Joannes ALPA 31 BS 60 Instrucciones De Uso, Instalación Y Mantenimiento página 21

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.
A A
B B
1
2
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 (
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 Afig. 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.
A
Ø60
Ø100
1
4
Ø60
fig. 21 - Starting accessory for coaxial ducts
21
EN
1
2
3
= Air /
B
C
cod. 3541B530 - 01/2012 (Rev. 00)
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
Max. permissible length
Reduction factor 90° bend
Reduction factor 45° bend
Baffle to use
Connection with separate pipes
C
52
5 fig. 22 - Examples of connection with separate pipes (
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-
4
ing to allow the ducts to come out.
Ø80
1
Ø60
Fumi
= Fumes)
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
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
Max. permissible length
Baffle to use
ALPA 31 BS 60
Coaxial 60/100
4 m
1 m
0.5 m
0 ÷ 2 m Ø 45 0 ÷ 3 m
2 ÷ 5 m no baffle 3 ÷ 6 m
Ø80
A
B
Aria
C
(equivalent metres) of every com-
eq
Separate ducts
45 m
eq
0 - 10 m
eq
10 - 30 m
eq
30 - 40 m
eq
40 - 45 m
eq
Coaxial 80/125
6 m
0.5 m
0.25 m
Ø 45
no baffle
B C
22 12
= Air / = Fumes)
Ø45
Ø47
Ø50
No baffle