Volvo D11 series, Installation Manual

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Exhaust system
25
Condensation water collector
The exhaust gases from a combustion engine always
include water vapour. This water vapour can con-
dense and form water, which in the worst cases, can
run into the engine when it is switched off.
Rain or condensed water that enters into the engine
can cause severe damage. Long exhaust lines should
therefore be fitted with a water drain (yard supply),
which should be located as close to the engine as
possible.
When the exhaust line is inclined downwards towards
the engine, a condensation water collector (position 2
and 3) must always be fitted. It must be located at the
lowest pont of the final installation.
The condensation water collector must be fitted with
a cock or drain plug at the bottom.
. Exhaust elbow
2. Condensation water collector for D5/D7/D9/D2
2
Insulated exhaust systems
Due to the high temperatures that arise in a dry ex-
haust pipe (400–500°C) it is sometimes necessary
to insulate it. Thereby the temperature in the engine
room can be kept low and personal injuries can be
avoided. The insulation also helps to keep the noise
level low.
Insulation of long lines will affect the exhaust back-
pressure and therefore the exhaust pipe diameter
must be increased.
Exhaust outlet position
The outlet of the exhaust pipe must be designed so
that rain water cannot enter the exhaust system. Fit
an elbow, hood or self-closing cover to the end. The
exhaust outlet must be in such a position that there
is no possibility of hot gas entering any air inlet open-
ing.
Example: Fitting of condensation water
collector for D6.