Viessmann VITOCROSSAL 200 Service Instructions Manual page 8

Commissioning, inspection, maintenance
Further details regarding the individual steps
A
C
8
B
D
(cont.)
2. For open flue operation: Check that
the vents in the installation room are
open.
3. Check the gas supply pressure.
4. Open the gas line shut-off valves.
5. Switch ON the mains isolator (outside
the installation room).
6. Switch ON system ON/OFF switch
B at the control unit. If fault indicator
lamp A on the control unit illumi-
nates and burner control unit display
C flashes, initially press reset button
D on the burner control unit.
Note
The system can enter a fault state
during commissioning if there is
insufficient gas in the supply line (the
fault indicator on the control unit illu-
minates). Vent the gas pipe again
and reset the burner control unit.
7. Set the code at the boiler control unit
according to the table on page 55.
Control unit installation and
service instructions
8. Check the function of the neutralising
system.
Neutralising system operating
instructions