9.1.2.2 Removal of External Temperature Sensor
(Air Top 2000 without Diagnosis)
General
The heater Air Top 2000 regulates the desired tempera-
ture the best when its temperature sensor is exposed to
the air temperature of the most probable surrounding in
use. This might not always be possible due to the instal-
lation conditions with the temperature sensor being inte-
grated in the heater. In such case the best temperature
control may be achieved by installation of an external
temperature sensor (Order No. 85049A) in the relevant
living area.
Procedure
1.
Remove control unit (see 8.7.2.1).
2.
Using a suitable tool (e.g. cutting pliers or similar)
remove temperature sensor from control unit.
3.
Select adequate installation location for external
temperature sensor.
NOTE
l
Temperature sensor should not directly be exposed
to heated air flow.
l
For installation of the sensor in the motorcar we
recommend to locate the sensor on the window
spar of the windshield or in the vicinity of the air
intake in the air flow for air circulation operation.
l
For installation of the sensor in the lorry we recom-
mend to locate the sensor on the window spar of
the windshield or on the underside of the roof con-
sole.
4.
Mount external temperature sensor and route cable to
heater.
5.
Install control unit.
Control unit
12 Volt type only
Remove
temperature
sensor
6.
Arrest leaf spring contacts in empty compartments of
connector X6 (contacts 4 and 6). Polarity is irrele-
vant.
7.
Connect connector X6 and fit cover.
8.
Perform test run and check control behaviour.
9.2
Disassembly and Assembly
9.2.1 Removal of Housing Components/Covers
9.2.1.1 Cover for Electrical Connection
Dependent on the type of installation the cable loom
exits the air heater either on the left or right.
The cover may be levered off using a blunt blade in the
areas marked X .
9.2.1.2 Covers for Heating Air Inlet and Outlet
Both covers (3 and 5, Fig. 901) may be removed by a
slight side lift and a slide to left or right out of the locked
position.
9.2.1.3 Upper Housing Shell
NOTE
The covers for the heating air inlet and outlet must be
removed.
By simultaneously exerting pressure on the catches of
the upper housing shell (2, Fig. 901) in the areas Y ,
the shell disengages an can be lifted off.
9.2.1.4 Lower Housing Shell
By simultaneously exerting a light pull to the lower hous-
ing shell (4, Fig. 901) in the areas Z , the catch is
released and the shell may be separated from the motor
housing.
1
3
5
7
2
4
6
8
External Temperature
Sensor
Connector X6
Cover
902
9 Repair
Air Top 2000