FlexiROC T30 R 13 Electrical System
93 No: 3629357835.1.3629419915 en-US
the battery is probably expended. Rapid charging, when carried out correctly, does not
damage the battery. Rapid charging must rarely be undertaken and is not recommended
for old batteries. Repeated dischargings for long periods impair the service life of the bat-
tery. Avoid, for example, leaving the lights on while the engine is stationary. Discharging
with high current is not normally harmful.
Since the 24-V electrical system is powered by two 12-V batteries that are connected in se-
ries, observe:
n The batteries must have the same capacity (Ah).
n The batteries must be the same age because the charging current required to bring a
battery up to a certain voltage changes with age.
n The batteries must not be loaded unevenly.
n Series coupling maintains the same capacity but increases the voltage. For example,
when 2 x 12 V 60-Ah batteries are connected in series, the voltage is 24 V but the ca-
pacity remains at 60 Ah.
n Use a 24-V charger when charging both batteries connected. Use a 12-V charger
when charging each battery individually. Observe the voltage before connecting a bat-
tery charger.
13.5 Charging Battery Using External 24V Charger
WARNING
Risk of Fire and Explosion
Gas that is formed in the battery during charging and dis-charging is explosive which
can cause serious personal injury and damage to property.
u Avoid open flames and sparks.
u Ensure good ventilation.
u Disconnect the negative terminal first, and connect it last.
u Disconnect the fire-fighting system.
u Use protective glasses.
u Use protective gloves.
1.
Turn off battery isolation switch.
2.
Disconnect the cable between chassis ground and the negative terminal on battery
(A).
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