Mechanical system
34
13 Initial Start-Up
After the heater has been installed, the coolant circuit and the fuel supply
system must be carefully bled. Follow the instructions supplied by the vehi-
cle manufacturer for this purpose.
It is recommended that the heater circulation pump be put into operation
with the component test function of the Webasto Thermo Test PC Diagno-
sis to support bleeding.
Before the heater is operated for the first time, the coolant temperature
should be < 30°C, as the heater does not go into combustion operation at
high engine temperatures.
Carry out first-time operation with the Webasto Thermo Test PC Diagnosis.
Prime the heater with fuel using the Webasto Thermo Test:
Press the "Fuel prime" button and fill the lines until fuel is present at the
heater.
Example:
30 s filling time with 3,000 mm line length, metering pump frequency
5 Hz.
The CO
2
setting must be checked while operating the heater for the first
time (for value range, see chapter 15, "Technical Data").
Webasto recommends a setting of 10 vol. %.
All coolant and fuel connections must be checked for leaks and secure at-
tachment during the trial run of the heater. If the heater suffers a fault dur-
ing operation, the fault must be located and remedied.
14 Faults
To remedy a fault which has resulted in a fault lock-out, proceed according
to the workshop manual.
The safety precautions in the operating instructions
must be observed!
The operating instructions must be read through with-
out fail before starting the heater.
1317098B_EA_TT_ZEC_DE_EN_ZH.book Page 34 Tuesday, July 3, 2012 1:08 PM
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