Checking All Gas Equipment For Tightness At Operating Pressure; Locking The Control Unit Into Place - Viessmann Vitodens 333-F Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
Checking all gas equipment for tightness at operating pres-
sure
Danger
Escaping gas leads to a risk of
explosion.
Check gas equipment for tight-
ness.

Locking the control unit into place

1. Pivot control unit B with retaining
frame E up and secure with
screws on the side.
30
(cont.)
2. Pivot control unit B up and lock
side closures C.
3. Turn both screws A up to the cen-
tre of side closures C.