61
Electrical system – Important!
Turn the engine off and switch off power at
the main switches before carrying out work
on the electrical system.
1. Main switch
Never break the circuit between the generator and
batteries while the engine is running. In other words,
the main switches must never be disconnected be-
fore the engine has stopped. If the circuit is broken
while the engine is running, the voltage regulator
may be destroyed and the generator seriously dam-
aged.
Charging circuits must not be switched over while
the engine is running, for the same reason. To
simultaneously charge two independent battery
circuits, fit a Volvo Penta charge distributor to the
regular generator (accessory).
2. Batteries
Never mix up the positive and negative battery
terminals when installing. Incorrect installation can
result in serious damage to electrical equipment.
Refer to wiring diagrams. The battery terminal posts
should always be well cleaned and the cable termi-
nals well tightened and greased to prevent open
circuits.
Avoid boost charging the batteries. If the battery
must be booster charged, first remove both battery
leads.
NOTE! Follow relevant safety regulations when
charging batteries. When charging, unscrew filler
plugs but leave them in their holes. Ventilation
should be good, particularly if the batteries are being
charged in an enclosed area. Always switch off the
charging circuit before removing the battery charger
connectors.
Warning! Never allow an open flame or elec-
tric sparks near the battery compartment.
Never smoke in proximity to the batteries. The
batteries give off hydrogen gas during charg-
ing which when mixed with air can form an ex-
plosive gas – oxyhydrogen. This gas is easily
ignited and highly volatile.
Always use protective goggles when charging
and handling batteries.
The battery electrolyte contains extremely cor-
rosive sulfuric acid. If this should come in con-
tact with the skin, immediately wash with soap
and plenty of water. If battery acid comes in
contact with the eyes, immediately flush with
plenty of water and obtain medical assistance
without delay.
3. See instructions on page 20 for how to start us-
ing auxiliary batteries.
4. Connecting accessories and extra equipment
All extra equipment should be connected to a sepa-
rate junction box and fused. Avoid installing addition-
al power points directly from the instrument panels.
However permitted extra power points must not ex-
ceed max. 5A (for all instrument panels together).
Arc welding
Remove the positive and negative leads from the batter-
ies. Then remove all leads to the generator.
Always connect the weld clamp to the component to be
welded and as close to the welding point as possible.
The clamp should never be connected to the engine or
in such a manner that the current is able to pass over
any bearings.
When welding is complete: Always connect the
leads to the generator before replacing the bat-
tery leads.
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