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21 - MAINTENANCE
The appliance must be systematically controlled at regular inter-
vals to make sure it works correctly and efficiently and conforms
to legislative provisions in force.
The frequency of controls depends on the conditions of installa-
tion and usage,
it being anyhow necessary to have a complete service check
carried out by A competent provider every year.
• Check and compare the boiler's performance with the relative
specifications. Any cause of visible deterioration must be imme-
diately identified and eliminated.
• Closely inspect the boiler for signs of damages or deterioration,
particularly with the drainage and aspiration system and electrical
apparatus.
• Check and adjust - where necessary - all the burner's parame-
ters
The boiler is supplied with the settings shown in the table. But said values may be adjusted by following the graphs given here below,
depending on installation requirements or regional rules and regulations combusted gas emission limits.
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
2
6200
5800
5400
5000
4600
4200
3800
3400
3000
2600
2200
1800
1400
1000
2
Heat capacity curve – emissions (Qnrisc) – 25 HE
4
6
8
10
(HEATING HEAT CAPACITY (K7)
Heat capacity curve – fan rpm (Qnrisc) – 25 HE
4
6
8
10
• Check and adjust - where necessary - the system's pressure.
• Analyze combustion. Compare results with the product's
specifi- cation. Any loss in performance must be identified and
corrected by finding and eliminating the cause.
• Make sure the main heat exchanger is clean and free of any
residuals or obstruction.
• Check and clean - where necessary - the condensation
trap to make sure it works properly.
lMPORTANT: always switch off the power to the appliance
and close the gas by the gas cock on the boiler before
carrying out any maintenance and cleaning of the boiler.
Do not clean the appliance or any part with flammable substances
(e.g. petrol, alcohol, etc.).
Do not clean enameled and plastic parts with paint solvents.
Panels must be cleaned with ordinary soap and water only.
12
14
16
12
14
16
(HEATING HEAT CAPACITY (K7)
18
20
22
18
20
22
24
ENGLISH
24
26
26
20
27
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