Installation and Commissioning
54
Carefully read these Operating Instructions before starting any work!
This is especially valid for the chapter on General Safety Instructions
and the safety instructions in each of the chapters.
6.11 Commissioning
New or reconditioned engines must not be operated during the first operating hours at loads higher than 3/4
power.
After this time period the engine can be slowly brought up to full power.
NOTE
The liability for material defects no longer applies if non-approved fuels, lubricants and coo
lants are used
Liability of material defects is terminated if non-approved fluids and lubricants are used.
For this reason:
S
Only use approved fluids and lubricants (see “Fuels, Lubricants and Coolants..." publication).
S
The requirements on the quality of gas are specified in “MAN data sheet - Minimum requirement on
the quality of gas for MAN gas engines".
6.11.1 Gas system
User tip
The gas supply line is not included in MAN's scope of delivery. Commissioning, operation, monitoring of
operating conditions, and maintenance of the gas system are all to be performed as described in the
manufacturer's instructions.
Setting for commissioning
For commissioning the engine is to be set for the use of a suitable gas/air mixture. Any deviations from this
will negatively influence the output power, the engine efficiency and the exhaust emissions.
The requirements on the quality of gas are specified in “MAN data sheet - Minimum requirement on the
quality of gas for MAN gas engines".
The operating pressure of the natural gas in the gas line must be at least 20 mbar.
The gas pressure should be steady within this range.
In order to obtain a correct gas/air mixture, the intake air in the engine compartment must be at a tempera
ture of between 10
_
C and 30
_
C.
The gas must not contain any condensation when it enters the gas mixer, see “MAN data sheet - Minimum
requirement on the quality of gas for MAN gas engines".
Faults
We urgently recommend that you have faults rectified only at an authorised specialist workshop.
Air filter
The maximum pressure differential up and downstream of the filter may not exceed the following:
New
w
10 hPA
Dirty
x
30 hPA
.
The filter element must therefore be changed as stated in the maintenance instructions.
Gas filter
The gas filter must filter grain size
x
6
m
m.
