Metering Pump; Installation Location - Butler HL 90 Notice De Montage

HL90 EA_de_en_fr.book Seite 38 Freitag, 8. Oktober 2004 12:34 12
Fuel supply
6.2. Fuel lines
Only steel, copper and plastic lines of plasticised, light and temperature-
stabilized PA 11 or PA 12 (e.g. Mecanyl RWTL) pursuant to DIN 73378
may be used for the fuel lines.
Since the lines normally cannot be routed with a constant rising gradient,
the internal diameter must not be allowed to exceed a certain size. Air
or gas bubbles will accumulate in lines with an internal diameter of more
than 4 mm and these will cause malfunctions if the lines sag or are
routed downwards. The diameters specified will ensure that bubbles do
not form.
The lines should not be routed downwards from the metering pump to
the heater.
Unsupported fuel lines must be secured to prevent them sagging. They
must be installed in such a way that they cannot be damaged by flying
road chippings and high temperatures (exhaust line).
Connecting two pipes with a hose
The correct procedure for connecting fuel lines with hosing is shown in
Figure 8.
Ensure that there are no leaks!
6.3.

Metering pump

The metering pump is a combined delivery, metering and shut-off
system and is subject to certain installation criteria (see Figure 8).
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Figure 8: Pipe / hose connection
6.3.1.

Installation location

Before installing the metering pump, ensure that the maximum pressure
occurring at the pickup point is no more than 0.2 bar.
It is advisable to install the metering pump in a cool place. The maximum
ambient temperature must not exceed +40 °C at any time during
operation.
The metering pump and fuel lines must not be installed within range of
the radiated heat from hot vehicle parts. A heat shield must be used if
necessary.
The pump should ideally be installed near the tank.
HL 90
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