4.2 Condensate Connection; Condensate Drain And Neutralisation - Viessmann VITODENS 200-W Technical Manual

Design information

4.2 Condensate connection

Route the condensate drain pipe with a constant fall.
Route the condensate from the flue system (if equipped with a drain),
together with the boiler condensate directly or (if installed) via a neu-
tralising system (accessory) to the public sewage system.
Vitodens 200-W, 45 and 60 kW
A Drain hose (standard delivery for the Vitodens)
4
B Drain outlet kit (accessories)

Condensate drain and neutralisation

Drain the condensate created during the heating operation in the con-
densing boiler and in the flue pipe in accordance with appropriate reg-
ulations. During gas combustion, the condensate will have a pH
between 4 and 5.
Code of Practice ATV-DVWK-A 251 "Condensate from condensing
boilers", which is generally based on the local waste water regulations
[in Germany], defines the conditions for draining condensate from
condensing boilers into the public sewage system.
The composition of condensate drained from Vitodens condensing
boilers meets the requirements specified in Code of Practice ATV-
DVWK-A 251.
The condensate drain pipe to the sewer connection must be able to
be inspected.
It must be installed with a continuous fall and must contain a stench
trap. Also provide a suitable facility for sampling.
Condensate drain pipes must only be made from corrosion-resistant
materials (e.g. reinforced hose).
Never use any galvanised materials or those containing copper
for pipes, connection pieces etc.
A siphon is installed in the condensate drain to prevent flue gases
escaping.
Local waste water regulations and/or specific technical circumstances
may specify designs that vary from those described in the above
Codes of Practice.
It is advisable to contact your local authority responsible for waste
water management prior to installation, to find out about local regula-
tions.
Condensate from gas combustion equipment up to 200 kW com-
bustion output
Up to a rated heating output of 200 kW, the condensate from a gas
condensing boiler can generally be introduced into the public sewage
system without prior neutralisation.
Also ensure that your domestic drainage systems are made from
materials that are resistant to acidic condensate.
VIESMANN
34
(cont.)
A
B
Note
A pipe vent valve must be installed between the siphon and the neu-
tralising system.
Vitodens 200-W, 80 and 105 kW
A Drain hose (standard delivery for the Vitodens)
B Drain outlet kit (accessories)
According to Code of Practice ATV-DVWK-A 251, these materials
include:
■ Clay pipes
■ Hard PVC pipes
■ PVC pipes
■ PE HD pipes
■ PP pipes
■ ABS/ASA pipes
■ Stainless steel pipes
■ Borosilicate pipes
Neutralising system
B
A Condensate drain
B Neutralising system
C Ventilation via the roof
A
B
C
A
VITODENS 200-W