Initial Operation
After the heater has been installed, the water circuit and
the fuel supply system are to be thoroughly bled. In so
doing the vehicle manufacturer’s instructions are to be ad-
hered to.
The fuel intermediate reservoir is to be filled by allowing
the engine to run for at least 2 minutes.
Perform a test run of the heater thereby checking all water
and fuel connections for leakage and secure attachment.
Should the heater fail during operation troubleshooting is
to be carried out.
Malfunctions
Shut-Down Due to Malfunctions of the Heater
If no flame forms fuel is delivered for max. 170 seconds.
If the flame goes out during operation fuel is delivered for
max. 85 seconds.
In the event of overheating (tripping of safety thermostat),
fuel supply is immediately stopped.
In all cases (except of combustion air fan defects) an after-
run period of 120 seconds will follow if the system is shut
down on account of malfunctions.
CAUTION:
No indication occurs in the case of overheating.
Shut-Down Due to Undervoltage or Overvoltage
In the case of an undervoltage of 9,8
±
0.3 V (measured at
cable harness input) occurring over a period of 20 second-
s, the unit will be shut down and an after-run period of 120
seconds will follow.
In the case of an overvoltage of 15,5 + 0.5 V
(measured at the heater) occurring over a period of
more than 6 seconds, the unit will also be shut down
and an after-run period follows.
Interlock deactivation of the heater after a fault lock-
out situation
Fault lock-out deactivation is to be performed in accord-
ance with the operating instructions.
Thermo Top
26
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