Removing And Installing - Webasto Air Top 2000 STC Workshop Manual

8 Servicing
8.7

Removing and installing

ATTENTION
The heater must not be dismantled when installed.
8.7.1 Removing and installing heater
8.7.1.1 Removal
1. Disconnect vehicle battery.
2. Detach cover from upper casing as shown in 9.2.1.1.
3. Disconnect wiring harness connector from control unit.
4. Disconnect cable to fuel pump at the disconnection
point.
5. If necessary, disconnect the heating air hose(s).
6. Undo fuel inlet connection at heater.
7. Undo combustion air inlet and exhaust outlet
connections at heater.
8. Remove the four nuts and lock washers on the heater.
9. Remove heater and base seal at the exhaust outlet.
8.7.1.2 Installation
1. Place heater with a new base seal at the exhaust outlet
in the installation position and secure with 4 nuts and
lock washers (only use genuine Webasto nuts).
2. Tighten nuts to 6 +1 Nm.
3. Secure fuel inlet connection at heater.
4. Secure combustion air inlet and exhaust outlet
connections at heater.
5. Connect fuel pump cable to fuel pump wiring harness.
6. Connect wiring harness connector to socket X6 at the
control unit.
7. Reattach and lock cover.
8. If necessary, connect and secure heating air hose(s).
9. Connect vehicle battery.
10. Bleed the fuel supply system (see 8.8).
809
8.8 Commissioning
Carefully bleed the fuel supply system after installing the
heater.
Due to the low fuel consumption, it is necessary to switch on
the heater several times to fill the fuel line.
Trial run the heater to check all connections for leaks and to
make sure they are secure. If the heater encounters a fault
during operation, perform the troubleshooting procedure to
locate the malfunction.
Air Top 2000 STC
NOTE