Before storing the heater, make sure it is perfectly cool and dry. Cover the unit with a plastic bag, put it
in its packing box and store it in a dry, ventilated place.
Before starting any maintenance task, shut down, unplug and let the heater cool down
for at least 15 minutes.
Do not attempt any electrical repair yourself. If the heater needs service or repair,
contact a qualified technician.
Do not use a faulty unit unless a qualified technician has inspected and repaired it.
When cleaning, make sure that water does not enter the unit.
Do not open the enclosure to clean the inner parts. Do not spray water into the heater.
Never use solvents, gasoline, toluene and similar aggressive chemicals to clean the
heater.
The following checks BY QUALIFIED PERSONNEL ONLY are recommended before every
seasonal use:
Fuel Filters
Clean fuel filters by unscrewing the filter tray (clockwise) Remove the filter cartridge and wash it with
petrol or replace it if necessary. Check seal O-ring and replace it if necessary. Reassemble the tray
(Fig.2). The fuel filter installed on the gear pump should be cleaned or replaced if necessary by
unscrewing cap H (see Fig. 6)
Fig. 2
Extract the burner head
（
Fig.3
）
Fig.3
Whirl disc
Clean the whirl disc (Fig.3) using a brush and then blow compressed air on it. To get good
combustion the air flow openings in the whirl disc should be perfectly clean and free.
Nozzle
Filter tray
M1.0.WD340.EN
