Webasto Air Top 2000 D Service And Repair Manual page 41

Air Top 2000
8 Servicing
Hole Pattern
Fuel Tank Tap
Gasket
Tank Fitting Plate
Fig. 802 Webasto Fuel Tank Tap
* Use fuel tank tap only on metal fuel tanks
Fig. 804 Fuel Tapping from Plastic Tank
(tapping via fitting plate)
Plastic Tank
NOTE
The fitting plate must be made of sheet metal!
8.6.2.2 Fuel Lines
Fuel lines may only be steel, copper, or plastic lines
made of unhardened, light and temperature stabilised
PA 11 or PA 12 ( e.g. Mecanyl RWTL) according to DIN
73378. As in most cases a permanently rising fuel line
Gasket
routing cannot be ensured, the inner diameter must not
exceed a certain value. Starting from an inside diameter
of 4 mm, air or gas bubbles accumulate resulting in mal-
functions should the lines be descending or have sags.
The diameters specified in Fig. 801 ensure no disturbing
formation of bubbles.
A descending line routing from the dosing pump to the
heater should be avoided.
Fig. 803 Fuel Tapping from Plastic Tank
Loose fuel lines must be secured in order to avoid sagg-
(tapping via fuel drain plug)
ing. The installation must ensure protection against
stone impacts and undue temperatures (exhaust line).
The fuel line joints are to be secured against slipping
with hose clamps.
803