Operability Of The Heater Depending On The Negative Pressure In The Fuel System; Fuel Filter - Valeo Thermo S 160 Einbauanweisung

Fuel Supply
Then close screw plug, torque to 16 +/-1 Nm.
NOTE:
The fuel pump must not be used for bleeding puposes!
For further information on bleeding, refer to the Workshop Manual.
ATTENTION:
The operation with a closed return line will cause damage to the
fuel pump, fuel can leak out - fire hazard!
Fuel lines and filters must be protected against excessive heat.
A dry-run of the fuel pump must be prevented.
Unsupported fuel lines must be secured to prevent them from sag-
ging.
The installation of an additional fuel pump is permissible only in
consultation with Spheros.
For legal provisions refer to Chapter 1.
7.1.1. Permissible dimensions of the fuel lines
– Inside diameter for suction and return lines: 6 mm (other diameters
on request).
– Max. permissible length of each suction and return line: 15 m
– Max. permissible suction height: 2 m
– Max. permissible admission pressure: 0.3 bar
Deviations are to be approved by Spheros.
7.2.

Fuel Filter

A fuel filter supplied or approved by SPHEROS must be used (consider
the flow direction). To avoid malfunctions the filter or filter insert is to be
replaced annually before the cold weather season starts. Optionally a
heated filter can be used.
48
Thermo S 160/230/300/350/400
7.3. Operability of the heater depending on the negative pressure
in the fuel system
The preferred range designed for the fuel supply system goes up to
max. 350 mbar (fuel inlet on heater).
For different fuel-side applications a separate approval by Spheros is
required.
ATTENTION:
With increasing service life, the back pressure in the fuel supply
may be increased due to deposits (the filter clogs) and the heater
is more susceptible for malfunctions.