Lorentz PV Combiner 1000-125-4 Specification sheet

The Solar Water Pumping Company
PV Combiner 1000-125-4
Connection Box for parallel wiring
Manual for Installation and Operation
Photo may dier from actual product
EN

Siebenstuecken 24, 24558 Henstedt-Ulzburg
Germany, Tel. [phone], Fax -708
BERNT LORENTZ GmbH
55 x 25 mm
2 Introduction 3
EN
2 Content Introduction 3
EN
1 Introduction
Thank you for purchasing a LORENTZ product.
Before you begin - Check the product label to verify
that this is the item that you ordered. Also check
the product specications to be sure the product is
appropriate for your application.
Read the manuals of pump end, controller and other
components used in your system.
2 Storage and Handling
This LORENTZ product is supplied from the
factory in proper packing in which it should
remain until it is to be installed.
Handle the product with care and avoid
unnecessary impacts and shocks.
Prolonged intermediate storage in an
environment of high humidity and uctuating
temperatures must be avoided. Moisture
condensation may damage metal parts.
Non-compliance will void any warranty. It is
recommended storing the parts in a closed and
dry room.
The product can be stored in the range of –30 °C
to 50 °C (-22 °F to 120 °F). The product should not
be exposed to direct sunlight.
3 Ambient Conditions
The permitted ambient temperatures for use are:
-30°C to 50˚C (-22 °F to 120 °F).
Humidity and air salinity:
The product must not be operated where day
average humidity is above 80% or in saline air with
more than 2μg/m³.
4 Declaration of Conformity
We, BERNT LORENTZ GMBH, declare under our sole
responsibility that the product:
PV Combiner 1000-125-4
to which the declaration relates, is in conformity with
the Council Directives on the approximation of the
laws of the EC Member States relating to:
Machinery Directive (2006/42/EC)
References of harmonized standards and/or other
technical specications applied:
 EN 60204-1:2006+A1:2009
Bernt Lorentz, CEO
Person authorized to compile the technical le
and empowered to sign the EC/EU declaration of
conformity.
Henstedt-Ulzburg, Germany, 1st March 2021.
STANDARDS
Meets the requirements for CE
Table of Content
1 Introduction .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .3
2 Storage and Handling .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .3
3 Ambient Conditions.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .3
4 Declaration of Conformity .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 3
5 Safety Instructions .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .4
6 Scope of delivery .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .5
7 Product Description.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .6
7.1 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
7.2 Further related LORENTZ products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
7.2.1 PV Disconnect 1000-50-5 (Item No. 19-001965) 7
7.2.2 PV Combiner 1000-15-3-F (Item No. 19-001940) and PV Combiner 1000-15-6-F (Item No. 19-001945) 7
7.2. 3 PV Protect 1000-125 (Item no.: 19-001970) 8
8 PV Wiring diagram for PSk Pump Systems . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .9
9 Installation.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 11
9.1 Mounting & Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9.2.1 General 12
9.2.2 Connecting the DC Input Cables 12
9.2.3 Wiring Connection 13
10 Troubleshooting. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 14

4 Safety Instructions Scope of delivery 5
EN EN
General safety directions for the operator/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 energized parts (e.g. terminal clamps) must
not be removed when the equipment is running.
All government and local regulations must be
observed at all times. Any danger to persons
from electrical energy must be excluded by using
good installation practices and working to local
regulations. (For example 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 perusal of the Operating
Instructions. The accident prevention regulations
must be observed. All work on the equipment
should be done when it is not operational and
ideally electrically isolated. Immediately upon
completion of the work, all safety and protective
equipment must be restored and activated.
Unauthorized changes and manufacturing
of spare parts – Any conversion or changes of
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 the part
of the manufacturer.
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.
Cited standards and other documentations –
DIN 4844 Part 1 Safety marking; Safety symbols
W 8, Supplement 13; DIN 4844 Part 1 Safety
marking; Safety symbols W 9, Supplement 14.
RETAIN THESE INSTRUCTIONS
FOR FUTURE USE!
6 Scope of delivery
Scope of delivery of the PV Combiner 1000-125-4:
Table 1: List of delivery:
Item Description Quantity
1PV Combiner 1000-125-4 1 unit
2Manual 1 unit
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 and/or void the warranty.
READ AND
FOLLOW ALL
INSTRUCTIONS!
Explanation of Warning Symbols
l WARNING – Disregard might lead to
injury or damage to the installation.
a CAUTION – Recommended to avoid
dysfunction or premature ageing of the
equipment etc.
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.
l WARNING – To reduce the risk of
electric shock, replace damaged cords
and cabling immediately.
l 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. The manual should be
carefully read before installation and start-up
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cation 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 user.
Should the available personnel be lacking the
necessary qualication, they must be trained and
instructed accordingly. If necessary, the operator
may require 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 any warranties. 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; endangerment of 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.

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6 Product Description Product Description 7
EN EN
7 Product Description
The LORENTZ PV Combiner 1000-125-4 is a PV
connection box to be used with our PSk pump
systems. The product is able to combine up to four
(4) DC inputs in parallel coming from multiple “PV
Disconnect 1000-50-5” and connect them to the
pump controller.
This is done by using the screw terminal clamps
located inside the box.
These terminal clamps are easily accessible by
unscrewing the lid.
The wiring instructions of the PV Combiner
1000-125-4 can be found in section "9.2.3 Wiring
Connection", see Figure 12 on page 13.
l WARNING – Never use this product
without a PV Disconnect. The use of a
properly sized DC disconnect switch is an
important safety measure and obligatory
for a professional installation of a solar
pumping system.
7.1 Technical Data
Parallel wiring for 4 DC Inputs
Enclosure class IP 68
Table 2: Technical data of LORENTZ PV Combiner
1000-125-4:
Technical Data PV Combiner
1000-125-4
Max. voltage 1000 V DC
Max. current per
string 125 A
Max. total current 125 A
Max. no. of strings 4
Input cable size 10 - 35 mm²
[AWG 8 - 2]
Output cable size 10 - 35 mm²
[AWG 8 - 2]
7.2 Further related LORENTZ products
Some large installations may require additional
accessories to connect the PV wiring of the system
in a proper way; in the section "8 PV Wiring diagram
for PSk Pump Systems" on page 9; you will nd a
graphical explanation of two scenarios where these
accessories are included. Below is a brief description
of these, please consider them depending on the
system to be installed.
7.2.1 PV Disconnect 1000-50-5 (Item No. 19-001965)
The LORENTZ PV Disconnect 1000-50-5 is a PV
connection box with an integrated disconnect switch
designed to be used with our PSk pump systems.
For more information, please refer to the manual of
the PV Disconnect 1000-50-5.
The product can combine up to ve (5) x PV module
strings in parallel and connect them through
the enclosed DC disconnect switch to the pump
controller.
For more details of the installation using the PV
Combiner 1000-125-4 please see Figure 5 on page
9 and Figure 6 on page 10.
Figure 1: Wiring terminals of the PV Disconnect
1000-50-5:
7.2.2 PV Combiner 1000-15-3-F (Item No. 19-001940)
and PV Combiner 1000-15-6-F (Item No. 19-001945)
The LORENTZ PV Combiner 1000-15-3-F and 1000-
15-6-F are PV connection boxes with fuses to be
used optionally with our PS2 and PSk pump systems
to protect the system against short-circuits in the PV
eld. The product can combine up to three (1000-15-
3-F) or six (1000-15-6-F) DC inputs in parallel coming
from solar arrays.
For more information, please refer to the manual of
the PV Combiner 1000-15-3/6-F.
For optimal protection of the PS2/PSk controller, it is
advisable to protect the strings with fuses to prevent
a short circuit coming from PV array.
In this case, the PV Combiner 1000-15-3-F or
PV Combiner 1000-15-6-F must be used so that
the PV Disconnect switch can operate within its
specications.
For more details of the installation using the PV
Combiner 1000-125-4 please see Figure 6 on page
10.

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8 Product Description PV Wiring diagram for PSk Pump Systems 9
EN EN
Figure 2: Wiring terminals of the PV Combiner 1000-
15-3-F:
Figure 3: Wiring terminals of the PV Combiner 1000-
15-6-F:
7.2. 3 PV Protect 1000-125 (Item no.: 19-001970)
The PV Protect 1000-125 will provide an enhanced
level of protection from electrical surges (for
example indirect lightning strikes). This accesory
is installed on the DC input line close to the pump
controller.
For more information, please refer to the manual of
the PV Protect 1000 -125.
For eective operation it requires a reliable ground
connection.
For more details of the installation using the PV
Combiner 1000-125-4 please see Figure 5 on page
9 and Figure 6 on page 10.
Figure 4: Wiring terminals of the PV Protect 1000-
125:
8 PV Wiring diagram for PSk Pump Systems
Figure 5: Example of PV wiring diagram for the PV Combiner 1000-125-4 using a PV Disconnect 1000-50-5
and a PV Protect 1000-125 .
"Installation where Fuses are not required"
PV Strings
PV Disconnect 1000-50-5
PV Combiner 1000-125-4
PV Protect 1000-125
PSk Controller

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3
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215
187
307
140
215
187
307
140
10 PV Wiring diagram for PSk Pump Systems Installation 11
EN EN
Figure 6: Example of PV wiring diagram for the PV Combiner 1000-125-4 using two PV Combiner 1000-15-6-F,
two PV Disconnect 1000-50-5 and a PV Protect 1000-125:
"Installation where Fuses are required"
PV Strings
PV Combiner 1000-15-6-F
PV Protect 1000-125
PSk Controller
PV Combiner 1000-125-4
*Note: In this example, two PV Disconnect 1000-50-5 are required due to the fact that the maximum rated current of the
disconnect switch is exceeded by the total short-circuit current (Isc) of the PV generator."
9 Installation
9.1 Mounting & Dimensions
l WARNING – All electrical connections
should be performed by qualied experts
only!
The PV Combiner 1000-125-4 must be mounted
vertically to a wall or a pole using appropriate xings.
Table 3: Mounting hole distances (Width x Height,
Hole Diameter):
Product Dimension
PV Combiner 1000-125-4 270 x 150, Ø6 mm
[10.6 x 5.9, Ø0.236 in]
For optimal protection against water ingress the
cable glands must point downwards and must be
tightened properly.
a CAUTION – Make sure the housing is
not distorted after mounting; otherwise
the lid may not close properly. Mount it to
an even surface / xed on a at vertical
surface.
Figure 7: PV Combiner 1000-125-4 (Front view):
Figure 8: PV Combiner 1000-125-4 (Bottom view):
Cable glands output
(2x PG16)
Cable
glands input (8 x
PG16)

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12 Installation Installation 13
EN EN
9.2 Wiring
9.2.1 General
Before starting to work on the electrical system
make sure that all components are disconnected
from the power source. Make sure each PV module
string is disconnected at some point so that no
voltage is present during wiring of the system. Only
reconnect the PV strings and switch on the system
when all work is nished.
a CAUTION – Loose connections are the
most common cause of system failures.
Pull each wire connection SLIGHTLY to
conrm that it is tightened securely.
Make sure that the cable glands are tightened and
that the cables t the clamping range of the cable
gland to ensure a proper seal.
Note: The PV Combiner 1000-125-4 is shipped
with a plastic bag containing smaller rubber
inserts for the cable glands to t cables with small
diameter.
Figure 9: Rubber inserts for small diameter cables:
Solar-direct systems use a variety of array
congurations. PV Modules can be connected in
series and also in parallel.
Refer to the System Wiring Diagram which
is provided by COMPASS and to the module
manufacturer’s instructions. Make good connections
that will last for many years. Most system failures are
caused by loose, corroded or shorted connections.
l WARNING – SOLAR-DIRECT systems
only - do not connect any electrical load
to the solar array if it is not part of the
LORENTZ Pump system. Connection of
a battery charger, active solar tracker
controller, electric fence charger, or other
load simultaneously with LORENTZ pump
systems may lead to improper operation.
9.2.2 Connecting the DC Input Cables
To access the clamping terminals, open the lid of the
housing and unscrew the touch protection (4x plastic
screws, PH3):
Figure 10: Screw locations for the lid (4pcs):
Use only the cable entries provided to bring the DC
inputs into the housing. Remove the plastic sealing
cap of the cable gland in advance. The cable conduits
must be tightened properly to provide an eective
seal.
Figure 11: Left (green): Correctly tightened / Right
(Red): Not tightened:
9.2.3 Wiring Connection
DC Input Cables (coming from PV Disconnect
1000-50-5):
Connect the DC Input cables with positive pole
"Red" to the left terminals labeled with “(+) In” and
all cables with negative pole "Black" to the right
terminals labeled with “(-) In ”. See Figure 12.
DC Output Cables (going to PV Protect or
Controller depending on the installation):
Connect the two cables leaving the box in the output
of the PV Combiner labeled with “Red (+) Out" and
"Black (-) Out” and connect them to the PV Protect
or Controller depending on the installation. For
more details regarding the connections to the inputs
of these devices, please refer to the respective
manuals.
Figure 12: Wiring terminals of the PV Combiner
1000-125-4:

14 Troubleshooting
EN
About LORENTZ
LORENTZ is the global market leader
in solar powered water pumping
solutions. Founded in Germany
during 1993 LORENTZ has pioneered,
innovated and excelled in the
engineering and manufacturing
of solar powered water pumping.
Today LORENTZ is active in over 130
countries through a dedicated network
of professional partners. LORENTZ
technology uses the power of the
sun to pump water, sustaining and
enhancing the life of millions of people,
their livestock and crops.
Simply – Sun. Water. Life.

LORENTZ India
Pvt. Ltd.
Netaji Subhash
Place
Pitampura110034
New Delhi
I n d i a
LORENTZ China
No 34 Jiuan Road
Doudian Town
F a n g s h a n D i s t r i c t
102433 Beijing
China
LORENTZ US Corp
710 S HWY 84
Slaton, TX 79364
USA
LORENTZ Germany
Siebenstücken 24
24558 Henstedt-
Ulzburg
Germany
www.lorentz.de
v230320
l WARNING – Make sure that all
terminal connections are conducted
properly to avoid damage and abnormal
operation. All terminal clamps must be
checked after installation!
l WARNING – Make sure that all PV
strings are connected with the correct
polarity or the PV Modules will get
damaged immediately.
l WARNING – Before connecting the
PV Modules to each other make sure that
the installation is complete.
10 Troubleshooting
Please read this section before calling for help.
If you call for help, please refer to the model and
serial numbers. The serial number can be found on
a small label with a barcode on the inner side of the
lid.
If the pump does not run
Most problems are caused by wrong connections
(in a new installation) or failed connections. Failed
connections are normally a result of a terminal /
clamp not being tightened properly or a wire slipping
out of a terminal.
Please check if:
 The screws of all terminal clamps are tight.
 The polarity of all connected PV strings is the
same and correct.
 Wire stripping is suitable for the terminals, no
clamped cable isolation.
 General condition of wires or signs of damage.
 The cables are corroded.
 There are short circuits in the system.
Inspect all wires and connections
Look carefully for incorrect or damaged wiring.
(especially in a new installation).