26
6 Components
6.3 Exhaust and
Com}:>Ustion
Air System
6.3.1 Pressure Equalizer (Exhaust/Intake Duct)
Description:
The pressure equalizer
is
designed for
combustion air inlet
and
exhaust outlet
and
is
con-
nected
to
the
appropriate lines.
The pressure equalizer prevents the flame
in
the heater
from being "blown out".
It
prevents pressure differences
between combustion air inlet and exhaust outlet.
Note: The pressure equalizer is normally only required
for heaters with part load operation. For boats and
ships its installation
is
mandatory.
In
the area of the
outer skin
of
the
vessel
an
insulating plate made of
V2A steel
is
to be inserted.
Check: Remove dirt
on
and
in
the pressure equalizer.
Ensure that passage
is
unobstructed. Check hose con-
nections for security.
6.3.2 Exhaust Silencer
Check:
Check for unobstructed passage
and
check
CO2-content,
if
necessary.
In
the case
of
severely contaminated heat exchangers
or flexible exhaust pipes the exhaust silencer must
be
replaced.
Note:
On
boats and ships, insulation
of
the
exhaust
si-
lencer
is
only permitted using insulating tape (order
no.
428 132,
by
the meter, or 443 247, on
25
m-rolls). Insu-
lation must
be
applied
in
at least 3 layers.
6.3.3 Flexible Exhaust Pipe
Check:
Check for contamination, damage
and
restric-
tion
of
cross-sectional area (e.g. due to accumulated
condensation water. sharp bends). The maximum per-
missible pipe lengths specified in the Installation In-
structions are to
be
adhered to.
Note:
On
boats and ships, insulation
of
the exhaust
pipe is only permitted using insulating tape (order no.
428 132,
by
the meter, or 443 247, on 25 m-rolls). Insu-
lation must
be
applied
in
at
least 3 layers.
exhaust
intake pipe
condensate drain hole
6.3.4 Combustion Air Pipe
Check:
Check
for
unobstructed passage. The opening
must not point
in
upward direction
so
as to prevent the
ingress of water.
Note: The maximum permissible pipe lengths specified
in
the Installation Instructions are
to
be
adhered to.
The combustion air should
be
extracted from a dust-
free area, if possible.
)
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