2-32
CHASSIS MODIFICATIONS
D
AILY 4x4
Base - May 2007 Print 603.93.761
Modifications of the Engine Cooling System
Modifications ofthe Engine Cooling System
2.12 Heating/Air conditioning system modifications
2.12.1 Installation of a Supplementary Heating System
When the installation of a supplementary heating system is deemed necessary, it is advisable to use the types recommended
by IVECO.
For vehicles on which IVECO has not anticipated the use of suppleme ntary heater s, the installation should be carried out in com-
pliance with the supplier’s instructions (i.e. heater arrangeme nt, piping, electrical system etc.) and following the directions given
below.
All nat iona l r ule s and regul ati ons releva nt to the matter shoul d be ad he r e d to (i.e . inspe ctions , parti cula r ins tal la tion for d a nge ro us
cargo transpo r tat ion etc.). The supp le mentar y hea ti ng s yste m must not m ak e use of the equip ment that is sp e cif i c to the vehicle
which is subject to approval if the use is liable to impair or alter the perform ance of the equipment.
Furthermore:
- ensure correct operation of the vehicle components and equipment (i.e. cooling system);
- c heck the electrical system to ensure that the battery capacity and alternator output is sufficient for the higher current require-
ments (see point 2.16). Provide the new circuitry with a protection fuse;
- connect the intake of the newly added fuel system to the reservoir connected to the engine fuel return line. Direct feed from
the vehicle fuel tank is permitted only if this is independent from the engine fuel system and the n ew circuit is perfectly leakproof;
- trace pipe and cable paths, the location of brackets and hoses bearing in mind that the overall dimensions and heat affect the
various units on the chassis. Avoid runs and arrangements that could lead to hazards when the vehicle is running. Use shields
or armouring if necessary;
a) When installing a water h eater, original vehicle heating and engine cooling circ uits are in volved (see point 2.10), it is advisable
to follow the in structions listed below to ensure reliability of the heating sy stem and safe operation of the original system:
- special care must be taken when defining the connections between the supplementary equipment and the main one; refer
to IVECO, if necessary;
- determine a rational arrangement for piping, avoid neckings and siphonings;
- install proper venting valve (bleeding points) to ensure proper filling of th e system;
- ensure that the circuit may be fully drained by providing additional plugs if necessary;
- proper insulation should be used to prevent heat dissipation.
b) When air heaters are used and when the installation is to be made directly in the cab, make sure that the engine exhaust system
does not touch the added installation (to prevent combustion gas circulation inside the vehicle) and have the correct warm
air distribution by avoiding direct air flows;
- the c omplete installation should be designed to ensure good acc essibility for quick and easy servicing.
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