1.Arrangement of the heater
Parts of the structure and other components near the heater must be protected from excess heat exposure and possible contamination fromfuel or oil.The heater must not pose a fire hazard even when it overheats.
This requirement is deemed to be fulfilled when adequate clearance to al parts is observed during installation, sufficient ventilation is provided and fire-proof materials or heat plates are used.The heater must not be mounted in the passenger compartment of vehicles in class M2 and M3.But a heater in a hermetically sealed enclosure which otherwise complies with the conditions stated above may beused.The factory nameplate or duplicate must be affixedso that it can still be easily read when the heater is installed in the vehicle.Allappropriate precautions must be takenwhen arranging the heater to minimise the risk of injuries to persons or damage to other property.
The fuel intake connection must not be located in the passenger compartment and must be sealed with a properly closing lid to prevent any fuel leaks.In heaters for liquid fuel where the heater fuel is separate from the vehicle fuel, the type of fuel and intake connection must be clearly identified.A warning sign is to be fixed to the intake connection indicating that the heater must be switched off before refueling.
The exhaust outlet must be arranged so as to prevent any penetration of exhaust fumes into the vehicle interior through the ventilation system, warmair intakes or open windows.
4.Combustion air intake
The air for the heater combustion chamber mustnot be sucked in from the passenger compartment of the vehicle.The air intake must be arranged or protected in such a way that it cannot be blocked by other objects.
5.Heater air intake
The heater air supply must consist of fresh airor o circulated air and be sucked in from a clean area not contaminated by exhaust fumes of the drive machine, the combustion heater or any other source in the vehicle.Theintake pipe must be protected by a grid or other suitable means.
6.Hot air outlet
The hot air pipes within the vehicle must be arranged or protected in such a way that there is no risk of injury or damage if they are touched.-The air outlet must be arranged or protected in such a way that it cannot be blocked by any objects.
7. Fuel tanks
Fuel tanks for supplying the heater shall conform to the following regulations:
In the event of any leakage, the fuel shall drain to the ground without coming into contact with hot parts of the vehicle or the load;
fuel tanks containing petrol shall be equipped with an effective flame trap at the filler opening or with a closure enabling the opening to be kept hermetically sealed.
8.Exhaust system and exhaust pipe layout
The exhaust system as well as the exhaust pipes shalllaid out or protected to avoid any danger to the load through heating or ignition. Parts of the exhaust system situated directly below the fuel tank(diese)
shall have a clearance of at least 100 mm or be protected by a thermal shield.
9.Switching on the combustion heater
The combustion heater may ony be switched on manually. Automatic switching on via a programmable switch is not permitted.Combustion heater after-run After-running of the switched off combustion heater is pemitted. In the cases named in the FL vehicles"paragraph under letters b) and c) the supply of combustion air must be interupted by suitable meansafter a maximum after-run period of 40 seconds. Only combustion heaters whose heat exchangers are verifiably not damaged by the reduced after-run period of 40 seconds beyond their usual use period may be used.