Starting; During Operation; Stopping - Atlas Copco Qas 108Jd Manuel D'instructions

fill the tank after the days operation to prevent water vapor in a
nearly empty fuel tank from condensing.
Check the vacuum indicator of the air filter. If the red part
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shows completely, replace or clean the filter element.
Press the actuator valve of the air filter to remove dust.
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Check the generator for leakage, tightness of wire terminals,
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etc. Correct if necessary.
Check that circuit breakers Q1.1 and Q1.2 are switched off.
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Check that fuse F4 is set and that the emergency stop is in the
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out position.
Check that the load is switched off.
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Check the correct position of the voltage selector switch (S10)
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on the alternator.

STARTING

To start the unit locally, without using the remote start/stop switch,
proceed as follows:
Put the starter switch in the up position. The unit starts a pre-
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heat cycle that takes approximately 12 seconds.
After the pre-heating period, the unit will start. The starting
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attempt will take a maximum of 12 seconds. If the unit does
not start immediately, it will perform another two starting
attempts.
Check that the warning lamps on the control and indicator panel
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are out. Refer to " Control and indicator panel" for component
locations.
Run the engine for approximately 5 minutes to warm up.
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Check the engine oil pressure (P9) and the cooling water
temperature (P8).
Check the voltmeter P4 (with voltmeter selector switch S4 in
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different positions) and the frequency meter P5.
Switch on circuit breaker Q1.1 and Q1.2 (depending on the
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mode the unit is running in).
Switch on the load and check ammeters P1, P2 and P3,
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voltmeter P4 (with voltmeter selector switch in different
positions) and frequency meter P5.
To start up the unit from a remote location using the remote start/stop
switch, proceed as follows:
-Put the starter switch in the lowest position.
- Switch on circuit breaker Q1.1 or Q1.2 (depending on the mode the
generator is running).
- Put the remote start/stop switch in position start. The unit starts a
preheating cycle that takes 12 seconds.
- After the preheat period, the unit will start. The starting attempt will
take a minimum of 12 seconds. If the unit does not start immediately,
it will perform another two starting attempts.
- Approximately 15 seconds after starting, the timer relay closes the
voltage free contact and the plant contactor is energized (if installed).
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- Check that the warning lamps on the control and indicator panel are
out. Refer to " Control and indicator panel" for component locations.
- Check the voltmeter (with voltmeter selector switch S4 in various
positions) and the frequency meter P5.
- Switch on the load and check the ammeters P1, P2, and P3. Check
the voltmeter P4 (voltmeter selector switch in various positions and
frequency meter P5.

DURING OPERATION

The following points should be carried out regularly:
- Check the engine gages and lamps for normal readings.
Avoid letting the engine run out of fuel. If this occurs, priming
may be required to restart the engine.
- Check for leakage of oil, fuel or cooling water.
- Avoid long low load periods. In this case, an output drop and higher
oil consumption of the engine could occur.
- Check, be means of the generator gages, that the voltage between
the phases is identical and that the rated current per phase is not
exceeded.
- When single-phase loads are connected to the generator output
terminals, keep all loads well balanced (in 3-phase output voltage
mode).
If circuit breaker Q1.1 or Q1.2 has tripped during operation, switch off
the load and stop the generator. Check, and if necessary, decrease
the load.
The generator' s side doors may remain open only for short periods
during operation, to carry out routine checks for example.

STOPPING

To stop the unit when the starter switch is in the up position (normal
running mode), proceed as follows:
Switch off the load.
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Switch off circuit breakers Q1.1 and Q1.2.
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Let the engine run for about 5 minutes.
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Stop the engine by putting the starter switch in position O.
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To stop the unit when the starter switch is in the low position
(remote start/stop mode), proceed as follows:
Switch off the load.
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Let the engine run for about 5 minutes.
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Stop the engine by putting the remote start/stop switch in
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position stop or by putting the starter switch in position O.
Lock the side doors and the door of the control panel
to prevent unauthorized access.
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