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16 | Maintenance
6 720 608 992 (2011/12)
7 Maintenance
To ensure that gas consumption and the environmental
load (pollution, etc.) remain as negligible as possible
over time, we recommend the appliance be maintained
on an annual basis.
These jobs can only be done by a Bosch authorised
service agent.
7.1 Flue gas safety device
Operation and precautions
This probe verifies the condition of flue gas evacuation
and, in case of malfunction, it automatically turns off the
heater. This prevents combustion gases from entering
the room where the gas heater has been installed. The
probe restarts after a reset period.
If the heater turns off during operation:
B Ventilate the room.
B After 10 minutes, turn on the heater once again.
Call a qualified technician if the same thing happens
again.
Maintenance*
If the probe malfunctions, proceed as follows:
B Unscrew the probe fixing screw.
B Detach the ignition unit terminal.
B Replace the faulty part and re-assemble in reverse
order.
Operating check*
To check the correct operation of the flue gas safety
device, proceed as follows:
B Remove the combustion gases flue pipe.
B temporarily replace it with a pipe (approximately 50
cm long) blocked at one end.
B The pipe must be installed vertically.
B Turn on the heater at nominal power and with the
temperature selector adjusted to maximum
temperature.
In these conditions, the heater must turn off no more
than two minutes afterwards, at most. Remove the
pipe and replace the flue pipe.
* These procedures must be performed by a qualified
installer/service agent.
DANGER:
Failure to perform maintenance procedures
can lead to appliance malfunction, errors,
service calls and loss of warranty.
Maintenance must only be performed by a
qualified technician. Maintenance
information is contained in a service manual
available to licenced technicians upon
request from Bosch.
DANGER:
The probe must never be turned off,
modified or replaced with a different part
under any circumstances.
DANGER:
The user must never touch the flue gas
safety device.
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