Piazzetta P960 Instructions For Installation, Use And Maintenance Manual page 22

Solution 4 - Fig. 33:
Extension of the previous solution, with the stove installed in the room
to be heated and the air flow ducted to the front and the rear, but using
a second Y-element to double the ducting at the rear as shown.
Maximum total length of the hoses 50' / (15 m). (Fig. 33).
a
For the example shown in fig. 33, for efficient ducting and to
avoid overheating, it is necessary to use non-closable outlet
vents as shown. During operation the outlet vent closest to the
Y-element must be partially open but never closed to avoid
overheating.
Wall and floor ducting - Fig. 34 / 37
For efficient ducted heat distribution:
- lag the hose with a 0.79" / (2 cm) thick insulation (e.g. mineral
fibre, ceramic fibre, rock fibre) to limit heat loss and to guarantee a
sufficiently warm air temperature;
- the insulation must have a specifi c weight equal to or more than 50
kg/m³ with working temperature limit of at least 482°F / (250°C).
Thermal conductivity λ (100°C) ≤ 0,050 W/mK.
- Material with code "AGI Q132" or "DIN 18895" is allowed for thermal
insulation;
- the maximum total length of the hose connected to the 2 fans must
not exceed 32.8' / (10 m).
a
If the insulating material is not enclosed under the floor or
within the walls, it must be fixed to the surface with suitable
fastenings at intervals of 11.8" / (30 cm).
A few examples of how the hose can be installed in walls or floors are
given to the side.
Safety ducting distance - Fig. 38
When hot air is to be ducted using a Ø 3" / (Ø 75 mm) flexible pipe to
adjoning rooms the minimum lenght shall not be under 4" / (10 cm)
which corrisponds to the minimum distance allowed from the wall to
rear of the stove.
If the flexible pipes go throught combustible walls and ceilings the
minimum required clearance is 1/2" / (1,3 cm).
Such space if made by air is allowed but it is reccomended to fill this
space with insulation (e.g. mineral fibre, ceramic fibre, rock fibre)
wrapped around the flexible pipe.
a
The flexible pipes are hot while in operation. If they aren't
insulated and pass through a room (typically in the space
behind the stove) keep children, clothing and furniture away.
Contact may cause skin burns.
Hot air outlet vent radiation area (mm) - Fig. 39
A safety area must be ensured around the hot air outlet vent within
which there must be no flammable objects (furniture, carpets, curtains,
etc.) or heat sensitive materials (wood, plastic, etc.).
The diagram to the side shows the measurements for this safety area,
which includes 23.6" / (600 mm) from the upper edge of the vent.
a
If the floor is flammable, the hot air outlet vents must be
located at least 7.9" / (200 mm) from the floor.
22
Fig. 33
Open vent
Fig. 34
Fig. 36
Fig. 38
COMBUSTIBLE
WALL
MINIMUM REQUIRED
FLEXIBLE
PIPE
Fig. 39
23.6" / (60 cm)
H07028100/DT2000970 – 01
20' / (6 m)
Partially
open vent
5' / (1.5 m)
Fig. 35
DT2030168-00
Fig. 37
DT2030170-00
CLEARANCE
1/2"
(13 mm)
1/2"
(13 mm)
MINIMUM LENGHT
HOT AIR OUTLET VENT
23.6" / (60 cm)
15' / (4.5 m)
DT2030220-01
DT2030169-00
DT2030171-00
4"
(102 mm)
DT2033375-00
DT2030172-00