46
A
B
Shown with connection set for finished walls (accessories)
1.
Check the pre-charge pressure of the
diaphragm expansion vessel. See
page 69.
2.
Close the gas shut-off valve.
3.
Open shut-off valves
B
on the heat-
ing water side.
4.
Fill the heating system via boiler drain
& fill valve
A
in the heating return
(depending on the connection set
either on the side or above the boiler).
■ Minimum system pressure
> 1.0 bar (0.1 MPa).
■ Permissible operating pressure
3.0 bar (0.3 MPa).
Note
If the control unit has not been
switched on prior to filling the system,
then the servomotor of the diverter
valve will still be in its central position,
and the system will be completely fil-
led.
5.
If the control unit had already been
switched on before filling began:
Switch control unit ON and activate fill
program (see next chapter).
Note
If the control unit has not been
switched on prior to filling the system,
then the servomotor of the diverter
valve will still be in its central position,
and the system will be completely fil-
led.
6.
Close boiler drain & fill valve
A
.
Activating the filling function
Service menu
1. Press
OK
and
å
simultaneously for
approx. 4 s.
2.
"Service functions"
3.
"Filling"
Filling function is enabled.
4. Ending filling function:
Press
OK
or
ä
.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5773 238 GB
Содержание B2UA
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Страница 12: ...12 sF 17 19 21 20 18 Preparing for installation Preparing the installation cont 5773 238 GB ...
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Страница 15: ...15 28 2x 2x 29 30 Preparing for installation Preparing the installation cont 5773 238 GB Installation ...
Страница 21: ...21 Removing the front panels 2 4 2x 1 3 5 Installation sequence Installing the boiler 5773 238 GB Installation ...
Страница 22: ...22 Siting and levelling the boiler 1 2 SW17 Installation sequence Installing the boiler cont 5773 238 GB ...
Страница 29: ...29 2x 4x 4 3 5 2 1 Installation sequence Opening the control unit casing 5773 238 GB Installation ...
Страница 39: ...39 5 4 2 6 2x 3 1 Installation sequence Closing the control unit casing 5773 238 GB Installation ...
Страница 41: ...41 2x 1 4 2 3 5 Installation sequence Fitting the front panels 5773 238 GB Installation ...
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