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Gas system
Note:
The gas tract is not included in MAN's extent of delivery. The starting up, oper-
ation, monitoring of the operational safety, servicing and care of the gas system
must be carried out in accordance with the manufacturer's instructions.
Adjustment when starting up
When the engine is first started up a suitable fuel / air mixture for the gas type used must
be set. Any deviations from this will impair the power output, the engine efficiency and
the exhaust gas emissions.
The requirements relating to gas quality can be found in the "MAN Data Sheet − Mini-
mum Gas Quality Requirement for MAN Gas Engines".
The operating pressure for natural gas must be at least 20 mbar.
The gas pressure should remain as constant as possible within this range.
To achieve a correct gas / air mixture the inlet air in the engine chamber must be at a
temperature between 15 and 30_C.
The gas must not contain any condensate when it enters the gas mixer.
Faults
We urgently recommend that malfunction is repaired in an authorised specialist work-
shop.
Air filter
The maximum pressure difference downstream and upstream of the filter must not be in
excess of 35 mbar (350 mm head of water).
The filter element must therefore be exchanged in good time in accordance with the ser-
vice instructions.
Gas filter
The gas filter must strain out particles u 30 mm.
Commissioning and operation
73
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