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The Arlec Battery Charger BC906 is
designed to charge most types of 12 Volt
lead acid batteries. It has switchable
charging characteristics:.
‘Boost’
is most suitable for charging
frequently used batteries overnight.
‘Automatic’
should be used where
batteries are left on charge for long
periods and is particularly suitable for
sealed and low maintenance type
batteries.
Before using this charger it is essential
that you read important safety information
on page 5.
CONNECTING THE CHARGER
TO THE BATTERY
The output leads are fitted with battery
clips and coloured for easy identification
of polarity. Red for positive (+) battery
terminal. Black for negative (-) Battery
terminal. Connect the clips to the battery
terminals making sure that they bite firmly
and that polarity is correct.
WARNING
1. Always charge batteries in a well
ventilated area remote from
inflammable liquids and gases.
2. Do not use the charger in the rain
or expose it to water from hoses or
sprinklers.
3. Remove the battery filler caps and
check the level of the electrolyte in the
cells. If necessary, top up with distilled
water so that the electrolyte is 6mm
above the top of the plates. Do not
replace the filler caps until the
charging programme has been
completed.
4. Ideally, disconnect the battery and
remove from the vehicle before
charging. If this is not practical, ensure
that the battery terminal not connected
to the chassis is connected first to the
charger. The other connection is then
made to the chassis, keeping away
from the battery and fuel line. Only after
connecting, switch on the mains supply
to the charger.
6. After charging, switch off the mains
supply. Then remove the chassis
connection and the battery connection,
in this order.
AMMETER
The ammeter provides a useful indication
of the amount of charge accepted by the
battery. If the battery is completely flat
(fully discharged), there may be an initial
full scale deflection of the ammeter needle,
maintained only for a short period
depending on the capacity and condition
of the battery. As the battery charges, the
needle will move gradually down the scale
and stabilise at, or just below the charger’s
continuous current rating. At this stage the
battery will be approaching a fully charged
condition.
PROTECTION
A fully automatic circuit breaker in the
output circuit protects the charger against
overload, short circuits, and reversed
connections to a battery or bank of
batteries. Prolonged charging in excess of
the maximum continuous rating may cause
the circuit breaker to operate, switching
the charger ON and OFF automatically until
the batter has achieved a satisfactory
charge. This will be indicated by the meter
‘cycling’ (needle falling to zero and jumping
