83
IT
ES
PT
GB
4.6
DISMANTLING THE CASING
The casing may be removed completely to
facilitate boiler maintenance, as shown in
fig. 23.
4.7
CLEANING AND
MAINTENANCE
Carry out the cleaning of the generator in
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 bur-
ner, blow in a jet of air, so as to remove
any dust particles that may have accu-
mulated.
– 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.
– Af ter 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.
4.7.1
Chimney sweep function
(fig. 24)
To carry out the verification of combustion
in the boiler turn the selector and stop on
the position ( ) until the green/orange led
starts to flash intermittently. From that
moment the boiler will start functioning in
heating mode at the maximum power, with
switching off at 80°C and restarting at
70°C.
Before activating the chimney
sweep function make sure that the radia-
tor valves or eventual zone valves are
open.
The test may be carried out also
during hot-water service functioning. To do
so it is enough, after having activated the
chimney sweep function, to take some hot
water from one or more cocks. Even in this
condition the boiler functions at the maxi-
mum temperature always with the primary
controlled between 80°C and 70°C. During
the entire duration of the testing the hot
water taps must remain open. After
verifying the combustion the boiler should
be switched off by placing the selector on
the
OFF
position; then return the selector to
the desired function.
ATTENTION: After about 15 minutes, or
once the hot water request has been ful-
filled, the chimney sweep function auto-
matically deactivates.
1
2
Fig. 23
Spia lampeggiante
verde/arancio
2
4
5
3
Fig. 24
FLASHING
GREEN/ORANGE LED
