Options Available For Qas 14 And Qas 20 Units; Circuit Diagrams; Overview Of The Electrical Options; Description Of The Electrical Options - Atlas Copco QAS 14 Instruction Manual

7.

Options available for QAS 14 and QAS 20 units

7.1 Circuit diagrams

The engine control circuit diagrams and the power circuit diagrams
for the standard QAS 14 and QAS 20 units:
Unit
QAS 14 - 20 Pd Qc1001™
QAS 14 - 20 Pd Qc3001™
QAS 14 - 20 Pd Low voltage

7.2 Overview of the electrical options

The following "electrical" options are available for the QAS 14
and QAS 20 units:
– Automatic battery charger
– Battery switch
– Engine coolant heater
– Output terminal board
– Single frequency with electronic speed control (SF)
– Dual frequency with electronic speed control (DF)
– Electronic speed regulator
– Low voltage (LV)
– Single phase (1 PH)
– Earth leakage relay
– IT-relay
– "Electricité de France" (EDF)
– Refinery equipment pack
2954 2100 01
Power circuit Engine control circuit
9822 0992 00 9822 0992 08
9822 0992 00 9822 0992 09
9822 0992 01

7.3 Description of the electrical options

7.3.1 Automatic battery charger
The "trickle 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 23.5-27.5 V respectively
11.8-13.8 V.
The LED on the front indicates that the unit is operational.
DEIF
-power in control
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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.
7.3.2 Battery switch
The battery switch is situated inside the sound-insulated bodywork.
It allows to open or to close the electrical connection between the
battery and the engine circuits.
!
Never turn the battery switch to OFF during
operation.
7.3.3 Engine coolant heater
To make sure that the engine can start and accept load immediately,
an external coolant heater (1000 W, 240 V) is provided which
keeps the engine temperature between 38 °C and 49 °C.
Instruction manual
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