measure
the resistance of phase-to-phase: 1-2, 2-3, 3-1.
Make sure there is good contact between the
probes and the cable.
(3) The deviation between the phases should be
within 10 %. If the deviation is too high, the
reason is likely a damaged submersible cable or
a faulty cable splice.
(4) The absolute value is made up of the resistance
of the motor winding and the submersible
cable. The resistance of the submersible cable
depends on its length and size. For copper cable
the values of the table "Table 6: Motor cable
resistance" on page 38 and "Table 7: Winding
resistances for surface pump motors" on page
39 can be used as a rough approximation.
PV Strings*
PV Disconnect 1000-40-5
PV Combiner 1000-125-4
PV Protect 1000-125
PSk3 Controller

Controller Installation 3938 Controller Installation
EN EN
Surface pump CS-F motors PSk3 system Phase-to-phase resistance
[Ω]
AC DRIVE CS-F 5.5 kW PSk3-7 1.4
AC DRIVE CS-F 7.5 kW PSk3-15 1.4
AC DRIVE CS-F 11 kW PSk3-15 0.8
Surface Pump CS-G Motors PSk3 system Phase-to-phase resistance
[Ω]
AC DRIVE CS-G 5.5 kW PSk3-7 1.7
AC DRIVE CS-G 7.5 kW PSk3-9 1.3
AC DRIVE CS-G 11 kW PSk3-15 0.8
AC DRIVE CS-G 11 kW/4p PSk3-15 0.8
Calculation of expected phase-to-phase
resistance:
= 1.4 Ω + 2 × 150 m × 0.25 Ω / 100 m
= 1.4 Ω + 2 × 0.375 Ω
= 1.4 Ω + 0.75 Ω
= 2.15 Ω
= ~ 2.2 Ω
Cable Resistance
[Ω / 100 m]
2.5 mm2 / AWG 13 0.82
4 mm2 / AWG 11 0.40
6 mm2 / AWG 9 0.25
10 mm2 / AWG 7 0.17
16 mm2 / AWG 5 0.10
Example:
 Motor:
AC DRIVE CS-F 7.5 kW  1.4 Ω
 Motor cable:
150 m and 6 mm2 0.25 Ω / 100 m
The real measured values can be dierent,
depending on the measurement equipment
and materials that are used. This is just an
approximation.
Insulation resistance
Use a megohmmeter at 500 –1,000 V.
Measure each phase to ground. Connect one test
prod to the phase, hold the other test prod to the
pipe work, or if plastic pipes are used to the ground
wire.
If the insulation resistance is below 0.5 MΩ, the
motor cable must be checked for damage.
Wire sizes
For motor cables, the minimum wire size depends on
the system size and sizing. Compare your wire sizes
to the LORENTZ COMPASS sizing reports. Cables
should be shielded to meet EMC requirement.
For outdoor use, cables meeting the requirements of
IEC 60245-66 are recommended. For indoor use, the
recommended cable type is dened in IEC 60245-
57. The installer must always consider the local
situation, codes of practice and regulations and use
a cable that meets these requirements.
Table 6: Motor cable resistance Table 7: Winding resistances for surface pump
motors