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5.
MAINTENANCE
Disconnect the electric supply to the burner by switching off the main power switch and close the
gas shut-off valve before maintaining or checking the system.
The burner requires scheduled maintenance that must be carried out by qualified personnel and in compli-
ance with local legislation.
Scheduled maintenance is vital for the smooth operation of the burner; it avoids waste of fuel and reduces
harmful emissions into the atmosphere.
5.1 FAN CLEANING
Carry out maintenance operations
paying attention not to damage or un-
balance the fan during cleaning oper-
CAUTION
ations.
Proceed as follows:
undo the screws (1) (Fig. 11) and screw (2 ground
clamps);
disconnect the electric wiring from the control box
(3);
take out the suction inlet (4) without disassembling
the components.
Clean the fan and inside the suction inlet using an
appropriate brush and compressed air.
If necessary, carefully disassemble the fan.
To refit, it is important to respect position B (fig.
12) indicated in the table.
Model
HELIS 2 GI510
HELIS 2 GI710
To refit, follow the procedure above but in reverse
order; refit all burner components as they were
originally assembled.
5.2 BASIC OPERATIONS
Check at regular intervals that the holes of the
gas head are not obstructed. If they are, clean
them with a suitable tool as shown in the figure
13.
Check there are no occlusions or obstructions in
the inlet or return pipes, in the air suction areas
and in the combustion product waste pipe.
Check that the burner and gas train electrical
connections are correct.
Check that the positioning of the air pressure
test point (8, fig. 1, page 2) is correct.
Check that the gas train is suited to the burner
capacity, the type of gas used and the network gas
pressure.
Check that the positioning of the combustion
head is correct and that it is properly fixed to the
boiler.
Check that the air damper is positioned cor-
rectly.
20017630
1
3
2
1
B
69 ± 0.2 mm
69 ± 0.2 mm
Suction inlet
12 GB
D9824
Motor
Fan
D9825
Fig. 11
1
4
Fig. 12
B
Fig. 13
E9252
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