Viessmann Vitodens 100 WB1A Installation And Service Instructions Manual page 81

Repairs
(cont.)
8. Install in reverse order using new
gaskets.
Note
Ensure that fixing holes and seals
are aligned. Install the heat plate
exchanger the correct way round.
Checking the fuse
1. Switch OFF the mains power.
2. Flip down control unit.
3. Remove cover A.
4. Check fuse F1.
Troubleshooting
81