Eberspracher Airtronic D2 Installation Manual - The Fuel System
the fuel system
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Fuel supply
Fuel quality for petrol heaters
Petrol heaters are not permitted to be fitted into marine
craft.
Fuel quality for diesel heaters
The heater runs smoothly on standard commercial
quality diesel in accordance with DIN EN 590, which you
use to run your vehicle engine.
Fuel for special cases
In special cases (above 0°C), the heater can also run on
fuel oil EL or paraffin.
Fuel for low temperatures
Refineries and fuel service stations automatically adjust
the fuel to normal winter temperatures (winter diesel).
This means that difficulties are only to be expected
for extreme drops in temperature, as also apply to the
vehicle engine. Please also refer to the vehicle manual.
If the heater is run from a separate tank, please comply
with the following rules:
For temperatures above 0°C, any kind of diesel fuel as
per DIN EN 590 can be used.
If no special diesel fuel is available for low temperatures,
then paraffin or petrol should be mixed with the fuel
according to the following table:
temperature
Winter diesel Addition
0°C to -25°C
100%
–––
-25°C to -40°C
50%*
50% paraffin or
petrol
* or 100% special cold diesel fuel (Arctic diesel)
Please Note!
• Mixtures with used oil are not allowed.
• After refuelling with winter or cold diesel or the listed
blends, the fuel pipes and the dosing pump must be
filled with the new fuel by letting the heater run for
15 minutes.
Operation with biodiesel (PME)
AIRtRONIC D2
The heater is not certified for operation with biodiesel.
Biodiesel can be added to the fuel to up to 10%.
AIRtRONIC M D4
The heater is certified for operation with biodiesel as per
DIN V 51606 in a free-flowing state up to -8°C.
Condition
Installation horizontally in normal position, with the
exhaust connection downwards.
AIRtRONIC L D5
The heater is not approved for running on biodiesel
according to DIN V 51606.
Please Note!
• When using 100% biodiesel, the heater should be
operated twice a year with diesel fuel (in the middle
and at the end of a heating period) to burn off any
possible PME deposits.
To do so, let the vehicle tank run almost empty and fill
with diesel fuel without adding any biodiesel.
While running on this tank filling, switch the heater
on 2 to 3 times for 30 minutes at a time at the highest
temperature setting.
• When operating with diesel/biodiesel mixtures of up
to 50% biodiesel, intermediate operation with pure
diesel fuel is not necessary.
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