B/W Electrode systems
are one of the best ways to protect your water well submersible pump from
running dry and being damaged. B/W relays are placed between your pump
power supply and the controls for your submersible pump. From the BW
relay, 3 electrode wires are run to the well and down to the electrodes
hanging in the well. The lowest electrode is your liquid ground electrode,
which goes below the pump, makes certain that proper ground is provided to the other two
electrodes. One BW electrode is installed just above the submersible pump
as the cutoff electrode. This electrode turns off the power before your
pump starts to run dry. The Upper electrode is placed at a level below
your static water line, and up from the cutoff electrode far enough to
allow recovery time before the pump restarts. Once the water rises to a
level where it covers the upper electrode, the B/W relay resets and allows
power to go to the pump controls.
LH Low Water
DEAN BENNETT SUPPLY
Toll Free 1-800-621-4291
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F&W Water Well Pumps
Submersible Pump Wire
Water Pressure Tanks
Stainless Steel Water Pressure Tank Fitting Kit
Stainless Steel Check Valve
Heat Shrink Wire Connector Kit has stakons and heat
shrink for a water tight connection.
Pipe Setting Clamp
PVC Schedule 80
Drop Pipe used to set
is used with the Economy
Drop Pipe Elevators
and Pipe Setting Clamp
Economy Pipe Elevators
for setting pipe.
BW-LH "Low Water Cut Off"
Electrode System for Protecting a pump in a water well from running dry.
The "LH" series BW Electrode Control will protect your pump
in the well from running out of water and burning up. BW "LH" controls are
available for 230 Volt and 115 Volt pump installations. Please specify the voltage of your
The electrodes are hung in the well at different heights to control turning off and
resetting the control.
The BW control uses 3
electrodes to protect your pump when water drops to a dangerous level. The first electrode
is the ground to liquid electrode. It will be hung in the well below the other 2
electrodes. This assures a proper grounding of the sensor control and proper performance.
A ground to a ground stake is not adequate to make your system work right.
BW Electrode Systems in pdf
The next electrode is above the ground electrode and
provides the power cut-off when the water level drops below it.
The upper electrode is set at a level that allows
your well to recover to an adequate
level before allowing the pump to restart. This
protects against rapid cycling on and off. Your pump will not run after cut-off until
water covers both the low water cut off and the upper reset electrodes.
||Low water cut-off control with Nema 1 enclosure.
Specify voltage ( either 115 V or 230 V )
115V uses BW #1500-C-L1-S7-N1-X Relay
230V uses BW #1500-C-L2-S7-N1-X Relay
* If you have very soft water, specify that you need the S8 secondary coil
which is a 360V coil as a
Special Order Item.
enclosure should be protected from the elements.
|$ 37.95 each
Stainless Steel Electrodes
|Three stainless steel
wire suspension electrodes are required.
Price is for each electrode.
Electrode Wire by the
|18 gauge stranded copper wire with PVC insulation is available in Black, Red, and
Green for your three electrode lines for easy
Electrode Wire Full Rolls
|500' Full Rolls of Electrode Suspension
Wire 18 gauge stranded copper wire with PVC insulation.
Specify Color Red, Clack or Green.
|$ 1.05 ft.
BW #6013-SW Electrode
|BW #6013-SW Electrode
Wire is a fancier electrode suspension wire. It is available by the foot in
Black only. Type SW Suspension Wire is designed to provide maximum strength
and insulation. Type SW wire is single conductor 18 gauge 41 strand copper
with 4/64" vinyl insulation. SPECIAL ORDER ONLY.
Since you have 3 electrodes, you will need 3 lengths of wire. Mark
each wire to know which it is, since all wires are Black.
SPECIAL ORDER / NO
RETURNS ON BW WIRE
Minimum BW SW wire order 30'
Installation Instructions for the "LH" BW
This is the standard BW box used for 1 HP or smaller size
The 1500C sensor control will protect your pump from running
dry when the water level drops to a dangerous level in the well.
Proper wiring of this unit is important to allow it to
perform properly. The unit is wired between your power source and your pump control box.
The wire from your power source will have 2 wires that are
hot with electricity. These will be referred to as L-1 and L-2.
L-1 will connect to the BW terminal #3
L-2 will connect to the BW terminal #4
From the BW #3, install a jumper wire to BW #5
From the BW #4, go into the pump control box to L-2 input
From the BW #6, go into the pump control box to L-1 input
Now it is time to set up your stainless steel electrodes for
in the well.
There are 3 electrodes used in the proper installation. It is recommended that you
leave the wire above each electrode hanging free in the well, at least 6" to 12"
to prevent deposits from forming on the electrode that could cause false readings to the
sensor control. It is also recommended that you place a bit of silicone gel on the top of
the electrode cover where the wire goes in, to prevent water from getting into the top of
the cap and being held there when the water drains from the bottom of the electrode. This
will prevent false readings caused by water in the cap.
You may choose to lay out the wires for your electrodes on
the ground to get them ready to install in the well. This way, you can measure the
distance you desire between the electrodes, and tape the wires together so they hang as a
unit. Remember to leave the ends near the electrode free, so it can move with the water.
BW sensor #7 is jumper wired to BW sensor #9.
BW sensor #9 then goes to the upper level electrode in the well. This electrode is
the one which resets the control to allow your pump operation after the power has cut off
due to low water level in the well.
BW sensor #8 goes to your low level cut off electrode. When the water level drops to
the level where this electrode is out of the water, the power to the pump will be shut
BW sensor #10 goes to a liquid ground. This should be hung in the well somewhere
below the lower level cut off electrode. NOTE connecting this terminal to a ground
stake will not provide a proper ground, and may make the control malfunction. Ground must
be to liquid.
||When using larger than 1 hp pumps, you will need a
wired in to assure proper operation.
When you are using a pump that is 1-1/2
hp or larger, you need the unit displayed below.
#LH230112 is the same as the unit above, however it is wired with a
contactor to use with your larger pump system. It comes in a larger
metal box, pre-wired to make hookup simpler.
Those of you who want to
prevent the pump in the well from running out of water, while also being able to
turn on the well pump to keep the cistern full, will need a dual relay system
using both the 1500 C L2 S7 and the 1500 D L2 S7 relays wired together to
protect your well pump, and to keep you water cistern full.
Wiring instructions for dual relay
COMBINE BW SYSTEMS WITH OTHER ITEMS IN
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Cistern Water Level Control
our catalog in pdf format
Prices effective December 13, 2011