Technical data

Thermo 90 S / Thermo 90 ST Fuel supply
45
NOTE:
Cut Mecanyl lines without burr and do not crush them. Do not cut them
with side-cutting pliers.
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 in Figures 3 and 7 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
chippings and high temperatures (exhaust line).
6.3.1. Connecting two pipes with a hose
The correct procedure for connecting fuel lines with hosing is illustrated
in Fig. 8.
NOTE:
Ensure that there are no leaks.
6.4. Metering pump with damper
The metering pump is a combined delivery, metering and shutoff system
and is subject to specific installation criteria (see Figs. 3, 9 and 10).
6.4.1. Installation location
Before installing the metering pump, ensure that the maximum pressure
occurring at the pickup point is less than 0.2 bar.
It is advisable to install the metering pump in a cool place. The maximum
ambient temperature must not exceed + 20 °C for petrol and + 40 °C for
diesel 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.
Fig. 8: Pipe / hose connection
Fig. 9: Metering pump DP2
Installation position and attachment
Clip
Bubble
Correct
Wrong
Bubble
12 V and 24 V – petrol and diesel