Webasto Product N.A., Inc.
8
www.techwebasto.com
Installation
Air Top Evo 3900/5500
4.4
To Install the Heater
The M6 nuts used to install the heater must be tightened with a torque of 6 Nm
±
1 Nm (4.4 lb.-ft
±
74 lb.-ft).
The installation dimensions and space requirement for service access are shown in the installation drawing (Figure 1).
The specified horizontal and axial angles must not be exceeded (Figure 2).
Figure 2. Recommended Installation Positions for AT 3900/5500 Heaters
A seal (Figure 4)
must
be fitted between the heater and the vehicle body. This seal must be replaced each time the
heater is installed. The support area for the heater foot must be flat. A special tools can be purchased from Webasto to
drill the holes and, if necessary, smooth the support area. The seal can compensate for unevenness of max. 1 mm.
The seal or foam gasket or both must be replaced each time the heater is removed and re-
installed.
Figure 3. Hole Pattern
Figure 4. Seal
Gasoline Heaters
Diesel Heaters
0 - 90°
0 - 90°
0 - 90°
0 - 90°
0 - 90°
0 - 30°
WARNING
Ø
7.5
Ø
7.5
Ø
7.5
Ø
26
Ø
26
18
12
44
55