Viessmann VITOCROSSAL 200 Type CM2 Technical Manual page 34

Design information
20
8
16
15
30
10
5
20
0
160 180 200
190
required total
burner draught in Pa
■ At a flue height of 16 m, the intersection with the performance/diam-
eter curve results in a required draught at the flue outlet of 30 Pa.
■ Dropping the "plumb line" onto the axis below results in a required
total burner draught of 190 Pa.
For vertical roof outlets when the Vitocrossal 200 and 300 are
installed in attics
Only use the roof outlet if the ceiling of the installation room is also part
of the roof structure. In constructing the roof outlet, maintaining a min-
imum distance to combustible materials is not required.
Secondary ventilation ensures that no temperatures in excess of
85 °C occur on any surface around the roof outlet.
According to TRGI 2008, a minimum distance of 100 mm must be
maintained between the flue pipe (connection piece) and combustible
materials.
Max. extended pipe length 6 m with the max. number of bends
■ 87° 2 pce
■ 45° 2 pce
A
7
A Flue gas
B Ventilation air/ventilation air aperture
VIESMANN
34
(cont.)
6
5
3
4
B
3
2
1
For a different number of bends, either deduct from or add to the
extended pipe length 1 m for 87° bends or 0.75 m for 45° bends.
Install an inspection port for checking and cleaning the flue pipe inside
the installation room.
Vertical flat roof outlet
Integrate the flat roof collar into the roof skin according to the flat roof
guidelines (see page 43). Insert the roof outlet from above and push
onto the flat roof collar.
Note
Install the flue system so that it is free of load and torque stress. If the
flues are > 5 m, provide braces on site.
1 Boiler flue connection
(order separately)
2 Flue bend
87° (1 pce)
45° (2 pce)
3 Pipe
– 2 m long (2 pce = 4 m long)
– 2 m long (1 pce)
– 1 m long (1 pce)
– 0.5 m long (1 pce)
4 Inspection piece, straight
(1 pce)
5 Roof outlet
(system size 100) with fixing clamp
Length 1.2 m
(below the roof 0.2 m and 1 m above the roof line)
Colour: black or terracotta
6 Universal cover plate
7 Universal roof tile
(colour black or terracotta)
or
Flat roof collar
Reducer
DN 125/100
(order with a Vitocrossal 300, 87 to 115 kW, and install next to
the coaxial roof outlet)
Above roof extension
0.5 or 1 m long (available on request)
Gas condensing boilers