Corrosion Protection
15 Your boat is protected against galvanic corrosion
by sacrificial zinc anodes The following is gener-
al information about corrosion protection Consult
your boat manual or boat dealer for detailed infor-
mation concerning your boat model
The zrnc anodes must be replaced when 50%
eroded When replacing anodes, scrape the sur-
face cEean so that good metallic contact is made
between the anode and the surface
To remove any oxide coating from the anodes
surface clean w~th coarse emery or sandpaper;
just before launching Also new anodes shou[d
be cleaned Cleaning should be done frequently
on boats that are stored on land when not used
Note! Steel brushes or other steel tools must not
be used for cleamng of the zinc anodes as they
can deteriorate the galvanic protection
The galvamc corrosion protecbon can malfunc-
tion if stray currents from the electrical system
occur This can happen if the wrong type of
equipment is used or the connection of electrical
equipment to the negative pole is incorrect The
following should always be observed
The main switch for the engine should be con-
nected to the positive (+) pole of the battery The
main switch should disconnect all circuits. Electn-
cal cables should be routed and clamped so that
they are not exposed to dampness or the rtsk of
exposure to water m btlge
If several battenes are used, there should be
separate switches for extra equipment There
should also be a mare sw~tch between the post-
tlve (+) pole of the extra battery and the fuse
panel for the boars electrical equipment The
mare switch for the extra battery should discon-
nect all circuits connected to it and should be
switched off when there is no longer a need for
electricity The main switch for the engine should
be dtsconnected when the engine ~s not m use
The engine and drive tram must not be electhcal-
ly connected with other equipment such as trim
tabs, ladders etc The engine and reverse gear
must not be used as ground for radio or naviga-
tion equipment or other electrical equipment
where separate ground cables are used All such
separate ground connectJons should be gathered
to a common ground point separated from the
eng~ne/dnve
If shore power is connected, no protecbve AC
ground must be connected to the engine or any
other DC ground points m the boat unless an ~so-
iation device is installed
The transformer for shore power should have the
protective AC ground on the input side (120/
220 V) and the negative
(-) connection on the output stale (12/24 V) with-
out any connection to each ot!,~er
A
WARNING! E[ectrolyt~c corrosion due to stray
currents can in a short t~me cause severe and
expensive damage to the boat’s s equipment
All work involving the boat’s s low voltage c~r-
cult shoutd only be done by trained or knowl-
edgeable personnel Installation or work with
shore power equipment must only be done
by a quahfied manne electNc~an, authorized
for high voltage installation
7788827 - Ladattu osoitteesta www.volvopenta.com 17.11.2010 12:21:31
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