806
Thermo 230 / 231 / 300 / 301 / 350
8 Servicing
When installing a shut-off device in the return line a clearly
visible information label must be provided.
ATTENTION:
Operation with the return line shut off causes damage
to the fuel pump. Fuel may escape. Danger of fire.
Loose fuel lines must be secured in order to avoid
sagging.
The installation of an additional fuel pump is not allowed.
Fuel lines permissible dimensions:
•
inner diameter for suction and return line:
•
6 mm (other diameters upon request).
•
max. permissible length for each suction and return
line: 10 m
•
Max. permissible suction height: 2 m
•
Max. permissible priming pressure: 0.3 bar for suction
and return line.
8.6.2.2 Fuel Filter
A by Spheros supplied with or approved fuel filter is to be
installed. Installation position possibly vertical with hori-
zontal direction of flow.
To avoid operating malfunctions replace filter or filter cart-
ridge once a year or more often if fuel is contaminated.
8.6.3 Combustion Air Supply
Observe official regulations concerning the installa-
tion (see
Combustion air must under no circumstances be
extracted from rooms with persons.
ATTENTION:
The combustion air inlet must not point towards the
forward direction of motion.
It must be located so that no clogging by contamina-
tion, impact of snow, or intake of splash water is to be
expected.
The combustion air intake and exhaust outlet is to be
located so that no air pressure difference builds up in
any operating condition of the vehicle.
Permissible dimensions of combustion air intake line:
•
inner diameter: 55 mm
•
max. length: 5 m
•
max. bend: 270°
The combustion air inlet must be located so that no
exhaust fumes can enter.
NOTE:
If the combustion air intake line cannot be routed
upwards, a water drain hole Ø 4 mm is to be provided at
the lowest point.
If the heater is located near the fuel tank in a common
installation compartment, combustion air must be taken
in from and the exhaust routed to the exterior. The feed-
throughs must be sealed against splash water.
If the heater is located in a closed installation box, a vent
port is required:
Thermo 230, 231, 300
and
301
30 cm
2
Thermo 350
35 cm
2
If the temperature in the installation box exceeds the
permitted ambient temperature of the heater (see
Technical Data), the vent port must be enlarged consul-
ting Spheros.
Information label
Danger to life and health!
Warning!
Summary of Contents for spheros thermo 230
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