v140822
Sun. Water.
Life.
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.
9
3 7 Recommended Wire Sizes
Model
Controller to module
(P, N)
Earth wire
(PE)
Controller to motor
(U, V, W)
Controller to water
level sensor (S)
[mm
2
]
[mm
2
]
[mm
2
]
[mm
2
]
PS9k
4
2
4 for max. 130 m
1.00–1.50
PS15k
4
2
4 for max. 90 m or AWG #10 for
max. 400 ft
1.00–1.50
6 for max. 140 m
PS21k
4
3.5
4 for max. 60 m or AWG #10 for
max. 280 ft
1.00–1.50
6 for max. 90 m
PROMPT: Ambient temperature for the wire sizes as
recommended above is ≤50°C
PROMPT: High-power wall-mounting machine
model uses multi-channel DC input Wire size for
DC of each channel must be selected and used as
recommended in the table above
3 8 Connecting the Well Probe
The well probe contains a mechanical float with a magnet
inside. When the probe is submerged, the float rises, and
the magnet actuates a switch. The switch closes (makes
contact) to indicate the presence of water. If the water level
drops below the probe, the float drops, and the switch
opens (breaks contact): The controller will stop the pump.
When the water level recovers and switch closes again, the
controller will delay the restart for 10 minutes. This gives
time for the water level to recover. To force a quick restart,
turn the controller off, then on again. The switch is sealed,
so the contacts never touch the water.
Fixation: The probe is packed with two cable ties. For a
pump that is to be installed in a vertical position, clamp
it to the pipe just above the pump outlet, as shown in
the photo. Splice the two probe wires using the splice kit
components that are packed with the probe. The assembly
procedure is the same as the main pump splice.
Potential problems with the low-water probe in
surface water
: The probe has a moving float. It is highly
resistant to deposits and debris. However, it may stick
under some extreme conditions, especially from algae or
water creatures (snails, etc.) that may be present in surface
water.
Possible solutions are:
•
Hang the probe independently of the pump and pipe
(clamped to a weight, but not to the drop pipe). This
way, it can be pulled up for inspection or cleaning
without the need to pull up the pump. (This may not
be feasible if the well casing is smaller than 6 in)
•
Pull the probe out periodically (with the pump, if nec-
essary) for testing and inspection. The pump should
stop at the moment the probe leaves the water.
•
Wrap the probe in a protective screen (fibreglass
window screen, for example). Substitute a different
type of float switch. You can use any switch that
makes contact on rise (normally open).
WARNING – Always connect all DC
input sockets of the controller to
balance the load on the plugs! If
necessary use a combiner box to
distribute the power Otherwise the
controller will get damaged
WARNING: Running completely dry will
damage the pump and void the
warranty The purpose of the probe
system is to sense the loss of water
and turn the pump off before it can run dry
CAUTION: The low-water probe must
be positioned vertically, within 10° If
the pump is NOT to be installed
vertically, find an alternative way to
mount or suspend the probe, so that it is higher
than the pump, and in a vertical position
Figure 4: Well probe