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4.3
DISASSEMBLING THE SHELL
(fig. 21)
The casing may be removed completely to
facilitate boiler maintenance, as shown in
fig. 21. Turn the panel control forward for
access to the internal components of the
boiler.
4.4
MAINTENANCE
To guarantee functioning and efficiency of
the appliance, in respect of the legal pro-
visions in force, it must be regularly
checked; the frequency of the checks
depends on the type of appliance and the
installation and usage conditions.
In any case, it should be inspected at
least once a year by a qualified technician.
Carry out the cleaning of the generator in
Codice/Code 8109260
Modello/Model FORMAT DGT 25/15 BF
Matricola/Serial n. 9999999999
PAR 1 = 01 (METHANE)/ 03 (LPG)
PAR 2 = 21
80
the following way:
– Turn the main switch off to stop electric
power reaching the boiler and close the
gas feed cock.
– Remove the outer casing and the gas
burner manifold unit. To clean the burner,
blow in a jet of air, so as to remove any
dust particles that may have accumula-
ted.
– Clean the heat exchanger, removing any
dust or residue from combustion. When
cleaning the heat exchanger or the bur-
ners, chemical products or steel bru-
shes MUST NOT BE USED.
Make sure that the tops of the burners
with the holes are free from encrusta-
tions.
– Reassemble the items removed from
the boiler, making sure to follow the cor-
rect sequence.
– Check operation of the main burner.
– After assembly of all the gas connec-
tions, these must be tested for sound-
ness, using soapy water or appropriate
products. DO NOT USE NAKED FLAMES.
– Do not use calcium chloride to treat the
plastic component during generator
maintenance.
4.4. 1
Chimney sweep function
To check boiler combustion, press at the
same time the installer's key (
a few seconds.
The chimney sweep function will switch on
and will continue for 15 minutes.
During the 15 minutes functioning of chim-
ney sweep function, pressing the keys (
and
) take the boiler respective at maxi-
mum (Hi) and at minimum (Lo) power.
From that moment, the boiler will start
Fig. 21
e
) for
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