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Filling the heating system
Fig. 26
Shown with the connections at the top
1. Check the pre-charge pressure of the expansion
vessel.
2. Close the gas shut-off valve.
3. Connect the fill hose to boiler drain & fill valve
in the heating flow. Either on the side or top of the
boiler depending on the connection set.
4. Open shut-off valves
B
5. Fit hose to air vent valve
suitable container or drain outlet.
Activating the filling function
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Use
to confirm.
(cont.)
B
A
B
D
E
C
A
on the heating water side.
. Route the hose into a
C
Commissioning, inspection, maintenance
6. Activate the filling function (see commissioning
assistant or following chapter).
7. Fill the heating system via boiler drain & fill valve
. Minimum system pressure
A
Check the system pressure at pressure gauge
Indicator must be in the green band.
Note
Close air vent valve
C
sure at boiler drain & fill valve
8. Close boiler drain & fill valve
5. "Service functions"
6. "Filling"
7. Activate the filling function with
The display shows the system pressure.
The filling function ends automatically after 20 min
or when you tap
.
1.0 bar (0.1 MPa).
>
D
and adjust system pres-
.
A
.
A
.
.
35
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