Gas Regulation Check - Ariston ACO 32 RFFI SYSTEM Installation And Servicing Instructions

3.6.3 G
AS REGULATION CHECK
Analysis cover plate
F . 3.32
IG
3
2
1
S P (W
UPPLY RESSURE ORKING
G20 methane 20 mbar
G31 propane 37 mbar
CO M
2
SETTING AXIMUM
CO at maximum power
2
CO M
2
SETTING INIMUM
CO at minimum power
2
44
4
F
IG
)
T
ABLE
V
ALUE
% vol 8.7 ±0.2 (NG)
% vol 10.2 ±0.2 (LPG)
V (N G )
ALUE AT AS
% vol 9.2 ±0.2 (NG)
% vol 10.6 ±0.2 (LPG)
Supply pressure check
1. Loosen screw "1" (Fig. 3.33) and connect the pressure gauge
connection pipe into the test point.
2. Turn the boiler on at maximum power, enabling the "flue sweep"
function (press the
programming keys
at the top of the display (see Fig. 3.30). The supply pressure
should correspond to that shown for the type of gas the boiler is
designed for methane gas G20 (see table below).
3. Disable the test mode by pressing the reset key.
4. When the check is over, tighten screw "1" and test for tightness.
N : I
OTE F THE WORKING PRESSURE IS INSUFFICIENT CHECK THE GAS
,
METER METER GOVERNOR
.
ERROR
S
ETTING THE
I !
MPORTANT
D
O NOT PROCEED CHECKING AND ADJUSTING THE
UNLESS THE WORKING PRESSURE IS ADEQUATE
N : A
OTE LL SETTINGS ARE TO BE MADE WITH A
PROBE FITTED TO THE FLUE GAS ANALYSIS POINT
Setting the CO2 at minimum power
To check the air/gas ratio at minimum power, proceed as follows:
1. Connect the combustion analyser to the analysis point (Fig.
3.32) after removing the cover plate.
2. Set the boiler to minimum power via the test function (see
paragraph 3.6.1) or by pressing the
and then pressing the
the dashes are at the bottom of the display (see Fig. 3.30).
Ensure the CO
value indicated in
"2" (Fig.3.33) with a screwdriver in small intervals, allowing the
reading to become stable before adjusting further, until you
obtain the correct CO
. 3.33
stable for at least 4 minutes.
3. When the check is over, replace the cap on screw "2" (Fig. 3.33).
4. Disable operation at minimum power by pressing the
or press the
of display see Fig. 3.31).
While the appliance is operating at maximum power, check
the gas rate of the appliance at the gas meter
Setting the CO2 at maximum power
To check the air/gas ratio at maximum power, proceed as follows:
1. With the combustion analyser already connected to the analysis
point, set the boiler to maximum power via the test function (see
paragraph 3.6.1) or by pressing the
4D
and then the programming keys
at the top of the display (see Fig. 3.30).
Ensure the CO
value indicated in
"4" with a screwdriver in small intervals allowing the analyser
reading to stabilise before adjusting further (Fig. 3.33), until you
obtain the correct CO
stable for at least 4 minutes.
2. Disable the test mode by pressing the
The test mode is automatically disabled after 5 minutes.
3. Repeat the air/gas ratio at minimum power check (see
above).
4. Disconnect the analyser, remount the cover plate and check it is
securely in place.
While the appliance is operating at minimum power, check
the gas rate of the appliance at the gas meter
N : W
OTE HEN MAKING ADJUSTMENTS
WAIT FOR THE ANALYSER TO STABILISE BEFORE MAKING
FURTHER ADJUSTMENTS
key for 5 seconds and then press the
and together ensuring the dashes are
,
OR INSTALLATION PIPEWORK FOR
G P
AS RESSURES
.
CO
METER WITH THE
2
button for 5 seconds
button on the control panel, ensure
value on the analyser corresponds with the
2
table 4D. If this is not the case, adjust screw
reading. Allow the reading to become
2
key to check the maximum value (dashes at top
button for 5 seconds
and
value on the analyser corresponds with the
2
table 4D. If this is not the case, adjust screw
reading. Allow the reading to become
2
,
ADJUST SMALL AMOUNTS AND
.
CO
SETTINGS
2
.
key
ensuring the dashes
button.