Viessmann VITODENS 100 Installation And Service Instructions Manual page 56

Service Instructions
Routine Servicing Instructions
1. Remove the screw at the top of the
boiler.
2. Press down the springs on the
underside of the boiler and remove
the front panel.
Burner removal
1. Switch OFF the mains power.
2. Close the gas shut-off valve and
safeguard against reopening.
56
(cont.)
3. Lift the front panel from the wall
mounting frame.
3. Pull electrical cables from fan
motor A, gas train B, and ignition
unit E.
4. Remove connection hose from air
pressure switch D.