Reducing Operational Output (If Necessary) - Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors

Commissioning, inspection, maintenance
Commissioning the system
07. Turn ON the system ON/OFF switch on the control
unit.
Note
The burner will start with a delay of approx. 3 min.
If a fault is shown on the control unit and the dis-
play on the burner control unit is flashing, first per-
form a reset. Press reset button R on the burner
control unit and reset the burner at the control unit.
Vitotronic operating instructions
Note
The appliance can enter a fault state during com-
missioning if there is still air in the gas line (fault
indicator on the control unit illuminates). Purge the
gas line again and reset the burner control unit.
If the fault persists, the inlet strainer of the gas
train may have become blocked by work carried
out on the gas line.
Danger
Escaping gas leads to a risk of explosion.
First close the shut-off valves in the gas line
again.
Unscrew the flange on the gas train and clean the
strainer. A blocked strainer is not recognised by
the gas pressure test at the flange.

Reducing operational output (if necessary)

Status Service
R
S
Fig. 10
1. Press "S" and hold for longer than 2 s.
flashes.
2. should be pressed until the display shows "6"
under "Service".
3. Press "S"; the display shows "6" under "Status".
16
(cont.)
08. Adjust the codes at the boiler control unit.
Control unit installation and service instruc-
tions
09. Check the function of the neutralising system (if
installed), including the hydraulic seal in the
siphon.
Neutralising system operating instructions
10. Check all gaskets and plugs, and retighten if nec-
essary.
Note
We recommend checking all connections on the
heating water side for tightness approx. every 500
hours run.
4. Press "S"; the display shows "1" under "Status"
and the current value for the maximum heating out-
put is shown in % under "Service".
5. or should be pressed for the required maximum
heating output.
6. Press "S" to confirm. If applied successfully, the
display shows "1" under "Service", or "0" will be
shown if unsuccessful.
7. Press "S" to switch to the operating display.
8. Press "R".
The system will be restarted.