Accessory Battery - Nilfisk SR 1450 B Manuel D'utilisation

ACCESSORY BATTERY

SR 1450 B
Service instructions
For a tubular armored drive system storage battery made of 18 elements such as: 4 HAN 320N - 36 V - Capacity 320 Ah at
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 fl uid capacity in the cells drops to a specifi c 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 fi rst 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 of the
maximum acceptable level which is 58 A.
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
fl uid in the cells begins to boil, it does not exceed 19 A (1/3 of the maximum charge).
The battery is charged when:
– The electrolyte density reaches a specifi c 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 rectifi er, in addition to supplying the electrical energy used 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, rectifi er - 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 rectifi er, 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 fl ames;
– Work with emery grinding wheels or any other spark-producing tool.
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
rectifi er 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 fi lm 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.
SR 1450 B-D 33014811(3)2010-03 A
USER MANUAL ENGLISH
27