Thermo Pro 90 8Servicing work
802
8.5.2 Installation
1 Position heater in installation position and fasten with 3
screws and washers.
2 Mount fuel line and secure with hose clamp.
3 Mount coolant hoses and tighten hose clamps with
8Nm.
4 Restore all electrical connections.
The 12-pin vehicle specific wiring harness connector and
the 2-pin metering pump connector must audibly
engage.
5 Connect combustion air pipe and exhaust pipe.
6 Connect vehicle battery.
7 Bleed coolant circuit.
8 Bleed vehicle fuel system if necessary.
IMPORTANT
A polarity reversal of the power supply can result in damage
to the control unit. The correct polarity of the connection
wires must be ensured. A direct connection to a power
supply without an intermediate fuse is not permissible.
8.6 Recommissioning
After the heater has been installed, the coolant circuit and
the fuel supply system must be carefully bled. The
specifications of the vehicle manufacturer must be observed
when doing so. All coolant and fuel connections must be
checked for leaks and secure attachment during the test
run. Should a fault occur in the heater during operation,
then troubleshooting must be carried out (see Section 5).
To support bleeding of the coolant circuit, the circulation
pump must be put into operation via the Component test
function of the Webasto Thermo Test PC Diagnosis.
IMPORTANT
Before the heater is commissioned, the coolant temperature
must be < 40°C, as otherwise the heater may not go into
combustion operation. The heater must be put into
operation with the Webasto Thermo Test PC Diagnosis.
With the fuel line completely drained, the line must be filled
with the Webasto Thermo Test PC Diagnosis: Press the "Fuel
prime" button and prime line with fuel until fuel is present
at the heater.
All coolant and fuel connections must be checked for leaks
and secure attachment during a test run of the heater.
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