Condensate Drain Pipe And Neutralisation - Viessmann VITODENS 200-W Type B2HA Technical Manual

Design information
Vitodens 200-W, 120 and 150 kW
A Drain hose (Vitodens standard delivery)
B Drain outlet kit (accessories)

Condensate drain pipe and neutralisation

Condensate created during heating operation, in both the condens-
ing boiler and the flue pipe, must be drained off in accordance with
appropriate regulations. With gas combustion, the condensate will
4
have a pH value between 4 and 5.
Code of Practice DWA-A 251 on "Condensate from condensing boil-
ers", which is generally based on the local waste water regulations
[in Germany], determines conditions for draining condensate from
condensing boilers into the public sewer system.
The composition of condensate drained from Vitodens condensing
boilers meets the requirements specified in Code of Practice
DWA-A 251.
The condensate drain pipe to the sewer connection must be freely
accessible for inspection.
It must be installed with a continuous fall and must contain a stench
trap. Also provide a suitable facility for sampling.
Condensate drains must only be made from corrosion-resistant
materials (e.g. reinforced hoses).
Never use any zinc-plated materials or those containing copper
for pipes, connection pieces, etc.
A siphon is installed in the condensate drain to prevent flue gases
escaping.
Local water regulations and/or specific technical circumstances may
prescribe designs which 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
combustion output
Up to a rated heating output of 200 kW, the condensate from a gas
condensing boiler can generally be introduced into the public sew-
age system without prior neutralisation.
Also ensure that your domestic drainage systems are made from
materials that are resistant to acidic condensate.
According to Code of Practice DWA-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
VIESMANN
72
(cont.)
A
B
Neutralising system
B
A Condensate drain
B Neutralising system
C Ventilation via the roof
The Vitodens can (if required) be supplied with a separate neutralis-
ing system (accessories). Any condensate is piped to and processed
in the neutralising system.
The condensate drain pipe to the sewer connection must be accessi-
ble for inspection. Install it with a fall and a stench trap on the sewer
side, and provide a suitable facility for extracting samples.
Install a condensate lifting pump if the Vitodens has been installed
below the waste water anti-flooding level.
Condensate lifting pumps are available as accessories (see Vitoset
pricelist).
Since the consumption of neutralising granulate depends on the
operating mode of the system, carry out regular checks during the
first year of operation to determine the required top-up volume. It is
feasible that one fill may last longer than one year.
C
A
VITODENS 200-W