Filling the heating system
!
Please note
Unsuitable fill water increases the level of deposits and corrosion and
may lead to boiler damage.
&
Thoroughly flush the entire heating system prior to filling it with water.
&
Only use fill water of potable quality.
&
Soften fill water harder than 3.58 mmol/l.
&
An anti-freeze additive suitable for heating systems can be mixed with
the fill water.
1.
Check the inlet pressure of the dia-
phragm expansion vessel.
2.
Close the gas shut-off valve.
3.
Drain the heating system via boiler
fill & drain valve
A
(minimum sys-
tem pressure >0.8 bar).
Note
&
If the control unit had
not already
been switched ON before filling
began: The diverter valve is in its
central position, and the system
will be completely filled.
&
If the control unit had
already
been switched ON before filling
began: In code 1, set coding
address "2F:2" (see page 39).
At this point, the diverter valve is
in its central position.
Whilst the filling program runs,
the display shows "bF" (constant
temperature control unit) or
"Filling" (weather-compensated
control unit).
4.
Close boiler fill & drain valve
A
.
5.
Set coding address "2F:0".
Further details regarding the individual steps
7
Initial start-up, inspection, maintenance
5692
569
GB
Summary of Contents for Vitodens 300
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