Electrical Installation; 4.1 Controller, Junction Box And Conduit; Figure 2: Transportation Protection Caps And Boots - Lorentz PS200 Installation Operation & Maintenance

4

Electrical Installation

4.1 Controller, Junction Box and Conduit

Protection caps and boots Before installation, remove
all protection caps from the junction box and replace them
with code-compliant conduit fittings. Likewise, remove the
protection boot from the bottom of submersible motors.
Location Place the controller close to the solar array, not
the pump. This will reduce the risk of lightning damage. The
controller's input circuitry is more sensitive to surges than
its output. It is safest to minimize the length of the input
wiring.
Protection from solar heat Electronic devices are
most reliable when they are protected from heat. Mount
the controller in the shade of the mid-day sun. An ideal
location is directly under the solar array, on the north side
of the mounting pole. If shade is not available, cut a piece
of sheet metal and bolt it behind the top of the control-
ler. Bend it over the controller to provide shade. This is
especially important in extremely hot locations. Extreme
heat may trigger a thermal switch in the controller and
cause it to turn off.
Location of controller Mount the controller vertically
to keep out rainwater. It is preferable to mount it ON THE
NORTH SIDE of a pole or other structure, to help reduce
solar heating. This may also allow easiest access without
hitting your head on the lower (South) edge of the array.
Junction box (optional) A pre-wired junction box is
available for your system. The junction box terminals will
handle pump wires as large as AWG #6 (13 mm
wires cannot be accommodated easily in the box, you can
Figure 2: Transportation protection caps and boots
page 8 | v100820
join them to smaller wires in the junction box. AWG #12
(4 mm 2 ) or larger is acceptable for this very short length. Do
NOT remove terminal screws. If the key to the junction box
gets lost, it can be opened with a screwdriver.
Mounting the controller and junction box to a pole
The controller can be mounted onto the solar array support
pole using materials available from your local electric
supply store. The best mounting hardware is "slotted strut"
(Unistrut or equivalent) with matching conduit clamps
®
to fit around the mounting pole. This makes a very strong
assembly that is easy to adjust. In North America, these
materials are commonly available from electric suppliers.
Electrical conduit is recommended We urge you to
use electrical conduit (pipe) to protect outdoor wiring from
the weather, from human activities, and from chewing
animals. If you do not use conduit, use strong, high-quality
outdoor cable. Where cables enter the junction box, install
sealed strain-relief cable clamps.
Keep the controller and junction box sealed Unused
holes must be sealed to keep out animals, insects, water
and dirt. Each hole is supplied with a rubber plug that can
be kept in place for this purpose.
Battery system Batteries must be in a cool location for
best longevity, and in a protective enclosure for cleanliness
and safety. Place the controller near the batteries but NOT
in the same enclosure. They must be safely isolated from
). If large the battery terminals and from corrosive gasses.
2
rubber caps
Errors excepted and possible alterations without prior notice.
WARNING To be installed, connected
and serviced by qualified personnel
only. Ensure all power sources are
disconnected when making connec-
tions to the controller. Follow all
appropriate electrical codes. There
are no user serviceable parts inside
the motor or the controller.
CAUTION Loose connections are
the most common cause of system
failures. Pull on each connection to
confirm that it is secure.
WARNING The black rubber caps on
the Controller cover are only
transportation covers and must be
replaced buy code compliant conduit
fittings.
WARNING Submersible motors are
delivered with a rubber boot on the
bottom oft he motor. This is only a
transportation measure and must be
taken off before installation.
rubber boot
Manual | LORENTZ PS Pump Systems