Xylem Fire diesel pump D Series GEN D Series - Manual (Page 58)

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 Disconnect the battery cables and check that the poles and relative terminals are not
oxidised or damaged. Remove any oxidation with a metal brush, taking care not to
generate short circuits or the like.
 If present, loosen the caps to vent any gas inside the battery.
 Inspect the electrolyte level. The electrolyte must always cover the metal plates inside the
battery/ies. In some cases, the level is also indicated on the battery casing. Only top up with
distilled /demineralised water and wait for the formation of the relative gas to cease.
 Check the density of the electrolyte with the density meter in order to assess the battery
charge, following the battery manufacturer's instructions. Remember to tighten the caps
after using the density meter.
 Check the battery charger installed inside the diesel pump electrical starting control unit by
reading the diagnostic LED's
A battery is deemed to be charged if its no-load voltage is greater than 12.4V.
Battery charging must observe certain restrictions imposed by the manufacturer.
Use battery chargers with a max. constant voltage of 15V and with charging
current limits. If the no-load battery voltage is lower than 9V, disconnect the
battery from the machine and recharge it using a high capacity quick charge battery
charger.
ATTENTION: If the batteries remain uncharged for a long time (over 6 months) they could be
difficult to recover (they must often be replaced).
The batteries contain sulphuric acid and release an explosive gas, especially during charging.
All the precautions indicated in current laws and regulations must therefore be observed.
Keep naked flames and cigarettes away from the batteries and avoid generating any sparks.
When installing a battery always connect the positive terminal first. To disconnect the battery,
always start from the negative ground terminal.
ENGINE HEATER (230Vac 50÷60Hz)
A heater is installed on most engines used for firefighting diesel pump applications; the
heater can be of two types:
OIL HEATER : (special heating element located under the engine oil sump)
WATER HEATER : (heating element located in the engine base).
This device is designed especially for the starting of diesel engines at low temperatures, or for
applications where an immediate output of power is required. The heater is always equipped
with a thermostat that cuts off the power supply as soon as the set temperature is reached.
All the heaters must be connected to ground ( this is done by the electrical connection cable).
The heaters are powered with 230Vac. It is absolutely forbidden to carry out any work if the
equipment is still being powered.
As a general rule, the heaters do not require any maintenance.