Dynacord DEM 313 owner manual 503, 504, 502, 501

F 503

S 504

S 503

S 502

S 501

Fig. 3 PCB 85254 Location of the wire jumpers S501 - S504 for altering mains voltage and position of the output fuse F503

5. Battery charging

5.1 Charging the batteries in the battery modules DEM 316 or DEM 317

Once the charging unit has been connected to the battery module correctly, (see Section 3) and the mains voltage is present the green LEDs (3) LINE VOLTAGE, BATTERY VOLTAGE and CHARGE CURRENT light up. The charging current is indicated on the LC display (1), if switch (2) is in position A.

The battery is charged with constant charging current of approx. 4 A. As charging is completed, the charging current decreases rapidly with rising back-e.m.f. of the battery. At the end of charging, the charging current falls to a small floating current of approx. 1 mA/Ah of the capacity of the battary to the loaded, a value which is permanently compatible for the battery. This value can vary with older batteries in particular, amounting to between 0.5 mA and 10 mA per Ah.

Note: lf the connection is faulty, there is no charging current and the green LED (3) CHARGE CURRENT does not light up. Please check all connections between the battery and the charging unit, all fuses and the mains voltage.

The capacity retention of the battery takes place with a constant voltage of 27.3 V at 20°C. The charging voltage is indicated by the LC display (1), if swith (2) is in position V. lf the ambient temperature deviates from +20°C in standby mode, the charging voltage is adapted automatically, depending on the tempera- ture. The temperature coefficient amounts to -40 mV/°C for a 24 V battery.

Note: The charging unit is designed for the connection to one battery module. A parallel connection of batteries is not recommended. Batteries connected in parallel cannot be monitored.

Attention: The charging circuit fuses CHARGE FUSES of the battery modules DEM 315 and DEM 316 must be exchanged for 7.5 A fuses if the charging unit DEM 313 is used. In the event of a faulty fuse, no charging current flows and the green LED (3) CHARGE CURRENT does not light up.

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