Viessmann Vitodens 200 Technical Manual page 80

2.5 Connections on the gas and the water side
Condensate connection
Route the condensate drain with a
constant slope.
Route the condensate from the flue gas
system (if equipped with a drain),
together with the boiler condensate
directly or (if installed) via a neutralising
system to the public sewer.
Vitodens 200 and 300
H up to 35 kW
2
A B
A Drain hose
(standard delivery for the Vitodens)
B Drain outlet kit
(accessories)
Vitodens 343
The Vitodens 343 incorporates a siphon
as a stench trap.
For the condensate connection,
see the specification on page 21.
Condensate drain and neutralisation
Drain the condensate created during the
heating operation in the condensing
boiler and in the flue pipe in accordance
with appropriate regulations. During
combustion, it will have pH values
between 4 and 5.
The Code of Practice ATV DVWK A 251 on
"Condensate from condensing boilers",
which is generally based on the local
waste water regulations [in Germany],
determines the conditions for draining
condensate from condensing boilers into
the public sewer system.
Condensate from a gas fired combustion device up to 200 kW combustion output
Up to a rated output of 200 kW, the
condensate from a gas fired condensing
boiler can generally be introduced into
the public sewer system without prior
neutralisation.
80
Note
A pipe vent valve should be installed
between the siphon and the neutralising
system.
H from 49 kW
The consistency of condensate drained
from Vitodens condensing boilers meets
the requirements specified in the Code of
Practice ATV DVWK A 251 [Germany].
The condensate drain to the sewer
connection must be able to be inspected.
It must be installed with a slope incl. a
stench trap and must provide suitable
facilities for extracting samples.
The bottom drain should be located
below the anti-flooding level of the flue
gas collector box.
Condensate drains must be made from
corrosion-resistant materials (e.g. fibre
reinforced hoses).
Please also ensure that your domestic
drainage system is made from materials
which are resistant to acidic condensate.
Vitodens 333
A
A
B
B
Never use any galvanised materials or
those containing copper for pipes,
connectors, etc.
Install a U-bend in the condensate drain
to prevent flue gases from escaping.
Local waste water regulations and/or
specific technical circumstances may
require designs which vary from those
described in the above Codes of Practice.
It would be appropriate to make contact
with your local authority with
responsibility for waste water
management prior to the installation, to
inform yourself about local regulations.
According to Code of Practice
ATV DVWK A 251, these are:
H Stoneware pipes
H Hard PVC pipes
H PVC pipes
H PE HD pipes
H PP pipes
H ABS/ASA pipes
H Stainless steel pipes
H Borosilicate pipes
VITODENS