Webasto Thermo 230 Instructions De Montage page 58

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Exhaust pipe Thermo 230/231/300/301/350
9 Exhaust pipe
The opening of the exhaust pipe must not point towards the front of the
vehicle.
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 heater using a clamping
collar, for example. See the statutory regulations for other requirements.
Maximum dimensions of the exhaust pipe:
– Internal diameter: 70 mm
– Maximum line length:
5 m without the combustion air intake extension
– Total length of air intake line and exhaust pipe max. 5m
– Maximum bend: 270°
NOTE:
If the exhaust line is installed near heat-sensitive parts, it must be
insulated.
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