Fig. 14 Battery isolating switch
1 «Battery isolating switch»
4.7.4 Option la, lb
Options for operating in fire hazard areas
Diesel engines represent a potential source of ignition in environments with concentrations of gas,
vapour or dust, and may cause major fires with disastrous consequences for people, the environ‐
ment and the production.
For the operation in fire hazard areas, the machine is equipped with the following accessories:
■
Engine air intake shut-off valve
■ Spark arrestor
4.7.4.1 Option lb
Engine air intake shut-off valve
If flammable gases and vapours are drawn by the Diesel engine from the environment into the air
intake, they will act like catalytic converters. This causes a sudden and uncontrolled increase in en‐
gine speed that can result in serious mechanical damage. Without appropriate preventive meas‐
ures, the engine and compressor can be destroyed. Explosion or fire are also possible.
When flammable gas is drawn into the engine, shutting off the fuel supply will not stop the engine
right away. In order to shut down the engine quickly and reliably in these events, the intake of the
combustion air must be interrupted.
If a certain engine speed is exceeded, the engine controller closes the engine air shut-off valve for
intake air. This brings the engine to an immediate stop.
4.7.4.2 Option la
Spark arrestor
Sparks in exhaust fumes represent a considerable risk in environments with flammable materials.
Flying sparks combined with flammable materials may cause fires and explosions.
A spark arrestor on the exhaust silencer is required when operating a diesel engine in a fire hazard
area and in forestry and agricultural applications. In such applications, a spark may ignite flamma‐
ble materials.
The spark arrestor prevents the exhaust silencer emitting any glowing fuel residue.
4 Design and Function
4.7 Options
No.: 9_6999 23 USE
Operator Manual Screw Compressor
M100
53
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