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Exhaust gas
10
Exhaust System
10.1. Exhaust pipe
The exhaust pipe (inside diameter 22 mm) can be routed with several bends
(270° altogether, minimum bending radius 50 mm).
The total line length must be between 500 and 1000 mm.
10.2. Exhaust silencer
It is not permissible to operate the Thermo Top Z/E/C heater without an ex-
haust silencer.
The exhaust silencer must not be installed near the intake opening for the
combustion air.
The exhaust silencer must be installed at least 200 mm from the heater.
Fig. 16 shows the exhaust silencer.
10.3. Recommendations for installation
The exhaust silencer and the exhaust pipe may not be fastened to
temperature-sensitive vehicle parts (e.g. brake line, electr. lines, vehicle
control units, headlights, underbody protection, plastic parts, etc.) and
there must be a sufficient distance of at least 20 mm from them.
Only approved Webasto spacer brackets may be used with this application.
The exhaust pipes are sufficiently fixed in place to ensure the minimum dis-
tances even during driving. Lines approved by Webasto must be used as ex-
haust pipes. It is recommended that the exhaust application be installed
splash-water protected.
30
Collections of condensed water in the exhaust pipe must be
drained off directly. If necessary, a condensed-water drain hole
may be drilled at the lowest point.
Condensed-water drain holes may not blow onto temperature-sensitive ve-
hicle parts.
The exhaust outlet must be located so as to prevent emissions from enter-
ing the vehicle through ventilators, heated air inlets or opening windows.
(Requirement from ECE R122, Point 5.3.4.1.).
The exhaust outlet must be unobstructed. It must not be directed at vehicle
parts. The exhaust outlet may not be located within the range of throw of
the wheels.
Watch the maximum steering angle of the front wheels. It must be ensured
that the exhaust outlet is not clogged and cannot be damaged under any
operating conditions.
The opening of the exhaust pipe must not point in the direction of travel.
Point the direction of outflow vertically downward or a maximum of 20°
opposite the direction of travel.
After passing through the underbody cover, the exhaust pipe must be ex-
tended by another 10 mm.
Fig. 15: Exhaust outlet
Legend:
39) Engine under tray
40) Exhaust outlet
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