REMKO GPM 15 - Manual (Page 23)

23
For example: Gas appliance type C:
The combustion system is tight
with respect to the environment in
which it is installed.
The combustion air is supplied
from the outside.
The units must only be operated
with suitable chimney pipes.
The components available as
accessories from the factory
comply with all requirements as
standard.
Condensation
If necessary, the chimney pipes
must be insulated to prevent the
formation of condensation in the
same.
The exhaust gas temperature at
minimum heat output corresponds
approximately to the condensation
temperature.
For pipe lengths above 5 m
indoors and 3 m outdoors,
condensation must be prevented
as follows:
■ By cladding the chimney pipes
■ By using condensate drains
from where the collected
condensation can be removed
from the chimney pipe.
Note:
Suitable condensate drains are
available as accessories.
These can be used for both
horizontal and vertical pipes.
Guide for selection
If the chimney end piece is not
connected directly to the unit,
but longer distances have to
be covered, it must be ensured
appropriate to the total length and
geometry of the chimney duct that
the end pieces and extensions as
well as the bends have the correct
diameter.
After determining the chimney
duct, the pressure loss for
the respective unit must be
determined.
The pressure loss varies for each
unit as the exhaust flow rate is
output-dependent.
Add up the determined pressure
losses of the individual chimney
components and ensure that the
total is not above the pressure
available for the type of unit to be
used.
If a combustion air supply pipe
exists, the pressure losses must
be added to those of the chimney
pipe.
If the total pressure losses are
above the available unit pressure,
chimney and fresh air pipes with a
larger diameter must be used.
In this case, calculation must be
repeated.
The maximum possible pipe
lengths between the unit and end
piece are shown in the tables.
When using chimney bends,
it is necessary to take the
corresponding pressure losses into
account.
NOTE
Exceeding the permissible
pressure losses in the pipes
will reduce the heat output
and affect the safe operation
of the units.
ATTENTION
Installation must only be car-
ried out by authorised specia-
lists.
Pressure loss examples:
A 90° bend with Ø 80
corresponds to a 1.7 m straight
pipe length
A 45° bend with Ø 80
corresponds to a 0.8 m straight
pipe length
A 90° bend with Ø 100
corresponds to a 1.9 m straight
pipe length
A 45° bend with Ø 100
corresponds to a 0.9 m straight
pipe length
Examples of chimney pipe and
combustion air pipe arrangements
are shown on the following pages.
The units are classified for the
following individual installation
B23/C13/C33/C43/C53/C63
variants:
The use of plastic chimney
pipes must be avoided.
ATTENTION