Viessmann VITODENS 050-W Installation And Service Instructions Manual page 20

Installation sequence
Mounting the boiler and making connections
!
Please note
Excessive test pressure will
damage the boiler and the
gas train.
Max. test pressure 150 mbar
(15 kPa). Where higher
pressure is required for
tightness tests, disconnect
the boiler and the gas train
from the main supply pipe
(undo the fitting).
Connecting the safety valve and condensate drain
■ The condensate pipe is connected to
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 to the internal domestic
waste water system, either directly or
via a tundish.
20
A
(cont.)
4. Purge the gas line.
■ If the condensate pipe is routed out-
side the building, use a pipe with min.
7 30 mm and protect the pipe from
frost. Avoid long external pipe runs.
Install a tundish.
!
Please note
A frozen condensate pipe can
result in faults and damage to
the boiler.
Always protect condensate
pipes against frost.
■ Observe local building regulations.
Connect condensate pipe A to the
public sewage system with a constant
fall and a pipe vent.
Observe local waste water regulations.
Note
Fill the trap with water before commis-
sioning.