Brano ATESO ALFA D2 - Combustion Air; D) Flue Gases

The service book IV / ALFA 7 03-9940.186
 The minimum distance between a vertical wall and the heater intake is 50 mm. The minimum distance
between a vertical wall and the heater outtake is 100 mm, while the opposite wall must be resistant to
temperatures of 150 °C.
BREEZE  55 mm
 The maximum length of the straight piping with 75 mm is 10 m ( intake + outtake)
 In the event that will be used on pipelines  75 mm, and it will be reduced to 55 mm it applies previous
paragraph, whereby 2 m pipes  75 mm mean reduction distribution with 55 mm by 1 m
 the maximum number of bends in the middle radius of 70 mm is 3 pieces and each bend leads to a
reduction of 1 m
 In the case of branching distribution into two branches (using a T-piece) at least one of the branches
must not exceed the maximum allowable length of distribution (this length is counted distribution before
branching or inlet or outlet etc.). This branch also must not be equipped with a shutoff flap. More
advantageous to use air ducts on the intake heater. The minimum distance from the vertical walls are
the same as for the distribution with 75mm
WIND  90mm
 The maximum length of the straight piping with 90 mm is 15 m ( intake + outtake)
 the maximum number of elbows for air dust is 5 pieces and each element shorts pipeline of 2,5 m
 A metal grid  90 mm of outlet means to shorten piping of 1,5 m
WIND  75mm
 The maximum length of the straight piping with 75 mm is 7 m ( intake + outtake)
 The maximum number of elbows is 4 pieces and each element shorts pipeline of o 1m
 The maximum number of T-units for air distribution is 4 pieces and each element shorts pipeline of 1 m
 An outlet grid  75 means to shorten piping of 5.5 m, outlet flap Š 120 after removing the sealing flap
do not short cut piping at all
Combustion air
It is necessary to install an intake silencer at the input of the combustion air. The combustion air must not
be sucked from the passenger’s or crew’s compartment. The intake port of the combustion air must not be
orientated in the direction of the driving motion and must be positioned so that it prevents clogging with dirt,
mud or snow. In case the suction port is situated in a place where its clogging with dirt might occur (e.g. in
the wheelhouse), it is necessary to use so-called intake silencer extension and situate the intake silencer
itself in a safe place. The original part - intake silencer extension – is 1 m long but it is possible to cut it
short in accordance with needs. The whole suction piping from the inlet to the heater must be laid with a
constantly rising gradient. If this condition cannot be met, it is necessary to make a 3mm hole in its lowest
point, so that the water or condensation could drain away.
The throttle valve of the combustion air on the heater is factory set and it is prohibited to manipulate it
anyhow. It is also prohibited to dismantle the sealed part of the heated air ventilator.
Flue gases
Flue gases must be reliably diverted to places where they cannot be part of the heating or combustion air.
The heater exhaust must always be fitted with a flexible tube that can be ordered separately. This tube can
be reduced to a minimum length of 0.5 m, respectively can be extended with pipeline with a minimum
clearance of 20 mm of 1 m. Its end must be equipped with a tailpipe. Exhaust pipes should be fitted with a
small sustained gradient towards the outlet flue gas. If this is not possible, must be drilled draining holes
around - 3 mm in the lowest places, so that water and condensate can freely drain off.
The flue gas outlet should be oriented so that is not directed against the driving direction and preventing to
its clogging with mud or snow. It is also important to ensure that the flue pipe did not exceed outline of the
vehicle and jeopardize the function of important parts of the vehicle (fuel lines, brake hydraulics etc.). It is
not appropriate to attach the exhaust pipe to the plastic parts of an automobile; the exhaust pipe
temperature can reach 200 ° C. If the end of the exhaust is less than 50cm above ground level, make sure
that the end of the exhaust not be oriented perpendicular to the road, and thus prevent flue outlet towards
incendiary substance (dry grass, straw, sawdust, etc.). Instruct the user in this fact.