Accessory Battery - Nilfisk SWEEPER SR 1450 B-D Manuel D'utilisation

ACCESSORY BATTERY

SR 1450 B
Service instructions
For a tubular armoured drive storage battery consisting of 18
cells type 4 HAN 320N - 36 V - Capacity 320 Ah with
discharge in 5 hours. Installed on SR 1450.
Use
The electrical machine should never be used up to the battery
complete discharge. To optimize the battery use, especially in
terms of length of service, only 90% of its capacity should be
allowed to run down over a 5-hour period. The machine
should therefore stop operating when the fluid capacity in the
cells drops to a specific weight of 1.13-1.14, that is the weight
which corresponds to 90% of its capacity. If the density is not
measured, the machine should be stopped at the first signs of
performance drop and the battery should be recharged either
immediately or, preferably, after a few hours of rest. The work
shift length should be programmed taking this requirement
into consideration; otherwise the battery deteriorates
prematurely.
Charge
Charging the battery supplies the battery with the energy
consumed during the machine operation. The initial charge
may be the maximum acceptable, which is: 58A.
The amperage should however gradually drop as charging
goes on so that, when the battery reaches 43.2 V (2.4 per cell)
and the fluid in the cells begins to boil, it does not exceed 19A
(1/3 of the maximum charge).
The battery is charged when:
– The electrolyte density reaches a specific weight of
1.27-1.28.
– The electrolyte is boiling vigorously.
The electrolyte temperature should not exceed 45°.
If charging is carried out automatically by means of a current
rectifier, in addition to supplying the electrical energy spent by
the battery during operation, this device stops charging when
the electrolyte temperature reaches the indicated value. It
should however be kept in mind that of the various parts -
machine, battery, rectifier - the latter is the most delicate.
Should the battery fail to stop charging automatically at the
right moment but continue to charge for hours longer than
necessary (this could occur at the weekend), it would be
damaged to such an extent as to be unusable. Therefore, in
addition to using a top quality rectifier, it is also essential to
check it periodically to ensure that it is kept in perfect working
order. The battery should be charged in a well-ventilated
environment.
When close to the battery, especially during charging, do not:
– Light matches;
– Use naked flames;
– Work with emery grinding wheels or any other
spark-producing tool.
33014811(1)2005-07 A
Overcharge
Batteries which are in good condition do not generally require
overcharging.
Overcharging is recommended for batteries which have not
been used for over 15 days, because completely run down or
faulty etc.
The overcharging current should never be more than half the
normal charging current for a period lasting approx. 9 hours,
divided into three periods (3 hours of charging and 2 hours of
rest).
Special overcharging treatments, where required, will be
recommended by the technicians.
Maintenance
a) Topping up:
The cell electrolyte level should be kept at approx. 1 cm
above the bored surface (splash guard) which can be seen
inside the cells when looking through the plug hole.
When the level drops, leaving the splash guard uncovered,
distilled water must be added until the required level is
reached. The electrolyte level should be topped up equally in
all cells so that its density is even.
This accuracy can only be obtained by means of the
"IMPIDOR" topping up device which is easy to use, not
requiring any particular precision. Topping up could never be
done evenly by using funnels, pipes etc., even if the operation
were carried out with the utmost care.
The topping up frequency depends on the type of efforts to
which the battery is subjected as well as on charging and
temperature. It is, however, important to check the electrolyte
level and density once a week after charging.
If topping up is required increasingly more frequently, this is
due to excessive or prolonged charging. Check and calibrate
the rectifier immediately.
b) Cleaning:
The battery should always be kept clean and dry. This is of
extreme importance to avoid oxide formation on the lifting
hooks or on the battery container edges etc. as this leads to
current leakage and corrosion.
Periodically clean the entire surface of the battery with a
damp sponge so as to remove the film of acid which tends to
deposit during charging.
If the container has a discharge hole (unfortunately not all
containers have one, or can have one) it is possible to clean
the surface with a water jet, thus obtaining far superior results
than with a sponge.
It is not necessary to dry: since all acid traces have been
removed, the cells become dry in a short time.
USER MANUAL
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