Condensate Drain Pipe And Neutralisation - Viessmann VITODENS 222-F Series Technical Manual

Design information
Vitodens 222-F
B
A Drain hose (Vitodens standard delivery)
B Trap and pipe vent

Condensate drain pipe and neutralisation

During heating operation, condensate with pH values between 4 and
5 is formed in the condensing boiler and in the flue.
The condensate should be drained in accordance with appropriate
regulations.
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 drain pipes 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 trap 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.
VITODENS
(cont.)
A
Vitodens 242-F
A
B
A Drain hose (Vitodens standard delivery)
B Trap and pipe vent
Contact your local authority responsible for waste water manage-
ment in good time 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.
Domestic drainage systems must be made from materials that are
resistant to acidic condensate.
According to the Code of Practice DWA-A 251, these materials
include:
■ Vitrified clay pipes
■ Hard PVC pipes
■ PVC pipes
■ PE HD pipes
■ PE pipes
■ ABS/ASA pipes
■ Stainless steel pipes
■ Borosilicate pipes
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