4
Important notes
for battery handling
GB
B3.2 Charging during operation
The charging current is engineered in such a way
that a discharged battery will have within 14 h
approx. 90% and within 20 h approx. 100% of its
capacity.
In emergency operation the battery voltage is
monitored via a deep discharge protection which
prevents a deep discharge of the cells.
It is recommended to have one or two fully
discharges per year. This increases the usable life
time of the battery.
Should this not be possible due to logistic and
safety reasons at least a partial discharge of a
minimum of 40 minutes or 2 hours depending on
the setting, is recommended.
B3.3 Charging after storage
After a long storage of the batteries a full
uninterrupted charge for 20 h should be applied
followed by a full discharge down to deep
discharge protection (emergency lamp off).
Charge again for min. 14 h.
IIn order to reach full battery capacity after
longer storage, it is recommended to have 3
charging/discharging cycles.
B3. Charging
B3.1 Initial Charging
Battery charging starts when the power is
switched on. On the connection of a new battery
the indication of the charge state may be delayed
by a few minutes. The green LED might take a
few minutes to start flashing.
After a charging period of 14 hours the battery
will have reached approx. 90% of its rated
capacity. As the capacity of the battery is over
specified, this 90% will be sufficient to provide
a rated discharge for both a 90 minute and
180 minute setting.
Initial charging at 0 °C ambient temperature
might take double the time than at tempera-
tures of >10 °C.
After first mains connection an uninterrupted
charging time of 20 hours is recommended to
avoid early ageing due to power-on power-off
situations. The battery set is only partially
charged when supplied.
If the battery set is completely discharged (e. g.
after a long storage period), the time to reach the
rated capacity can be considerably extended.
Multiple switching (on - off) of the mains
circuit should be avoided before a first initial
charge (recommended 20h, minimum 14h) is
achieved. Such interruptions can significantly
reduce the lifetime of the battery.
Recommendation: New batteries will reach the
full utilisable capacity after approx. 3 charging /
discharging cycles.
B1. Safety instructions
Target group:
or skilled electricians and suitable qualified,
instructed personnel in accordance with
national legislation, including the relevant
standards and, where applicable, in acc. with
IEC/EN 60079-17 on electrical apparatus for
explosive atmospheres.
B2. General information about
the charging technology
For electrochemical reasons charging and the
capacity are influenced at temperatures below
-5 °C and above +35 °C.
At temperatures below -5 °C and above +35 °C
charging will take a longer time and full charging
is not guaranteed.
