Polar Electro 520 CTH DB 2020, Instruction Book

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Electrical system
The battery contains corrosive acid that can
cause serious corrosive injuries and damage.
If the acid comes into contact with eyes, skin,
clothes, etc., rinse with copious amounts of
water. In the event of acid splashing into the
eyes, rinse with copious amounts of water
and contact a doctor.
If the battery acid escapes into the caravan,
it is most easily neutralised with a mixture
of 1 dl bicarbonate to 10 l water.
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Maintaining the battery
By following the advice given below, you can extend the
life of your battery:
• Keep the battery dry and clean. Dirt, oil and petrol
reduce the output and can damage the battery.
• Apply a little grease or Vaseline on the battery’s
terminal clamps. This prevents oxidation and hence
poor contact.
• Do not over-exert the battery - this reduces its service life.
• Do not short the battery - e.g. with tools - as the
battery can easily be ruined.
NOTE!
There is a risk of sparks, e.g. when removing/instal-
ling the battery, when jump starting and when charging.
Connect the ground lead last when installing the
battery, and disconnect the ground lead first when
removing the battery.
• Check the acid level from time to time, at least every
2 months. The level should be approximately 10 mm
above the lead plates. If necessary, top up with distilled
water. Never use anything other than distilled water.
• Check the battery’s charge status from time to time
using an acid meter or test instrument. If the acid weight
(the density) is below 1.22 g/cm
2
and the battery voltage
is lower than 12.4 V, the battery must be charged.
• The battery can be charged quickly or slowly. The
latter method should be used if the battery is in poor
condition or if it has not been used for a long time.
The acid density of a fully charged battery at +20°C
= 1.28 g/cm
2
.
• If the acid weight in the cells differs by more than five
division lines on the acid meter, the battery is dead.
• Batteries that are not going to be used should be fully
charged when placed in storage.
• If the battery is to be stored for an extended period,
store it in a cool place.
The ventilation hose from the battery must
be routed out through the floor.
Only batteries with a ventilation hose may
be used.
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When charging the battery, explosive gas is
generated. Avoid flames and sparks close to
the battery.
∆
If the battery is removed from the caravan, the
battery’s cable terminals must be positioned so that
they cannot come into contact with each other.
∆
Protective goggles must be worn whenever
working on the battery.
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Battery
All caravans have a 12 V battery. The battery is located in
a battery box with a locking belt in one of the caravan’s
wardrobes, except for certain caravans where the battery
may be located in a bed box.
A ventilation hose runs from the battery and out through
the floor. The hose removes the gases that are formed in
the battery, in particular during charging.
In cold conditions, the battery’s ability to produce current
is reduced. However, its capacity is not lost. It regains
full capacity when warmed up.
Ventilation hose Battery box with battery
Facts and figures
Voltage 12 V
Capacity 75 Ah
Turn off all the 12 V’s users before the battery
is connected or disconnected
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