Iveco Stralis MY 2016, Body Builder Instructions

Page: 243 / 254

NEW STRALIS MY2016
‒
GUIDELINES FOR BODYBUILDERS
STRALIS NP - CURSOR CNG-LNG
A.4 REQUIREMENTS
9
–
Printed 692.68.697
–
5 Ed. - Base 03/2019
●
For reasons of safety, both when outfitting and during maintenance, it is strictly prohibited to use the gas pipes as a support
for other pipes.
●
In some situations of limited space, it is permitted to secure some electric cables (using collars) to the gas pipes, provided they
serve only as a guide and not as a support.
●
During these operations, pay careful attention to ensure that the pipes are not damaged in the process and remain free of any
scratches, markings or deformation. Protect the pipes if necessary.
●
When a gas pipe passes through the chassis side member, make sure that the rubber bulkhead connector is not dislodged in
any way and is perfectly coaxial with the hole on the chassis.
▶
After any intervention on the high pressure section of the CNG system, a TEST must be carried
out to ensure there are no GAS LEAKS at 260 bar. The test can only be carried out at a Centre
specifically enabled for this task. A Test Certificate is issued following a positive result.
▶
Check if local Regulations and the competent Authorities allow vehicles running on CNG and
LNG to be parked in closed areas (for example, workshops) and that these areas are certified
and authorised.
Breather pipe
When the pressure inside the LNG tank exceeds the nominal calibration of the primary safety valve (16 bar), the system discharges
the amount of gas needed through the vertical pipe behind the cab to reduce the pressure and bring it to below 14.5 bars.
The LNG tank is designed to ensure pressure is kept below the pressure set for the primary safety valve for at least 5 days with a
full tank at standard operating pressure (approx. 9 bar), the vehicle stationary and ambient temperature of 20
±
5
°
C.
In the same conditions, if it is left to vent, a full tank will empty in approximately 6 weeks.
The time required by the tank before it begins to vent depends on the initial internal pressure (the lower, the better) and the per-
centage of gas in the tank (the higher, the better) . For example, if a vehicle is left stationary with 30% of the maximum capacity of
the tank, it will empty after just 3 days.
It is therefore recommended that the smallest possible amount of gas is left in the tank in the event of maintenance operations on
the LNG tanks or long periods of inactivity. This is to prevent the natural gas venting into the atmosphere.
Change in the chemical composition of the LNG
If the vehicle remains stationary for long periods (> 20 days), especially when the tanks are almost empty, the chemical composition
of the natural gas changes progressively and it may no longer meet the specifications required for proper engine operation. To
prevent damage, the vehicle must be driven slowly without a load (without a semi-trailer, trailer and / or load) to the nearest LNG
refuelling stations and refuelled before resuming normal service.
Indications for parts
a) Repainting the outfitted chassis
Note As well as the indications provided in Chapter 2.3 PROTECTION AGAINST RUST AND PAINTING (
➠
Page 10) and
especially page 13 of that Chapter, please note that it is also necessary to follow the indications provided by Regulation ECE R110
and any additional regulations of the individual country/market.
The following must be protected from paint: