Opening The Control Unit Casing - Viessmann FB2B Installation And Service Instructions Manual

Installing the boiler
!
Please note
Excessive test pressure may
damage the boiler and the gas
valve.
Max. test pressure 150 mbar.
Where higher pressure is
required for tightness tests,
separate the boiler and the
gas valves from the gas sup-
ply pipe (undo the fitting).
Flue gas connection
Connect the balanced flue. The flue ter-
minals have to be installed as described
in accordance with the Building Regula-
tions Part J and BS 5440.

Opening the control unit casing

1.
(cont.)
3. Vent the gas line.
For conversion to a different gas type
see page 32
3.
2.
Installation sequence
Flue gas system installation
instructions.
2x
15