Ferroli Optimax 25 C Instructions For Installation, Use And Maintenance Manual page 17

Optimax 25 C
Connection with 80 mm pipe system
The unit can be connected to a system of separate air/flue
pipes for a wall or rooftop outlet as shown fig 11 - 12 .
Numerous accessories are available on request to meet
the various installation requirements. The components
used most frequently are stated in tables 4 - 5. Please
refer to the flue manual or the price list for additional
components.
To check you do not exceed the maximum permissible
flue length, it is necessary to make a simple calculation
before installation:
1. For each component, tables 4 - 5 provide an "equiva-
lent loss in linear metres", depending on the position
of installation of the component (with air intake or flue
extraction, vertical or horizontal).
The loss is called "equivalent length" since it is compared
to the loss of one metre of flue (defined as equal to 1).
For example, a bend at 90° of Ø80 in flue extraction has
an equivalent loss of 2.5 linear metres, i.e. it has a loss
equal to that of 2.5 linear metres of flue length.
2. After completely defining the layout of the system of split
flues, add up the losses in equivalent metres, depending
on the installation position, of all the components and
accessories in the system.
3. Check that the total calculated loss is less than or equal
to 75 equivalent metres, i.e. the maximum permissible
for this model of boiler.
For complete flue options please contact ferroli or
check our comprehensive flue manual.
Table 3
Ref. Description
Vertical air pipe Ø80
2 23
Vertical flue pipe Ø80
4 23
80 Ø vertical flue Kit
5 1
fig. 11
Equivalent
loss
23,0 m
36,8 m
12,0 m
Total 71,8 m
Ø80
Ø80
FUMES
AIR
Remove
the closing
cap
KWMR54A
95 120 120 65
80 84 80
1KWMA84U
5
1KWMA82U
1KWMA83W
4 2
1KWMR54A
fig. 12
17