Exhaust System - Webasto Thermo 90 ST B Installation Manual

Exhaust System

10. Exhaust System
The exhaust pipe (internal diameter 38 mm) can be installed with a length of 0.5 m to 5 m (1.6 ft to 16 ft) and several
bends totalling a maximum of 360° altogether. The minimum bending radius is 85 mm (3.35 inches).
The exhaust muffler is essential and must be installed near the heater.
The opening of the exhaust pipe must not point towards the front of the vehicle (see Figure 28).
The exhaust pipe opening must be located so that it cannot become clogged with snow and mud.
Rigid pipes of unalloyed or alloyed steel with a minimum wall thickness of 1.0 mm or flexible piping of alloyed steel
only must be used as exhaust line. The exhaust pipe is secured to the muffler using an approved muffler clamp. See
Figure 28 for details. See the statutory regulations for other requirements.
Figure 27: Exhaust muffler installation - enclosure kit only
A. Muffler
B. coupler (between heater and muffler)
C. "L" bracket
The exhaust muffler is essential and must be installed near the heater. The exhaust muffler is secured to the heater
using a coupler between the heater and muffler and a bracket fastened to the underside of the enclosure. See Figure
27 for details.
Webasto Product N.A., Inc.
Heater removed for
clarity of illustration
B
C
22
Thermo 90 ST
A A
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