Doosan 7/26E, Operation And Maintenance Manual

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46 OPTIONS
7/26E, 7/31E, 7/41
OPERATING INSTRUCTIONS
A mode selector switch is provided to switch the machine between
compressor and generator mode.
When the switch is in the Generator position the normally-open
solenoid valve switches to the closed position and air in the line to the
engine speed control cylinder vents to the atmosphere via the solenoid
exhaust port. This causes the cylinder to move to its maximum speed
position. The engine will now maintain maximum speed as the air line
from the pressure regulator valve to the solenoid valve is now closed.
When the switch is returned to the Compressor position, the solenoid
valve is de-energised thus returning it to its normally open position. The
engine speed cylinder would then respond via the pressure regulator
valve according to the air demand.
When connecting electrical equipment to any of the socket outlets, it is
recommended that the appropriate MCB is in the
OFF position before
making the connection, switching the MCB to the ON position
immediately prior to using the equipment.
PRIOR TO STARTING (GENERATOR)
If the generator should become exposed or saturated with moisture/
water deposits, it must be safely dried off before attempting to make
any part or conductor electrically live. This should be done by wiping
away excess water, then running the engine with no electrical loads
connected, until the generator is completely dry.
Ensure all persons concerned are suitably competent with electrical
installations.
Ensure that there is a safe working procedure which has been issued
by supervisory personnel, and that it is understood by all persons
concerned with the operation of the generator.
Ensure that the safety procedure to be applied is based on the
appropriate national regulations.
Ensure that the safety procedure is followed at al times.
Ensure that suitable guidance codes are available to indicate safe
working practices, and any hazards to avoid.
Before starting the engine and switching in the generator load, ensure
that :-
• The system has been inspected and earthed.
• No persons are in a hazardous position.
• Any warnings necessary have been suitably displayed (where
applicable).
Ensure compressor / generator mode switch is set to compressor.
CAUTION: Do not start or stop the machine with the compressor/
generator mode switch in the Generator position.