4.5.3
Dimensions of flue gas outlet pipe
Warning
The pipes connected to the flue gas adapter must satisfy the
following dimension requirements.
d
1
External dimensions of flue gas outlet pipe
Tab.11 Dimensions of pipe
d
1
(min-max)
250 mm
249 - 251 mm
350 mm
349 - 351 mm
4.5.4
Length of the flue and air supply pipes
The maximum length of the flue and air supply vary per appliance type.
Consult the relevant chapter for the correct lengths.
If a boiler is not compatible with a specific flue system or diameter, it is
indicated with "-" in the table.
When using bends, the maximum flue length (L) must be shortened
according to the reduction table.
Use approved flue reducers for adaptation to another diameter.
The boiler also supports other flue lengths and diameters than those
specified in the tables. Contact us for more information.
Room-ventilated system (B
23
, B
23P
)
With a room-ventilated system, only the flue is connected. The air supply
is not connected and will draw the combustion air directly from the
installation area.
L Length of the flue to roof terminal
Flue gas outlet connection
Tab.12 Maximum length (L)
Diameter
250 mm
Gas 320 Ace 285
Gas 320 Ace 355
Gas 320 Ace 430
Gas 320 Ace 500
Gas 320 Ace 575
Gas 320 Ace 650
50 m
(1) While maintaining maximum length, additional 5 times 90º or 10 times 45º
bends can be used (indicated for each boiler type and diameter).
Fig.11
Dimensions of open connection
AD-3001094-01
ød
1
Fig.12
Room-ventilated system Gas 320
Ace
AD-3001561-01
L =
4 Before installation
20
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