Viessmann Vitodens 100 WB1A Installation And Service Instructions Manual page 68

Service Instructions
Routine Servicing Instructions
3. Insert the screw at the top of the
boiler.
Note
The outer case forms a seal with
the combustion box: It must there-
fore be securely fitted with the
screw provided.
Start-up the boiler
1. Open gas shut-off valve and switch
on mains voltage.
Checking the CO
See page 53.
Checking all gas equipment for soundness at operating pres-
sure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for
soundness.
Final checks
1. Check that the flue terminal in is
good condition and clear of any
obstructions.
68
(cont.)
2. Check the operation of the appli-
settings
2
2. Return all appliance and external
ance in both central heating and
DHW modes.
controls (if fitted) to their original
settings.