20175134
38
GB
Maintenance
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases.
Significant differences with respect to the previous measure-
ments indicate the points where most care should be exercised
during maintenance.If the combustion values measured before
starting maintenance do not comply with applicable legislation or
do not indicate efficient combustion, consult the Tab. P or contact
our Technical Support Service to implement the necessary ad-
justments.
It is advisable to set the burner according to the type of gas used
and following the indications in Tab. P.
Tab. P
7.2.4
Safety components
The safety components should be replaced at the end of their life
cycle indicated in the Tab. Q.
The specified life cycles do not refer to the warranty terms indi-
cated in the delivery or payment conditions.
Tab. Q
7.2.5
Measuring the ionisation current
The burner is fitted with an ionisation system to check that a
flame is present.
The minimum current for control box operation is 6 µA.
The burner provides a much higher current, so controls are not
normally required.
However, if it is necessary to measure the ionisation current, dis-
connect the plug-socket on the ionisation probe cable and insert
a direct current microammeter with a base scale of 100 µA, as
shown in Fig. 34.
7.2.6
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. 35.
EN 676
Air excess
Max. output.
1,2
Min. output.
1,3
GAS
CO
2
theoretic
al max. 0% O
2
CO
2
% Calibration
CO
NO
X
= 1.2
= 1.3
mg/kWh mg/kWh
G 20
11.7
9.7
9.0
100
170
G 25
11.5
9.5
8.8
100
170
G 30
14.0
11.6
10.7
100
230
G 31
13.7
11.4
10.5
100
230
Safety
component
Life cycle
Flame control
10 years or 250,000
operation cycles
Flame sensor
10 years or 250,000
operation cycles
Gas valves (solenoid)
10 years or 250,000
operation cycles
Pressure switches
10 years or 250,000
operation cycles
Pressure adjuster
15 years
Servomotor (electronic cam
(if present)
10 years or 250,000
operation cycles
Oil valve (solenoid) (if pres-
ent)
10 years or 250,000
operation cycles
Oil regulator (if present)
10 years or 250,000
operation cycles
Oil pipes/couplings
(metallic) (if present)
10 years
Flexible hoses (if present)
5 years or 30,000 pressurised
cycles
Fan impeller
10 years or 500,000 start-ups
WARNING
Carefully check the polarities!
Fig. 34
+
-
-
20097837
+
-
-
+
20097839
Checking
air pressure
Checking
gas pressure
Fig. 35
Summary of Contents for RS 310/EV O2 BLU
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