Pump Accessories Installation 7978 Pump Accessories Installation
(a) PSk3 CS-F
(b) PSk3 CS-F1 to F20
(c) PSk3 CS-G
EN EN
sealed cable
clamp
position pump
o
pumping
range
position pump
on
cable
weight
9.7 Float Switch (Full Tank Shut-o)
We recommend the use of a oat switch or other
means to prevent overow of your tank. This will
stop the pump when the tank is full, then reset
when the level drops. This conserves ground water,
prevents overow, and eliminates unnecessary
pump wear. PSk3 controllers allow the use of a small
signal cable to a remote oat switch, even if the tank
is a long distance away.
Float switch requirements:
We recommend installing a surge protector to avoid
possible surges (e.g. from lightning) from the oat
switch cable into the controller.
(1) A switch must be used, not wet electrodes.
(2) The preferred system requires a oat switch to
OPEN contact on rise to turn the pump OFF. This
is called “normally closed” (N.C.).
Figure 50: Float switch
Float switch cable requirements:
(1) Two wires are needed.
(2) Minimum wire size 1 mm² / AWG 18. This is good
for a distance as far as 600 m / 2,000 ft.
(3) The cable must be suitable for its environment.
(4) If it must run a long distance, use twisted-pair
shielded cable to reduce the chance of damage
from lightning-induced surge.
Grounding shielded oat switch cable – If you use
shielded cable, connect the shield to ground at the
controller only. Do not ground the shield at the oat
switch. This will reduce surges induced by nearby
lightning.
Operation of the oat switch system – When
the water level is high, the oat switch will stop the
pump. The TANK-FULL indicator on the controller will
light up. When the water level drops, the oat switch
will signal this to the controller. The indicator light
will turn o, and the pump will restart if sucient
power is available.
Figure 51: Float switch scheme
For more information about the pressure sensor
range (LPS) please refer to the COMPASS datasheet.
Ensure that the pressure sensor is suitable for
your application regarding pressure range and
temperature resistance.
LORENTZ PSk3 CS-F pump ends allow the
installation of the pressure sensor at the pump
housing. This is a simple alternative compared to the
conventional pipeline installation.
For the pump types LORENTZ PSk3 CS-F1 to
CS-F20 it is necessary to remove the vent plug
to install the pressure sensor. Therefore install
the pressure sensor after the pump is lled with
water, see chapter "8.3.5 Initial Start-up" on page
69.
All other LORENTZ PSk3 CS-F pump types have
a second ller plug which can be replaced by a
pressure sensor.
Figure 49: Pressure sensor installation
a
CAUTION – The connection thread
size at the pump housing of the CS-F
pumps is G1/2”. The connection thread
size at the pump housing of the CS-G
pumps is G1/4”.
CS-G pump ends allow the installation of the
pressure sensor at the anges of the suction and
pressure side.
Figure 48: Water Level Measurement Solution
9.6 Pressure sensor installation
The LORENTZ range of liquid pressure sensors are
used to measure the pressure in a pipe. The sensors
are commonly used to measure the pressure at a
well head or feeding into irrigation systems. The
liquid pressure sensor can also be used in constant
pressure applications and as a pressure switch.
Please refer to partnerNET for more information.
To Next Page
Loading...
Need help?
General
