Technical data

NOTE:
The fitting must be made of sheet steel!
Fuel Lines
Only steel, copper and plastic pipes made of plasticized,
light-resistant and temperature-stabilized PA 11 or PA 12
(e.g. Mecanyl RWTL) in accordance with DIN 73378 may
be used as fuel lines. As in the majority of cases it is not
possible to route the lines in a continuous upward pitch,
the inside diameter must not exceed a given dimension. If
the inside diameter is equal to or larger than 4 mm, air or
gas bubbles accumulate which result in malfunctions if the
lines sag or are routed in a downward pitch. When the
diameters shown in Fig. 10 are used, you can be sure that
no unwanted bubbles will be formed.
The lines leading from the metering pump to the heater
should not be routed in a downward pitch.
To prevent the fuel lines from sagging, freely suspended
lines must be secured. Mounting should be performed in
such a manner that the lines are protected against flying
stones and thermal influence (exhaust pipe).
To prevent the fuel lines from slipping off they are to be se-
cured at the joints by means of hose clamps.
Connecting Two Pipes Using a Hose
The proper connection of fuel lines using a hose is shown
in Fig. 15.
Check for leakage!
Metering Pump
The metering pump is a combined delivery/metering and
shutoff system and is subject to certain installation criteria
(see Figs. 10, 16 and 17).
fuel extracting
device
tank fitting
sealing ring
Fig. 14: Fuel Extraction From the Plastic Tank
(Extraction Via Tank Fitting)
correct
incorrect
clamp
bubble
bubble
Fig. 15: Pipe/Hose Connection
AT 2000 S-B. 12-volt - Petrol
preferably 15°-90°
Fig. 16: Metering Pump DP 2
Installation Position and Mounting
AT 2000 S-D. 12-volt and 24-volt versions - Diesel
Fig. 17: Metering Pump DP 30
Installation Position and Mounting
Air Top 2000 S
10