Safety precautions for working on vehicles with auxiliary heater

Danger of fire and explosion from auxiliary/supplementary heater

In fire and explosion-endangered areas a spark or the high temperature of the auxiliary/supplementary heater can cause a fire or an explosion. Burn injuries are also possible.

• Switch the auxiliary/supplementary heater off in fire and explosion-endangered areas.

Danger of poisoning from exhaust fumes

Auxiliary/supplementary heaters produce poisonous exhaust fumes. Injuries to airways and poisoning are possible.

• In closed areas, only switch on the auxiliary/supplementary heated when it is exclusively connected to an exhaust extractor system.
• In closed areas without an exhaust extractor system, switch off the auxiliary/supplementary heater.

Danger of damage when starting the engine.

If the fuel system components (e.g. metering pump, fuel lines, fuel gauge sender) are removed or opened, there is a possibility of causing damage to the auxiliary/supplementary heater.

• Never attempt to start the engine when fuel system components are removed or opened.

Malfunctions caused by air in the fuel system

After working on the fuel tank or the fuel delivery pump the metering pump will draw air and supply it to the auxiliary/supplementary heater. The air in the fuel system may cause the auxiliary/supplementary heater to malfunction.

• Fill the fuel take-off pipe with fuel.

Risk of accidents and risk of injury due to activated timer of auxiliary heater

On vehicles with activated timer for the auxiliary heater, the auxiliary heater may be switched on unexpectedly. This poses a risk of poisoning from exhaust gases, a risk of burns caused by hot auxiliary heater components as well as a risk of fire and explosions caused by high temperatures.

• Deactivate timer for auxiliary heater.