Lacunza INCA100, Instruction Book

Page: 11 / 33

INSTRUCTIONS FOR THE INSTALLER 10
2.
2.3.8. Piping air to the firebox
On this model, it is possible to pipe air
to the appliance for combustion straight
from outdoors. We recommend that, if
possible, air be drawn from outdoors for
combustion via a non-closable pipe with a
diameter of 120mm leading to the nozzle
on the bottom-front of the appliance. This
is the best option because it means that
draughts are not created in and oxygen is
not consumed from the room in which the
appliance is fitted. A further advantage is
that there is no danger of downdraught
which may hinder the correct updraught of
the appliance when an extractor or
mechanical ventilation appliance is used in
the same room as the central-heating
appliance or in another one alongside it.
If this is not possible, ensure that the
appliance receives air for combustion via
the relevant grille at the bottom of the
hood (in addition to the hood ventilation
grilles).
2.3.8.1. Combustion-air intake and hot-air
output installation options
Different installation systems need to
be borne in mind depending on the source
of combustion air (air from outdoors or
from inside the room in which the
appliance is fitted) and the hot-air output
system (air output by natural convection or
by forced convection involving a fan) to
ensure that ITACA-INCA appliances work
properly. There now follows a description
and image of each of these options:
Key to combustion-air intake and hot-air
output installation option diagrams:
1 Hot-air output grille
2 Combustion-air intake grille
3 piping
4 Combustion-air intake nozzle
5 Combustion-air intake from outdoors
OPTION A: Combustion-air intake from
inside the room and hot-air output by
natural convection (without fan).
With this option, it is not necessary to
lead the hot air along piping to the hot-air
output grilles, as shown in the image, or
from the combustion-air intake grille to the
combustion-air
nozzle that feeds
combustion air to the firebox.
Figure No.7 - Image showing Option A
OPTION B: Combustion-air intake from
inside the room and hot-air output by
forced convection (with fan).
With this option, the hot air can be led
along piping from the hot-air output
nozzles on the appliance to the hot-air
output grilles on the casing or to other
rooms. The air flow required at any given
time can also be regulated via the
potentiometer on the fan. Up to 4 outputs
can be fitted (the nozzles not to be used
should be capped). In such cases, the
combustion-air intake must be led via
piping from the grille on the outside of the
casing to the combustion-air intake nozzle
so that it does not interfere with the air
drawn in by the fan.