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29
Fig. 10.18
10.11 Visual inspection of appliance
Visually inspect all water joints, seals and
connections for any evidence of leakage
and retighten, grease or replace them as
necessary.
10.12 Checking the gas supply
pressure
Check appliance for gas tightness.
Re-check operational pressures as de-
scribed in section "Checking the gas supply
pressure" on page 49 of this manual.
10.13 Water inhibitor concentration
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 conductivity meter can be used to check
the correct concentration of inhibitor in the
heating water.
MAINTENANCE
10.14 Setting the boiler flue sweep
With the boiler set in flue sweep mode, it is
possible to exclude some boiler automatic
functions making check and control opera-
tions easier.
• Enter "programming mode" by pressing
the 11 and 13 keys simultaneously for 5
seconds (Fig. 10.19) until HiS (Boiler His-
tory) appears on the LCD display (Fig.
10.20).
10
11
Fig. 10.19
Fig. 10.20
• Scroll through the various menus by
pressing the keys 11 (back) or 13 (for-
ward), until ChS (Chimney sweep) ap-
pears on the LCD display (Fig. 10.21).
• Press the 12 key for 1 second to enter the
selected menu.
Fig. 10.21
function
15
12
14
13
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