Chimney Flue Connection - Baxi Sirius FS 90-105-130-160 Installation, Operation & Maintenance Manual

Connect the boiler to the flue using a pipe made of stainless steel or plastic material with an internal diameter
of 100 mm, capable of resisting normal mechanical stresses over time, as well as high temperatures
and the chemical effects of fuel gases and their condensates.
connector to the flue-gas thermostat before hooking up to the flue.
Whenever possible use a flue connection that can be disconnected for maintenance.
Important! horizontal flue sections must have a minimum slope of 3° towards the boiler.
Flue accessories made of plastic material
Figure 7a
In case exhaust and intake flues not supplied by
be certified for the type of use and must have a maximum pressure drop in according to the values reported in
the table.
To ensure the correct rated heat input to the maximum and minimum heat input, it is necessary to update the speed (rpm)
of the fan, it depends on the lenght of the pipes, in accordance with the installation of flue and air pipes as indicated in
the tables below. The factory-set value is referred to the minimum length of flue pipe (0÷10 m). To carry such updating,
changing the speed of the fan at the (rpm and pwm%) , refer to par. 13-14.
Max. length of flue duct (L) : 20 m
Each 90° bend reduces the duct max. length by : 1 m
Each 45° bend reduces the duct max. length by : 0.5 m
FS 90
FS 105
FS 130
FS 160
InstructIons pertaInInG to the InstaLLer

11. chiMney Flue connection

for cascade or single installations are available.
potterton coMMercIaL
FLue pressure taBLe avaILaBLe
∆P available
flue duct B23 Ø 100
110
150
170
280
Insert the flue-gas union and fasten the
Cascade solution
∆P available with
single non-return valve
Ø 110/110
110
110
-
-
21
(<120°C)
have been installed, these must
∆P available with
double non-return valve
Ø 110/110
-
-
80
120
912.823.1 - GB