Lorentz PS200 Installation Operation & Maintenance page 5

Specific Warnings for Installation of PS Pumps
Open circuit (no-load) voltage above 100 V

for PS200 controllers, above 150 V for PS600
controllers and above 200 V for PS1200 and
PS1800 controllers will destroy the controller.
This may occur if the solar array is wired incor-
rectly. See Solar Array Wiring, Section 4.3
Do not attempt to run the motor without

controller.
 Do not attempt to use the controller for any
purpose other than LORENTZ PS pump systems.
To be installed, connected and serviced by

qualified personnel only. Ensure all power
sources are disconnected when working on the
system. Follow all appropriate electrical codes.
There are no user-serviceable parts inside the
motor or the controller.
Solar pumps run at low flow rates, and have

closer tolerances than conventional pumps. Ex-
treme sand or silt concentration (greater than
2 % by volume) may cause the pump to stop,
or the pipe to fill with sand. Do not use the
pumps to clean out a dirty well. See Section
5.7 for advice about dirty water.
Helical rotor pumps are sensitive to heat. Pro-

tect the pump from sunshine or other source
of heat, or it may lock temporarily. If the water
source is warmer than 22 °C (72 °F), be it only
temporarily, a special model may be required.
See Section 5.5
Undersized wire will cause failure to start. See

Section 4.7
 Install proper system grounding for safety and
lightning protection. See Section 4.2
Do not touch the controller input or pump

wires together to test for a spark.
Do not run the pump dry. Exception: to test

direction of rotation, for maximum 15 seconds.
See Section 4.8
Manual | LORENTZ PS Pump Systems
Test the direction of motor rotation before

installing the pump (counterclockwise looking
down). If direction is reversed, exchange the
connection of any two of the three power
wires to the pump. See Section 5.8
When pump is stopped by a shadow or by

action of float switch, it will restart after a 120
seconds.
 The low water probe must be submersed, or
the pump will stop for 20 minutes. If the probe
is not to be used, connect the probe terminals
in the junction box. (See section 4.5 and 4.9)
Helical rotor models (without a "C" in the

model number) are not self-draining. If drain-
age is required for freeze-protection, install
a weep hole or draining device below freeze
level. See Section 12.6
 Do not remove the check valve in attempt to
make it self-drain.
Pumps should not be stored in water for a

period longer then three month. Too long stor-
age time might seize the pump up. Pumps will
not be damaged, but might have to be pulled
to free them again. Therefore it is strongly
advised that every two to three months the
pumps should run for a few minutes.
Errors excepted and possible alterations without prior notice. v100820 | page 5