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GAS OPERATION
Gas leaks
Make sure that there are no gas leaks on the pipe between the
gas meter and the burner.
Gas filter
Change the gas filter when it is dirty.
Combustion
In case the combustion values found at the beginning of the inter-
vention do not respect the standards in force or, in any case, do
not correspond to a proper combustion, contact the Technical As-
sistance Service in order to carry out the necessary adjustments.
EN 676
Theoretical
max CO
GAS
2
0 % O
2
= 1.2
G 20
11.7
G 25
11.5
G 30
14.0
G 31
13.7
7.3
Opening the burner
Disconnect the electrical supply from the burner
by means of the main system switch.
DANGER
Turn off the fuel interception tap.
DANGER
7.4
Closing the burner
Refit following the steps described but in reverse order; refit all
burner components as they were originally assembled.
After carrying out maintenance, cleaning or
checking operations, reassemble the cover and
all the safety and protection devices of the burner.
Air excess
Max. output.
Min. output
1.2
1.3
Calibration
CO
CO
%
2
mg/kWh
= 1.3
100
9.7
9.0
100
9.5
8.8
100
11.6
10.7
100
11.4
10.5
Maintenance
7.2.5
Checking the air and gas pressure on the
combustion head
To carry out this operation it is necessary to use a pressure gauge
to measure the air and gas pressure at the combustion head, as
shown in Fig. 34.
Wait for the components in contact with heat
sources to cool down completely.
See section "Access to head internal part" on page 24.
45
GB
20182649
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