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Optimax 25 OV
Connection with 80 mm pipe system
The unit can be connected to a system of sepa-
rate air/fume ducts for a wall or rooftop outlet
as shown on the drawings 11 - 12 alongside.
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 fl ue
manual or the price list for additional compo-
nents.
To check you do not exceed the maximum per-
missible duct length, it is necessary to make a
simple calculation before installation:
1. For each component, tables 4 - 5 provide
an "equivalent load loss in linear metres",
depending on the position of installation
of the component (with air suction or fl ue
extraction, vertical or horizontal).
The loss is called "equivalent in linear metres"
since it is compared to the loss of one metre
of duct in air suction (defi ned as equal to 1).
For example, a bend at 90° of Ø80 in fl ue
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 duct in air suction.
2. After completely defi ning the layout of the
two pipe fl ue system, add up the losses in
equivalent metres, depending on the instal-
lation 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.
If the chosen fl ue system exceeds the
maximum permissible limit, it is recom-
mended to use ducts with a larger dia-
meter for some sections.
Table 3
Ref.
Description
1
21
Vertical flue pipe Ø80
2
25
Vertical air pipe Ø80
3
1
Vertical outlet terminal
4
2
Kit (1KWMR54A)
Remove
the closing
cap
Equivalent
loss
33,6 m
25,0 m
12,0 m
0,6 m
Total
71,2 m
Ø80
Ø80
FUMES
AIR
KWMR54A
95
120
185
80
84
3
2
1
4
1KWMR54A
fi g. 11
fi g. 12
19
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