Sea Ray 320 Sundancer, Руководство пользователя

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6.26
S
ECTION
6 • E
LECTRICAL
S
YSTEM
320 Sundancer
®
(355 Sundancer
®
)
Never disconnect the green wire (safety ground) from
the engine terminal.
! CAUTION
17. E
LECTROLYTIC
C
ORROSION AND
Z
INC
A
NODES
Electrolytic corrosion of metals on power boats can result
in rapid and serious deterioration of metal parts. You
must set a regular schedule and look for the possibility
of electrolytic corrosion (the deterioration of metals due
to dissimilar characteristics when placed in salt water).
It is your responsibility to check for and replace parts
damaged due to electrolytic corrosion.
To minimize electrolytic corrosion of the metals on your
boat, zinc anode plates are provided on your boat to
protect underwater hardware. Zinc, being much less
"noble" than the copper-based alloys and aluminum used
in underwater fittings, will deteriorate first and protect the
other metals.
Stern drives are fitted with zinc anodes on their lower
units (refer to your Engine Owner's Manual for their
locations). If your boat is equipped with trim tabs, zinc
plates are installed on each of the trim tabs. If boat is
equipped with Mercathode
®
stern drive may not have
zincs.
Zinc anodes require replacement about every six months,
if the boat is operated in salt water. In fresh water, the
zinc anodes can be replaced about once a year.
If the anodes deteriorate more rapidly than this, there is
probably a stray current problem within the boat or at the
slip or mooring.
If the anodes do not deteriorate, they are not protecting
the other metallic parts of your boat. This can be caused
by loose anodes or by low grade zinc or by not having a
solid electrical contact between the anode and the metal
it contacts, or by paint on the anodes.
If the anodes are deteriorating rapidly, or not at all, contact
your dealer.
When an AC shore power system is connected to the
boat, the underwater metal fittings will, in effect, be
connected through the water to grounded metals ashore.
This results in the zincs being consumed at a faster rate
unless the marina maintains a protective system to
prevent this. When the marina provides a zinc anode in
the water bonded to the metal outlet box on the dock,
zinc loss on the boat will be reduced. Do not connect
this zinc to the boat's ground system.
NOTICE
DO NOT PAINT BETWEEN THE ZINC AND THE
METAL IT CONTACTS, AND DO NOT PAINT OVER
THE ZINC.
It is extremely important that all electrically-operated DC
equipment and accessories be wired so that the ground
polarity of each device is the same as that of the battery.
Your boat has a negative ground system. The zinc anode
is connected to every metal item in the boat (fuel tanks,
underwater gear, etc.) via the green bonding wire.
Galvanic Isolator: Electrolytic corrosion can also be
caused by "stray currents" due to a fault in an electrical
item, even though correctly grounded. A galvanic current
isolator (zinc saver) is standard on all Sea Ray
®
boats. It
is installed between the shore power ground and the boats'
AC grounding connection to the DC bonding system. This
connection maintains the safety ground from dockside
power while stopping the flow of DC corrosive currents.
The galvanic isolator is located in the transom storage
compartment behind the shore power and accessory
panel.
TRIM TABS
ZINC ANODE
S
TANDARD
I/O S
TERN
D
RIVE
E
NGINE
Z
INC
A
NODES
O
N
T
RANSOM
&
T
RIM
T
ABS
(F
IG
. 6.26.1)