When the boiler runs at low temperature,
it is possible to use standard flues provided
that:
- The flue is not be used by other boilers.
- The interior of the flue is protected to
prevent a direct contact with condensa-
tion from the boiler. The products of
combustion must be conveyed through a
flexible or rigid plastic pipe around 100
to 150 mm in diameter, and condensa-
tion must be siphoned off at the foot of
the pipe. The usable height of the water
trap must be at least 150 mm.
2.7
FORCED EXHAUST
TYPE B23P-B53P (fig. 9/a)
This type of exhaust pipe is installed using
the special kit, code 8089912/13. For kit
assembly instructions, refer to point 2.6.
Protect the intake with the optional acces-
sory, code 8089501.
The accessory is assembled by cutting a 50
mm long segment from an ordinary ø 80
extension and inserting it on the air intake,
on which the accessory is then fitted,
anchored to the pipe segment with the
screws provided (fig. 9/a).
Maximum flow resistance must be no
more than 15 mm H
O (ATTENTION: the
2
total length of each pipe should not
exceed 50 m, even if the total loss is
TABLE 3
Siting of terminal
A - below openable window
B - below ventilation opening
C - below eaves
D - below balcony (1)
E - from adjacent window
F - from adjacent ventilation opening
G - from horizontal or vertical soil or drain pipes (2)
H - from corner of building
I - from recess in building
L - from ground level or other treadable surface
M - between two terminals set vertically
N - between two terminals set horizontally
O - from a surface facing without openings or terminals 2000
P - as above but with openings and terminals
1) Terminals below a practicable balcony must be located in
such a way that the total path of the smoke from its outlet
point from the terminal to its outlet point from the external
perimeter of the balcony, including the height of possible rai-
lings, is not less than 2000 mm.
2) When siting terminals, where materials that may be subject
to the action of the combustion products are present in the
vicinity, e.g., eaves, gutters and downspouts painted or made
of plastic material, projecting timberwork, etc., distances of
not less than 1500 mm must be adopted, unless adequate
shielding is provided to guard these materials.
below the maximum applicable loss.)
As the maximum pipe length is determined
by adding up the flow resistance of the
various individual accessories installed,
refer to Table 1-1/a for calculation.
2.8
POSITIONING THE
OUTLET TERMINALS (fig. 10)
The outlet terminals for forced-draught
Appliances from 7 to 35 kW
(distances in mm)
600
600
300
300
400
600
300
300
300
2500
1500
1000
3000
cod. 8089501
appliances may be located in the external
perimeter walls of the building.
To provide some indications of possible solu-
tions, Table 3 gives the minimum distances
to be observed, with reference to the type
of building shown in fig. 10.
2.9
ELECTRICAL CONNECTION
The boiler is supplied with an electric cable.
Should this require replacement, it must be
ES
PT
ENG
Fig. 9/a
Fig. 10
93