Viessmann B2HF - Checking all connections on the heating water and DHW sides for leaks; Venting the heating system

43
A
Fig. 31
If required, top up the heating water at top-up valve
A
.
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.
4. Disconnect the supply hose from the boiler drain &
fill valve.
5. Open the gas shut-off valve.
Activating the venting function
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Use to confirm.
5. "Service functions"
Commissioning, inspection, maintenance
Topping up the heating water
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