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33
20098687
GB
Maintenance
Servomotor
Release the cam 4)(Fig. 26 on page 26) from the servomotor,
turning the notch 2) 90° (Fig. 26 on page 26) and manually
checking that its rotation, backwards and forwards, is smooth.
Connect the cam 4) again.
Burner
Check for excess wear or loose screws in the mechanisms con-
trolling the air damper and the gas butterfly valve. Also make sure
that the screws securing the electrical leads in the terminal board
are fully tightened.
Clean the outside of the burner, taking special care with the artic-
ulated couplings and the cam 4)(Fig. 26 on page 26).
Fan
Check to make sure that no dust has accumulated inside the fan
or on its impellers, as this condition will cause a reduction in the
air flow rate and provoke polluting combustion.
Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics in-
tact, especially the flue gas temperature and pressure in combus-
tion chamber.
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.
Tab. L
7.2.3
Safety components
The safety components should be replaced at the end of their life
cycle indicated in the following table.
The specified life cycles do not refer to the warranty terms indi-
cated in the delivery or payment conditions.
Tab. M
EN 676
Air excess
CO
Max. output.
λ
≤
1.2
Max. output.
λ
≤
1.3
GAS
Theoretical max
CO
2
0 % O
2
CO
2
% Calibration
mg/kWh
λ
= 1.2
λ
= 1.3
G 20
11.7
9.7
9
≤
1000
G 25
11.5
9.5
8.8
≤
1000
G 30
14.0
11.6
10.7
≤
1000
G 31
13.7
11.4
10.5
≤
1000
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 present)
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
Summary of Contents for 3897304
Page 2: ...Translation of the original instructions ...
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