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4.3 Maintenance
Periodical inspection
To ensure proper operation of the unit, it is necessary to have an annual inspection car-
ried out by qualified personnel, providing for the following:
•
heat exchanger check and cleaning with suitable products if dirty or clogged
•
check and possible cleaning of burner (do not use chemical products or wire brush-
es)
•
check and cleaning of electrodes, which must be free of deposits and properly po-
sitioned
•
seal and gasket check (burner, sealed chamber, etc.)
•
check and cleaning of sludge remover filters and system filters
•
check, cleaning and filling of condensate drain traps
•
check of wiring, contacts, electrical actuators
•
check and cleaning of generator air inlets and boiler room air intakes
•
check and cleaning of fume evacuation duct-manifold-flue system.
•
expansion tank check and prefilling
•
check of correct and stable system water pressure, ensuring conformity with the re-
quired working pressure.
B
The use of automatic filling systems for reinstatement of operating condi-
tions must provide for adequate treatment of the water (ref. *** '' on page
96 ***)
•
check of heating system water chemical and physical parameters (ref. *** '' on page
96 ***)
•
water and gas system tightness check
•
check of correct and stable gas supply pressure to plant (20 mbar for operation with
natural gas); any fluctuations or pressure drops below the declared value can create
malfunctioning and stops with need for manual resetting.
•
burner ignition and control and safety device check (gas valve, flowmeter, thermo-
stats, etc.)
•
circulating pump check, freeing when necessary
•
fume analysis and check of combustion parameters
The casing, control panel and aesthetic parts of the boiler can be cleaned with
A
a soft damp cloth, possibly soaked in soapy water. All abrasive detergents and
solvents should be avoided.
Opening the casing
To open the boiler casing (fig. 66):
1.
Undo the two screws and remove the cover A.
1.
Release and remove the upper panel B.
2.
Undo the two screws and remove the lower panel C.
80
EN
A
fig. 66
fig. 67
cod. 3541F574 - Rev. 00 - 09/2017
QUADRIFOGLIO B
Burner door opening
To access the burner observe the following instructions.
1.
Remove the upper front panel and the cover (fig. 68).
2.
Remove the four nuts and washers (fig. 69).
3.
Open the burner door (fig. 69).
B
After opening the burner door and hooking it onto the support arms make
sure to insert a pin in the safety hole (ref. A - fig. 69) to prevent the risk of
accidental release during maintenance operations.
To close it, repeat these operations in reverse order.
B
Tighten down the 4 nuts (fig. 70).
When finished check the perfect tightness of the gas circuit.
fig. 68
fig. 69
fig. 70
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