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MAINTENANCE
MAINTENANCE
Checking the gas supply
9.10
pressure
Check appliance for gas tightness.
Recheck operational pressures as de-
scribed in section "Checking the gas supply
pressure" to page 54 of this manual.
Water inhibitor concentration
9.11
Where chemical products are used the level
of water treatment should be checked on an
annual basis and re treated after full or par-
tial drain down.
A conductivitymeter can be used to check
the correct concentration of inhibitor in the
heating water.
Setting the boiler chimney
9.12
sweep function
With the boiler set in chimney sweep mode,
it is possible to exclude some boiler auto-
matic functions making check and control
operations easier.
Enter in "programming mode" by pressing
•
keys 11 - 12 - 13 ( Fig. 9.11 ) for 10 seconds
at the same time until the letters
Pr
that al-
ternate with code
01
are displayed on the
LCD display, indicating that "parameter
01"( Fig. 9.12 ) has been activated.
Fig. 9.11
11
12
13
Fig. 9.12
Chimney sweep function at minimum
output
Press keys
• 12
and 13 ( Fig. 9.11 ) at the
same time until the LCD display displays
the letters
LP
that alternate with the heat-
ing water temperature value (e.g.
45
), in-
dicating the activation of the "chimney
sweep function" at minimum output ( Fig.
9.13 ).
