hymer BMC 550, Instruction Manual

Page: 113 / 252

Electrical system 8
B-MC - 12/18-2 - EHG-0016-01EN
113
8.3.4 Starter battery
The starter battery serves for starting the engine and supplies the electrical
appliances of the base vehicle as well as optional devices such as the radio,
navigation system or central locking system with voltage.
The starter battery is installed in the double floor and is accessible via a floor
trap in the living area.
This section contains information regarding the discharge of the starter bat-
tery.

Total discharge damages the battery. The consequence may be defor-
mation, heat development, and damage due to scorching.

Once a battery with acid is discharged, it can freeze in temperatures of
below zero. This damages the battery.

Recharge battery in good time.
The starter battery will be totally discharged via a closed circuit current (in-
active appliances). Inactive appliances are optional devices such as a radio,
alarm system, navigation system or a central locking system. Inactive appli-
ances discharge the starter battery when the vehicle engine is switched off.
Low temperatures outside reduce the capacity available.
This section contains information regarding the charging of the starter bat-
tery.
 The acid in the battery is poisonous and corrosive. Any contact with
the skin or the eyes is to be avoided. In the event of contact, rinse im-
mediately with plenty of water (skin, eyes, clothes, objects) and seek
medical attention if necessary.
 In the case of charging with an external charger there is danger of ex-
plosion. Sparks can be caused by attaching the battery terminals.
Only charge the battery in a well ventilated area and away from naked
flames or possible sources of sparks. Batteries can develop and re-
lease gases when they are charged.

Never disconnect the battery while the engine is running.

Before disconnecting or connecting the terminals of the battery, switch
off the vehicle engine as well as the 230 V and 12 V power supplies and
all appliances. Danger of short circuit!

Before a temporary lay-up, charge the battery fully.

Do not connect the battery cables to the wrong poles
(red cable -> positive pole, black cable-> negative pole).

If the starter battery or living area battery are disconnected, do not apply
the ignition. There is a danger of short circuit from exposed cable ends.

Observe the instruction manuals for the base vehicle and the charger.
The starter battery can only be fully charged with an external charger. When
the vehicle is connected to the 230 V power supply, the transformer/rectifier
charges the starter battery with a float charge only. Even in mobile opera-
tion, the vehicle engine alternator has a limited capability of completely
charging the starter battery.
Position
Discharging
Charging