Combustion Check - Ferroli MODENA S HE Instructions For Use, Installation And Maintenance

Combustion check

Connect the flue gas analyzer to the flue gas sampling
point as shown in the fig. 30 and check combustion as
described in table 4 and table 5.
1. Press the CH button for 5 seconds to place boiler
into test mode
2. Wait for 10 minutes for the boiler to stabilize fully
3. Take the measurement and record
4. Take the boiler to minimum output by pressing the
CH – button, allow the boiler to stabilize for a fur-
ther 10 minutes.
5. Take the measurement and record.
fig. 30 - Flue gas sampling Point
1 = Air - 2 = Fumes
Setting the Air/Gas Ratio valve
There are two adjustments possible on the air/gas ratio valve, the throttle setting at maximum rate and the offset setting
at minimum rate. If either setting is adjusted the combustion values must be rechecked at both rates.
At Maximum Rate:
1. Adjust the boiler to maximum rate in section 3.3 Test Mode.
2. Wait 10 minutes to allow the boiler to stabilize.
3. Now adjust the Throttle setting (fig. 31 - screw A) until the CO
confirm that the CO/CO
NOTE: ADJUST IN STEPS OF NO MORE THAN 1/8 OF A TURN AND WAIT 1 MINUTE AFTER EACH ADJUSTMENT
TO ALLOW THE SETTING TO STABILISE.
In the event that the CO
helpline number.
Should you require any assistance during the set up procedure call our Technical service helpline or should you
require a service engineer to visit call our service centre at numbers listed on last page of this manual.
At Minimum Rate:
1. Adjust the boiler to minimum output and allow the boiler to stabilize.
2. Now adjust the offset pressure setting (fig. 31 - cup B) until the CO
table 5), confirm that the CO/CO
NOTE: ADJUST IN STEPS OF NO MORE THAN 1/8 OF A TURN AND WAIT 1 MINUTE AFTER EACH ADJUSTMENT
TO ALLOW THE SETTING TO STABILISE.
24
ratio is within limits.
2
setting level with an acceptable CO/CO
2
ratio is within limits.
2
cod. 3541C364 - Rev. 00 - 12/2012
MODENA S HE
Tabella. 4 - Maximum rate
NATURAL GAS ACCEPTABLE COMBUSTION RANGE
MAXIMUM RATE AFTER 10 MINUTES FROM COLD
CO/CO
Boiler Model
2
MODENA 18 S HE
0.004
MODENA 25 S HE
0.004
MODENA 32 S HE
0.004
Tabella. 5 - Minimum rate
NATURAL GAS ACCEPTABLE COMBUSTION RANGE
MINIMUM RATE AFTER 10 MINUTES FROM COLD
Boiler Model CO/CO
2
MODENA 18 S HE
0.004
MODENA 25 S HE
0.004
MODENA 32 S HE
0.004
If the combustion reading is greater than the ac-
ceptable value AND the integrity of the complete
flue system and combustion circuit seals have
been verified and the inlet gas pressure (and gas
rate) have been verified, proceed as in section "
Setting the Air/Gas Ratio valve" pag. 24.
is at the correct SETTING LEVEL (see table 4),
2
ratio cannot be obtained please contact the
2
is at the correct SETTING LEVEL (see
2
RATIO CO NG CO LPG
2 2
8,7 ÷ 9,2 10 ÷ 10,5
RATIO CO NG CO LPG
2 2
8,2 ÷ 8,7 9,5 ÷ 10,0
EN