Cleaning The Burner; Operating Anomalies - Checking The Ionisation Current - Carel gaSteam 45 Manual Del Usuario

6.2 Cleaning the burner

The burner must be checked by authorised and qualifi ed personnel once or twice a year, according
to use.
Before performing any maintenance on the burner, check its general condition, carrying out the opera-
tions listed below:
• remove the burner head as described previously;
• using a brush, clean the inside of the burner head; make sure not to crush the metal mesh (Fig. 6.e);
• remove all gas and electrical connections from the burner assembly;
• check for dust deposits on the fan and if necessary remove the parts required to clean it (Fig. 6.f).
• clean the fan using a brush (Fig. 6.g).
WARNING: to avoid damaging the fan, never use a jet of compressed air when cleaning it.
When reassembling the parts, check:
• the condition of the gaskets (replace if necessary);
• that the position of the electrodes corresponds to Fig. 6.c.
Fig. 6.e
Fig. 6.f

6.3 Operating anomalies - checking the ionisation current

The ionisation current is checked by placing a microammeter set to 10 µA full scale (direct current) in
series with the fl ame detection electrode.
The wrong positioning of the electrode may lead to a decrease in the ionisation current and shut the
burner down due to incorrect fl ame detection. In this case, check the correct position and condition of
the electrode, its electrical connections, and the earth connection of the burner. The ionisation current is
normally 5 µA.
IMPORTANT WARNING: after having replaced or checked the parts in the water circuit, make sure that
the connections have been completed correctly and are tight. Start the unit again and run a number of
fi ll and drain cycles (2 to 4), after which, applying the safety procedure, check for any water leaks.
For details of the spare parts, see the SPARE PARTS manual.
gaSteam HARDWARE +030220538 - rel. 1.4 - 22.01.2008
A
Fig. 6.c
Fig. 6.d
Fig. 6.g
Fig. 6.h
1
Min 0,9 µA
1 microammeter with 10 µA full scale
2 test equipment
Fig. 6.i
19
B
2