Viessmann Vitocrossal 200 Service Instructions Manual page 8

Initial start-up, inspection, maintenance
Further details regarding the individual steps
8
(cont.)
1. Check the heating system pres-
sure.
Permissible boiler operating pres-
sure: 4 bar
2. For open flue operation: Check
that the boiler room ventilation
aperture is open.
3. Check the gas supply pressure.
4. Check that the cleaning aperture
on the flue outlet is closed.
5. Open the gas supply line shut off
valves.
6. Switch ON the mains isolator (out-
side the installation room).
7. Switch ON the system ON/OFF
switch B at the control unit. If
fault indicator lamp A at the con-
trol unit illuminates and burner
control unit display C flashes,
first press reset button D at the
burner control unit.
Note
The system can enter a fault state
during commissioning, if insuffi-
cient gas is in the supply line (the
fault indicator at the control unit
illuminates). Vent the gas supply
line again and reset the burner
control unit.
8. Match the coding at the boiler
control unit according to the table
on page 54.
Control unit installation and
service instructions