Heater, Removal And Installation - Webasto Air Top Evo 40 Workshop Manual

Air Top Evo 40 / Air Top Evo 55
8.7 Removal and installation
IMPORTANT
When the heater is installed it must not be dismantled.

8.7.1 Heater, removal and installation

8.7.1.1 Removal
1. Disconnect vehicle battery.
2. Pull cover off top shell as described in Section 9.2.1.1.
3. Disconnect wiring harness plug from control unit.
4. Disconnect cable to fuel pump at disconnection point.
5. If necessary, disconnect connection of cold and the hot
air hose or hoses.
6. Disconnect connection for fuel inlet on heater.
7. Disconnect connections for combustion air inlet and
exhaust outlet on heater.
8. Remove four nuts and locking washers from the heater.
9. Remove heater and discard base seal.
8.7.1.2 Installation
1. Move heater into installation position with new base
seal and fasten with 4 nuts and lock washers (only use
genuine Webasto nuts).
2. Tighten the nuts to 6 +1 Nm.
3. Fasten connection for fuel inlet on heater.
4. Fasten connections for combustion air inlet and exhaust
outlet on heater.
5. Reconnect fuel pump cable.
6. Connect the wiring harness plug to socket X7 on the
control unit.
7. Fit the cover as described in Section 9.2.2.5 and secure it.
8. If necessary, fit cold and hot air hose or hoses and secure
them.
9. Connect the battery.
10. Bleed the fuel supply system.
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8.8 Start-up
After you have installed the heater, bleed the fuel supply sys-
tem carefully.
As a result of the low fuel consumption the heater must be
switched on several times to fill the fuel line.
During test operation of the heater, all connections must be
checked for leaks and firm seating. If the heater suffers a fault
during operation, troubleshooting must be located and rem-
edied.
Service Work
NOTE
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