35
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
A
in the heating flow. Either on the side or top of the
boiler depending on the connection set.
4.
Open shut-off valves
B
on the heating water side.
5.
Fit hose to air vent valve
C
. Route the hose into a
suitable container or drain outlet.
6. Activate the filling function (see commissioning
assistant or following chapter).
7. Fill the heating system via boiler drain & fill valve
A
. Minimum system pressure
>
1.0 bar (0.1 MPa).
Check the system pressure at pressure gauge
D
.
Indicator must be in the green band.
Note
Close air vent valve
C
and adjust system pres-
sure at boiler drain & fill valve
A
.
8.
Close boiler drain & fill valve
A
.
Activating the filling function
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Use to confirm.
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 .
Commissioning, inspection, maintenance
Filling the heating system (cont.)
6151778
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