![Bosch WR 11 B Installation Manual And Operating Instructions Download Page 17](http://html.mh-extra.com/html/bosch/wr-11-b/wr-11-b_installation-manual-and-operating-instructions_52918017.webp)
6720648592 (2014/05)
Maintenance (must be carried out only by qualified technicians) | 17
7.3
Flue gas safety device
Operation and safety precautions
The flue gas safety device checks the effectiveness of flue gas
extraction by the flue. If it is inadequate, the appliance switches
off automatically so that the combustion fumes do not escape
into the room in which the appl
iance has been installed. The
flue gas safety device resets after a cooling-down period.
If the appliance shuts down while in operation:
Ventilate the room.
Wait about 10 minutes then restart the appliance.
If the problem recu
rs, call an engineer.
Maintenance
If faults occur on the flue gas
safety device, proceed as follows:
Undo flue gas safety
device fixing screw.
Loosen temperature limiters connectors.
Undo magnetic unit connector.
Remove thermocouple.
Replace damaged component wi
th new one and refit using
the reverse of the procedure set out in the table above.
Function check
Flue gas safety devi
ce function check:
Disconnect flue pipe;
Replace with pipe (about 50 cm long) with sealed end;
Fit pipe vertically;
Start up appliance at rate
d output and set temperature
control to maximum temperature;
Under those conditions, the appliance should shut down
after two minutes. Remove te
mporary pipe and reconnect
flue pipe.
DANGER:
The flue gas safety device must not under any
circumstances be switch
ed off, simulated or
replaced by any other component.
DANGER:
The user must never make any modifications
to the flue gas safety device.