Vitodens In Conjunction With Solid Fuel Boilers - Viessmann VITODENS Technical Manual

Design and sizing information for connection on the flue gas side
Vitodens 200-W, from 45 kW
Rated heating output range
Max. length - system size 80
Max. length - system size 100
Vitodens 300-W, 333-F and 343-F
Rated heating output range
Max. length - system size 60
Max. length - system size 80
The following components are taken into consideration for the maxi-
mum flue lengths:
■ Balanced flue connection pipe D 0.5 m long.
■ 1 balanced flue bend 87° and 1 support bend 87°
or
■ 2 balanced flue bends 45° and 1 support bend 87°
Subtract additional bends, tees and straight lengths from the maximum
length using the following values:
■ Balanced flue connection pipe 0.5 m long: 1 m
■ Balanced flue connection pipe 1 m long: 2 m

Vitodens in conjunction with solid fuel boilers

Routing a plastic flue adjacent to a shaft at risk of chimney fire from
soot (e.g. two draught chimney with wood burning stove) is generally
permitted. Depending on the design of the chimney top and the oper-
ation of the condensing systems (open or balanced flue) different
measures are specified by the fire regulations. Design the room sealed
balanced flue terminals so that flue gas will not be drawn into the air
shaft in dangerous amounts. Also ensure that pressure fluctuations
due to wind influence affect the room sealed balanced flue shaft as
evenly as possible.
For the required steps, see the following sections:
Open flue operation and/or ventilation air not being supplied
through the shaft
For fire safety reasons, the upper portion of combustible flue pipe ter-
minals should be made from non-combustible materials. The length of
flue pipe made from non-combustible materials, situated in area Lg
and protected from thermal radiation, must be at least 300 mm. The
length of the external end pipe of the shaft cover must be no less than
external diameter D of the internal flue pipe.
The standard shaft pack (metal/PPs) contains a stainless steel pipe
(380 mm long). A stainless steel extension (380 mm long) is available
as an additional accessory.
Alternative system size. Balanced flue adaptor must be ordered separately.
*1
VITODENS AND VITOSOLAR
kW 17–45 17–60
m 20
m *1
25
kW
m
m
30–80 30–100
15 —
*1 20
20
1.9–11 1.9–19
15 15
*1 *1
17 17
■ Balanced flue bends 45°: 0.5 m
■ Balanced flue bends 87°: 1 m
■ Balanced flue inspection tee: 1.5 m
Note
Observe the specifications regarding internal shaft dimensions (see
page 12).
For information on routing type C6, see page 4.
Ø D
A
B
C
E D
F
A Shaft cover, metal
B End piece made from non-combustible material
C Secondary ventilation
D Vitodens flue
E Chimney used for solid fuel boiler
F Minimum clearance to DIN V 18160, reduced minimum clearance
or maximum clearance to EN 14471 (see page 12)
Balanced flue operation – Ventilation air is supplied through the
shaft
Design the room sealed balanced flue terminals so that flue gas will
not be drawn into the air shaft in dangerous amounts. Also ensure that
pressure fluctuations due to wind influence affect the room sealed bal-
anced flue system as evenly as possible.
(cont.)
32–125 32–150
— —
20 8
4.0–26 4.0–35
15
*1
20 15
VIESMANN
—
5
8
*1
2
15