Webasto Air Top Evo 40 Installation Instructions Manual - 6 Combustion Air System
16
Air Top Evo 40 | Air Top Evo 55
6 Combustion air system
6.1 Open end of combustion air intake line
Installation position
Installation location requirements:
6.2 Combustion air intake line
Installing combustion air intake line
Fig. 15: Install open end of combustion air intake line 90° to direction of
travel
X
X
Install open end of combustion air intake line 90° to direction
of travel.
Fig. 16: Avoid dirt
X
X
Install the combustion air intake line such that the open end of
the line is protected from dirt.
The installation location must satisfy the following requirements:
X
X
The combustion air is taken from the outside.
X
X
The exhaust gasses or fuel vapours are not drawn in.
X
X
Cool air is drawn in.
X
X
The installation location is above the maximum permissible for-
ding level of the vehicle.
X
X
Use only Webasto-approved combustion air intake lines.
X
X
Maintain the following limits:
Parameter
Value
Max. length of combustion air intake
line with integrated silencer and wit-
hout exhaust silencer
5 m
Max. length of combustion air intake
line with integrated silencer and with
exhaust silencer
2 m
Max. length of combustion air intake
line with external silencer and without
exhaust silencer
5 m
Recommended min. length of combus-
tion air intake line with integrated si-
lencer
0.5 m
Min. length of combustion air intake
line with external silencer
The external combustion air intake silencer can
be connected directly to the heater. The com-
bustion air intake line serves as a connection pi-
ece.
Internal diameter
25 mm
Smallest bending radius
50 mm
Max. sum of all bends
270°
Fig. 17: Avoid syphon (risk of condensation accumulation)
X
X
Install combustion air intake line rising to the heater.
X
X
If combustion air intake line cannot be installed continually ri-
sing:
–
Make a condensation drain hole (Ø 4 mm) at the lowest
point of the syphon.
–
Make sure that no exhaust gasses are drawn in.
WARNING
Reduced oxygen levels due to incorrectly positi-
oned combustion air intake opening
Unconsciousness and risk of suffocation due to lack
of oxygen
X
X
Do not take combustion air from enclosed areas
used by people.
ATTENTION
Damage caused by confusing the exhaust line
with the combustion air intake line
Damage to fuel pump cable caused by sharp end of
pipe
X
X
Connect exhaust line only to the exhaust outlet
coupling.