Fuel supply
Thermo H
53
8.1.1.
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 Valeo.
8.2.
Fuel Filter
A fuel filter supplied or approved by Valeo must be used (consider the
flow direction). To avoid malfunctions the filter or filter insert is to be re-
placed annually before the cold weather season starts. Optionally a
heated filter can be used.
If temperature limits of fuels have been reached, heated fuel filters are
to be used. However, it is recommended to use them beforehand.
8.3.
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 (at the heater).
For different fuel-side applications a separate approval by Valeo is requi-
red.
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.
Summary of Contents for Thermo H
Page 85: ...memos ...
