Condensate Connection; Condensate Drain And Neutralisation - Viessmann VITODENS 300-W Technical Manual

Design information
(cont.)
Vitodens 200-W and 300-W
A
B
C
DHW cylinder below the boiler
A DHW
B Cold water
C DHW circulation
Vitodens 222-W
The connection of a DHW circulation pipe is not recommended.
DHW circulation for gas combi boilers
Due to the low water content of plate heat exchangers, the connection
of DHW circulation lines is not recommended for gas combi boilers.

6.5 Condensate connection

Route the condensate drain pipe with a constant fall.
The condensate from the flue system (if equipped with a drain), should
be routed to the public sewage system together with the boiler con-
densate, either directly or (if installed) via a neutralising system (acces-
sories).
Vitodens 200-W and 300-W
A Drain hose (standard delivery for the Vitodens)
B Drain outlet kit (accessories)

Condensate drain and neutralisation

Drain the condensate created in the condensing boiler and in the flue
pipe during heating operation in accordance with appropriate regula-
tions. With gas combustion, the condensate will have a pH value
between 4 and 5.
VITODENS
DHW cylinder adjacent to the boiler
A DHW
B Cold water
C DHW circulation
Even the low heat losses of thermally insulated DHW circulation lines
(to EnEV) lead to a higher cycling frequency for the gas combi boiler
(reheating).
Note
A pipe vent valve must be installed between the siphon and the neu-
tralising system.
Vitodens 222-W
A
A
B
B
A Drain hose (standard delivery for the Vitodens)
B Drain outlet kit (accessories)
The Code of Practice DWA-A 251 on "Condensate from condensing
boilers", 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.
A
C
B
VIESMANN
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