Expansion Relief Valve (Safety Group), Heating Installation; Condensate Drainage Pipework; Danger; H Danger - Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

5 Installation
5.6 Expansion relief valve (safety group), heating
installation
Fig. 5.10 Fitting the expansion relief valve
The ecoTEC is equipped ex factory with connections for
a safety group:
• Expansion relief valve (1)
• Pressure gauge (2)
• Filling device (combined filling and emptying valve) (3)
• Connection for expansion vessel (4)
As an accessory the expansion relief valve for the
heating installation is delivered with the boiler.
• Install the expansion relief valve (1).
• Fit a sufficiently sized expansion vessel (to be
provided on site) at the designated connection (4).

Danger!

H
Danger of burning and scalding!
The expansion relief valve (1) must be
noticeable! Terminate the line in such a way
that escaping water or steam cannot cause
injury to persons.
Please note that the end of the line must be
visible.
Caution!
a
Risk of damage!
The line should be terminated in such a way
that cables or other electrical components
cannot be damaged.
18
bar
1 2 3
5.7

Condensate drainage pipework

4
a
3
4
Fig. 5.11 Condensate drainage pipework
Legend:
a Internal stackpipe
b Internal drainage system
c Gully
d Soakaway
The ecoTEC boilers are equipped with a usual
condensate collector from which the condensate is
continuously removed via the drain pipe.
• Connect the condensate discharge (1) of the boiler to
a condensate drainage pipework (2) which has a
minimum internal diameter of 19 mm (22 mm outside
diameter for all external pipes) and should be made
from an acid-resistant material (e.g. plastic overflow
pipe).
Note!
h
The condensate drainage pipework connected to
the condensate discharge of the boiler must
have a fall throughout its entire length (45 mm
per metre) and should be installed and
connected within the building to prevent
freezing.
The condensate drainage pipework must terminate in a
suitable location, e.g.:
a) Preferably the condensate drainage pipework should
run and terminate internally to the house soil and
vent stack (at least 450 mm above the invert of the
stack). A siphon giving a water seal of at least 75 mm
(3) (built into the boiler) should be incorporated into
the pipe run, and there must be an air break (4) in the
condensate drainage pipework upstream of the
siphon.
Installation and maintenance instructions ecoTEC 0020029172_03
b c
6
3
5 7
1
2
d