DOCK LIFEGUARD DOCK LIFEGUARD, Руководство пользователя

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Upon installation, my units is alarming but I know my dock is wired correctly,
why is this?
Most likely it is an improper bonding issue. Have your safety ground bonding system checked by a
qualified electrician.
My unit is alarming, and I have checked my safety ground bonding system .
where is the stray electricity coming from?
The Dock Lifeguard Unit is designed to detect any stray electricity whether it is at a lethal or non-lethal
level. Below are listed a few scenarios which may add in determining where your stray electricity is
coming from:
- Dock De-Icers : Water aerators placed in the water are susceptible to leaking stray
electricity in the water. If your unit is detecting stray electricity around your dock, try
isolating the De-Icer unit that is causing the problem by unplugging your or your neighbors
De-Icer and seeing if the stray electricity goes away.
- Underwater Water Pumps : Underwater water pumps are subject to leaking electricity in
the water. A lot of these underwater pumps are 220Volt and are ran on non-GFCI’d
breakers. If you are using an submersible water pump, it may be a good time to change
it out to an above water pump. Current trend of governing bodies of lakes is to disallow
underwater pumps and only allow above water pumps.
- Ambient Voltage of Water : Each body of water will inherently have some small level of
electricity in it. In most lakes this is between 0.05 and 1 volt. Depending on your
sensitivity settings of your unit, then number of LEDs shown on the front of the display
will reflect this ambient voltage. i.e. You sensitivity jumper setting is set to 0.25 volts and
you have 0.8 volts of ambient voltage in the water, then 3 LEDs will be lit on the Dock
Lifeguard. Note: Ambient voltage of your lake can be checked by using a standard volt
meter and placing one lead in the water and the other touch the GROUND plug of an
outlet.
- Back Feed from your Home : If you have a well-grounded dock with a grounding rod < 25
ohms, but your homes grounding rod is above the 25 ohm threshold, your electrical
system may run into the situation where non-lethal stray electricity from your home (i.e.
From a A/C Unit or Heat Pump) may bypass the home’s grounding rod and feed down to
the grounding rod with lower resistance (The Dock) which is tied to your dock. To correct
this situation you will need to correct the ground resistance of your home’s grounding rod,
or you can run an isolated grounding rod to feed the Dock Lifeguard unit. In certain areas
of the country where hard water is prevalent, the heating element of yours (or your
neighbors) may short out and put electricity back on the ground wire which can be back
fed down to your dock.
- It may not be your house or dock: Any nearby house or dock that shares the same safety
ground from a shared transformer has the potential of putting hazardous electricity back
on the ground wire and then having it back fed to your dock.. Not only check your house,
but check surrounding houses and docks for stray electricity.