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9 Controller Installation
9 1 General
The pump system must be equipped with a proper sized DC
disconnect switch. The switch must be installed between
the solar generator and controller. It must meet the follow-
ing requirements:
ƒ minimum 850 V DC
ƒ continuous current rating according to maximum
current of pump controller or higher
ƒ the switch must be rated for DC current, NOT AC
A PV disconnect switch, matching all requirements above,
can be purchased from LORENTZ.
NOTE – The use of a properly sized
disconnect switch is an important
safety measure and obligatory for a
professional installation of a solar
pump system
Figure 2: Controller dimensions for installation
W1
Table 4: Controller dimensions for installation
Model
W1
W2
all
320
290
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.
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
chewing 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.
WARNING – Do not dismantle the
controller while still connected to the
power supply! Before any installation,
maintenance or inspection activities
wait at least FIVE MINUTES after the
power supply has been disconnected
from the controller!
Treat the controller as industrial waste when processing the
discarded controller. It is possible that some components
could produce toxic and harmful gas.
D2
D1
Dimension [mm]
H1
H2
H3
500
450
425
W2
d
d
Weight
[kg]
D1
D2
17
220
250
9
9 2 Controller Placement
The controller must be protected from water, moisture
and animals. Place the controller in a dry and sufficiently
ventilated environment.
Place the controller close to the solar array, not the pump.
This will reduce the risk of lightning damage. Explanation:
The controller's input circuitry is more sensitive to surges
than its output. It is safest to minimize the length of the
input wiring.
Electronic devices are most reliable when they are pro-
tected from heat. Mount the controller where it is shaded
from the midday sun. An ideal location is directly under the
solar array, on the North side of the mounting structure. 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. This is especially important in extremely
hot locations. Extreme heat may trigger a thermal function
in the controller causing it to reduce the power consump-
tion or turn it off.
Sun. Water.
Life.
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