Product Manual

3.12 Combustion air system
Note
Instructions for the combustion air system
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The combustion air opening must remain free at all times.
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Lay the combustion air inlet so
– that exhaust gases cannot be drawn in as combustion air.
– that fuel fumes that may occur cannot be drawn into the fresh
air intake of the vehicle or heater.
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Do not direct the combustion air intake against the vehicle's air
stream.
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The combustion air inlet must not become clogged with dirt and
snow.
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Lay the combustion air system sloping slightly downwards. If
necessary, make a drain hole of approx. Ø 5 mm at the lowest
point to drain off condensation.
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If necessary, use fastening clips or cable ties to fix the flexible
combustion air hose to the vehicle in suitable places.
3.12.1 Mounting the combustion air system
A combustion air intake silencer with a flexible pipe (di 20mm),
760mm long, is included in the installation kit.
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Push the flexible pipe from the combustion air intake silencer onto
the combustion air connection socket of the heater and fix with a
screw clamp (tightening torque 3
+0.5
Nm), see Picture 18.
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If necessary, shorten the flexible pipe from the combustion air
intake silencer according to the installation conditions. Ensure a
clean cut edge. Small cut-offs could block the combustion air fan.
Note
Note and follow the regulations and safety instructions for this
chapter
from page 9.
max. 760 mm
max. 2 m
min. 200 mm
min. 200 mm
min. 150 mm
Picture 18
1 Heater
2 Combustion air intake silencer
3 Flexible exhaust pipe
4 Exhaust silencer
5 Exhaust pipe end with end sleeve
6 Spacer ring
24 25.2933.90.0001.0A EN | 06.2018
Technical Description | Hydronic S3 Economy