Viessmann B1HF - Page 18

18
1.
4.
3.
2.
37
37
Fig. 7
1. Replace gaskets. Fit valves and gas shut-off valve.
Internal gasket diameter:
■
Gas connection Ø 18.5 mm
■
Connections on the heating water side
Ø 17.0 mm
Note
Gasket for gas connection is attached to the gas
shut-off valve.
2. Suspend the Vitodens from the wall mounting
bracket.
3. Note
Only remove the locking clip under the gas pipe
union nut once the appliance has been installed.
Clip is no longer required.
Installation sequence
Mounting the boiler and making connections (cont.)
6167586
Installation