Viessmann WB1A007 Technical Guide

The boiler casing creates a system that is sealed against its sur-
roundings. Any leaks caused by escaping flue gas are returned via
the combustion air, thereby preventing flue gas from entering the liv-
ing space.
When siting the Vitodens in a cellar or basement, an existing chim-
ney or shaft of adequate size may be used for routing the balanced
flue (type C
14(3)x
and C
93x
).
According to CEN/TR 1749, flues that bridge several floors must be
routed inside a shaft with a fire rating of at least 90 minutes, and for
buildings in categories 1 and 2, a fire rating of at least 30 minutes.
The flue gas/ventilation air is routed in a balanced flue pipe up to the
chimney or shaft. The flue pipe is then routed inside the chimney or
shaft to above the roof.
Where no suitable shaft is available, the flue may be routed to the
roof through a retrofitted shaft. For this shaft, a test certificate from
the building inspectorate or a CE designation corresponding to the
design of the shaft is required. In addition, the shaft must have a fire
rating of L30 or L90.
Using third party flue systems
Every approved flue system can be used for type C6. These flue
systems are not tested together with the boilers and do not have
system certification in accordance with the Gas Appliances Regula-
tion 2016/426/EC. If used, you must adhere to the Viessmann
design specifications set out in this technical guide for equipment
type C
13x
, C
33x
, C
14(3)x
, C
53x
, C
63x
, C
83x
and C
93x
, and observe appli-
ance-specific information.
If aluminium flue pipes are used, a condensate trap must additionally
be installed above the boiler flue connection.
1.3 Open flue operation
(Type B
23
and B
33
)
Flue gas is routed through single wall plastic flue pipes (PPs). The
flue system is CE designated and approved in accordance with
EN 14471 (see page 6).
The combustion air is supplied via the annular gap between the flue
pipe and the ventilation air connection on the boiler flue connection
of the Vitodens.
Install the connection pipes (horizontal routing) with a fall of at least
3° (approx. 50 mm/m) to the boiler. In addition, we recommend using
fixing clamps spaced about 1 m apart to support the connection line.
The connection piece to the chimney should be as short as possible.
Therefore position the Vitodens as close to the chimney as possible.
The flue pipe should be designed to be as straight as possible. If
bends are unavoidable, do not install them directly one after another.
It must be possible to test and clean the entire flue gas path as
required.
In accordance with the FeuVO [check local fire regulations], a venti-
lation air aperture is required in the installation room.
No special protective measures or clearances towards combustible
objects, such as furniture, packaging or similar, need to be taken/
observed. The surface temperatures of the Vitodens and the flue
system do not exceed 85 °C at any point.
1.4 Flue gas high limit safety cut-out
According to CE designation to EN 14471 the plastic flue pipe (PPs)
can be used for flue gas temperatures of up to 120 °C (type B).
Measures inside the equipment ensure that the flue gas temperature
of 110 °C will never be exceeded.
A flue gas high limit safety cut-out is therefore not required.
1.5 Lightning protection
If a lightning protection system is installed, any metallic flue system
should be included in the lightning protection scheme.
Flue systems
(cont.)
VITODENS, VITOSOLAR
VIESMANN
5
5414641
1

Viessmann WB1A007 Specifications

General

Brand	Viessmann
Model	WB1A007
Category	Boiler
Language	English