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9.12
Checking the gas supply pres-
sure
Check appliance for gas tightness.
Recheck operational pressures as described in
section "Checking the gas supply pressure" to
page 60 of this manual.
9.13
Water inhibitor concentration
Where chemical products are used the level of
water treatment should be checked on an an-
nual basis and re treated after full or partial drain
down.
A conductivitymeter can be used to check the
correct concentration of inhibitor in the heating
water.
9.14
Setting the boiler chimney sweep
function
With the boiler set in chimney sweep mode, it
is possible to exclude some boiler automatic
functions making check and control operations
easier.
• Enter in "programming mode" by pressing keys
12 - 15 - 16 (Fig. 9.19) for 10 seconds at the
same time until the letters P01 are displayed
on the LCD display, indicating that "parameter
01" (Fig. 9.20) has been activated.
9
10
11
12 13
Fig. 9.19
- 80 -
MAINTENANCE
Fig. 9.20
Chimney sweep function at minimum output
in domestic hot water mode
• Press keys 15 and 16 (Fig. 9.19) at the same
time until the LCD display displays the letters
LP that alternate with the heating water tem-
perature value (e.g.45), indicating the activa-
tion of the "chimney sweep function" at mini-
mum output (Fig. 9.21).
Fig. 9.21
Chimney sweep function at minimum output
17
in heating mode
• By pressing 16 (Fig. 9.19) it is possible to
16
change power in chimney sweep mode: with
the letters hP on the LCD display which alter-
nate between the heated water temperature
15
(i.e.32), we are in the "chimney sweep func-
tion" at the minimum power during heating
14
(Fig. 9.22).
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