Atlas Copco QAS 275-325, Instruction Manual

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Options available for
QAS 275-325 Volvo units
Circuit diagrams
The engine control circuit diagrams and the power
circuit diagrams for the standard QAS 275-325 Volvo
units, for the units with options and for the units with
combined options are:
Power circuit
Unit Circuit
QAS 275-325 9822 0993 30
QAS 275-325 Qc4002™ 9822 0993 28
QAS 275-325 dual voltage 9822 0993 31
Controller circuit
Unit Circuit
QAS 275-325 Qc1002™ 9822 0993 25
QAS 275-325 Qc2002™ 9822 0993 26
QAS 275-325 Qc4002™ 9822 0993 28
Overview of the electrical options
The following electrical options are available:
– Automatic battery charger
– Engine coolant heater
– Outlet sockets (S)
– Dual voltage (2V)
– “Electricité de France” (EDF)
– COSMOS™
Description of the electrical
options
Automatic battery charger
The automatic battery charger charges the battery
completely and is disconnected once the unit starts
up.
Besides the output terminals (secondary side) the
automatic battery charger has a trim potentiometer for
setting of the output voltage. By means of an insulated
slotted screwdriver or adjusting pin the output voltage
can be set in the range.
The LED on the front indicates that the unit is
operational.
Setting:
– Lower output voltage = counterclockwise rotation
– Higher output voltage = clockwise rotation
To use the batery charger:
– Provide the X25 connector, located at the side of
the power cubicle, with external power to use the
battery charger.
Engine coolant heater
To make sure that the engine can start and accept load
immediately, an external cooling water heater
(2000 W, 240 V) is provided which keeps the engine
temperature between 38°C and 49°C.
DEIF
-power in control
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