Checking All Connections On The Heating Water And Dhw Sides For Leaks; Venting The Heating System - Viessmann Vitodens 100-W B1HF Series Installation And Service Instructions Manual

Filling the heating system
1. Close the gas shut-off valve.
2. Switch on the power supply.
3. Activate the filling function (see commissioning
assistant or following chapter).
4. Open shut-off valves
A
5. Open valves and fill the heating system. Mini-
C
mum system pressure
Note
Ensure that the safety valve does not respond
when you are filling the system. If the flow rate
through the safety valve becomes too high, water
may enter the combustion chamber.
Activating the filling function
If the filling function is to be activated after commis-
sioning.
Tap the following buttons:
1. and OK simultaneously for approx. 4 s, then
release.
2. Use / to select "b.5" for the commissioning
assistant.
3. OK
4. The display shows "AP".
Press for 4 s.

Checking all connections on the heating water and DHW sides for leaks

Danger
Risk of electric shock from escaping heating
water or DHW.
When commissioning and after carrying out
maintenance work, check all water side connec-
tions for leaks.

Venting the heating system

1. Close the gas shut-off valve and switch the appli-
ance ON.
2. Activate the venting program (see commissioning
assistant or following chapter).
3. Adjust the system pressure.
The display shows the system pressure.
(cont.)
and (if fitted) B .
0.8 bar (80 kPa).
>
Commissioning, inspection, maintenance
6. Close valves
C .
7. Remove connection line between two valves
During operation, the connection must be interrup-
ted.
5. Use / to select "C.1" for the filling function.
6. OK
7. / to select "ON" for filling.
8. OK
The filling function is activated. The display shows
a circulating rectangle.
The filling function ends automatically after 20 min
or press for 4 s.
4. Disconnect the supply hose from the boiler drain &
fill valve.
5. Open the gas shut-off valve.
.
C
37