ALPA 31 BS 60
21
EN
cod. 3541B530 - 01/2012 (Rev. 00)
Baffles
Boiler operation requires fitting the baffles (supplied with the unit) according to the indi-
cations given in the following tables.
Before fitting the fume exhaust pipe, check the presence of the correct baffle (if used)
and that it is properly positioned. The boilers are fitted standard with the smallest diam-
eter baffle. To change the baffle, proceed as indicated in fig. 19.
fig. 19 - Baffle replacement (A = With boiler not installed / B = With boiler and flue
pipes already installed)
Connection with coaxial pipes
fig. 20 - Examples of connection with coaxial pipes (
= Air /
= Fumes)
For coaxial connection, fit the Ø60 pipe section supplied (detail
1
fig. 21) on the unit
fume outlet and install the starting coaxial bend (detail
A
fig. 21). Adjust the bend in the
required direction (detail
B
and
C
fig. 21) and tighten the fixing screw of the flange
“4“
.
The boiler casing has special precuts for the flue pipe. Any horizontal sections of the
fume exhaust must be kept sloping slightly towards the outside, to prevent possible con-
densate from flowing back towards the unit.
fig. 21 - Starting accessory for coaxial ducts
Before carrying out installation, check the baffle to be used table 2 and that the maximum
permissible length is not exceeded, taking into account that every coaxial bend gives rise
to the reduction indicated in the table. For example, a Ø 60/100 duct comprising a 90°
bend + 1 horizontal metre has a total equivalent length of 2 metres.
Table. 2 - Baffles for coaxial ducts
Connection with separate pipes
fig. 22 - Examples of connection with separate pipes (
= Air /
= Fumes)
For connection of separate ducts, fit the Ø60 pipe section supplied (detail
1
fig. 23) on
the unit fume outlet and install the starting accessory (detail
A
fig. 23). Then install 90°
bends and Ø80 ducts (see detail
B
and
C
in fig. 23) using the special precuts on the cas-
ing to allow the ducts to come out.
fig. 23 - Starting accessory for separate ducts
Before proceeding with installation, check the baffle to be used and make sure the max-
imum permissible length has not been exceeded, by means of a simple calculation:
1.
Completely establish the layout of the system of split flues, including accessories
and outlet terminals.
2.
Consult the table 4 and identify the losses in m
eq
(equivalent metres) of every com-
ponent, according to the installation position.
3.
Check that the sum total of losses is less than or equal to the maximum permissible
length in table 3.
Table. 3 - Baffles for separate ducts
A
A
1
2
B
B
5
4
1
3
2
C
12
C
12
C
32
C
32
C
32
C
12
B
C
Ø100
Ø60
Ø100
Ø60
Ø60
4
A
1
Coaxial 60/100
Coaxial 80/125
Max. permissible length
4 m
6 m
Reduction factor 90° bend
1 m
0.5 m
Reduction factor 45° bend
0.5 m
0.25 m
Baffle to use
0 ÷ 2 m
Ø 45
0 ÷ 3 m
Ø 45
2 ÷ 5 m
no baffle
3 ÷ 6 m
no baffle
Separate ducts
Max. permissible length
45 m
eq
Baffle to use
0 - 10 m
eq
Ø45
10 - 30 m
eq
Ø47
30 - 40 m
eq
Ø50
40 - 45 m
eq
No baffle
C
52
C
32
C
52
B
22
C
12
B
C
Ø80
Ø80
Ø60
A
1
Fumi
Aria
Summary of Contents for ALPA 31 BS 60
Page 67: ......
