Viessmann Vitocrossal 200 Service Instructions For Contractors page 10

Commissioning, inspection, maintenance
Commissioning the system
C
Fig. 2
10
(cont.)
A B
D
01. Check the heating system pressure.
Permiss. operating
pressure
Minimum operating
pressure
Danger
If the operating pressure is too low, excess
temperatures in the flue system can cause
leaks. Escaping flue gas can cause life
threatening carbon monoxide poisoning.
Ensure the minimum operating pressure
with a minimum pressure switch.
02. For open flue operation: check that the ventilation
facility in the installation room is open.
03. Check control cables:
Connection and kink-free routing
■
Application and seating of retaining clips
■
04. Check the gas supply pressure.
05. Open the gas line shut-off valves.
06. Switch ON the mains isolator (outside the installa-
tion room).
07. Turn on system ON/OFF switch
unit.
If "Burner fault" and
and display C flashes on the burner control unit,
unlock first.
1. Press to confirm the fault message on the
control unit.
2. To do this, press reset button
control unit.
Note
The boiler can enter a fault state during commis-
sioning if the gas line carries insufficient gas.
Purge the gas line again and reset the burner.
08. Adjust the parameters on the boiler control unit in
accordance with the table on page 33.
Note
If the parameters are not set, the boiler service life
and efficiency may be adversely affected.
Control unit installation and service instruc-
tions
09. Check the function of the neutralising system.
Neutralising system operating instructions
6 bar (0.6 MPa)
0.5 bar (50 kPa)
at the control
B
on the display appear
A
on the burner
D