Viessmann VITODENS 242-F Installation And Service Instructions Manual page 25

Installing the boiler
Condensate connection
1. If a DHW safety valve is connected,
connect hose N to the safety valve
drain.
Note
If no DHW safety valve is connected,
do not change the position of hose
N (serves as a vent).
2. Route condensate hose O to the
back (drain in wall K) or to side aper-
ture L (see page 16).
Note
Pull the condensate hose far enough
out of the boiler that no unnecessary
bends are created inside the boiler.
(cont.)
N
O
Installation sequence
3. Route condensate hose M as a U-
bend and connect with a constant fall
and a pipe vent to the public sewage
system or to a neutralising system.
If necessary, connect to an on-site
siphon. Ensure this connection is
secure. GB only:
■ The condensate pipe is connected
with the discharge pipe of the safety
valve. The condensate hose supplied
meets the temperature requirements
that are part of the CE certification.
■ We recommend connecting the con-
densate pipe internally to the domestic
waste water system, either directly or
via a tundish.
■ If the condensate pipe is routed out-
side the building, use a pipe with min.
7 30 mm and protect this pipe from
frost. Avoid long external pipelines.
!
Please note
Frozen condensate pipes can
result in faults and damage to
the boiler.
Always insulate condensate
pipes against frost.
■ Observe local building regulations.
Observe the local waste water regula-
tions.
Note
Fill the siphon with water before com-
missioning.
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