Iveco DAILY M.Y. 2012, Body Builder Instructions

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B-10
APPENDIX B - DAILY CNG AND CNG WITH RECOVERY MODE D
AILY
Base - 02/2012 Printed 603.95.241
Operations on the system
B.3.5 Emptying the gas system
!
Before performing significant operations (such as welding) or servicing the engine, the gas circuit must
be completely ventilated with air.
It is usually sufficient to partially empty the system (i.e. to empty the pipes and leaving the cylinders as are) but the entire system
(pipes and cylinders) may need to be emptied in some cases.
Decide which procedure is required on a case-by-case basis according to the severity and type of intervention to be performed.
If in doubt, choose the safest solution (complete emptying).
If the engine conditions so allow (e.g. no leakages), it is advisable to use up all the gas by running the engine.
Running the engine with system pressure under 20 bar does not ensure the correct fuel metering.
Below 20 bar, the engine must be run at idle speed only to prevent damage to the catalytic
converter. NOTE
Perform the emptying operations described below with the engine off and in the open-air. Maintain a spark-free area of at least
5 meters around the vehicle.